Fish community and habitat of the estuarine channel connecting to the sea at Laguna Larga were characterized before and after the dredging conducted in 2012. For this purpose, the channel was divided into four sections: two initial sections near the sea (IA, IB) and two final sections near the lagoon (FA, FB). A total of 112 visual surveys were conducted by free diving. Shelter area, shade, water temperature, salinity, as well as current depth and velocity were measured in order to characterize the habitat. Spatial and temporal distribution of fish, species richness, density, and relative frequency were determined in each section, and results were related to habitat characteristics. A total of 22 species of fish distributed in 14 families were recorded. The following were the dominant species: Abudefduf saxatilis, Halichoeres bivittatus, Stegastes leucostictus, and Lutjanus griseus. Fish density and richness were higher at the beginning of the channel than at the end, particularly Lutjanus griseus, which changed its niche preferences from the end of the channel (FB) to the beginning (IB). In addition, fish communities varied spatially and temporally. The restoration process resulted in decreased availability of shelter and consequently determined the decrease in density and species richness at the beginning of the channel. The most drastic changes in fish spatial and temporal pattern were associated with the final sections of the canal, which suffered the greatest changes in habitat.
{"title":"Efecto del dragado de un canal de comunicación al mar (estero) sobre la asociación de peces en la Laguna Larga, Cayo Coco, Cuba","authors":"Lisadys B. Dulce Sotolongo, Fabián Pina Amargós","doi":"10.15359/revmar.9-2.2","DOIUrl":"https://doi.org/10.15359/revmar.9-2.2","url":null,"abstract":"Fish community and habitat of the estuarine channel connecting to the sea at Laguna Larga were characterized before and after the dredging conducted in 2012. For this purpose, the channel was divided into four sections: two initial sections near the sea (IA, IB) and two final sections near the lagoon (FA, FB). A total of 112 visual surveys were conducted by free diving. Shelter area, shade, water temperature, salinity, as well as current depth and velocity were measured in order to characterize the habitat. Spatial and temporal distribution of fish, species richness, density, and relative frequency were determined in each section, and results were related to habitat characteristics. A total of 22 species of fish distributed in 14 families were recorded. The following were the dominant species: Abudefduf saxatilis, Halichoeres bivittatus, Stegastes leucostictus, and Lutjanus griseus. Fish density and richness were higher at the beginning of the channel than at the end, particularly Lutjanus griseus, which changed its niche preferences from the end of the channel (FB) to the beginning (IB). In addition, fish communities varied spatially and temporally. The restoration process resulted in decreased availability of shelter and consequently determined the decrease in density and species richness at the beginning of the channel. The most drastic changes in fish spatial and temporal pattern were associated with the final sections of the canal, which suffered the greatest changes in habitat.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"29-50"},"PeriodicalIF":0.2,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47071030","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}
R. Gómez-Ortega, G. D. L. Lanza-Espino, Cristian Tovilla-Hernández, E. Barba-Macías, J. Valle-Mora, Ofelia Castañeda-López, Eduardo Ramos-Santiago
La eutrofizacion es el proceso de enriquecimiento del agua por nutrientes, que estimula un incremento en la productividad primaria y frecuentemente esta relacionado con las proliferaciones de algas nocivas y con las condiciones de hipoxia/anoxia. Este fenomeno, asociado al incremento de la presion antropogenica, se ha convertido en un fenomeno de proporciones globales, por lo que se han realizado diversos esfuerzos para su deteccion y control. El presente estudio tuvo como objeto analizar la variacion espacio-temporal del sistema estuarino Chantuto-Panzacola, tomando en cuenta registros de mas de dos decadas anteriores (1990-2009), y su condicion fisicoquimica actual (2015-2016). Se aplicaron y desarrollaron indices troficos y ecologicos a las condiciones tropicales, asi como su variacion a lo largo del periodo de analisis. La cuantificacion y el analisis de los parametros fisicoquimicos e indices troficos determinaron que existen cambios en su patron anual a partir del 2008, determinada principalmente por los nitratos mas nitritos. Sin embargo, en el ultimo ano se observo un mayor predominio del amonio. En todos los nutrientes, comparando poco mas de 25 anos, se obtuvieron concentraciones mayores en los ultimos periodos, cuyas concentraciones aumentaron mas del 90% su promedio anual. La aplicacion de los indices troficos corroboro un activo proceso de eutrofizacion a partir del ano 2008, con enfasis en las lagunas de Chantuto, Cerritos y Panzacola, debido al constante aporte de nutrientes proveniente de los rios adyacentes que contribuyen al aumento de nitrogeno y fosforo.
