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  Subjects -> BIOLOGY (Total: 3026 journals)
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BIOLOGY (1437 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 21)
Achievements in the Life Sciences     Open Access   (Followers: 4)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 23)
Acta Biologica Colombiana     Open Access   (Followers: 7)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 4)
Acta Biologica Sibirica     Open Access  
Acta Biomaterialia     Hybrid Journal   (Followers: 27)
Acta Biotheoretica     Hybrid Journal   (Followers: 5)
Acta Chiropterologica     Full-text available via subscription   (Followers: 6)
acta ethologica     Hybrid Journal   (Followers: 4)
Acta Limnologica Brasiliensia     Open Access   (Followers: 3)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales : The Journal of Silesian Museum in Opava     Open Access  
Acta Neurobiologiae Experimentalis     Open Access  
Acta Parasitologica     Hybrid Journal   (Followers: 9)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 4)
Advanced Studies in Biology     Open Access  
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 3)
Advances in Bioinformatics     Open Access   (Followers: 20)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 6)
Advances in Cell Biology     Open Access   (Followers: 25)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 13)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 12)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 6)
Advances in Ecological Research     Full-text available via subscription   (Followers: 46)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 21)
Advances in Enzyme Research     Open Access   (Followers: 9)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 8)
Advances in Genome Biology     Full-text available via subscription   (Followers: 11)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in Human Biology     Open Access   (Followers: 2)
Advances in Life Science and Technology     Open Access   (Followers: 14)
Advances in Life Sciences     Open Access   (Followers: 6)
Advances in Marine Biology     Full-text available via subscription   (Followers: 16)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 23)
Advances in Organ Biology     Full-text available via subscription   (Followers: 2)
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3)
Advances in Regenerative Biology     Open Access   (Followers: 1)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 5)
Advances in Structural Biology     Full-text available via subscription   (Followers: 8)
Advances in Virus Research     Full-text available via subscription   (Followers: 6)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 6)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 1)
Ageing Research Reviews     Hybrid Journal   (Followers: 9)
Aging Cell     Open Access   (Followers: 11)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
AJP Cell Physiology     Full-text available via subscription   (Followers: 14)
AJP Endocrinology and Metabolism     Full-text available via subscription   (Followers: 23)
AJP Lung Cellular and Molecular Physiology     Full-text available via subscription   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Biology Teacher     Full-text available via subscription   (Followers: 13)
American Fern Journal     Full-text available via subscription   (Followers: 1)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 10)
American Journal of Bioethics     Hybrid Journal   (Followers: 10)
American Journal of Human Biology     Hybrid Journal   (Followers: 13)
American Journal of Medical and Biological Research     Open Access   (Followers: 8)
American Journal of Plant Sciences     Open Access   (Followers: 19)
American Journal of Primatology     Hybrid Journal   (Followers: 16)
American Malacological Bulletin     Full-text available via subscription   (Followers: 3)
American Naturalist     Full-text available via subscription   (Followers: 73)
Amphibia-Reptilia     Hybrid Journal   (Followers: 6)
Anaerobe     Hybrid Journal   (Followers: 4)
Analytical Methods     Full-text available via subscription   (Followers: 10)
Anatomical Science International     Hybrid Journal   (Followers: 2)
Animal Cells and Systems     Hybrid Journal   (Followers: 4)
Annales de Limnologie - International Journal of Limnology     Hybrid Journal   (Followers: 1)
Annales françaises d'Oto-rhino-laryngologie et de Pathologie Cervico-faciale     Full-text available via subscription   (Followers: 3)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 7)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18)
Annals of Human Biology     Hybrid Journal   (Followers: 4)
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 16)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 25)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 1)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 39)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 16)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 20)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 10)
Anthropological Review     Open Access   (Followers: 24)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antibiotics     Open Access   (Followers: 9)
Antioxidants     Open Access   (Followers: 4)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 8)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apidologie     Hybrid Journal   (Followers: 4)
Apmis     Hybrid Journal   (Followers: 1)
APOPTOSIS     Hybrid Journal   (Followers: 8)
Applied Bionics and Biomechanics     Open Access   (Followers: 8)
Applied Vegetation Science     Full-text available via subscription   (Followers: 9)
