Matheus Samuel Cunha Braga, Ruben Dario Morales-Gamba, Maria Inês Braga de Oliveira, Jaydione Luiz Marcon, Grazyelle Sebrenski da Silva
{"title":"Integument morphology of the smallest Amazonian freshwater stingray Potamotrygon wallacei (Chondrichthyes: Potamotrygoninae)","authors":"Matheus Samuel Cunha Braga, Ruben Dario Morales-Gamba, Maria Inês Braga de Oliveira, Jaydione Luiz Marcon, Grazyelle Sebrenski da Silva","doi":"10.1007/s10641-024-01551-0","DOIUrl":"https://doi.org/10.1007/s10641-024-01551-0","url":null,"abstract":"<p>The cururu stingray (<i>Potamotrygon wallacei</i>) is an endemic species from the Negro River basin, Brazil. There are only a few studies describing the integument morphology and tissue repair in potamotrygonins. Therefore, this study aimed to describe the integument morphology of <i>P. wallacei</i> in different body portions and report the tissue repair in an injury observed on the edge of the pectoral fin in one individual. Four specimens of <i>P. wallacei</i> were collected in the Mariuá Arquipelago, near to the municipality of Barcelos, Amazonas. Samples of the integument were taken from the dorsal, tail and ventral region and from the edge of the pectoral fin. Subsequently, these samples were submitted to histological processes and stained with hematoxylin–eosin, PAS and Alcian Blue 2.5. In all the body portions, the epidermis comprises a non-keratinized stratified squamous epithelium with mucous and sacciform cells that secrete mucosubstances. In the epidermis, chromatophores are responsible for the brown coloration of this species. The epidermis is thickest in the dorsal region. The dermis comprises two strata: the <i>stratum laxum</i>, with thin collagen fibers, which is thicker on the ventral surface. The <i>stratum compactum</i>, dense in thick collagen fibers, is thicker in the tail region. The repaired pectoral fin showed a thin epidermis with a reduced number of mucous cells and restored cartilaginous radials. The integument of <i>P. wallacei</i> is similar to that described for other elasmobranchs and our findings suggest that this species has the ability to regenerate its integumentary tissues after a potential injury.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"118 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140889085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Why do fish larvae hatch when they do?","authors":"Fabrice Teletchea, Daniel Pauly","doi":"10.1007/s10641-024-01553-y","DOIUrl":"https://doi.org/10.1007/s10641-024-01553-y","url":null,"abstract":"<p>Hatching corresponds to the moment an individual leaves its egg envelope. Yet, hatching has scarcely aroused the interest of biologists, and the question posed here, ‘why do larvae hatch when they do?’ appears to have been rarely asked. In this proof-of-concept study, we tested the hypothesis that fish larvae hatch when a specific ratio between egg surface area (ESA) and larval surface area (LSA) is reached, irrespective of egg diameter and abiotic factors. An estimated mean ratio of 1: 1.52 (CI = 1.39–1.63) was obtained from the eggs of 33 species of teleosts, with diameters ranging from 0.63 to 5.7 mm. We assume that this ratio has a value beyond which the oxygen supply through the egg surface cannot cope with the oxygen requirements of the embryo. The detailed ecological consequences are unknown but can be expected to impact fisheries and aquaculture negatively.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"63 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140889120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Petriki, C. Ntislidou, D. Petrocheilou, K. Michaelidis, T.M. Perivolioti, A. Kouletsos, A. Laggis, D. C. Bobori
{"title":"Disentangling determinants of nearshore fish and crayfish assemblages in a canyon-shaped Mediterranean reservoir","authors":"O. Petriki, C. Ntislidou, D. Petrocheilou, K. Michaelidis, T.M. Perivolioti, A. Kouletsos, A. Laggis, D. C. Bobori","doi":"10.1007/s10641-024-01550-1","DOIUrl":"https://doi.org/10.1007/s10641-024-01550-1","url":null,"abstract":"<p>The distinct origin and hydrological characteristics of reservoirs, shaped by fluctuating water levels and seasonal variations, play a crucial role in determining aquatic species assemblages across diverse limnological zones. This study aimed to analyze fish and crayfish assemblages in the nearshore area of a canyon-shaped Mediterranean reservoir, seeking to identify seasonal and spatial convergent patterns and infer the factors influencing them. Samplings were conducted at five stations along the longitudinal profile of the reservoir at depths around 7 m using gillnets and hoops nets. A seasonal pattern emerged regarding species abundance and biomass, with higher values recorded during the warmer period. Additionally, a spatial trend was observed, indicating higher species abundance in the middle part of the reservoir and lower abundance near the dam, particularly during the colder period. Water transparency, temperature, and the distance from the dam were identified as the most significant factors affecting species assemblages in terms of abundance and biomass. This research provides valuable insights into the intricate interplay between environmental factors, seasonal changes, and the assemblages of aquatic species in a Mediterranean reservoir, contributing to our understanding of its ecological dynamics.