Subjects -> BIOLOGY (Total: 3134 journals)
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BIOLOGY (1491 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 31)
Abasyn Journal of Life Sciences     Open Access   (Followers: 3)
ACS Pharmacology & Translational Science     Hybrid Journal   (Followers: 5)
ACS Synthetic Biology     Hybrid Journal   (Followers: 39)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 5)
Acta Biologica Marisiensis     Open Access   (Followers: 3)
Acta Biologica Sibirica     Open Access   (Followers: 2)
Acta Biologica Turcica     Open Access   (Followers: 1)
Acta Biomaterialia     Hybrid Journal   (Followers: 31)
Acta Biotheoretica     Hybrid Journal   (Followers: 3)
Acta Chiropterologica     Full-text available via subscription   (Followers: 5)
acta ethologica     Hybrid Journal   (Followers: 7)
Acta Fytotechnica et Zootechnica     Open Access   (Followers: 3)
Acta Ichthyologica et Piscatoria     Open Access   (Followers: 5)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales     Open Access  
Acta Neurobiologiae Experimentalis     Open Access  
Acta Scientiae Biological Research     Open Access   (Followers: 1)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 4)
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis     Open Access   (Followers: 2)
Acta Universitatis Lodziensis : Folia Biologica et Oecologica     Open Access  
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Biology     Hybrid Journal   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 12)
Advanced Journal of Graduate Research     Open Access   (Followers: 1)
Advanced Membranes     Open Access   (Followers: 6)
Advanced Quantum Technologies     Hybrid Journal   (Followers: 3)
Advances in Bioinformatics     Open Access   (Followers: 22)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biology     Open Access   (Followers: 12)
Advances in Biomarker Sciences and Technology     Open Access   (Followers: 3)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 6)
Advances in Cell Biology/ Medical Journal of Cell Biology     Open Access   (Followers: 26)
Advances in Ecological Research     Full-text available via subscription   (Followers: 45)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 17)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in High Energy Physics     Open Access   (Followers: 26)
Advances in Human Biology     Open Access   (Followers: 8)
Advances in Life Science and Technology     Open Access   (Followers: 12)
Advances in Life Sciences     Open Access   (Followers: 5)
Advances in Marine Biology     Full-text available via subscription   (Followers: 29)
Advances in Tropical Biodiversity and Environmental Sciences     Open Access   (Followers: 5)
Advances in Virus Research     Full-text available via subscription   (Followers: 8)
Adversity and Resilience Science : Journal of Research and Practice     Hybrid Journal   (Followers: 3)
African Journal of Ecology     Hybrid Journal   (Followers: 18)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 12)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Ageing Research Reviews     Hybrid Journal   (Followers: 13)
Aggregate     Open Access   (Followers: 1)
Aging Cell     Open Access   (Followers: 22)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
AJP Cell Physiology     Hybrid Journal   (Followers: 16)
AJP Endocrinology and Metabolism     Hybrid Journal   (Followers: 26)
AJP Lung Cellular and Molecular Physiology     Hybrid Journal   (Followers: 4)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 1)
Alces : A Journal Devoted to the Biology and Management of Moose     Open Access  
Alfarama Journal of Basic & Applied Sciences     Open Access   (Followers: 8)
All Life     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 7)
American Journal of Bioethics     Hybrid Journal   (Followers: 18)
American Journal of Human Biology     Hybrid Journal   (Followers: 17)
American Journal of Medical and Biological Research     Open Access   (Followers: 4)
American Journal of Plant Sciences     Open Access   (Followers: 24)
American Journal of Primatology     Hybrid Journal   (Followers: 17)
American Naturalist     Full-text available via subscription   (Followers: 80)
Amphibia-Reptilia     Hybrid Journal   (Followers: 5)
Anaerobe     Hybrid Journal   (Followers: 3)
Analytical Methods     Hybrid Journal   (Followers: 8)
Analytical Science Advances     Open Access   (Followers: 1)
Anatomia     Open Access   (Followers: 12)
Anatomical Science International     Hybrid Journal   (Followers: 3)
Animal Cells and Systems     Hybrid Journal   (Followers: 5)
Animal Microbiome     Open Access   (Followers: 3)
Animal Models and Experimental Medicine     Open Access  
Annales françaises d'Oto-rhino-laryngologie et de Pathologie Cervico-faciale     Full-text available via subscription   (Followers: 2)
Annales Henri Poincaré     Hybrid Journal   (Followers: 2)
Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 6)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18)
Annals of Human Biology     Hybrid Journal   (Followers: 5)
Annals of Science and Technology     Open Access   (Followers: 2)
Annual Research & Review in Biology     Open Access  
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 18)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 24)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 3)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 44)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 31)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 11)
Anthropological Review     Open Access   (Followers: 28)
Antibiotics     Open Access   (Followers: 12)
Antioxidants     Open Access   (Followers: 4)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 8)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 3)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apidologie     Hybrid Journal   (Followers: 4)
