{"title":"Richard W. Heard","authors":"S. LeCroy, Joyce Shaw, C. Rakocinski","doi":"10.18785/gcr.3401.10","DOIUrl":"https://doi.org/10.18785/gcr.3401.10","url":null,"abstract":"Obituary for Dr. Richard W. Heard III (1939-2022)","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"152 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67685042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Piczak, S. Cooke, A. Adams, Lucas P. Griffin, A. Danylchuk, J. Brownscombe
Permit (Trachinotus falcatus) support recreational fisheries in South Florida, and there is limited monitoring to assess population trends. To address this knowledge deficiency, we conducted a survey of Permit anglers and fishing guides to collect local ecological knowledge (LEK) on fisheries trends, focused mainly on the Florida Keys. Respondents indicated a significant decline in Permit fishing quality starting in 1995 and through 2019, with greater declines in the Upper Florida Keys and Biscayne Bay. Further, declines in Permit fishing quality were more pronounced on flats habitats compared to nearshore reefs and shipwrecks. Reduction in Permit body size, an indicator of fisheries overexploitation, was not reported. Specifically, there were no significant reported differences in Permit size across time and regions. Respondents indicated the greatest potential drivers of changes in fishing quality were water quality, boat traffic, and habitat quality. As a species that aggregates on reefs and shipwrecks to spawn but also relies on nearshore flats for foraging, Permit are potentially vulnerable to a wide range of stressors that need to be included in intervention and local fisheries management plans. Given the inherent challenges with implementing biological surveys for Permit, LEK derived from the recreational fishing sector represents an important source of knowledge, notwithstanding the biases that are associated with such approaches.
{"title":"Permit (Trachinotus falcatus) Fishing Quality and Conservation Threats in the Florida Keys: A Recreational Angler and Fishing Guide Survey","authors":"M. Piczak, S. Cooke, A. Adams, Lucas P. Griffin, A. Danylchuk, J. Brownscombe","doi":"10.18785/gcr.3401.03","DOIUrl":"https://doi.org/10.18785/gcr.3401.03","url":null,"abstract":"Permit (Trachinotus falcatus) support recreational fisheries in South Florida, and there is limited monitoring to assess population trends. To address this knowledge deficiency, we conducted a survey of Permit anglers and fishing guides to collect local ecological knowledge (LEK) on fisheries trends, focused mainly on the Florida Keys. Respondents indicated a significant decline in Permit fishing quality starting in 1995 and through 2019, with greater declines in the Upper Florida Keys and Biscayne Bay. Further, declines in Permit fishing quality were more pronounced on flats habitats compared to nearshore reefs and shipwrecks. Reduction in Permit body size, an indicator of fisheries overexploitation, was not reported. Specifically, there were no significant reported differences in Permit size across time and regions. Respondents indicated the greatest potential drivers of changes in fishing quality were water quality, boat traffic, and habitat quality. As a species that aggregates on reefs and shipwrecks to spawn but also relies on nearshore flats for foraging, Permit are potentially vulnerable to a wide range of stressors that need to be included in intervention and local fisheries management plans. Given the inherent challenges with implementing biological surveys for Permit, LEK derived from the recreational fishing sector represents an important source of knowledge, notwithstanding the biases that are associated with such approaches.","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67684758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shrimp Black Gill, caused by the apostome ciliate Hyalophysa lynni, is an emerging disease impacting penaeid shrimp populations along the southeast Atlantic Coast and the Gulf of Mexico (GOM). Changing annual environmental conditions may drive infection levels of this parasitic ciliate in these populations, which comprise one of the largest fisheries in the United States. Hyalophysa lynni is established on the Texas Gulf Coast, and prevalence of this parasite has a strong seasonal and spatial trend, likely linked with high temperature and a wide range of estuarine salinities. Texas Parks and Wildlife Department monitored shrimp black gill in 2 penaeid shrimp species, Litopenaeus setiferus and Farfantepenaeus aztecus in 2019, with the aim of observing trends in prevalence along spatial and temporal scales. Hyalophysa lynni was found in all 7 bay systems throughout the study period, and this study is a continuation of that monitoring effort, adding 2 years of data collection (2020 and 2021) to prior research. Throughout the entire sampling period (2019–2021) and coastwide, H. lynni was found in 66% of all shrimp samples collected, although prevalence varied annually. Boosted regression tree modeling indicated that low salinity, high temperature, and time of year (late spring through fall) had a significant relationship with H. lynni prevalence in shrimp along the Texas Gulf Coast. Shrimp Black Gill is likely to continue to be present in GOM shrimp populations, and annual precipitation events and increased water temperatures may amplify the population morbidity within any given year.