Aquaculture Environment Interactions     Open Access   (Followers: 2)
Aquaculture International     Hybrid Journal   (Followers: 22)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 6)
Aquatic Biology     Open Access   (Followers: 5)
Aquatic Ecology     Hybrid Journal   (Followers: 32)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 14)
Aquatic Science and Technology     Open Access   (Followers: 3)
Aquatic Toxicology     Hybrid Journal   (Followers: 20)
Archaea     Open Access   (Followers: 3)
Archiv für Molluskenkunde: International Journal of Malacology     Full-text available via subscription   (Followers: 3)
Archives of Biomedical Sciences     Open Access   (Followers: 7)
Archives of Microbiology     Hybrid Journal   (Followers: 8)
Archives of Natural History     Hybrid Journal   (Followers: 8)
Archives of Oral Biology     Hybrid Journal   (Followers: 2)
Archives of Virology     Hybrid Journal   (Followers: 5)
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arquivos do Museu Dinâmico Interdisciplinar     Open Access  
Arthropod Structure & Development     Hybrid Journal   (Followers: 2)
Arthropods     Open Access   (Followers: 1)
Artificial DNA: PNA & XNA     Hybrid Journal   (Followers: 3)
Artificial Photosynthesis     Open Access   (Followers: 1)
Asian Bioethics Review     Full-text available via subscription   (Followers: 2)
Asian Journal of Biodiversity     Open Access   (Followers: 5)
Asian Journal of Biological Sciences     Open Access   (Followers: 3)
Asian Journal of Cell Biology     Open Access   (Followers: 6)
Asian Journal of Developmental Biology     Open Access   (Followers: 2)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 2)
Asian Journal of Nematology     Open Access   (Followers: 3)
Asian Journal of Poultry Science     Open Access   (Followers: 4)
Australian Life Scientist     Full-text available via subscription   (Followers: 2)
Australian Mammalogy     Hybrid Journal   (Followers: 6)
Autophagy     Hybrid Journal   (Followers: 2)
Avian Biology Research     Full-text available via subscription   (Followers: 5)
Avian Conservation and Ecology     Open Access   (Followers: 13)
Bacteriology Journal     Open Access   (Followers: 2)
Bacteriophage     Full-text available via subscription   (Followers: 4)
Bangladesh Journal of Bioethics     Open Access  
Bangladesh Journal of Plant Taxonomy     Open Access  
Bangladesh Journal of Scientific Research     Open Access   (Followers: 2)
Berita Biologi     Open Access   (Followers: 1)
Between the Species     Open Access   (Followers: 1)
Bio Tribune Magazine     Hybrid Journal  
BIO Web of Conferences     Open Access  
BIO-Complexity     Open Access  
Bio-Grafía. Escritos sobre la Biología y su enseñanza     Open Access  
Bioanalytical Reviews     Hybrid Journal   (Followers: 2)
Biocatalysis and Biotransformation     Hybrid Journal   (Followers: 6)
Biochemistry and Cell Biology     Hybrid Journal   (Followers: 14)
Biochimie     Hybrid Journal   (Followers: 7)
BioControl     Hybrid Journal   (Followers: 5)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodemography and Social Biology     Hybrid Journal   (Followers: 1)
BioDiscovery     Open Access   (Followers: 2)
Biodiversity : Research and Conservation     Open Access   (Followers: 28)
Biodiversity and Natural History     Open Access   (Followers: 6)
Biodiversity Data Journal     Open Access   (Followers: 3)
Biodiversity Informatics     Open Access   (Followers: 1)
Biodiversity Information Science and Standards     Open Access  
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access  
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 2)
Bioelectromagnetics     Hybrid Journal   (Followers: 1)
Bioenergy Research     Hybrid Journal   (Followers: 2)
Bioengineering and Bioscience     Open Access   (Followers: 1)
BioEssays     Hybrid Journal   (Followers: 10)
Bioethics     Hybrid Journal   (Followers: 14)
BioéthiqueOnline     Open Access  
Biofabrication     Hybrid Journal   (Followers: 3)
Biogeosciences (BG)     Open Access   (Followers: 10)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 1)
Bioinformatics     Hybrid Journal   (Followers: 298)
Bioinformatics and Biology Insights     Open Access   (Followers: 15)
Bioinspiration & Biomimetics     Hybrid Journal   (Followers: 7)
Biointerphases     Open Access   (Followers: 1)
Biojournal of Science and Technology     Open Access  
Biologia     Hybrid Journal  
Biologia on-line : Revista de divulgació de la Facultat de Biologia     Open Access  
Biological Bulletin     Partially Free   (Followers: 5)
Biological Control     Hybrid Journal   (Followers: 4)
Biological Invasions     Hybrid Journal   (Followers: 17)
Biological Journal of the Linnean Society     Hybrid Journal   (Followers: 16)
Biological Letters     Open Access   (Followers: 4)
Biological Procedures Online     Open Access  
Biological Psychiatry     Hybrid Journal   (Followers: 42)
Biological Psychology     Hybrid Journal   (Followers: 6)
Biological Research     Open Access  
Biological Rhythm Research     Hybrid Journal   (Followers: 2)
Biological Theory     Hybrid Journal   (Followers: 2)
Biological Trace Element Research     Hybrid Journal  
Biologicals     Full-text available via subscription   (Followers: 9)
Biologics: Targets & Therapy     Open Access   (Followers: 1)
Biologie Aujourd'hui     Full-text available via subscription  
Biologie in Unserer Zeit (Biuz)     Hybrid Journal   (Followers: 41)
Biologija     Open Access  
Biology     Open Access   (Followers: 5)
Biology and Philosophy     Hybrid Journal   (Followers: 17)
Biology Bulletin     Hybrid Journal   (Followers: 1)
Biology Bulletin Reviews     Hybrid Journal  