Apmis     Hybrid Journal   (Followers: 1)
APOPTOSIS     Hybrid Journal   (Followers: 8)
Applied Biology     Open Access  
Applied Bionics and Biomechanics     Open Access   (Followers: 4)
Applied Phycology     Open Access  
Applied Vegetation Science     Full-text available via subscription   (Followers: 9)
Aquaculture Environment Interactions     Open Access   (Followers: 7)
Aquaculture International     Hybrid Journal   (Followers: 25)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 9)
Aquatic Biology     Open Access   (Followers: 9)
Aquatic Ecology     Hybrid Journal   (Followers: 42)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 16)
Aquatic Science and Technology     Open Access   (Followers: 4)
Aquatic Toxicology     Hybrid Journal   (Followers: 26)
Arabian Journal of Scientific Research / المجلة العربية للبحث العلمي     Open Access  
Archaea     Open Access   (Followers: 3)
Archiv für Molluskenkunde: International Journal of Malacology     Full-text available via subscription   (Followers: 1)
Archives of Biological Sciences     Open Access  
Archives of Microbiology     Hybrid Journal   (Followers: 9)
Archives of Natural History     Hybrid Journal   (Followers: 8)
Archives of Oral Biology     Hybrid Journal   (Followers: 2)
Archives of Virology     Hybrid Journal   (Followers: 6)
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2)
Arctic     Open Access   (Followers: 8)
Arid Ecosystems     Hybrid Journal   (Followers: 2)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arquivos do Museu Dinâmico Interdisciplinar     Open Access  
Arthropod Structure & Development     Hybrid Journal   (Followers: 2)
Arthropod Systematics & Phylogeny     Open Access   (Followers: 3)
Artificial DNA: PNA & XNA     Hybrid Journal   (Followers: 2)
Artificial Intelligence in the Life Sciences     Open Access  
Asian Bioethics Review     Full-text available via subscription   (Followers: 2)
Asian Journal of Biological Sciences     Open Access   (Followers: 2)
Asian Journal of Biology     Open Access  
Asian Journal of Biotechnology and Bioresource Technology     Open Access  
Asian Journal of Cell Biology     Open Access   (Followers: 4)
Asian Journal of Developmental Biology     Open Access   (Followers: 1)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 3)
Asian Journal of Nematology     Open Access   (Followers: 4)
Asian Journal of Poultry Science     Open Access   (Followers: 3)
Atti della Accademia Peloritana dei Pericolanti - Classe di Scienze Medico-Biologiche     Open Access  
Australian Life Scientist     Full-text available via subscription   (Followers: 2)
Australian Mammalogy     Hybrid Journal   (Followers: 8)
Autophagy     Hybrid Journal   (Followers: 8)
Avian Biology Research     Hybrid Journal   (Followers: 4)
Avian Conservation and Ecology     Open Access   (Followers: 17)
Bacterial Empire     Open Access   (Followers: 1)
Bacteriology Journal     Open Access   (Followers: 2)
Bacteriophage     Full-text available via subscription   (Followers: 2)
Bangladesh Journal of Bioethics     Open Access  
Bangladesh Journal of Plant Taxonomy     Open Access  
Bangladesh Journal of Scientific Research     Open Access  
Berita Biologi     Open Access  
Between the Species     Open Access   (Followers: 2)
BIO Web of Conferences     Open Access  
Bio-Grafía. Escritos sobre la Biología y su enseñanza     Open Access  
Bio-Lectura     Open Access  
BIO-SITE : Biologi dan Sains Terapan     Open Access  
Bioactive Compounds in Health and Disease     Open Access  
Biocatalysis and Biotransformation     Hybrid Journal   (Followers: 5)
BioCentury Innovations     Full-text available via subscription   (Followers: 2)
Biochemistry and Cell Biology     Hybrid Journal   (Followers: 18)
Biochimie     Hybrid Journal   (Followers: 4)
BioControl     Hybrid Journal   (Followers: 2)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodemography and Social Biology     Hybrid Journal   (Followers: 1)
BIODIK : Jurnal Ilmiah Pendidikan Biologi     Open Access  
BioDiscovery     Open Access   (Followers: 2)
Biodiversitas : Journal of Biological Diversity     Open Access   (Followers: 2)
Biodiversity : Research and Conservation     Open Access   (Followers: 30)
Biodiversity Data Journal     Open Access   (Followers: 8)
Biodiversity Informatics     Open Access   (Followers: 3)
Biodiversity Information Science and Standards     Open Access   (Followers: 2)
Biodiversity Observations     Open Access   (Followers: 2)
Bioeduca : Journal of Biology Education     Open Access   (Followers: 1)
Bioeduscience     Open Access   (Followers: 2)
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 1)
Bioelectromagnetics     Hybrid Journal   (Followers: 1)
Bioenergy Research     Hybrid Journal   (Followers: 3)
Bioengineering and Bioscience     Open Access   (Followers: 1)
BioEssays     Hybrid Journal   (Followers: 11)
Bioethica     Open Access   (Followers: 1)
Bioethics     Hybrid Journal   (Followers: 21)
BioéthiqueOnline     Open Access   (Followers: 1)
Biogeographia : The Journal of Integrative Biogeography     Open Access   (Followers: 2)
Biogeosciences (BG)     Open Access   (Followers: 17)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 4)
Bioinformatics     Hybrid Journal   (Followers: 283)
Bioinformatics Advances : Journal of the International Society for Computational Biology     Open Access   (Followers: 3)
Bioinformatics and Biology Insights     Open Access   (Followers: 13)
Biointerphases     Open Access   (Followers: 1)
Biojournal of Science and Technology     Open Access  
BioLink : Jurnal Biologi Lingkungan, Industri, Kesehatan     Open Access  
Biologia     Hybrid Journal   (Followers: 1)
Biologia Futura     Hybrid Journal  
Biologia on-line : Revista de divulgació de la Facultat de Biologia     Open Access  
Biological Bulletin     Partially Free   (Followers: 6)
Biological Control     Hybrid Journal   (Followers: 6)

