H. Judkins, L. Rose-Mann, A. Lindgren, M. Taite, S. Bush, M. Vecchione
Only two species of Helicocranchia—Helicocranchia pfefferi Massy, 1907 and Helicocranchia papillata Nesis, 1987—are currently accepted as valid. The genus is found globally in tropical and subtropical regions at depths to >1000 m (Voss 1980). We collected Helicocranchia specimens in the northern Gulf of Mexico during the DEEPEND project (Deep Pelagic Nekton Dynamics of the Gulf of Mexico; sampling 2015–2018) and from the western North Atlantic Ocean during two different research cruises. Physical examination of specimens found differences from recognized species in external pigmentation and in the morphology of the gladius rostrum. Molecular analysis of the COI gene in the specimens also revealed species-level differences. This study reviews current taxonomy and describes a new Helicocranchia species.
{"title":"A newly discovered Helicocranchia species (Cephalopoda: Cranchiidae: Taoniinae) in the northern Gulf of Mexico","authors":"H. Judkins, L. Rose-Mann, A. Lindgren, M. Taite, S. Bush, M. Vecchione","doi":"10.5343/bms.2021.0048","DOIUrl":"https://doi.org/10.5343/bms.2021.0048","url":null,"abstract":"Only two species of Helicocranchia—Helicocranchia pfefferi Massy, 1907 and Helicocranchia papillata Nesis, 1987—are currently accepted as valid. The genus is found globally in tropical and subtropical regions at depths to >1000 m (Voss 1980). We collected Helicocranchia specimens in the northern Gulf of Mexico during the DEEPEND project (Deep Pelagic Nekton Dynamics of the Gulf of Mexico; sampling 2015–2018) and from the western North Atlantic Ocean during two different research cruises. Physical examination of specimens found differences from recognized species in external pigmentation and in the morphology of the gladius rostrum. Molecular analysis of the COI gene in the specimens also revealed species-level differences. This study reviews current taxonomy and describes a new Helicocranchia species.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70883656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Jensen, Tomoharu Eguchi, N. FitzSimmons, M. McCarthy, M. Fuentes, Mark Hamann, C. Limpus, I. Bell, M. Read
The globally significant green turtle (Chelonia mydas) population in the northern Great Barrier Reef is threatened by anthropogenic pressures, including climate change, habitat degradation, and indigenous harvest. Evidence suggesting the population is producing an extreme proportion of females due to increasing temperatures, coupled with temperature-dependent sex determination, is concerning. In response, and to explore management options, we developed two density-independent, stochastic stage-structured metapopulation models: a “Moderate Climate Model” and an “Extreme Climate Model”. The models differ based on climate change projections by incorporating increased female hatchling sex ratios due to global warming and loss of nesting habitat due to sea level rise. The models were based on demographic data from field studies at major rookeries and regional foraging grounds and allowed for variation in operational sex ratios, management actions, and levels of indigenous harvest. Under the Moderate Climate Model, population size increased but could be vulnerable to overharvest of adult females. If overharvest was indicated, the harvest of a proportion of subadults rather than only adult females reduced population declines. Under the Extreme Climate Model, there was a steep population decline even without any harvest, and harvesting subadults accelerated population decline due to the inclusion of subadult males. In the Extreme Climate Model, reversal of population decline depended on male turtles mating with an increased number of females, or management actions to substantially increase the number of male hatchlings produced.