{"title":"Cambios ambientales y tróficos a través de un análisis a largo plazo del sistema lagunar Chantuto-Panzacola, Chiapas, México","authors":"R. Gómez-Ortega, G. D. L. Lanza-Espino, Cristian Tovilla-Hernández, E. Barba-Macías, J. Valle-Mora, Ofelia Castañeda-López, Eduardo Ramos-Santiago","doi":"10.15359/REVMAR.9-2.4","DOIUrl":"https://doi.org/10.15359/REVMAR.9-2.4","url":null,"abstract":"La eutrofizacion es el proceso de enriquecimiento del agua por nutrientes, que estimula un incremento en la productividad primaria y frecuentemente esta relacionado con las proliferaciones de algas nocivas y con las condiciones de hipoxia/anoxia. Este fenomeno, asociado al incremento de la presion antropogenica, se ha convertido en un fenomeno de proporciones globales, por lo que se han realizado diversos esfuerzos para su deteccion y control. El presente estudio tuvo como objeto analizar la variacion espacio-temporal del sistema estuarino Chantuto-Panzacola, tomando en cuenta registros de mas de dos decadas anteriores (1990-2009), y su condicion fisicoquimica actual (2015-2016). Se aplicaron y desarrollaron indices troficos y ecologicos a las condiciones tropicales, asi como su variacion a lo largo del periodo de analisis. La cuantificacion y el analisis de los parametros fisicoquimicos e indices troficos determinaron que existen cambios en su patron anual a partir del 2008, determinada principalmente por los nitratos mas nitritos. Sin embargo, en el ultimo ano se observo un mayor predominio del amonio. En todos los nutrientes, comparando poco mas de 25 anos, se obtuvieron concentraciones mayores en los ultimos periodos, cuyas concentraciones aumentaron mas del 90% su promedio anual. La aplicacion de los indices troficos corroboro un activo proceso de eutrofizacion a partir del ano 2008, con enfasis en las lagunas de Chantuto, Cerritos y Panzacola, debido al constante aporte de nutrientes proveniente de los rios adyacentes que contribuyen al aumento de nitrogeno y fosforo.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"75-100"},"PeriodicalIF":0.2,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47330992","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 Terraba-Sierpe National Wetlands (HNTS) is the largest wetland in Costa Rica, located in the South-Eastern part of the country between the geographical coordinates 8° 47” North Latitude and 83° 38” West Longitude. It is comprised of the Terraba-Sierpe delta, which is covered with dense mangrove vegetation that has been modified for over six decades for agricultural land uses. This paper was aimed at studying land use and cover changes of the Terraba-Sierpe National Wetlands based on the interpretation of aerial photographs and a satellite image, as well as field corroboration to understand the trends during the 64 years of analysis associated with climatic, geomorphological, and anthropic patterns. A net periodic loss by deforestation was determined between 1948 and 2012 exceeding 2 562.79 ha, with an annual net loss of 40 ha per year. This paper helped to generate a baseline in the analysis of land use and cover changes in the Terraba-Sierpe Wetlands, quantify the anthropic impact on the mangrove and adjacent areas over 40 years, and evidence the good decisions made in terms of environmental legislation during the 1990s for the protection of these fragile ecosystems.