        1 2 3 4 5 6 7 8 | Last

Similar Journals
Journal Cover
Avian Biology Research
Journal Prestige (SJR): 0.401
Citation Impact (citeScore): 1
Number of Followers: 4  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1758-1559 - ISSN (Online) 1758-1567
Published by Sage Publications Homepage  [1176 journals]
  • First report of house crow Corvus splendens removing burning cotton wicks
           from oil lamps, extinguishing and eating

    • Free pre-print version: Loading...

      Authors: Pathissery John Sarlin, Sancia Morris, Savio Morris, Sandie Morris, Polycarp Joseph, Darshitha Sherly
      Abstract: Avian Biology Research, Ahead of Print.
      Corvids have long impressed scientists with their flexibility in problem-solving and innovative tool use. Opportunistic observations of five wild house crows (Corvus splendens), a couple of them approaching burning oil lamps and delicately lifting the flaming wick and extinguishing it to consume the cotton wick are reported here. Although similar behaviour has been reported earlier in a few species, this is the first report of such an observation in house crows. Wild crows probably with no experience performing this fire manipulation, wary of nearby humans, could put the bird or its surroundings in jeopardy. Anecdotal reports of crows setting haystacks and thatched roofs ablaze are popular. The crow’s manoeuvres on the burning lamp and the skilful manipulation of the burning wick without getting hurt are commendable and warrant further research. Studies on the nonhuman fire-handling capability could illuminate our understanding of the behaviour of our ancestral hominins towards the fire that led to their mastery over fire.
      Citation: Avian Biology Research
      PubDate: 2023-05-21T10:13:38Z
      DOI: 10.1177/17581559231176984
       
  • Food monotony compromises photoperiod induced responses in migratory
           redheaded bunting

    • Free pre-print version: Loading...