        1 2 3 4 5 6 7 8 | Last

Journal Cover Amphibia-Reptilia
  [SJR: 0.677]   [H-I: 32]   [6 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0173-5373 - ISSN (Online) 1568-5381
   Published by Brill Academic Publishers Homepage  [227 journals]
  • Ecological preferences of Hyla molleri in the colonisation of arboreal
           refuges in a human-shaped wetland
    • Authors: Rita Lacerda do Vale; Inês Torres, Sara Gomes, Carlos Fonseca Eduardo Ferreira
      Abstract: Hyla molleri is well adapted to arboreal microhabitats, which are used among breeding seasons. This species is common in wetlands across the Iberian Peninsula and is therefore vulnerable to the loss and degradation of these ecosystems. Due to its secretive habits, the knowledge about the ecology of H. molleri, outside the breeding season, is still scarce. Using artificial refuges as a proxy to natural refuges, we studied how H. molleri uses arboreal microhabitats near reproductive areas and which environmental drivers influence refuge colonisation. We installed 70 PVC pipe refuges in isolated trees and tree patches. Pairs of pipes were installed at two different heights and monitored fortnightly, for four consecutive days, for one year. Each sampling day, we registered the values of variables related with seasonality, microhabitat, dominant plant species, weather and site fidelity. We recorded 2234 individual colonization events by H. molleri, including 516 multiple colonization events, with a maximum of nine individuals in a single refuge. Refuges that were colonized before were more likely to be colonized again. Additionally, colonization was lower in spring and summer and higher in tree clusters than in isolated trees. We found no significant differences on the height or temperature of colonized versus non-colonized refuges. Our results highlight the importance of adequate arboreal microhabitats and the need for the conservation of terrestrial habitats around breeding areas. We also show that artificial refuges can be useful for H. molleri and similar species, namely for habitat improvement or the implementation of citizen-science and monitoring programs.
      PubDate: 2018-01-08T00:00:00Z
       
  • A common toad hybrid zone that runs
           from the Atlantic to the Mediterranean
    • Authors: Jan W. Arntzen; Jacob McAtear, Roland Butôt Iñigo Martínez-Solano
      Abstract: We document the distribution of the common toad Bufo bufo and the spined toad B. spinosus at their contact zone across France with data from a mitochondrial DNA RFLP assay, complementing similar work including nuclear markers in the northwest and southeast of France and in Italy. We also reconstruct geographical clines across the species’ contact zone in central France. Bufo bufo is found in the north-eastern half of France. Bufo spinosus is found in the south-western complement. The contact zone they form runs from the Atlantic coast near Caen, France, to the Mediterranean coast near Savona, Italy, and has a length of over 900 km. In central France B. bufo and B. spinosus engage in a hybrid zone with a unimodal genetic signature. Hybrid zone width is ca. 10 km at mitochondrial DNA and averages at 61 km for four nuclear loci. The hybrid zone is distinctly asymmetric with a signature of B. spinosus in B. bufo and not the other way round. We attribute this observation to B. bufo moving southwards at the expense of B. spinosus, with introgression in the direction of the advancing species. We noted substantial geographic variation in characters for species identification. Morphological species identification performs well in France, but breaks down in Italy. Mitochondrial DNA is inconclusive in south-eastern France and Italy. The nuclear genetic markers perform consistently well but have not yet been applied to the zone in full. Possible, but surely heterogeneous ecological correlates for the position of the hybrid zone are mountains and rivers.
      PubDate: 2018-01-08T00:00:00Z
       
  • Maternal provisioning by foam-nesting frogs of the genus (Anura,
           Leptodactylidae) in contrasting environments (Advance Article)
    • Authors: Nadya C. Pupin; Célio F.B. Haddad Cynthia P.A. Prado
      Abstract: Source: Page Count 6In some environments prevailing conditions are unpredictable, thus anuran species use bet-hedging strategies and produce eggs of varied sizes. We investigated whether four species of Physalaemus (two from open, two from forest habitats) exhibit bet-hedging strategies, and if intra-clutch variation in egg size is greater for species that breed in the more unpredictable ponds of open habitats. All species studied adopted the bet-hedging strategy, with intra-clutch variation in egg size regardless of the environment; however, we found greater intra-clutch variation in the two species from open areas. The lower variation in egg-size found within forest habitats may be explained by the more stable environments that forest ponds provide for anuran eggs/embryos. Future studies in a phylogenetic context are needed to confirm the patterns detected here.
      PubDate: 2018-01-08T00:00:00Z
       