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"146 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140812805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A multi-metric approach to characterize variability in Yellow Perch (Perca flavescens) use of Lake Ontario and two barrier-protected coastal wetlands","authors":"Kylee B. Wilson, Matthew E. Altenritter","doi":"10.1007/s10641-024-01552-z","DOIUrl":"https://doi.org/10.1007/s10641-024-01552-z","url":null,"abstract":"<p>Yellow Perch (<i>Perca flavescens</i>) inhabit both nearshore and coastal wetland habitats of the Laurentian Great Lakes throughout their lifetime and are known to exhibit different movement life histories. However, uncertainty persists in the spatial extent of this variation and in the duration of habitat use. To explore these uncertainties, we used a multi-metric approach that included water and otolith microchemistry and tissue stable isotope ratios (δ<sup>13</sup>C, δ<sup>15</sup>N). The ratio of manganese to calcium in otoliths was used to identify transitional movements between nearshore Lake Ontario and wetland habitats while carbon and nitrogen tissue isotope ratios revealed variable duration of wetland inhabitance. Our research suggests that the multi-metric approach was useful for addressing questions that could not be answered by one method alone. Our results demonstrate individual differences in duration of coastal wetland habitat residence among Yellow Perch, which may influence their susceptibility to recreational harvest. As Yellow Perch are an important species of consideration for management agencies such as the Great Lakes Fishery Commission, exposing such diversity is important when considering the potential for differential contributions of individuals with variable movement life histories to overall population stability and resilience over time.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"29 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140812806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mechanism of Ligilactobacillus salivarius GX118 in Regulating the Growth of Rainbow Trout (Oncorhynchus mykiss) and Resistance to Aeromonas salmonicida Infection","authors":"X. Cao, Bowen Wang, Wenhao Ren, Jiang Wang, Qi Liu, Yichao Ren, Xianliang Meng","doi":"10.3390/fishes9050157","DOIUrl":"https://doi.org/10.3390/fishes9050157","url":null,"abstract":"Lactic acid bacteria Ligilactobacillus salivarius has been shown to be a substitute for antibiotics in the treatment of bacterial disease in high animals. However, its beneficial mechanism in fish farming is still unclear. This study evaluated the antagonistic effects of the Ligilactobacillus salivarius GX118 strain on Aeromonas salmonicida and its regulation of rainbow trout growth in vivo and in vitro. The results found that GX118 produces an antibacterial substance that can directly destroy the cell wall of A. salmonicida. Whole-genome sequencing of GX118 revealed that Enterolysin A is a type III bacteriocin with antibacterial properties. An in vivo experiment showed that the supplementation of GX118 in diet competitively inhibited the colonization of A. salmonicida in the intestine. In addition, it was able to improve the growth performance of rainbow trout within a 21-day feeding experiment. The supplementation of GX118 increased the diversity of gut microbiota, in which the abundance of Bacteroidota, Blautia, and Rhodobacteraceae increased. In addition, the use of GX118 activated the expression of IFN-γ and NF-κB genes and reduced the expression level of IL-6 and IL-8, thus exhibiting a certain effect on activating the immunity of rainbow trout. This study provides a scientific basis for the development of antibacterial probiotics in the healthy farming of rainbow trout.","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"9 5","pages":"157-157"},"PeriodicalIF":0.0,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147885030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David Lecchini, Julien Tessonneau, Maguy Dulornne, Emma Gairin, Natacha Roux, Viliame Waqalevu, Léa Vignaud, Lana Minier, Océane Beaufort, Dorothée James, Malika Trouillefou, Charlotte. R. Dromard, Frédéric Bertucci