{"title":"Multi-Year Environmental Trends of Shrimp Black Gill (Hyalophysa lynni) Prevalence in Texas Gulf Coast Shrimp Populations","authors":"Jillian L. Swinford, Joel D. Anderson","doi":"10.18785/gcr.3401.08","DOIUrl":"https://doi.org/10.18785/gcr.3401.08","url":null,"abstract":"Shrimp Black Gill, caused by the apostome ciliate Hyalophysa lynni, is an emerging disease impacting penaeid shrimp populations along the southeast Atlantic Coast and the Gulf of Mexico (GOM). Changing annual environmental conditions may drive infection levels of this parasitic ciliate in these populations, which comprise one of the largest fisheries in the United States. Hyalophysa lynni is established on the Texas Gulf Coast, and prevalence of this parasite has a strong seasonal and spatial trend, likely linked with high temperature and a wide range of estuarine salinities. Texas Parks and Wildlife Department monitored shrimp black gill in 2 penaeid shrimp species, Litopenaeus setiferus and Farfantepenaeus aztecus in 2019, with the aim of observing trends in prevalence along spatial and temporal scales. Hyalophysa lynni was found in all 7 bay systems throughout the study period, and this study is a continuation of that monitoring effort, adding 2 years of data collection (2020 and 2021) to prior research. Throughout the entire sampling period (2019–2021) and coastwide, H. lynni was found in 66% of all shrimp samples collected, although prevalence varied annually. Boosted regression tree modeling indicated that low salinity, high temperature, and time of year (late spring through fall) had a significant relationship with H. lynni prevalence in shrimp along the Texas Gulf Coast. Shrimp Black Gill is likely to continue to be present in GOM shrimp populations, and annual precipitation events and increased water temperatures may amplify the population morbidity within any given year.","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67685081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"We have an Impact Factor!","authors":"Mark C. E. Peterson, N. Brown‐Peterson","doi":"10.18785/gcr.3401.09","DOIUrl":"https://doi.org/10.18785/gcr.3401.09","url":null,"abstract":"","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67685269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Platyischopidae Barnard & Drummond, 1979 represents an amphipod family with 10 genera and 18 species documented as benthic organisms inhabiting from shallow to deep–sea ecosystems worldwide. During 1965, the oceanographic expedition Kovaliewsky— Academic—RV was carried out in the southern Gulf of Mexico (GOM), Straits of Florida, and SW—NE Cuba. Several shallow and deep—sea benthic samples were collected from soft bottoms. From1966 through 2000, a few manuscripts were published regarding benthic invertebrates collected from this expedition, however, other data remain unreported. The present work describes and illustrates in detail a new deep water platyischnopid amphipod species of the genus Tiburonella Thomas & Barnard, 1983, collected from bathyal soft bottoms of the Bay of Campeche, GOM at 2,321 m. Additionally, a dichotomous key for identification of the only 3 known Tiburonella species worldwide is provided.
{"title":"First Record of the Genus Tiburnella Thomas & Barnard, 1983 (Amphipoda, Platyischnopidae) from the Deep-Sea Gulf of Mexico, with the Description of a New Species","authors":"M. Ortiz, I. Winfield","doi":"10.18785/gcr.3401.04","DOIUrl":"https://doi.org/10.18785/gcr.3401.04","url":null,"abstract":"Platyischopidae Barnard & Drummond, 1979 represents an amphipod family with 10 genera and 18 species documented as benthic organisms inhabiting from shallow to deep–sea ecosystems worldwide. During 1965, the oceanographic expedition Kovaliewsky— Academic—RV was carried out in the southern Gulf of Mexico (GOM), Straits of Florida, and SW—NE Cuba. Several shallow and deep—sea benthic samples were collected from soft bottoms. From1966 through 2000, a few manuscripts were published regarding benthic invertebrates collected from this expedition, however, other data remain unreported. The present work describes and illustrates in detail a new deep water platyischnopid amphipod species of the genus Tiburonella Thomas & Barnard, 1983, collected from bathyal soft bottoms of the Bay of Campeche, GOM at 2,321 m. Additionally, a dichotomous key for identification of the only 3 known Tiburonella species worldwide is provided.","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67684879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eastern oyster (Crassostrea virginica) reefs offer vital ecosystem services and support economically and culturally important fisheries. However, environmental and anthropogenic stressors have led to significant decline in oyster reef coverage globally and locally in places like the Suwannee Sound in Florida, USA. Current monitoring methods are insufficient for timely and accurate assessment of oyster resources in the region. Here we demonstrate how drone imagery can be used to delineate intertidal oyster reef coverage rapidly and reliably. The high spatial resolution offered by drone imagery enables accurate delineations. We use a segmentation algorithm to delineate reefs, which produces consistently detailed outlines that are more representative of reef morphology than manual delineations. In total, 1,394 reefs were delineated, which corresponds with 497, 670 m2 of reef area. Of the delineated reefs, 236 (17%) were newly mapped, aligning with 19,848 m2 of newly mapped intertidal oyster reef habitat. The overlapping drone imagery also enabled the production of digital surface models, which were used to calculate volume to area ratio as an indicator of reef condition. These delineations and features serve as accurate baseline data that can be compared to future surveys to monitor how reefs are changing over time in the Suwannee Sound. These methods can also be expanded to other geographical areas and can aid in identifying early signs of decline in oyster reefs.