  • Intraspecific call variation in a Neotropical gladiator frog with a
           complex advertisement call
    • Authors: Rubens A.F. Turin; Renato C. Nali Cynthia P.A. Prado
      Abstract: Vocalisation is one of the most conspicuous behavioural traits in different animals, but its emission can be variable within species, depending on environmental, morphological, and/or social factors. Understanding how acoustic parameters vary can provide information about sexual selection mechanisms that might have shaped the species’ evolutionary history. We quantified and compared the variation of five call parameters within and among the males of Bokermannohyla ibitiguara, a Neotropical treefrog with complex reproduction and advertisement calls. The parameters were classified as static (dominant frequency), intermediate (note durations) or dynamic (pulse rate of the long note and call duration). Despite these differences, all of them varied more among individuals than within individuals, and most were associated with individual discrimination, showing potential acoustic recognition by males and females. A multiple regression analysis showed that all temporal parameters were affected by abiotic factors, except pulse rate of the long note; body size affected dominant frequency, duration of the long notes and call duration. This high variability in parameters, and the strong support for individual discrimination, indicate the existence of sexual selection mechanisms operating on calls; however, the individual recognition system is very complex and not limited to a single characteristic of the call. This is supported by the reproductive behavior of this species, including choosy females, elaborate courtships, and male-male vocal contests and physical combats. Fine-scale playback experiments with males and females will help us further understand sexual selection mechanisms in this and other acoustically oriented animals.
      PubDate: 2018-01-08T00:00:00Z
       
  • Redescription of the rare South American worm lizard (Squamata:
           Amphisbaenidae) (Advance Article)
    • Authors: Henrique C. Costa; Josefa Celsa Señaris, Fernando J.M. Rojas-Runjaic, Hussam Zaher Paulo C.A. Garcia
      Abstract: Source: Page Count 10Amphisbaena rozei is endemic to the Caura River basin in Venezuela, and known only from the holotype and one paratype. Its original description is very brief, lacking relevant information used by taxonomists today. Additionally, A. rozei appears to be similar to A. spurrelli, a species from northwestern Colombia and southern Panama. We present a redescription of A. rozei based on the examination of the type specimens and compare this taxon to the other known South American amphisbaenids, especially A. spurrelli. We conclude A. rozei is a valid name, and the species is diagnosed mainly by the presence of four precloacal pores, a lateral sulcus, 205–209 body annuli, 20 caudal annuli, 15–16 dorsal and 14 ventral segments on a midbody annulus, and dorsal surface of tail covered by strong tubercles.
      PubDate: 2018-01-02T00:00:00Z
       
  • Comparison of hematological parameters in two different high altitudinal
           populations of (Amphibian: Urodela)
    • Authors: Jianli Xiong; Yanan Zhang, Yuanye Sun, Qiangqiang Liu, Chaojie Fan, Yao Min, Jianping Gou Wanguang Chen
      Abstract: Source: Page Count 10Hematological parameters are key to reflect the health status of animals and their physiological adaptation to the environment. However, few studies focused on the inter- and intra-specific variations of hematological parameters in hynobiid salamanders. Here, we examined the hematological parameters of the stream salamander, Batrachuperus pinchonii, originating from two different altitudinal populations to explore their intra-specific variation. Sexual dimorphism is only present in the erythrocyte count and males have higher mean values than females. The morphometric values of erythrocyte, hemoglobin concentration, and erythrocyte count of the high altitudinal (Jiajin) population were smaller than those of the lower altitudinal (Sandaoping) population; however, a significant difference between two populations was only revealed in the case of erythrocyte length via ANOVA. The results of linear regression showed that a significant relationship was present between body condition and erythrocyte length as well as the erythrocyte length to erythrocyte width ratio. Our findings suggest that the features of hematological parameters in B. pinchonii are reflected in the size of erythrocyte, and neither in erythrocyte count nor in hemoglobin concentration. These results provide a foundation for assessing and monitoring the health status of this salamander species, and furthermore, for understanding the physiological basis of altitudinal adaptation.
      PubDate: 2018-01-02T00:00:00Z
       