{"title":"Erosion vs. accretion of sandy beaches: their impacts on nursery areas of coral reef fish","authors":"David Lecchini, Julien Tessonneau, Maguy Dulornne, Emma Gairin, Natacha Roux, Viliame Waqalevu, Léa Vignaud, Lana Minier, Océane Beaufort, Dorothée James, Malika Trouillefou, Charlotte. R. Dromard, Frédéric Bertucci","doi":"10.1007/s10641-024-01547-w","DOIUrl":"https://doi.org/10.1007/s10641-024-01547-w","url":null,"abstract":"<p>Sandy beaches have experienced substantial human modifications worldwide for centuries. Yet, sandy beaches are known as nursery areas for coral reef fishes. Due to global and local stressors, the degradation of nurseries such as the sandy beaches may have wide reaching consequences for the resilience of reef fishes. In our study, the impact of erosion vs. accretion phenomena was highlighted on coral reef fish community in Guadeloupe in comparing the abundance and diversity of juvenile fish between two nearby beach sites (one that undergoes accretion and the other one that undergoes erosion since the 1950s). The main result showed that a significant retreat of sandy beach along the entire coastline, by bringing out an old reef, could create new habitats, favorable to the settlement of fish juveniles. This result is surprising when considering that erosion negatively affects coral reefs through the sedimentation, deterioration of water quality, and loss of habitat.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140797725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Manuel Castellanos-Juárez, Manuel Mendoza-Carranza, Eloísa Pacheco-Almanzar, Sergio H. Álvarez-Hernández, Ana L. Ibáñez
{"title":"The regularity of the striped mullet Mugil cephalus spawning in accordance with Gulf of Mexico tides","authors":"Manuel Castellanos-Juárez, Manuel Mendoza-Carranza, Eloísa Pacheco-Almanzar, Sergio H. Álvarez-Hernández, Ana L. Ibáñez","doi":"10.1007/s10641-024-01542-1","DOIUrl":"https://doi.org/10.1007/s10641-024-01542-1","url":null,"abstract":"<p>The striped mullet <i>Mugil cephalus</i> is a species of high commercial value with a spawning season that spans from autumn to winter in coastal areas of the northern Gulf of Mexico. The objective of this project was to study an annual cycle of monthly stages of <i>M. cephalus</i> sexual maturity in two southern Gulf of Mexico localities during 2018, to compare results with those reported for the rest of the Gulf of Mexico, and to analyze the spawning temporality vs. tidal oscillations. Specimens were obtained monthly (January–December 2018) from commercial captures collected in Alvarado Lagoon, Veracruz and Puerto Ceiba, Tabasco. Total length, standard length, and total weight were recorded after the fish were eviscerated and the gonads were separated, and sex, eviscerated weight, gonad weight, and the stage of sexual maturity were recorded. A Gonadosomatic Index was obtained, and the gonads with vitellogenetic development were observed to determine the spawning season. <i>M. cephalus</i> spawns simultaneously in both localities, together with virtually synchronous spawning throughout the Gulf of Mexico, from October to March in northern localities and from December to January in southern areas of the Gulf of Mexico. Meteorological tides produced by the “northers” throughout the Gulf of Mexico seem to trigger spawning migrations. The synchronous spawning of <i>M. cephalus</i> supports the evidence that this is a panmictic population in the Gulf of Mexico.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"54 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thodoros E. Kampouris, Apostolos Christopoulos, Yiannis G. Zevgolis, Panagiotis S. Economidis
{"title":"What the heck? On the finding of genus Oncorhynchus Suckley, 1861 individuals at the National Park of Mount Olympus, Greece","authors":"Thodoros E. Kampouris, Apostolos Christopoulos, Yiannis G. Zevgolis, Panagiotis S. Economidis","doi":"10.1007/s10641-024-01546-x","DOIUrl":"https://doi.org/10.1007/s10641-024-01546-x","url":null,"abstract":"<p>The Mediterranean region stands as a prominent biodiversity hotspot for the full spectrum of its habitats. However, it ranks among the most extensively invaded regions globally. This characterization aptly applies to the Balkan Peninsula, an expanse renowned for its elevated levels of biodiversity and endemism concerning freshwater fishes. Among the most frequently introduced fauna in the Balkans is the rainbow trout <i>Oncorhynchus mykiss</i> (Walbaum, 1792). Among the regions with very limited information available concerning the species’ distribution in Greece is Mount Olympus. The current study reports the first record of several <i>Oncorhynchus</i> individuals from upstream of Enipeas River. The specimens in view are the first ichthyofauna record for the region. Also, this manuscript discusses the potential introduction vectors. Two different methodologies were used. The first was the use of citizen-science and the second was the use of underwater cameras and systematic surveys at Enipeas River. The estimated depth at sampling stations ranged from 0.5 to 2 m. Trout individuals were found in all sampling stations, estimated at 7–10 cm in length.