{"title":"Integrating climate change and management scenarios in population models to guide the conservation of marine turtles","authors":"M. Jensen, Tomoharu Eguchi, N. FitzSimmons, M. McCarthy, M. Fuentes, Mark Hamann, C. Limpus, I. Bell, M. Read","doi":"10.5343/bms.2021.0033","DOIUrl":"https://doi.org/10.5343/bms.2021.0033","url":null,"abstract":"The globally significant green turtle (Chelonia mydas) population in the northern Great Barrier Reef is threatened by anthropogenic pressures, including climate change, habitat degradation, and indigenous harvest. Evidence suggesting the population is producing an extreme proportion of females due to increasing temperatures, coupled with temperature-dependent sex determination, is concerning. In response, and to explore management options, we developed two density-independent, stochastic stage-structured metapopulation models: a “Moderate Climate Model” and an “Extreme Climate Model”. The models differ based on climate change projections by incorporating increased female hatchling sex ratios due to global warming and loss of nesting habitat due to sea level rise. The models were based on demographic data from field studies at major rookeries and regional foraging grounds and allowed for variation in operational sex ratios, management actions, and levels of indigenous harvest. Under the Moderate Climate Model, population size increased but could be vulnerable to overharvest of adult females. If overharvest was indicated, the harvest of a proportion of subadults rather than only adult females reduced population declines. Under the Extreme Climate Model, there was a steep population decline even without any harvest, and harvesting subadults accelerated population decline due to the inclusion of subadult males. In the Extreme Climate Model, reversal of population decline depended on male turtles mating with an increased number of females, or management actions to substantially increase the number of male hatchlings produced.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70883577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexander Kattan, D. Coker, J. Nowicki, Collin T. Williams, M. Berumen
Timing and location of transient reef fish spawning aggregations are fundamental data required to effectively manage populations, particularly those exposed to commercial fisheries. The giant trevally (Caranx ignobilis) is a semipelagic apex predator of ecological, economic, and cultural significance across its Indo-Pacific range, yet information regarding regional spawning aggregations for the species remains scarce. Here we present documentation to record, for the first time, putative transient spawning aggregations of giant trevally in the Red Sea. Considering that other C. ignobilis aggregations demonstrate highly predictable and specific spatiotemporal dynamics, relevant resource managers should pursue protection strategies to avoid rapid overexploitation of the stock.
{"title":"Putative spawning aggregations of giant trevally in the Red Sea","authors":"Alexander Kattan, D. Coker, J. Nowicki, Collin T. Williams, M. Berumen","doi":"10.5343/bms.2021.0039","DOIUrl":"https://doi.org/10.5343/bms.2021.0039","url":null,"abstract":"Timing and location of transient reef fish spawning aggregations are fundamental data required to effectively manage populations, particularly those exposed to commercial fisheries. The giant trevally (Caranx ignobilis) is a semipelagic apex predator of ecological, economic, and cultural significance across its Indo-Pacific range, yet information regarding regional spawning aggregations for the species remains scarce. Here we present documentation to record, for the first time, putative transient spawning aggregations of giant trevally in the Red Sea. Considering that other C. ignobilis aggregations demonstrate highly predictable and specific spatiotemporal dynamics, relevant resource managers should pursue protection strategies to avoid rapid overexploitation of the stock.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70884004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sea urchins are well known for their regenerative ability that can reconstruct damaged external appendages. Here, we present evidence for the purple sea urchin Heliocidaris crassispina in subtropical Hong Kong to survive and recover after partial removal of the peristomial membrane and spines.
{"title":"Tissue regeneration of the purple sea urchin Heliocidaris crassispina","authors":"E. Maboloc, J. K. Fang","doi":"10.5343/bms.2022.0019","DOIUrl":"https://doi.org/10.5343/bms.2022.0019","url":null,"abstract":"Sea urchins are well known for their regenerative ability that can reconstruct damaged external appendages. Here, we present evidence for the purple sea urchin Heliocidaris crassispina in subtropical Hong Kong to survive and recover after partial removal of the peristomial membrane and spines.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70884575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bryozoans are sessile suspension-feeders; however, some species become dislodged and represent drifting, ephemeral habitat. Beyond those on drift algae, there are relatively few studies describing the fauna associated with ephemeral habitats and the functions these habitats maintain in estuarine systems. Given the highly structured morphology of bryozoans and the muddy-bottom seascape of the north-central Gulf of Mexico, we hypothesized that the presence of bryozoans in nearshore waters provides additional temporally and spatially ephemeral habitat for invertebrates, small mobile fishes, or early life-stages of estuarine nekton. We examined seine and trawl samples from a long-term fisheries monitoring program operating within Mississippi Sound, Mississippi to test our hypothesis. Overall, we collected 71 and 85 invertebrate taxa in seine (2012–2017) and trawl (2013–2017) samples, respectively, with 40 taxa in common. We also collected 86 and 74 fish taxa overall in all seine (2012–2017) and trawl (2013–2017) samples, respectively, with 53 taxa in common. We documented highest species richness and species diversity indices when bryozoans were present and in large volumes; however, most of the samples with bryozoans present were collected between September and November. Our results suggest bryozoan mats likely serve as a dispersal mechanism and refugia for estuarine nekton within a soft-sediment seascape as mats pulse shoreward with winds, tides, and currents.