      Authors: Anupama Yadav, Shalie Malik, Sangeeta Rani
      Abstract: Avian Biology Research, Ahead of Print.
      Food is one of the key environmental factors affecting an organism’s behavior and physiology on daily and seasonal basis. Over the years, studies regarding human food habits and its subsequent impact on their behavior and physiology have been explored a lot but studies on same line are missing with reference to different animal taxa. Thus, in the present study, we investigated the impact of varied food availability over a monotonous food schedule on birds. We were interested in knowing how this treatment affects the birds’ behavior and physiology' The experiment was performed on migratory passerine finch; redheaded bunting (Emberiza bruniceps), wherein two groups of bird (N = 10 each) were taken. Group I (Kakuni group; KG) birds were fed only with seeds of Setaria italica (Kakuni) whereas group II (Mixed Diet group; MG) was provided with seeds of kakuni along with sesame seeds (Sesamum indicum) and egg white, all three separately in different bowls. Results reveal that behaviorally, MG birds were more active with higher gross food intake when compared with KG. MG birds also had significant gain in body mass and testicular volume during the course of experiment, although, the accumulation of fat remained unchanged between the two groups. Thus, the study clearly demonstrates the motivation to eat and stay active besides being reproductively proficient in presence of varied food availability.
      Citation: Avian Biology Research
      PubDate: 2023-05-16T12:41:05Z
      DOI: 10.1177/17581559231176756
       
  • The call type variation and usages of the Eurasian tree sparrow Passer
           montanus

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      Authors: Ju-Hyun Lee, Ha-Cheol Sung
      Abstract: Avian Biology Research, Ahead of Print.
      Bird call, which is widely used in all species of birds, is short, simple, and functionally diverse in comparison to song. Here, we have recorded call types of Eurasian tree sparrows (Passer montanus) at multiple situations and various communal behaviors. The Eurasian tree sparrow belongs to the oscine (song-learning) group of songbirds, but their calls are more developed than their song. The calls are used to communicate a variety of behaviors in their social flock. In this study, we categorized call types and usages in relation to the situation on the basis of visual categorization of spectrograms and descriptive measurements. Adult Eurasian tree sparrows have 9 call types (including 9 sub-types at A1 family) and chicks have one (including 2 sub-types). Each call type could be classified as A1 contact call, A2 Fight-intention call, A3 Aerial call, A4 Alarm/Anxiety call, A5 Emergency call, A6 Warning/Threat call, A7 Stimulate call, A8 Screaming call, A9 Social calling, and C1 Begging call. Our results suggest that the diversity of Eurasian tree sparrow’s call types is related to the complex social structure of the species, and might be associated to evolution of sociality. Further research on correlation between various call types and social behavior is needed to find social communication characteristics of Eurasian tree sparrows and other social weaver species with similar ecology may reveal whether evolutionary pressures of sociality lead to increased call complexity.
      Citation: Avian Biology Research
      PubDate: 2023-05-02T01:22:16Z
      DOI: 10.1177/17581559231174114
       
  • Effect of RNA preservation methods on RNA quantity and quality of
           field-collected avian whole blood

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      Authors: Johanna A Harvey, Sarah A Knutie
      Abstract: Avian Biology Research, Ahead of Print.
      The transcriptome comprises all RNA molecules in a sample, tissue, or organism. A limitation of comparative transcriptomic studies which compare gene expression between individuals often under some differing exposure or treatment, of wild avian populations continues to be sample preservation of high-quality RNA (i.e., ribonucleic acids that transfer, translate, and regulate the genetic code from DNA into proteins). Field sampling of wild bird blood provides challenges as RNA degradation progresses quickly, due in large part to the high nuclease content of avian blood and because cryopreservation is often not feasible at remote locations. The introduction of commercial buffers for preservation of RNA enables field-collected studies as these buffers deactivate nucleases which degrade target nucleic acids. We seek to compare the effectiveness of widely available RNA stabilizing buffers, RNAlater (Ambion) and DNA/RNA Shield (Zymo) at varying concentrations along with a dry ice-based flash freezing method to determine optimal preservation methods for field-collected avian blood samples. To determine optimal preservation methods, we assessed RNA quantity and quality metrics: RNA integrity numbers (RINe), rRNA ratios, and total RNA concentration. Nucleated red blood cells, a characteristic common across non-mammalian vertebrates, provide sufficient transcriptionally active material enabling the identification of potentially active gene regions from small and non-lethal samples (∼ 20 μl). A protocol was also optimized for total RNA extraction from avian blood samples with small starting volumes enabling sampling of birds with a minimum threshold of 5 g body mass. We found that RNA preservation buffers, RNAlater and DNA/RNA Shield at all concentrations provide sample protection from RNA degradation. We recommend that caution be exercised when using dry ice-based flash-freezing alone for sample preservation as these samples resulted in lower quality measures then samples in preservation buffer. Total RNA concentration was generally not affected by preservation treatment and may vary due to differences in initial sample volumes.
      Citation: Avian Biology Research
      PubDate: 2023-04-05T08:31:16Z
      DOI: 10.1177/17581559231169179
       