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"6 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Small mouth, big appetite: diet analysis of invasive smallmouth bass (Micropterus dolomieu) in Cultus Lake, British Columbia","authors":"Wendy Margetts, Brian A. Heise","doi":"10.1007/s10641-024-01543-0","DOIUrl":"https://doi.org/10.1007/s10641-024-01543-0","url":null,"abstract":"<p>As aquatic invasive species spread, their impacts on native systems are variable and important to understand from a management perspective. DNA sequencing and morphological analysis of stomach contents can provide insight into the diet of invasive opportunistic feeders, such as smallmouth bass (<i>Micropterus dolomieu</i>). Since their illegal introduction in 2017, smallmouth bass have proliferated in Cultus Lake, British Columbia and potential impacts on two species-at-risk (sockeye salmon and pygmy sculpin) are currently unknown. Bass (<i>n</i> = 204) were sampled in the spring/summer of 2020–2021 in Cultus Lake. DNA barcoding (<i>n</i> = 145) and visual analysis (<i>n</i> = 204) of diet were completed. Diet composition, factors influencing the predation of species-at-risk, and dietary shifts were analyzed. DNA analysis identified 32 more taxa at the family level than morphological analysis. Multiple logistic regression showed that bass were more likely to predate on <i>Oncorhynchus nerka</i> within the bass spawning grounds, and over 90% of bass had sculpin in their diets. Diet composition did not shift as bass size changed, demonstrating sustained predation on fish from 100 to > 300 mm total length. These results highlight the importance of understanding the potential impacts of an invasive species before investing in suppression to create effective plans and leverage funding opportunities.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"64 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Examination of freshwater drum populations at the center of their latitudinal range: implications for development of diverse recreational angling opportunities","authors":"","doi":"10.1007/s10641-024-01545-y","DOIUrl":"https://doi.org/10.1007/s10641-024-01545-y","url":null,"abstract":"<h3>Abstract</h3> <p>Freshwater drum (<em>Aplodinotus grunniens</em> Rafinesque, 1819) are found from Canada, through the central United States, and in Atlantic drainages of Mexico and Guatemala. Although populations are broadly distributed, locally abundant, and can produce individuals over 23 kg, the species is often not considered desirable among recreational anglers and, as such, not often studied by researchers. To inform future management of the species, populations occurring at the center of the species latitudinal range, Kansas, United States, were examined. Freshwater drum up to 600 mm were distributed across the eastern 2/3 of the state in variable abundance. Angler surveys at large impoundments from 2015 to 2022 indicated 4.4% of all fish captured were freshwater drum and the species comprised 1.2% of total fish harvest estimated from those surveys. Individual ages were assessed from two populations suggesting individuals as old as age 42 in Glen Elder and age 28 in Tuttle Creek. Instantaneous natural mortality estimates were 0.161 and 0.207 for Glen Elder and Tuttle Creek populations, respectively. Recruitment was variable in both populations but demonstrated similar multiyear cyclical patterns. Harvest modeling suggested recruitment overfishing may start to occur at 10 to 15% angling exploitation under liberal minimum length limits but 20 to 40% under more conservative minimum length limits. Results from this study highlight the status of freshwater drum populations and fisheries at the center of their latitudinal range and provide information that could inform development of species management plans rangewide. Additionally, this study provides a template that can be applied to similar underutilized native species that may be capable of supporting recreational fisheries in a changing future.</p>","PeriodicalId":11799,"journal":{"name":"Environmental Biology of Fishes","volume":"15 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140588505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}