{"title":"Drifting bryozoans increase nekton diversity in the north-central Gulf of Mexico unvegetated muddy bottom seascape","authors":"E. J. Anderson, M. Peterson, Michael J. Andres","doi":"10.5343/bms.2021.0034","DOIUrl":"https://doi.org/10.5343/bms.2021.0034","url":null,"abstract":"Bryozoans are sessile suspension-feeders; however, some species become dislodged and represent drifting, ephemeral habitat. Beyond those on drift algae, there are relatively few studies describing the fauna associated with ephemeral habitats and the functions these habitats maintain in estuarine systems. Given the highly structured morphology of bryozoans and the muddy-bottom seascape of the north-central Gulf of Mexico, we hypothesized that the presence of bryozoans in nearshore waters provides additional temporally and spatially ephemeral habitat for invertebrates, small mobile fishes, or early life-stages of estuarine nekton. We examined seine and trawl samples from a long-term fisheries monitoring program operating within Mississippi Sound, Mississippi to test our hypothesis. Overall, we collected 71 and 85 invertebrate taxa in seine (2012–2017) and trawl (2013–2017) samples, respectively, with 40 taxa in common. We also collected 86 and 74 fish taxa overall in all seine (2012–2017) and trawl (2013–2017) samples, respectively, with 53 taxa in common. We documented highest species richness and species diversity indices when bryozoans were present and in large volumes; however, most of the samples with bryozoans present were collected between September and November. Our results suggest bryozoan mats likely serve as a dispersal mechanism and refugia for estuarine nekton within a soft-sediment seascape as mats pulse shoreward with winds, tides, and currents.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70883614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study we evaluated, in a high-resolution simulation (1.5 km), the separate and combined effects of freshwater discharge management and climate warming by 1 °C on the Loop Current intrusions on the West Florida Shelf (WFS) and its dynamics in the subtropical western Atlantic. Based on a one-year simulation in which a Loop Current and its eddy intruded on the WFS, either the increase of freshwater discharge or the climate warming led to a change in the stratification properties of the West Florida Shelf significant enough to affect the type of Loop Current intrusions. Increased freshwater discharge contributed to the intensification of shelf water mixing that favors surface intrusion of Loop Current waters. On the contrary, 1 °C warming led to increased shelf waters stratification that favors bottom intrusions. Either type of intrusion leads to a different oceanographic regime on the shelf to which the ecosystem might respond differently. Our study suggests, however, that increased freshwater discharge could mitigate the effect of climate warming on the WFS by reducing shelf waters stratification. The WFS response to cold air outbreaks that are common in the fall and winter months was also analyzed. It showed that under a warmer climate, the increased stratification due to the freshwater discharge at the end the boreal summer wet season is cancelled by the warmer climate and reduces the available potential energy on the shelf, limiting coastal upwelling, instabilities, and shelf convection.
{"title":"Effects of climate change and water management on West Florida Shelfʼs dynamics","authors":"L. Chérubin, R. Burgman","doi":"10.5343/bms.2021.0054","DOIUrl":"https://doi.org/10.5343/bms.2021.0054","url":null,"abstract":"In this study we evaluated, in a high-resolution simulation (1.5 km), the separate and combined effects of freshwater discharge management and climate warming by 1 °C on the Loop Current intrusions on the West Florida Shelf (WFS) and its dynamics in the subtropical western Atlantic. Based on a one-year simulation in which a Loop Current and its eddy intruded on the WFS, either the increase of freshwater discharge or the climate warming led to a change in the stratification properties of the West Florida Shelf significant enough to affect the type of Loop Current intrusions. Increased freshwater discharge contributed to the intensification of shelf water mixing that favors surface intrusion of Loop Current waters. On the contrary, 1 °C warming led to increased shelf waters stratification that favors bottom intrusions. Either type of intrusion leads to a different oceanographic regime on the shelf to which the ecosystem might respond differently. Our study suggests, however, that increased freshwater discharge could mitigate the effect of climate warming on the WFS by reducing shelf waters stratification. The WFS response to cold air outbreaks that are common in the fall and winter months was also analyzed. It showed that under a warmer climate, the increased stratification due to the freshwater discharge at the end the boreal summer wet season is cancelled by the warmer climate and reduces the available potential energy on the shelf, limiting coastal upwelling, instabilities, and shelf convection.