{"title":"Cambios en el uso y cobertura de la tierra entre 1948 y 2012 en el Humedal Nacional Térraba-Sierpe, Costa Rica","authors":"J. F. Acuña-Piedra, Adolfo Quesada-Román","doi":"10.15359/REVMAR.9-2.1","DOIUrl":"https://doi.org/10.15359/REVMAR.9-2.1","url":null,"abstract":"The Terraba-Sierpe National Wetlands (HNTS) is the largest wetland in Costa Rica, located in the South-Eastern part of the country between the geographical coordinates 8° 47” North Latitude and 83° 38” West Longitude. It is comprised of the Terraba-Sierpe delta, which is covered with dense mangrove vegetation that has been modified for over six decades for agricultural land uses. This paper was aimed at studying land use and cover changes of the Terraba-Sierpe National Wetlands based on the interpretation of aerial photographs and a satellite image, as well as field corroboration to understand the trends during the 64 years of analysis associated with climatic, geomorphological, and anthropic patterns. A net periodic loss by deforestation was determined between 1948 and 2012 exceeding 2 562.79 ha, with an annual net loss of 40 ha per year. This paper helped to generate a baseline in the analysis of land use and cover changes in the Terraba-Sierpe Wetlands, quantify the anthropic impact on the mangrove and adjacent areas over 40 years, and evidence the good decisions made in terms of environmental legislation during the 1990s for the protection of these fragile ecosystems.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"9-28"},"PeriodicalIF":0.2,"publicationDate":"2017-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15359/REVMAR.9-2.1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66946295","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}
La depredacion de cefalopodos por parte de aves no marinas es rara, sobre todo en aves del orden Accipitriformes. Las observaciones se llevaron a cabo in situ y la identificacion de Argonauta nouryi fue completamente basada en la forma de la concha. Se registra por primera vez la depredacion del nautilo de papel, A. nouryi , por el Gavilan Cangrejo, Buteogallus anthracinus , en el Sector Murcielago del Parque Nacional Santa Rosa, Guanacaste, Costa Rica, lo cual representa la primera ave conocida depredadora de esta especie en el pais.
{"title":"First record of predation of the paper nautilus Argonauta nouryi (Cephalopoda: Argonautidae) by the Common Black Hawk Buteogallus anthracinus (Accipitriformes: Accipitridae)","authors":"Federico Herrera, Mónica González","doi":"10.15359/REVMAR.9-1.5","DOIUrl":"https://doi.org/10.15359/REVMAR.9-1.5","url":null,"abstract":"La depredacion de cefalopodos por parte de aves no marinas es rara, sobre todo en aves del orden Accipitriformes. Las observaciones se llevaron a cabo in situ y la identificacion de Argonauta nouryi fue completamente basada en la forma de la concha. Se registra por primera vez la depredacion del nautilo de papel, A. nouryi , por el Gavilan Cangrejo, Buteogallus anthracinus , en el Sector Murcielago del Parque Nacional Santa Rosa, Guanacaste, Costa Rica, lo cual representa la primera ave conocida depredadora de esta especie en el pais.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"85-89"},"PeriodicalIF":0.2,"publicationDate":"2017-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15359/REVMAR.9-1.5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48476821","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}
Pedro Cervantes-Hernández, Eduardo Pérez-Vives, Mario Alejandro Gómez-Ponce
Desde 1959, en el Pacifico mexicano, la explotacion de Lepidochelys olivacea no se ha evaluado y en la Playa Escobilla, la temporada de arribada esta parcialmente documentada. Los temas mencionados fueron analizados con los metodos recomendados en la bibliografia (analisis de la mortalidad y series de tiempo) y para ello, se uso una base de datos de captura total de enero del ano 1978 a mayo del ano 1990. Se encontraron tendencias netas descendentes en la abundancia de machos y hembras, concluyendo que esta poblacion fue sobreexplotada en el periodo en estudio. La mortalidad natural fue muy baja en comparacion con la mortalidad por pesca, y esta ultima afecto a ambos sexos con la misma intensidad. Una temporada completa de arribada se delimito de agosto a enero, con el maximo de abundancia en noviembre. Con base en la bibliografia se encontro que en el Golfo de Tehuantepec (GT), la temporada de arribada transcurrio al mismo tiempo que la temporada reproductiva del camaron cafe Farfantepenaeus californiensis (de julio a febrero, con maximo desove entre octubre y noviembre). En el GT la temporada de pesca del recurso camaron es de septiembre/octubre a marzo/abril, abarcando completamente la temporada de arribada. La accion conjunta de las pesquerias de tortugas marinas (aqui explicada) y del recurso camaron provoco la sobreexplotacion de L. olivacea. La pesqueria del recurso camaron hizo de L. olivacea una especie comun en la fauna de acompanamiento; por esta razon, antes y en el presente, los excluidores continuan utilizandose.