  • Male plumage colouration predicts female reproductive investment and
           nestling survival in a colour dimorphic tropical songbird

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      Authors: Dalila de Fátima Ferreira, Filipe C. R. Cunha, Leonardo Esteves Lopes
      Abstract: Avian Biology Research, Ahead of Print.
      In sexually colour dimorphic bird species, males can exhibit phenotypic variation, with males breeding in either dull female-like plumage or brightly coloured plumage. Two contradictory hypotheses predict that the male phenotype variation can influence the female investment in a given breeding attempt. Whereas females usually prefer males in bright coloured plumage, the “differential allocation hypothesis” predicts that females should invest more in their reproductive output when mating with them; while the “compensatory investment hypothesis” predicts that females should invest more when mating with non-preferred males. To test those predictions, we analysed reproductive data for two consecutive breeding seasons (2018–2019 and 2019–2020) of Lined Seedeaters Sporophila lineola. S. lineola is a socially monogamous songbird species in which males exhibit two breeding phenotypes, a black-and-white plumage being the most common, and a less common female-like brownish plumage. Our findings show that females mated with brownish males have a higher reproductive investment (i.e., egg volume) than those mated with black-and-white males. Despite the lower investment of females in egg volume, our results showed that black-and-white males have a higher nestling survival, producing more hatchings and fledglings per season than brownish males, which could suggest a higher fitness. Our findings indicate that investment allocation on the eggs and offspring survival rates can be attributed to the plumage colour of males.
      Citation: Avian Biology Research
      PubDate: 2023-01-19T09:43:39Z
      DOI: 10.1177/17581559231152711
       
  • Survival of a small reintroduced griffon vulture population in the
           Apennines: Insights from Global Positioning System tracking

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      Authors: Flavio Monti, Pietro Serroni, Francesco Rotondaro, Alberto Sangiuliano, Andrea Sforzi, Giancarlo Opramolla, Antonello Pascazi, Samuele Spacca, Filippo La Civita, Mario Posillico
      First page: 3
      Abstract: Avian Biology Research, Ahead of Print.
      Conservation translocations (e.g., restocking, reintroductions) represent efficient tools to prevent the extinction or favouring the return of previously extirpated populations into the wild. Evaluating demographic parameters of translocated populations is a key issue to assess and monitor their conservation status and to provide evidences useful to implement management actions aimed at long-term conservation results. We report first data on survival estimates and related mortality causes for a reintroduced population of Eurasian griffon vultures (Gyps fulvus) in the central-southern Apennine, Italy, from satellite telemetry data. Twenty vultures have been fitted with solar-powered Global Positioning System (GPS) tags in Pollino National Park (PNP, southern Italy, N = 9) and Monte Velino Reserve (MVR, central Italy, N = 11). Survival has been estimated on a total amount of 173,568 GPS fixes from December 2016 to October 2020 (1415 days) using the Fleming-Harrington estimator. Five, out of 20 vultures, died by poisoning (40%), collision with wind turbines (20%) and of unknown causes (40%). Two birds dispersed from MVR to France (though they later came back) and one from PNP to Croatia. Estimated survival rate across the whole study period was 0.709 (±0.11, SE; 0.523–0.961, 95% CI), and annual survival rate was 0.915 (±0.06, SE; 0.846–0.990, 95% CI). No significant differences in survival rates have been detected according to sex or age. As mortality in our study was mainly human-caused, we urge relevant institutions and agencies to strengthen and effectively establish anti-poison strategies, as well as implementing mitigation and prevention measures for the existing and planned wind farms. The establishment of a long-term viable population in the central-southern Apennines will depend upon both lower levels of human-caused mortality and habitat preservation.
      Citation: Avian Biology Research
      PubDate: 2022-10-31T09:19:50Z
      DOI: 10.1177/17581559221137309
       
  • Radar Indications of Altered Foraging Behavior during the February 2021
           Severe North American Cold Wave