  • The first ecological study on the oldest allochthonous population of
           European cave salamanders ( sp.)
    • Authors: Enrico Lunghi; Olivier Guillaume, Pauline Blaimont Raoul Manenti
      Abstract: Source: Page Count 7The introduction of allochthonous species often represents a serious problem for ecosystems and native species. Usually, these cases involve common widespread species that show high adaptability and strong competitiveness against local species. Within amphibians, the introduction of allochthonous species mainly deals with anurans, while cases involving caudata are few and poorly studied. We report the first assessment of an introduced population of European plethodontid salamanders. This population is located in the French Pyrenees and represents the oldest allochthonous Hydromantes population. We reconstructed the history of its introduction and collected data on the ecology and feeding habits of this population. Our results show that this population is stable and reproductive, showing strong similarities to Italian mainland species of Hydromantes. This study provided the base for further studies focused on this allochthonous population of European cave salamanders.
      PubDate: 2017-12-19T00:00:00Z
       
  • Naturally occurring triploids in contact zones between diploid/tetraploid
           and (Anura, Odontophrynidae) (Advance Article)
    • Authors: Pablo Grenat; Nancy Salas, Favio Pollo, Manuel Otero, Mariana Baraquet, Ulrich Sinsch Adolfo Martino
      Abstract: Source: Page Count 10Polyploidization plays an important role in speciation and evolution in anurans. However, a few stable triploid populations and some isolated triploid individuals have been reported. Here, we report the discovery of naturally occurring triploids in contact zones between diploid Odontophrynus cordobae and tetraploid O. americanus from Central Argentina, and propose values of erythrocyte area for the distinction of ploidy levels. A total of 101 individuals from three contact zones were studied and ploidy of each specimen was identified by mean chromosome count and erythrocyte size. Twenty three adult triploid specimens (males: n=21; females: n=2) from two contact sites were identified (percentage of individuals per ploidy level: site S2, 2n=40.6%, 3n=12.5%, 4n=46.9%; site S3: 2n=44.7%, 3n=40.4%, 4n=14.9%). The limit values of erythrocyte nuclear area used to distinguish between different ploidy levels were 23.62 μm2 (probability to be assigned to a respective ploidy level = 94.78%) for separating diploids and triploids and 27.67 μm2 (98.62%) for triploids and tetraploids. The high number of adult triploids occurring in more than one contact site between O. cordobae and O. americanus indicates that is not an isolated event. However, further studies are necessary to provide a hypothesis on the origin and evaluate the possible maintenance of triploids in syntopy with O. cordobae and O. americanus.
      PubDate: 2017-12-19T00:00:00Z
       
  • Feeding limitations in temperate anurans and the niche
           variation hypothesis
    • Authors: Carl S. Cloyed; Perri K. Eason
      First page: 473
      Abstract: Source: Volume 38, Issue 4, pp 473 - 482The niche variation hypothesis (NVH) states that populations with wider niches are more phenotypically variable. The NVH has important ecological and evolutionary implications but has been controversial since its inception. Recent interpretations have supported the NVH by directly comparing among-individual diet variation with population dietary niche breadth. Traditional studies of the NVH focused on morphological traits as proxies of niche variation, with contradictory results. Gape-limited predators may be relatively likely to show effects of morphological variation on diet breadth because gape size can strongly limit diet. We used five anurans to test NVH predictions, including three true frogs, Rana catesbeiana, R. clamitans, and R. sphenocephala, and two toads, Anaxyrus americanus and A. fowleri. We combined recent and traditional approaches by comparing both individual variation in diet and variation in gape width with dietary niche breadth. We found support for the NVH within two species of the three true frogs but not for either toad species, a difference likely driven by greater strength of the feeding limitation caused by gape width in the frogs. Toads had higher gape width to snout-vent length ratios, reducing the strength of the feeding limitation imposed by gape width. We found strong support for the NVH among species; species with more among-individual variation in diet and species with more variation in gape width had broader niches. Our results highlight the circumstances under which the NVH is applicable and demonstrate an example in which the NVH is supported through both traditional and recent interpretations.
      PubDate: 2017-11-27T00:00:00Z
       
  • Relationships of the morphological variation in diploids, triploids and
           mosaics of (Sauria: Liolaemidae)
    • Authors: Raúl Araya-Donoso; David Véliz, Marcela Vidal Madeleine Lamborot
      First page: 503
      Abstract: Source: Volume 38, Issue 4, pp 503 - 515Liolaemus chiliensis, a widely distributed species in Chile, is unique in vertebrates because it presents populations with diploid (2n), triploid (3n) and mosaic (2n/3n) females, and with diploid and mosaic males whose meiosis produces reduced (n) and unreduced (2n) euploid gametes. With the aim of evaluating evolutionary consequences of polyploidy, we analyzed the morphological variability of 103 adults of L. chiliensis from separated geographic areas using both traditional and geometric morphometry in order to visualize shape and size differences in individuals with different ploidy. The results indicated that Liolaemus chiliensis is morphologically variable; a significant effect was observed for the interaction term of the three factors tested: sex, ploidy and locality. From the analysis, females exhibited higher values of axilla groin distance than males. There were also morphological differences in mosaic and triploid organisms with respect to the sympatric and allopatric diploids in the dorsal shape of the head, and the presence of intermediate phenotypes of triploids and mosaic lizards with sympatric males and females associated with the axilla groin distance. Results showed that there are morphological differences between polyploid and diploid organisms with both traditional and geometric approaches, suggesting evolutionary trend to differentiation; future research is needed to assess the underlying ecological and genetic mechanisms related to this phenomenon.
      PubDate: 2017-11-27T00:00:00Z
       