{"title":"Arribada y explotación de la tortuga golfina en la Playa Escobilla, Oaxaca, México","authors":"Pedro Cervantes-Hernández, Eduardo Pérez-Vives, Mario Alejandro Gómez-Ponce","doi":"10.15359/REVMAR.9-1.6","DOIUrl":"https://doi.org/10.15359/REVMAR.9-1.6","url":null,"abstract":"Desde 1959, en el Pacifico mexicano, la explotacion de Lepidochelys olivacea no se ha evaluado y en la Playa Escobilla, la temporada de arribada esta parcialmente documentada. Los temas mencionados fueron analizados con los metodos recomendados en la bibliografia (analisis de la mortalidad y series de tiempo) y para ello, se uso una base de datos de captura total de enero del ano 1978 a mayo del ano 1990. Se encontraron tendencias netas descendentes en la abundancia de machos y hembras, concluyendo que esta poblacion fue sobreexplotada en el periodo en estudio. La mortalidad natural fue muy baja en comparacion con la mortalidad por pesca, y esta ultima afecto a ambos sexos con la misma intensidad. Una temporada completa de arribada se delimito de agosto a enero, con el maximo de abundancia en noviembre. Con base en la bibliografia se encontro que en el Golfo de Tehuantepec (GT), la temporada de arribada transcurrio al mismo tiempo que la temporada reproductiva del camaron cafe Farfantepenaeus californiensis (de julio a febrero, con maximo desove entre octubre y noviembre). En el GT la temporada de pesca del recurso camaron es de septiembre/octubre a marzo/abril, abarcando completamente la temporada de arribada. La accion conjunta de las pesquerias de tortugas marinas (aqui explicada) y del recurso camaron provoco la sobreexplotacion de L. olivacea. La pesqueria del recurso camaron hizo de L. olivacea una especie comun en la fauna de acompanamiento; por esta razon, antes y en el presente, los excluidores continuan utilizandose.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"91-107"},"PeriodicalIF":0.2,"publicationDate":"2017-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15359/REVMAR.9-1.6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43995423","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}
En el proceso de toma de decisiones para el manejo de pesquerias se ha incrementado la atencion en considerar aspectos de la dimension humana de la pesca adicionalmente a la dimension ecologica. En la dimension humana, el componente de dinamica de flotas pesqueras se ha analizado a traves de modelos y teorias que han dado mas enfasis al comportamiento de embarcaciones y menor atencion al comportamiento del pescador como individuo o grupos de individuos. La presente revision de literatura se enfoca en estudios que han analizado aspectos de la conducta del pescador mediante teorias y modelos que logran explicar y predecir su comportamiento. Se encontro que los motivadores economicos per se no logran explicar la complejidad del proceso de toma de decisiones del pescador, mas bien una gran cantidad de aspectos no monetarios estan implicitos en las elecciones que hacen los pescadores en el corto y largo plazos. Modelos que incorporan informacion de distintas disciplinas y enfoques transdisciplinarios logran explicar mejor las decisiones del pescador asociadas al esfuerzo, incentivos economicos, capturas, regulaciones, aspectos de su cultura, forma de vida, estrategias de sobrevivencia, satisfaccion laboral y percepcion del bienestar. A partir de esta revision de literatura se propone un marco conceptual de manejo socioecologico para integrar las motivaciones de la conducta de los pescadores y la relacion con los ecosistemas de los cuales estos dependen.
