Subjects -> ENVIRONMENTAL STUDIES (Total: 913 journals)
    - ENVIRONMENTAL STUDIES (810 journals)
    - POLLUTION (31 journals)
    - TOXICOLOGY AND ENVIRONMENTAL SAFETY (54 journals)
    - WASTE MANAGEMENT (18 journals)

POLLUTION (31 journals)

Showing 1 - 27 of 27 Journals sorted by number of followers
Water, Air, & Soil Pollution     Open Access   (Followers: 22)
Aerosol Science and Technology     Hybrid Journal   (Followers: 15)
Water, Air, & Soil Pollution : Focus     Hybrid Journal   (Followers: 7)
Journal of Hazardous, Toxic, and Radioactive Waste     Full-text available via subscription   (Followers: 6)
Journal of Limnology     Open Access   (Followers: 6)
Archives of Environmental Protection     Open Access   (Followers: 5)
Journal of Energy, Environment & Carbon Credits     Full-text available via subscription   (Followers: 5)
Greenhouse Gases : Science and Technology     Hybrid Journal   (Followers: 4)
Journal of the Air & Waste Management Association     Hybrid Journal   (Followers: 4)
Open Journal of Air Pollution     Open Access   (Followers: 4)
Jurnal Pengendalian Pencemaran Lingkungan     Open Access   (Followers: 4)
Ciencias Marinas     Open Access   (Followers: 3)
Energy and Emission Control Technologies     Open Access   (Followers: 3)
Atmospheric Pollution Research     Hybrid Journal   (Followers: 2)
Aerosol Science and Engineering     Hybrid Journal   (Followers: 2)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
Pollution     Open Access   (Followers: 1)
Emerging Contaminants     Open Access   (Followers: 1)
Current Pollution Reports     Hybrid Journal   (Followers: 1)
Exposure and Health     Hybrid Journal   (Followers: 1)
Environmental Chemistry and Ecotoxicology     Open Access   (Followers: 1)
Microplastics and Nanoplastics     Open Access   (Followers: 1)
Environmental Pollutants and Bioavailability     Open Access   (Followers: 1)
Journal of Air Pollution and Health (رتبه علمی- پژوهشی)     Open Access  
Revista Internacional de Contaminación Ambiental     Open Access  
Latin American Journal of Aquatic Research     Open Access  
Hidrobiológica     Open Access  
Similar Journals
Journal Cover
Latin American Journal of Aquatic Research
Journal Prestige (SJR): 0.289
Citation Impact (citeScore): 1
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Online) 0718-560X
Published by SciELO Homepage  [688 journals]
  • Geometric morphometric analysis of the variations in cephalothorax shape
           of the freshwater prawn Macrobrachium tenellum, Smith (Decapoda
           Palaemonidae) from two different coastal basins in Oaxaca, Mexico

    • Abstract: ABSTRACT Morphological variations of Macrobrachium tenellum prawns from two populations from locations in the Copalita and Colotepec riverine basins in the seashore of Oaxaca, Mexico, were studied with geometric morphometry techniques. The purpose was to find and explain significant differences in shape and size between the cephalothorax and the rostrum. Differences between sexes and populations were intended to prove intra and inter-populations. Results suggest low intrapopulation differences but significant interpopulation variation between specimens from different places, while a regression analysis suggests a higher correlation between shape and size only in males. The higher differences in places between and within sexes could be explained due to differences in environmental pressure. A positive allometry bias in males could indicate a sexual selection mechanism affecting mating.
       
  • Impact of isolation on growth performance, behavior, and stress responses
           in Nile tilapia, Oreochromis niloticus

    • Abstract: ABSTRACT The effects of isolation on the growth performance, behavior, blood hematology, and cortisol level of Nile tilapia, Oreochromis niloticus were checked in laboratory conditions. All fishes were closely observed for behavior and growth-related parameters. The weight and diameter of both the control and treatment groups were measured before and after the trial of 28 days using an electronic balance and measuring tape, respectively. At the end of the trial, blood was drawn from the caudal fin to determine some hematological and hormonal parameters. Significant differences were seen in growth performance, cortisol level, and hematology, as weight gain, specific growth rate, relative growth rate, and daily food intake were significantly higher in the control group. In comparison, cortisol levels and feed conversion ratio were significantly higher in the isolated group. White blood cells, lymphocytes, red blood cells, hemoglobin, hematocrit, and mean platelet volume, were significantly higher in the isolated group when compared to the control group. At the same time, the amount of granulocytes, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, and platelets was significantly higher in the control group. Isolated fish showed aggressive behavior towards introduced fish from the control group. Isolation increased the cortisol level, which indicates that the fish was stressed. It is concluded that isolation significantly affects the growth performance, cortisol level, and hematology of O. niloticus.
       