  • A new moth-preying alpine pit viper species from Qinghai-Tibetan Plateau
           (Viperidae, Crotalinae)
    • Authors: Jingsong Shi; Gang Wang, Xi’er Chen, Yihao Fang, Li Ding, Song Huang, Mian Hou, Jun Liu Pipeng Li
      First page: 517
      Abstract: Source: Volume 38, Issue 4, pp 517 - 532The Sanjiangyuan region of Qinghai-Tibetan Plateau is recognized as a biodiversity hotspot of alpine mammals but a barren area in terms of amphibians and reptiles. Here, we describe a new pit viper species, Gloydius rubromaculatus sp. n. Shi, Li and Liu, 2017 that was discovered in this region, with a brief taxonomic revision of the genus Gloydius. The new species can be distinguished from the other congeneric species by the following characteristics: cardinal crossbands on the back, indistinct canthus rostralis, glossy dorsal scales, colubrid-like oval head shape, irregular small black spots on the head scales, black eyes and high altitude distribution (3300-4770 m above sea level). The mitochondrial phylogenetic reconstruction supported the validity of the new species and furthermore reaffirms that G. intermedius changdaoensis, G. halys cognatus, G. h. caraganus and G. h. stejnegeri should be elevated as full species. Gloydius rubromaculatus sp. n. was found to be insectivorous: preying on moths (Lepidoptera, Noctuidae, Sideridis sp.) in the wild. This unusual diet may be one of the key factors to the survival of this species in such a harsh alpine environment.
      PubDate: 2017-11-27T00:00:00Z
       
  • Resurrection of genus Nidirana (Anura: Ranidae) and synonymizing N.
           caldwelli with N. adenopleura, with description of a new species from
           China
    • Authors: Zhi-Tong Lyu; Zhao-Chi Zeng, Jian Wang, Chao-Yu Lin, Zu-Yao Liu Ying-Yong Wang
      Abstract: The taxonomy of Babina sensu lato was controversial in the past decades. In this study, the phylogeny of genus Babina sensu lato was re-constructed based on genetic analysis, morphological comparison and advertisement call analysis. We found that Babina sensu stricto and previous subgenus Nidirana should be two distinct genera in the family Ranidae. N. caldwelli is confirmed to be a synonym of N. adenopleura because of the small genetic divergence and the lack of distinct morphological differences. A new species, Nidirana nankunensis sp. nov. is described based on a series of specimens collected from Mt. Nankun, Guangdong Province, China, which can be distinguished from other known congeners by having a behavior of nest construction, distinctive advertisement calls, significant divergence in the mitochondrial genes, and a combination of morphological characters. Currently, the genus Babina contains two species and the genus Nidirana contains eight species.
      PubDate: 2017-11-13T00:00:00Z
       
  • Phylogeny, age structure, growth dynamics and colour pattern of the
           population in the Edough Massif, northeastern Algeria (Advance Article)
    • Authors: Selma Bouzid; Lara Konecny, Odile Grolet, Christophe J. Douady, Pierre Joly Zihad Bouslama
      Abstract: Source: Page Count 11The distribution of the Fire Salamander in North Africa is discontinuous and the Edough Peninsula, Algeria, is considered as the eastern edge of the distribution area. In the current study, we establish a description of the Salamandra algira algira population in its type locality. In this context, an analysis of the mitochondrial DNA D-loop of 47 sequences comes to confirm the phylogenetic status of our population with regard to the other Algerian and Moroccan populations. Also, we used the skeletochronological method for establishing the age structure of the population. Maximum longevity reached 18 years, with a high frequency of young adults, which suggests a good survival of the juveniles. The growth of males is faster than that of the females, although the maximum size of the males is 180 mm, while that of the females is 210 mm. The Edough’s salamander’s phenotype is characterized by multiple small white spots dispersed in different parts of the body (belly, sides, legs and throat) and a high number of large red spots. These red spots are surrounded by a ring of small white spots on the lower part of the body and sometimes on the legs, thus creating specific eyespots that are often aligned along the lower sides.
      PubDate: 2017-11-02T00:00:00Z
       