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70884039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Community-wide understanding of food web dynamics in species-rich tropical estuaries are generally lacking, exacerbating the challenges of managing these valuable coastal habitats. To address this gap, trophic guilds and dietary patterns were elucidated for 39 species of a juvenile-dominated demersal estuarine fish community in the Matang Mangrove Forest Reserve, an Important Marine Mammal Area. Fish were sampled monthly for a year using otter trawl, and stomach contents were analyzed. Of the seven trophic guilds identified from clustering analysis, the three most speciose ones were shrimp feeders (12 species), zooplanktivores (9), and generalist crustacivores (7). Copepods occurred in diets of 50% of all fish species and were the most important food item volumetrically for specialist zooplanktivores. Diverse shrimp and prawn taxa, including commercially valuable Acetes and juvenile penaeids, showed highest frequency of occurrence in stomachs and supported the shrimp feeder and crustacivore guilds that contained relatively more diet generalists. Biomass-dominant annelidivore guild members are known to be a vital food resource for highly threatened coastal cetaceans. Ontogenetic diet shift, wide intra-guild diet breadth, seasonality in major resource use, and prevalence of detritus in diet were feeding strategies that reduced niche overlap and competition among fish species sharing common food resources. Future fisheries management must consider the bottom-up trophic impacts from excessive removal of valuable prey resources such as shrimps on equally valuable fish consumers that depend on them.
{"title":"Trophic guild structure and dietary patterns of a juvenile-dominated demersal fish community in a tropical mangrove estuarine system","authors":"A. Then, V. Chong","doi":"10.5343/bms.2022.0001","DOIUrl":"https://doi.org/10.5343/bms.2022.0001","url":null,"abstract":"Community-wide understanding of food web dynamics in species-rich tropical estuaries are generally lacking, exacerbating the challenges of managing these valuable coastal habitats. To address this gap, trophic guilds and dietary patterns were elucidated for 39 species of a juvenile-dominated demersal estuarine fish community in the Matang Mangrove Forest Reserve, an Important Marine Mammal Area. Fish were sampled monthly for a year using otter trawl, and stomach contents were analyzed. Of the seven trophic guilds identified from clustering analysis, the three most speciose ones were shrimp feeders (12 species), zooplanktivores (9), and generalist crustacivores (7). Copepods occurred in diets of 50% of all fish species and were the most important food item volumetrically for specialist zooplanktivores. Diverse shrimp and prawn taxa, including commercially valuable Acetes and juvenile penaeids, showed highest frequency of occurrence in stomachs and supported the shrimp feeder and crustacivore guilds that contained relatively more diet generalists. Biomass-dominant annelidivore guild members are known to be a vital food resource for highly threatened coastal cetaceans. Ontogenetic diet shift, wide intra-guild diet breadth, seasonality in major resource use, and prevalence of detritus in diet were feeding strategies that reduced niche overlap and competition among fish species sharing common food resources. Future fisheries management must consider the bottom-up trophic impacts from excessive removal of valuable prey resources such as shrimps on equally valuable fish consumers that depend on them.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70884141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Christopher D. Wells, J. D. Muñoz-Maravilla, H. Lasker, P. Edmunds
Despite the importance of historical data in quantifying shifting conditions, information legacies are being lost through oversight and retirement of researchers. We highlight the recovery of two long-term research sites in Caribbean octocoral forests and call for preservation of other legacy sites and associated data before these locations become lost.