  • Sustaining local ecological knowledge of artisanal fishers: a perspective
           from northern Colombia

    • Abstract: ABSTRACT Fishing is one of the oldest activities developed by humans for both food subsistence and economic gain. Artisanal fishing has a great social impact; it helps satisfy basic nutritional needs and generates income for communities. Therefore, local ecological knowledge associated with such fishing practices is important because of its capacity to provide data on fishing research. Fishing in the study area is largely artisanal for subsistence, a consequence of the fact that there are no fishing associations or cooperatives which might empower local workers and help promote the sector. We based our study on a quantitative approach. Through this approach, we analyzed factors that influence future fishing decisions among artisanal fishers in a community in northern Colombia. We found that socioeconomic conditions and pollution were important considerations when respondents contemplated future fishing prospects. Respondents’ perceptions of institutional support also influenced their attitudes about fishing. Most respondents planned to continue fishing. We encourage local authorities in such communities to address the challenges faced by artisanal fishers and develop strategies to improve the socioeconomic and environmental conditions in which such people work.
       
  • Reproduction of Lutjanus guttatus (Perciformes: Lutjanidae) captured in
           the Mexican Central Pacific

    • Abstract: ABSTRACT Research on the reproduction of snappers helps to manage and conserve them. The spotted rose snapper Lutjanus guttatus is a gonochoric species caught year-round in Navidad Bay, Jalisco, Mexico. This work aims to analyze the reproductive aspects of the spotted snapper L. guttatus caught in Navidad Bay on the southern coast of Jalisco, Mexico. Analyzed fish came from commercial catches. Organisms were sampled monthly from January 1998 to December 2008, and total length, total weight, sex, gonad weight, and gonadal phase were obtained for each specimen. Histological analysis was performed to define the gonadal phase and measure the oocytes' diameter. The total length range in the catches was 14.0 to 61.0 cm; 2889 females and 2792 males were collected for a sex ratio 1.0:0.97. The oocyte development is asynchronous, with a diameter range from 33.9 to 407.9 μm. The testicle is of the lobular type, with a well-defined spermatic duct. A main reproductive season from June to September was identified, although fish with mature gonads were observed in all months. The best condition was observed before the reproductive period. Average lengths at sexual maturity were 30.09 and 30.05 cm for females and males, respectively; the average length of capture in females (32.2 cm) and males (31.7 cm) corresponds to 66.6 and 64.6% of organisms that had reproduced at least once before being captured. Given the importance and continuous capture of L. guttatus in the study area, we recommend further studies to improve the understanding of reproductive and fishing activities.
       
  • Contribution to some aspects of the digestive tract anatomy and food
           evacuation of the Pacific fat sleeper Dormitator latrifrons

    • Abstract: ABSTRACT The development of feeding protocols and the study of gastric evacuation or passage of food through the digestive tract is essential to generate information on the digestive physiology of organisms, as they help to quantify the daily ration to avoid any poor diet. In this sense, the present work aims to demonstrate some basic aspects of the fish Dormitator latifrons digestive physiology by evaluating the transit of food through the intestinal tract as a function of time. In a completely randomized standard design, juveniles of D. latifrons were fed ad libitum with commercial pellets. Five conditioned organisms were sacrificed every hour after a single feeding. The food bolus was collected at each sampling point, using polynomial regression models to analyze the passage of food through time in the digestive tract. The passage of food showed a nonlinear behavior in time, being the simple exponential decay model of two parameters (R2 = 0.630; P < 0.0001) the best to explain the evacuation of food through the digestive tract. This knowledge will generate better feeding protocols for this species with commercial importance and aquaculture potential.
       
  • Growth and survival analysis of early stages in the pen shell Atrina maura
           during pilot-commercial production

    • Abstract: ABSTRACT Hatchery spat of pen shells is difficult to obtain as production runs generally fail. We present a case of commercial pilot spat production of Atrina maura in the hatchery, describing each phase in detail and determining the growth of larvae and postlarvae using multi-model inference (MMI). Growth rates of larvae in D-veliger to umbo stage (D-larvae = 65 ± 5.1 μm height and 75 ± 5.1 μm length) increased from 4.33 μm d-1 up to 675.6 μm d-1 during postlarvae stage (spat = 10.9 ± 2.2 mm height and 28.1 ± 4.4 mm length). Survival presented a significant daily decrease from 22.5% (beginning) to a final absolute survival of 0.042%. Hence, 50,000 commercial spats were produced from 120 million D-larvae. MMI showed that the best-fitting model describing growth corresponds to a Gompertz model for shell length and an exponential model for shell height. Critical phases were transitioning from D-larvae to the umbo stage (>80% collapse of cultures) and high mortality during metamorphosis. Further studies are required to find solutions to these problems. The results of this study may contribute to improving the management of pen shell production in the hatchery, as the production protocol is different from those used for other bivalve species.
       