  • Distribution and diversity of amphibians in Albania: new data and
           foundations of a comprehensive database
    • Authors: Márton Szabolcs; Edvárd Mizsei, Daniel Jablonski, Balázs Vági, Béla Mester, Zsolt Végvári Szabolcs Lengyel
      Abstract: Albania is part of the Mediterranean biodiversity hotspot. Yet its amphibian fauna is poorly known due to little scientific exploration during the long political isolation of the country. To fill this gap, we constructed a georeferenced database with occurrences of all known amphibian species based on records from published sources and personal data collected during expeditions to poorly known areas. Our database includes 1097 records of 16 species collected between 1920 and 2017. Based on aggregated records, we analysed richness patterns of amphibians in 10 × 10 km grid cells as a function of altitude, climate, land cover diversity and distance from the sea. The mean number of species per cell was 1.8 ± 0.11 S.E. (maximum: 10 species) and at least one species occurred in 238 of the 349 cells. Sampling effort was uneven and sampling hotspots were mostly in popular sites of natural heritage. Cells with high amphibian diversity were near the Prokletije Mountains in the North-West, near Lura, Korab and Grammos Mountains and Ohrid and Prespa Lakes in the East, and near Çikës Mountains and in coastal areas of Vlorë in the South-West. General linear models showed that the most important predictors of presence and diversity of amphibian species are land cover diversity and precipitation. Our study presents the largest database of amphibian occurrences in Albania to date that will be useful for biogeographical and ecological studies and for conservation purposes.
      PubDate: 2017-10-31T00:00:00Z
       
  • Geographic variation in morphology of the genus Blanford, 1874 in Iran
           (Advance Article)
    • Authors: Seyyed Saeed Hosseinian Yousefkhani; Mansour Aliabadian, Eskandar Rastegar-Pouyani Jamshid Darvish
      Abstract: Source: Page Count 11The genus Agamura was previously known from four species occurring on the Iranian Plateau, but was recently revised as a monotypic genus that excluded three species. In the present study, we examined different populations of Agamura persica morphologically. We found that A. persica shows geographic variation with respect to two groups, with the eastern population considered as A. cruralis and A. persica proposed for the western population. Separation between the two populations of A. persica was verified based upon ANOVA results for many morphological characters, including Head Height (HH), Interorbital distance (IO), Forelimb length (FLL), Number of scales across widest part of abdomen (NSA), Loreal scales (LOS), and Number of scales that separate two adjacent tubercles (NTV). Principal Component Analysis (PCA) and Discriminant Function Analysis (DFA) based on metric and meristic characters confirmed the revision of the genus Agamura. Multivariate analysis indicated that all studied OTUs were assigned to the correct classification and have significantly different morphological characters.
      PubDate: 2017-10-30T00:00:00Z
       
  • The broad-snouted caiman population recovery in Argentina. A case of
           genetics conservation (Advance Article)
    • Authors: Patricia Susana Amavet; Eva Carolina Rueda, Juan César Vilardi, Pablo Siroski, Alejandro Larriera Beatriz Ofelia Saidman
      Abstract: Source: Page Count 14Caiman latirostris wild populations have suffered a drastic reduction in the past, and for that reason, a management and monitoring plan was applied since 1990 in Santa Fe, Argentina in order to achieve population recovery. Although ranching system has a noteworthy success in terms of population size recovering, there is no information about the estimation of population genetic parameters. In particular, the consequence of the bottleneck underwent by these populations has not been assessed. We evaluated variability and genetic structure of C. latirostris populations from Santa Fe through time, using microsatellites and mitochondrial DNA. Population genetic parameters were compared among four sites and three different periods to assess the impact of management activities, and effective population size was estimated in order to detect bottleneck events. We observed an increase in microsatellite variability and low genetic variability in mitochondrial lineages through time. Variability estimates are similar among sites in each sampling period; and there is scarce differentiation among them. The genetic background of each sampling site has changed through time; we assume this fact may be due to entry of individuals of different origin, through management and repopulation activities. Moreover, taking into account the expected heterozygosity and effective population size values, it can be assumed that bottleneck events indeed have occurred in the recent past. Our results suggest that, in addition to increasing population size, genetic variability of the species has been maintained. However, the information is still incomplete, and regular monitoring should continue in order to arrive to solid conclusions.
      PubDate: 2017-09-28T00:00:00Z
       