{"title":"Information legacies of early ecological studies","authors":"Christopher D. Wells, J. D. Muñoz-Maravilla, H. Lasker, P. Edmunds","doi":"10.5343/bms.2022.0023","DOIUrl":"https://doi.org/10.5343/bms.2022.0023","url":null,"abstract":"Despite the importance of historical data in quantifying shifting conditions, information legacies are being lost through oversight and retirement of researchers. We highlight the recovery of two long-term research sites in Caribbean octocoral forests and call for preservation of other legacy sites and associated data before these locations become lost.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70884628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Associations between banded sea kraits (Laticuadinae) and trumpetfish (Aulostomidae) in the central Philippines","authors":"Kenneth L Materum, P. Sikkel","doi":"10.5343/bms.2022.0044","DOIUrl":"https://doi.org/10.5343/bms.2022.0044","url":null,"abstract":"Lv:0:53:http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral<xhtml:span xmlns:xhtml=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\">2022 Rosenstiel School of Marine, Atmospheric & Earth Science of the University of Miami</xhtml:span>","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70885396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Seyoum, Joel D. Anderson, Damon Williford, Michelle C D Hayes, J. Dutka‐Gianelli, Miguel G Figuerola-Hernandez, Alexis A. Trotter, Ronald G. Taylor, M. Tringali
The species-level taxonomy of fat snooks (Centropomus parallelus and Centropomus mexicanus), which are distributed in coastal waters from Florida to Brazil and parts of the Gulf of Mexico, was explored with mitochondrial DNA 16S rRNA and cytochrome c oxidase subunit 1 sequencing and multilocus microsatellite DNA genotyping. The existence of a novel lineage first observed from Puerto Rico (“Lineage 3”) was confirmed in the presence of specimens of C. parallelus from Florida (Lineage 1), and C. mexicanus from Texas (Lineage 2). The novel lineage was found to be in the same phylogenetic clade as specimens from Brazil, consistent with distribution along the Caribbean coast as far as South America. Lineages 1 and 2 are spatially isolated, with no fat snook reported from Pensacola, Florida to Freeport, Texas. The transition zone between lineages 2 and 3 may occur in the area between the Yucatán Peninsula and western Panama. Sampling from this region is necessary to identify the breakpoint and potential for hybridization. Analysis of sequence data within a maximum likelihood framework revealed that all three lineages form a monophyletic clade within Centropomus, with Lineage 3 as ancestral to the other two lineages. Lineage 3 may have originated in South America and expanded to seed the other two lineages. This expansion is estimated to have occurred 0.9-2.5 million years ago. Lineage 3 individuals occasionally migrate to the Atlantic coast of Florida from the distal area of their distribution range and hybridize with local specimens of Lineage 1, suggesting some overlap in the distribution of these two lineages. Overall, these data suggest a complex underlying phylogenetic history of fat snooks in the western Atlantic, with the potential for future taxonomic revision.
{"title":"A novel allopatric lineage within the fat snook species complex of the genus Centropomus (Perciformes: Centropomidae)","authors":"S. Seyoum, Joel D. Anderson, Damon Williford, Michelle C D Hayes, J. Dutka‐Gianelli, Miguel G Figuerola-Hernandez, Alexis A. Trotter, Ronald G. Taylor, M. Tringali","doi":"10.5343/bms.2022.0007","DOIUrl":"https://doi.org/10.5343/bms.2022.0007","url":null,"abstract":"The species-level taxonomy of fat snooks (Centropomus parallelus and Centropomus mexicanus), which are distributed in coastal waters from Florida to Brazil and parts of the Gulf of Mexico, was explored with mitochondrial DNA 16S rRNA and cytochrome c oxidase subunit 1 sequencing and multilocus microsatellite DNA genotyping. The existence of a novel lineage first observed from Puerto Rico (“Lineage 3”) was confirmed in the presence of specimens of C. parallelus from Florida (Lineage 1), and C. mexicanus from Texas (Lineage 2). The novel lineage was found to be in the same phylogenetic clade as specimens from Brazil, consistent with distribution along the Caribbean coast as far as South America. Lineages 1 and 2 are spatially isolated, with no fat snook reported from Pensacola, Florida to Freeport, Texas. The transition zone between lineages 2 and 3 may occur in the area between the Yucatán Peninsula and western Panama. Sampling from this region is necessary to identify the breakpoint and potential for hybridization. Analysis of sequence data within a maximum likelihood framework revealed that all three lineages form a monophyletic clade within Centropomus, with Lineage 3 as ancestral to the other two lineages. Lineage 3 may have originated in South America and expanded to seed the other two lineages. This expansion is estimated to have occurred 0.9-2.5 million years ago. Lineage 3 individuals occasionally migrate to the Atlantic coast of Florida from the distal area of their distribution range and hybridize with local specimens of Lineage 1, suggesting some overlap in the distribution of these two lineages. Overall, these data suggest a complex underlying phylogenetic history of fat snooks in the western Atlantic, with the potential for future taxonomic revision.","PeriodicalId":55312,"journal":{"name":"Bulletin of Marine Science","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70884495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}