  • Therapeutic, histopathological, and non-specific immune status effect of
           Rhizophora mangle and Laguncularia racemose hydroalcoholic extracts
           against Vibrio harveyi and Vibrio campbellii in white shrimp (Penaeus
           vannamei)

    • Abstract: ABSTRACT The objective of the research was to evaluate in vitro and in vivo antibacterial efficacy of Rhizophora mangle and Laguncularia racemose when added to the feed of Penaeus vannamei in an experimental infection with Vibrio harveyi (CAIM 1792) and V. campbellii (CAIM 333). Results show that the minimum inhibitory concentration for both extracts was 1.65 g mL-1, with an inhibition zone of 25 ± 1 mm (V. campbellii); 18 ± 2 mm (V. harveyi) for L. racemose and of 21 ± 2 mm (V. campbellii); 20 ± 2 mm (V. harveyi) for R. mangle. R. mangle gave a higher total content of phenolic compounds (4.50 ± 0.26 mg GAE mL-1) and flavonoids (2.60 ± 0.15 mg QE mL-1). The challenge with V. harveyi resulted in 70% survival for organisms fed L. racemose extract and 53% for R. mangle extract. The challenge with V. campbellii resulted in 80% survival for organisms fed L. racemose and 90% R. mangle. Histopathological alterations were observed in the hepatopancreas with hemocytic infiltration within the intertubular connective tissue. Also, tubules with severe cell detachment and tubular atrophy were detected in the positive control organisms, and organisms treated with R. mangle and L. racemose only had vermiform structures in the tubular lumen, cell detachment, and infiltration hemolymph in intertubular connective tissue. According to the analysis of the studied variables, it can be concluded that the hydroalcoholic extracts of R. mangle and L. racemose reduced mortality, clinical signs, and organs and tissue alterations and improved P. vannamei immunity. It is possible to use these hydroalcoholic therapeutic extracts as treatments in shrimp-farm to enhance bacterial disease tolerance and prevent mortality.
       
  • Prochlorococcus and Synechococcus marine cyanobacteria:
           a scientometrics review

    • Abstract: ABSTRACT Prochlorococcus and Synechococcus are the dominant primary producers in the ocean and account for a significant percentage of oceanic carbon fixation. This review summarizes the available data in the literature (1992-2021; n = 480) using CiteSpace software to provide insights into the specific characteristics of Prochlorococcus and Synechococcus genes that scientists can use for establishing future research directions. From 1992 to 2021, the most frequent and with higher centrality keyword was “multiple evolutionary origin” (0.43), followed by flow cytometry (0.40), because this period was the main method used to identify cyanobacteria. In 2001-2010, were “sequence” and “gene”, both with 0.13 of centrality; this can be explained by the period when gene sequencing was developed. In the last 10 years period 2011-2021, were diversity (0.17); marine Synechococcus (0.10); Prochlorococcus ecotype (0.08); gene expression (0.14). Additionally, the migration characteristics of flow cytometry, genes identification methods, genomes, and ecotypes of cyanobacteria, indicate how future studies should focus in 1) molecular ecology: how genetic variability among different populations affects their adaptation to different ocean environments, 2) physiology: how this phytoplankton respond to changes in nutrient availability and solar radiation, 3) interactions with other living beings: how they interact with other organisms, such as bacteria, zooplankton, and fish, and how these interactions affect the dynamics of the ocean ecosystem, and 4) modeling: computational models are being developed to predict how the distribution will change in the future as a result of climate change and human use of the oceans.
       