  • Contrasting reproductive strategies in a narrow latitude range: the case
           of D’Orbigny’s slider
    • Authors: Priscila Silva Lucas; Alex Bager
      Abstract: Source: Page Count 10Reproductive traits and the level of parental investment in offspring varies between individuals and species. These are central issues in life history theory and evolutionary biology. Maternal body size plays an important role in reproduction, and we usually observe variable investment in offspring by females. Thus, optimal egg size may not be reached in some populations or species. In this study, we tested if reproductive traits differed between populations of D’Orbigny’s slider in a specific geographical area in Brazil. We evaluated the relationship between reproductive traits to maternal body size and clutch size to egg size to determine possible trade-offs across populations. At the population level, maternal body size and reproductive traits of D’Orbigny’s slider were different even in geographically nearby areas. Maternal body size had a positive effect on clutch size, but not on egg size, except in the Arroio Grande population. Nevertheless, we did not observe a negative correlation between clutch and egg size in any population. Although maternal body size had effects in the different populations explaining most of the variation of clutch size, variation in egg size may be the result of decreased survival chances in unpredictable environments and possibly morphological constraints. The trade-off between egg size and number was not observed and this could be expected if resource availability and reproductive allocation by females vary greatly among individuals.
      PubDate: 2017-09-25T00:00:00Z
       
  • Very similar, but not identical: morphological taxonomic identification to
           improve the resolution of fine-scale distribution of Zootoca (vivipara)
           carniolica (Advance Article)
    • Authors: Ana Rodriguez-Prieto; Giovanni Giovine, Lorenzo Laddaga, Samuele Ghielmi Luca Cornetti
      Abstract: Improving the knowledge about the distribution of threatened species is a fundamental step forward for implementing effective measures for species conservation. Distribution maps of herpetological species are often inferred from morphological identification but, in some cases, morphology alone is not reliable for assessing the distribution of look-alike species. The common lizard Zootoca vivipara includes several lineages which, to date, cannot be distinguished by any conventional morphological traits. Therefore, a reliable taxonomic identification for the main Zootoca lineages is only feasible with genetic data. In this study, we identify a morphological trait that can be used to distinguish individuals of the parapatric Z. v. vivipara and Z. carniolica, without the support of molecular analyses. This method may provide a cost-effective tool to better depict the distribution of the threatened Z. carniolica and therefore prioritize the conservation of the locations where the oviparous Alpine lineage is found.
      PubDate: 2017-09-22T00:00:00Z
       
  • How little do we know about the reproductive mode in the north African
           salamander, Salamandra algira' Pueriparity in divergent mitochondrial
           lineages of S. a. tingitana
    • Authors: Marco Dinis; Guillermo Velo-Antón
      Abstract: Salamandra algira is one of the few species of vertebrates that displays intraspecific variation in reproductive strategies, making it a valuable study model in reproductive mode evolution. How pueriparity (viviparity) in S. algira arose remains unclear mainly due to insufficient information on the distribution of both reproductive modes in the species. This note summarizes what is known about pueriparous reproduction in S. algira and adds new data on the distribution and geographic limits of both reproductive strategies and mitochondrial lineages within S. a. tingitana across the Western Rif in Morocco, with possible implications for our understanding of the ecological context of pueriparity. The occurrence of pueriparity in two mitochondrial sublineages suggests multiple events of pueriparity evolution in S. algira, or a model of mitochondrial capture through hybridization and introgression across the contact zone.
      PubDate: 2017-09-22T00:00:00Z
       
  • The impact of sheep grazing on the fecundity and timing of reproduction in
           the endangered pygmy bluetongue lizard,
    • Authors: Torben P. Nielsen; C. Michael Bull
      Abstract: Source: Page Count 9The endangered pygmy bluetongue lizard (Tiliqua adelaidensis) is found only in a few remaining patches of South Australian native grassland, most of which are used for live stock grazing. The lizards occupy spider burrows, they mate in October-November and females produce litters of one to four live born neonates in mid-January-mid-March. In this study we use ultrasound scans of females and observations of neonates in their maternal burrows to investigate how grazing affects the fecundity of the pygmy bluetongue lizard. We predicted that lizards in moderately grazed paddocks would have a higher reproductive output than lizards in hard grazed paddocks. Ultrasound scans indicated that this hypothesis was correct by showing a higher mean number of yolk sacs in females from moderately than from hard grazed paddocks. Females from moderately grazed paddocks also gave birth significantly earlier than females in hard grazed paddocks. The higher number of yolk sacs did not result in a significantly higher number of neonates observed in the burrows, which indicates that the weekly burrow observations used in this study may underestimate true fecundity. Understanding how grazing affects the fecundity of the pygmy bluetongue lizard is essential to the future management of this endangered species. This is not only because grazing is used to manage the habitat of all currently known lizard populations, but also because successful reproduction will be needed in those populations to supply the “surplus” individuals predicted to be essential for relocation programs to ensure the survival of the species.
      PubDate: 2017-09-19T00:00:00Z
       
 
 
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