{"title":"Using Drone Imagery to Map Intertidal Oyster Reefs along Florida’s Gulf of Mexico Coast","authors":"Michael Espriella, Vincent Lecours","doi":"10.18785/gcr.3401.14","DOIUrl":"https://doi.org/10.18785/gcr.3401.14","url":null,"abstract":"Eastern oyster (Crassostrea virginica) reefs offer vital ecosystem services and support economically and culturally important fisheries. However, environmental and anthropogenic stressors have led to significant decline in oyster reef coverage globally and locally in places like the Suwannee Sound in Florida, USA. Current monitoring methods are insufficient for timely and accurate assessment of oyster resources in the region. Here we demonstrate how drone imagery can be used to delineate intertidal oyster reef coverage rapidly and reliably. The high spatial resolution offered by drone imagery enables accurate delineations. We use a segmentation algorithm to delineate reefs, which produces consistently detailed outlines that are more representative of reef morphology than manual delineations. In total, 1,394 reefs were delineated, which corresponds with 497, 670 m2 of reef area. Of the delineated reefs, 236 (17%) were newly mapped, aligning with 19,848 m2 of newly mapped intertidal oyster reef habitat. The overlapping drone imagery also enabled the production of digital surface models, which were used to calculate volume to area ratio as an indicator of reef condition. These delineations and features serve as accurate baseline data that can be compared to future surveys to monitor how reefs are changing over time in the Suwannee Sound. These methods can also be expanded to other geographical areas and can aid in identifying early signs of decline in oyster reefs.","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134889954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Identifying Stable Isotope Patterns among Taxa, Sites, and Environmental Variables in the Eastern Mississippi Sound","authors":"Evan Marth, C. Cloyed, R. Carmichael","doi":"10.18785/gcr.3401.02","DOIUrl":"https://doi.org/10.18785/gcr.3401.02","url":null,"abstract":"","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67684732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Laura Yarbro, Paul Carlson, Ken Heck, Dorothy Byron, Sandra Brooke, Linda Fitzhugh, Sheila Scolaro, Barbara Albrecht, Rachel Presley, Jane Caffrey
Thalassia testudinum often dominates seagrass meadows of the Florida panhandle but few measurements of productivity, biomass, density, turnover or leaf area index in this region have been made. We targeted 5 estuaries located at similar latitudes, 30⁰ ± 0.3⁰N: Big Lagoon, Santa Rosa Sound, St. Andrew Bay, St. Joseph Bay, and St. George Sound. This study was one component of a collaborative partnership of state and local researchers examining factors preventing recovery in panhandle estuarine areas that had historically contained seagrass in the 1940s and 1950s. Measurements were made twice in 2016, once in June and then again in summer or fall, except in Santa Rosa Sound where measurements were made 3 times. In the estuaries sampled for the second time in July or August, aboveground productivity was greater than in June. St. Joseph Bay had the highest aboveground productivity (4.3 g/m2/d) and 1—sided leaf area index (4.2) while St. George Sound had the lowest values (0.41 g/m2/d and 1.0). Principal component analysis suggested that St. Andrew Bay, Big Lagoon and Santa Rosa Sound were the most similar, with higher values for shoot densities and leaf turnover and lower salinities and watershed:water ratios. St. Joseph Bay had high aboveground productivity and salinity, and low turbidity. St. George Sound had low aboveground productivity, high total suspended solids and the highest watershed:water ratio. These baseline productivity estimates will be useful to assess the success of restoration efforts targeting seagrasses in the Florida panhandle and evaluate impacts of climate change on seagrasses.