  • Isolation, characterization, application, and effect of bacteria with
           probiotic potential from the prawn Macrobrachium tenellum in Guasave,
           Sinaloa, Mexico

    • Abstract: ABSTRACT The prawn Macrobrachium tenellum is a species with high expectations for farming. However, like all cultivated species, it is exposed to bacterial infections caused by captivity and cultivation conditions. In this sense, probiotics in aquaculture have been used as an alternative against the excessive use of antibiotics in farming, thus preventing diseases. In the present work, 106 strains with probiotic potential were isolated, of which 77 are bacilli, and 29 are lactic acid bacteria (LAB) [(intestine (43), stomach (42) and hepatopancreas (21)] from the shrimp M. tenellum collected from a freshwater environment in Guasave, Sinaloa. Biochemical characterization of the isolated bacterial strains and molecular identification of the 16S ribosomal gene were performed. According to the hemolytic activity, the isolates MT4H2 (bacilli) and MT1E2 (LAB) showed gamma hemolysis (Ɣ), and the LAB strain presented catalase-negative. Both were Gram (+). They presented high hydrophobicity values (99.93 and 73.21%) in autoaggregation (90%) and coaggregation (99%). Regarding biofilm formation, both presented moderate capacity. On salinity tolerance, they grew in concentrations of 0 to 9% NaCl and a pH tolerance within a range of 5 to 9. Regarding enzyme activity, they exhibited activity in both proteases and lipases. Both presented resistance to some of the antibiotics tested. Only the strain of bacillus exhibited antagonistic activity against Vibrio parahaemolyticus. They were identified as Pontibacillus sp. and Pediococcus pentosaceus at a molecular level.
       
  • Morphological characterization of blood cells in Amazon River dolphin Inia
           geoffrensis: a case study

    • Abstract: ABSTRACT Inia geoffrensis is an endangered species of the Amazon River basin, but there has been limited research regarding its health, particularly in describing normal cell morphology by traditional techniques. This study aimed to identify the peripheral blood cells of I. geoffrensis through microscopic evaluation. Blood smears were collected from wild adults and stained with Wright’s stain. We differentiated leukocyte cells (neutrophils, eosinophils, lymphocytes, and monocytes) and platelets. Additionally, we observed signs of inflammatory reactions in cell morphology by incrementing cell size and active cytoplasm in neutrophils, eosinophils, lymphocytes, and platelets. These findings provide important considerations for hemogram interpretation in future research and individual clinical cases in Amazon River dolphins. Also, our study delivers baseline information for future characterization and understanding of hemogram and leukogram changes in response to disease and health assessment for dolphin species.
       
  • Some blood parameters of Pacific fat sleepers, Dormitator latifrons
           (Richardson, 1844): a comparative study between male and female in two
           growth stages

    • Abstract: ABSTRACT Dormitator latifrons is an amphidromous fish widely distributed in the Pacific slope from California to Peru. Although this species has a high potential for aquaculture, there is little information about the blood parameters of sex and growth stage. Eighty specimens of D. latifrons (40 males and 40 females in two growth stages) were used. They were placed in 1700 L tanks, one for each group, and fed with a feed for Tilapia diet with 35% protein and 8% fat. At the end of 30 days, blood samples were collected. Some blood parameters were determined (hematocrit, glucose, total protein, albumin, globulin, and A/G), and hematocrit percentage, glucose, albumins, and globulins presented significant differences between stages (P < 0.05). Total proteins showed differences only between males and females (P < 0.05). The hematocrit registered significant differences between stage and sex (P < 0.05). Differences between stages and sex may be related to a higher growth rate, differences in feed conversion, an increase in energy expenditure, and variations in hormonal levels. This study is the first to determine some blood parameters of D. latifrons under experimental aquaculture conditions concerning sex and growth stage.
       
  • First record of hyper melanosis in the Patagonian redfish Sebastes
           oculatus Valenciennes, 1833 (Scorpaenidae) in the southeastern Pacific
           Ocean

    • Abstract: ABSTRACT The coloration pattern alteration occurs at a low frequency in fish. The excesses of dark pigments in living organisms are known as melanism or melanosis, but a total blackening of the skin is known as hyper melanism or hyper melanosis. Little is known about why the extreme conditions of albinism and melanosis occur among fish. To date, there are no records of melanism for the genus Sebastes. Here, we report the first case of hyper melanosis in rockfish Sebastes oculatus (Patagonian redfish) in the southeastern Pacific Ocean. In 2005, small-scale fishers from Quintay Beach (Valparaiso, Chile) captured a single individual of Patagonian redfish covered with an excess of dark pigmentation. The specimen had a total length of 35.5 cm, and we followed the literature available to determine its morphometric and meristic features. The measurements led us to conclude that the specimen was a black S. oculatus with a rare melanosis condition. Our finding contributes to the knowledge of this species, and we infer that this melanosis case was caused by genetic heritage or some intergenetic hybridization. Still, genetic studies are necessary to confirm this hypothesis.
       