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      Authors: Matthew S Van Den Broeke
      First page: 14
      Abstract: Avian Biology Research, Ahead of Print.
      Total radar cross-section of birds was quantified in observations of four large bird assemblages with daily sunrise foraging flights for January and February 2021, including the severe February 2021 cold wave. Reduced foraging behavior during the cold wave was expected as birds reduced energy expenditure during the extreme cold. While this was observed with two assemblages in Oklahoma where the cold was most severe, a site in central Texas showed the opposite response, indicating increased foraging to meet increased energy demands. Foraging behavior was influenced by temperature and windspeed, but the direction of this influence differed across sites. This difference seemed partially driven by cold wave severity at individual sites, and may have also been influenced by differing species composition.  At the site where waterbirds were the primary contributors, these larger and more cold-tolerant species showed less of a wind/temperature dependence.
      Citation: Avian Biology Research
      PubDate: 2022-12-07T12:57:20Z
      DOI: 10.1177/17581559221145450
       
  • Consumption of arthropods by hummingbirds in the Sierra Madre de Chiapas,
           Mexico

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      Authors: Ruth Partida-Lara, Paula L Enríquez, Guillermo Ibarra Nuñez, Eduardo Chamé Vázquez
      First page: 21
      Abstract: Avian Biology Research, Ahead of Print.
      An organism's morphological features can determine the type of prey they consume due to adaptive advantages in capturing them, for example, the shape and length of the bill in birds. Hummingbirds have been considered specialists in nectar consumption. However, they have been documented to also be important insectivores in ecosystems. In this study, we evaluated arthropod consumption by hummingbirds in relation to their bill and capture strategies. We theorized that hummingbirds with short-medium bills (9-11 bill length to body mass cube root ratio) capture a higher proportion of non-flying arthropods, as they have a lower linear speed of closure of the bill tip relative to the base, while species with long bills (13-14) capture mainly flying arthropods. The study was conducted in El Triunfo Biosphere Reserve, Chiapas, southeastern Mexico from 2015 to 2016, where seven hummingbird species that captured arthropods, their strategies of capture, and the type of prey consumed were recorded. We also analyzed the stomach contents (n = 72 stomachs) collected in the Sierra Madre de Chiapas. We calculated the frequency of occurrence of arthropods and their diversity, as well as the breadth of the feeding niche and the bill-prey relationship of 15 hummingbird species. The Green-throated Mountain-gem (Lampornis viridipallens) and Rivoli's Hummingbird (Eugenes fulgens) presented the highest richness of arthropod consumption. Arthropod prey belonged to eight orders, where Hymenoptera and Diptera were the most frequent. The most recorded capture strategies were on the substrate in sustained flight (37.5%) and hovering in sustained flight (33.3%). A positive association was found between the type of arthropods consumed and the morphological traits of the hummingbirds, non-flying arthropods were captured by hummingbirds with short-medium bills, while hummingbirds with long bills captured flying arthropods. Morphological adaptations for food resource use are a trait that determines food selection, capture, and handling success.
      Citation: Avian Biology Research
      PubDate: 2022-12-27T03:00:53Z
      DOI: 10.1177/17581559221144896
       
  • Symbiotic microbes play a role more important than preen gland in avian
           pheromone production––A review

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      Authors: Dharmaraj Praveenkumar, Arumugam Vinothkumar, Gnanasekaran Saravanan, Muniraj Selvakumar, Alagan Subbaiah Vijayakumar, Pachan Kolanchinathan, Soundararajan Kamalakkannan, Shanmugam Achiraman
      First page: 32
      Abstract: Avian Biology Research, Ahead of Print.
      The uropygial gland or preen gland is a complex holocrine structure present only in birds, and plays an important role in avian communication and reproduction. This gland produces preen oil, which helps birds maintain intact plumage, plumage colorage, but also possesses antibacterial and anti-predator properties, and the evidence for these claims is still in infancy. Preen gland harbour a large number of microbiota among which as many as 110 are bacterial genera dominated by Firmicutes, Proteobacteria, Bacteroidetes, etc., families, and the roles of these microbes are largely unknown. However, these microbes are believed to maintain symbiotic relationship with the host and exert positive effects in the host’s physiology and behaviour. Many studies have proven that these microbes produce chemical cues as metabolic by-products that modulate the host’s behavior. In birds, these symbiotic microbes are needed for normal growth, development and even reproduction. Earlier findings about preen gland microbiota of birds connect it to good feather condition, recent evidences connect it to antifungal and antimicrobial activities. Although preen gland plays a major role in bird’s development, symbiotic microbes of preen gland seem to play a crucial role in reproduction and pheromonal communication. Here, we review the role of microbes present in avian preen gland in production of chemical signals and document the relationship between the microbes and preen gland in chemical communication.
      Citation: Avian Biology Research
      PubDate: 2022-11-03T07:51:08Z
      DOI: 10.1177/17581559221137503
       
 
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