{"title":"Biomass and Productivity of Thalassia testudinum in Estuaries of the Florida Panhandle","authors":"Laura Yarbro, Paul Carlson, Ken Heck, Dorothy Byron, Sandra Brooke, Linda Fitzhugh, Sheila Scolaro, Barbara Albrecht, Rachel Presley, Jane Caffrey","doi":"10.18785/gcr.3401.11","DOIUrl":"https://doi.org/10.18785/gcr.3401.11","url":null,"abstract":"Thalassia testudinum often dominates seagrass meadows of the Florida panhandle but few measurements of productivity, biomass, density, turnover or leaf area index in this region have been made. We targeted 5 estuaries located at similar latitudes, 30⁰ ± 0.3⁰N: Big Lagoon, Santa Rosa Sound, St. Andrew Bay, St. Joseph Bay, and St. George Sound. This study was one component of a collaborative partnership of state and local researchers examining factors preventing recovery in panhandle estuarine areas that had historically contained seagrass in the 1940s and 1950s. Measurements were made twice in 2016, once in June and then again in summer or fall, except in Santa Rosa Sound where measurements were made 3 times. In the estuaries sampled for the second time in July or August, aboveground productivity was greater than in June. St. Joseph Bay had the highest aboveground productivity (4.3 g/m2/d) and 1—sided leaf area index (4.2) while St. George Sound had the lowest values (0.41 g/m2/d and 1.0). Principal component analysis suggested that St. Andrew Bay, Big Lagoon and Santa Rosa Sound were the most similar, with higher values for shoot densities and leaf turnover and lower salinities and watershed:water ratios. St. Joseph Bay had high aboveground productivity and salinity, and low turbidity. St. George Sound had low aboveground productivity, high total suspended solids and the highest watershed:water ratio. These baseline productivity estimates will be useful to assess the success of restoration efforts targeting seagrasses in the Florida panhandle and evaluate impacts of climate change on seagrasses.","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134890187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Miocene sediments of 2 deep—water boreholes from the northern Gulf of Mexico, from Alaminos Canyon (AC) Block 627 and Mississippi Canyon (MC) Block 555, have been biostratigraphically analyzed using calcareous nannofossils, revealing changes in sedimentation rates and depositional environments between these 2 areas. High nannofossil abundance values and low sedimentation rates generally recorded in the Alaminos Canyon region suggest a condensed section during much of the Miocene, associated with a basinal environment. Mississippi Canyon exhibits lower nannofossil abundance and higher sedimentation rates compared to Alaminos Canyon during the majority of the Miocene. Increased sediment volumes are largely attributed to input from the Mississippi River. Sedimentation rate was calculated for both sites. In the AC Block 627 borehole, sedimentation rate ranged from 13 to 107 m/million years (my), and in the MC Block 555 borehole, it varied from 11 to 914 m/my. One major anomaly was a low observed sedimentation rate in the lowest portion of the section at MC Block 555, in the interval defined between the extinctions of Triquetrorhabdulus carinatus and Dictyococcites bisectus. This may reflect a hiatus or possible fault which has shortened the section.
{"title":"A Miocene Nannofossil Biostratigraphic Case Study: Alaminos Canyon Block 627 and Mississippi Canyon Block 555, and Sedimentation Rates in the Gulf of Mexico","authors":"Bethany Cobb Faulk, Murlene Clark","doi":"10.18785/gcr.3401.13","DOIUrl":"https://doi.org/10.18785/gcr.3401.13","url":null,"abstract":"The Miocene sediments of 2 deep—water boreholes from the northern Gulf of Mexico, from Alaminos Canyon (AC) Block 627 and Mississippi Canyon (MC) Block 555, have been biostratigraphically analyzed using calcareous nannofossils, revealing changes in sedimentation rates and depositional environments between these 2 areas. High nannofossil abundance values and low sedimentation rates generally recorded in the Alaminos Canyon region suggest a condensed section during much of the Miocene, associated with a basinal environment. Mississippi Canyon exhibits lower nannofossil abundance and higher sedimentation rates compared to Alaminos Canyon during the majority of the Miocene. Increased sediment volumes are largely attributed to input from the Mississippi River. Sedimentation rate was calculated for both sites. In the AC Block 627 borehole, sedimentation rate ranged from 13 to 107 m/million years (my), and in the MC Block 555 borehole, it varied from 11 to 914 m/my. One major anomaly was a low observed sedimentation rate in the lowest portion of the section at MC Block 555, in the interval defined between the extinctions of Triquetrorhabdulus carinatus and Dictyococcites bisectus. This may reflect a hiatus or possible fault which has shortened the section.","PeriodicalId":36764,"journal":{"name":"GULF AND CARIBBEAN RESEARCH","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135152849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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