  • Blue button (Cnidaria: Hydrozoa) distribution and trends in the Mexican
           Atlantic, based on field surveys and open-access data

    • Abstract: ABSTRACT Access to digital technology and software allows the production of a significant amount of biodiversity data, including citizens' species records, combined with field monitoring and standardized surveys, which are valuable to biological sciences; these data can help to know the distribution of organisms like medusozoans. We compiled records of the presence of Porpita porpita from open-access databases, scientific articles, and field observations to know their current distribution on the Mexican Atlantic for the first time. The yearly records of P. porpita increased over time, adding up to 22 records, of which 18 were assigned to citizen science. Most records correspond to 2011-2022, from April to May, and the Veracruz and Quintana Roo states. The records of the species in warm months and states with long shores can be related to an increase in touristic activities and observations by citizens. On the Mexican Atlantic, it is suggested that the use of digital technological devices under citizen science practices for recording P. porpita and its compilation in open-access databases acts as the principal method for tracking the distribution of this species. This work evidenced the need for a solid research framework of knowledge for P. porpita in the Mexican Atlantic, and future research could combine citizen science records and fieldwork records and improve the relationship between biological and oceanographic data to understand their spatial-temporal distribution patterns.
       
  • New insights on expression and purification of a recombinant luciferase
           protein from the bioluminescence marine dinoflagellate Pyrocystis lunula

    • Abstract: ABSTRACT Bioluminescence is interesting, among other reasons, for the various technological applications that have been derived from it. Among these applications, developing visualization techniques to record the expression of one or more genes simultaneously in real-time are particularly useful. With this in mind, this study aimed to generate a recombinant Pyrocystis lunula luciferase protein (Luci D2-3 partial CDS). As the main results, i) a fragment of 1467 bp of the luciferase (LCFb) mRNA of the dinoflagellate P. lunula, containing part of domain 2 and all of the domain 3, was cloned in the pET28a vector; ii) the constructed vector was used to transform Escherichia coli to express the recombinant protein and subsequently purify it through an affinity chromatography procedure using a His-Tag; and iii) the purified protein (∼50 kDa) was further analyzed by mass spectrometry to confirm its identity. Despite being unable to perform activity tests with the luciferin substrate, the evidence from previous studies indicates that the recombinant protein obtained in this case is enzymatically active. Due to the limited number of currently available luciferases, synthesizing this recombinant protein represents a useful tool, especially in designing expression assays coupled to multiple reporter genes, thus expanding the palette of proteins available for developing this type of biotechnological advances.
       
 
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  Subjects -> ENVIRONMENTAL STUDIES (Total: 913 journals)
    - ENVIRONMENTAL STUDIES (810 journals)
    - POLLUTION (31 journals)
    - TOXICOLOGY AND ENVIRONMENTAL SAFETY (54 journals)
    - WASTE MANAGEMENT (18 journals)

POLLUTION (31 journals)

Showing 1 - 27 of 27 Journals sorted by number of followers
Water, Air, & Soil Pollution     Open Access   (Followers: 22)
Aerosol Science and Technology     Hybrid Journal   (Followers: 15)
Water, Air, & Soil Pollution : Focus     Hybrid Journal   (Followers: 7)
Journal of Hazardous, Toxic, and Radioactive Waste     Full-text available via subscription   (Followers: 6)
Journal of Limnology     Open Access   (Followers: 6)
Archives of Environmental Protection     Open Access   (Followers: 5)
Journal of Energy, Environment & Carbon Credits     Full-text available via subscription   (Followers: 5)
Greenhouse Gases : Science and Technology     Hybrid Journal   (Followers: 4)
Journal of the Air & Waste Management Association     Hybrid Journal   (Followers: 4)
Open Journal of Air Pollution     Open Access   (Followers: 4)
Jurnal Pengendalian Pencemaran Lingkungan     Open Access   (Followers: 4)
Ciencias Marinas     Open Access   (Followers: 3)
Energy and Emission Control Technologies     Open Access   (Followers: 3)
Atmospheric Pollution Research     Hybrid Journal   (Followers: 2)
Aerosol Science and Engineering     Hybrid Journal   (Followers: 2)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
Pollution     Open Access   (Followers: 1)
Emerging Contaminants     Open Access   (Followers: 1)
Current Pollution Reports     Hybrid Journal   (Followers: 1)
Exposure and Health     Hybrid Journal   (Followers: 1)
Environmental Chemistry and Ecotoxicology     Open Access   (Followers: 1)
Microplastics and Nanoplastics     Open Access   (Followers: 1)
Environmental Pollutants and Bioavailability     Open Access   (Followers: 1)
Journal of Air Pollution and Health (رتبه علمی- پژوهشی)     Open Access  
Revista Internacional de Contaminación Ambiental     Open Access  
Latin American Journal of Aquatic Research     Open Access  
Hidrobiológica     Open Access  
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JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


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