{"title":"Artículo de Revisión/ Review Article Teorías y modelos aplicados al estudio de la conducta del pescador: implicaciones en procesos de gestión","authors":"Helven Naranjo-Madrigal","doi":"10.15359/REVMAR.9-1.4","DOIUrl":"https://doi.org/10.15359/REVMAR.9-1.4","url":null,"abstract":"En el proceso de toma de decisiones para el manejo de pesquerias se ha incrementado la atencion en considerar aspectos de la dimension humana de la pesca adicionalmente a la dimension ecologica. En la dimension humana, el componente de dinamica de flotas pesqueras se ha analizado a traves de modelos y teorias que han dado mas enfasis al comportamiento de embarcaciones y menor atencion al comportamiento del pescador como individuo o grupos de individuos. La presente revision de literatura se enfoca en estudios que han analizado aspectos de la conducta del pescador mediante teorias y modelos que logran explicar y predecir su comportamiento. Se encontro que los motivadores economicos per se no logran explicar la complejidad del proceso de toma de decisiones del pescador, mas bien una gran cantidad de aspectos no monetarios estan implicitos en las elecciones que hacen los pescadores en el corto y largo plazos. Modelos que incorporan informacion de distintas disciplinas y enfoques transdisciplinarios logran explicar mejor las decisiones del pescador asociadas al esfuerzo, incentivos economicos, capturas, regulaciones, aspectos de su cultura, forma de vida, estrategias de sobrevivencia, satisfaccion laboral y percepcion del bienestar. A partir de esta revision de literatura se propone un marco conceptual de manejo socioecologico para integrar las motivaciones de la conducta de los pescadores y la relacion con los ecosistemas de los cuales estos dependen.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"61-84"},"PeriodicalIF":0.2,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48486179","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}
Lourdes Pastor Gutiérrez, Daril de la Nuez Hernández, R. C. Wong, Yuliet Piloto Cubero, A. Angulo
Seahorses are ornamental fish of great interest for exhibits in the Cuban National Aquarium; therefore, the current state of natural populations of the species Hippocampus reidi (Ginsburg, 1933) and Hippocampus erectus (Perry, 1810) was assessed in different areas in the north coast of western and central regions in Cuba. Visual censuses were conducted by free diving, using the linear transects method, between March 2007 and March 2010. Means were compared using Kruskal-Wallis and Mann-Whitney U tests. The largest densities were found in the artificial structures in the Barracuda and Caleta stations, probably due to the large number of anchor sites and eutrophication. No differences were recorded in this variable for either species between the rainy and dry seasons. H. reidi was the most abundant species and the most widely distributed. Although the density of seahorse individuals is generally low, the marked shortage of H. erectus specimens may have been due to the sampling method (maximum depth 2 meters). There were more males than females in both species. H. reidi reproduced all year long and the sexual ratio recorded was very similar to 1:1 ratio, while, in H. erectus, this variable was different than expected. Macroalgae of the genus Caulerpa was the substrate most widely used by both species.
{"title":"Caracterización de las poblaciones de caballitos de mar en diferentes zonas de la costa norte de las regiones occidental y central de Cuba","authors":"Lourdes Pastor Gutiérrez, Daril de la Nuez Hernández, R. C. Wong, Yuliet Piloto Cubero, A. Angulo","doi":"10.15359/REVMAR.9-1.2","DOIUrl":"https://doi.org/10.15359/REVMAR.9-1.2","url":null,"abstract":"Seahorses are ornamental fish of great interest for exhibits in the Cuban National Aquarium; therefore, the current state of natural populations of the species Hippocampus reidi (Ginsburg, 1933) and Hippocampus erectus (Perry, 1810) was assessed in different areas in the north coast of western and central regions in Cuba. Visual censuses were conducted by free diving, using the linear transects method, between March 2007 and March 2010. Means were compared using Kruskal-Wallis and Mann-Whitney U tests. The largest densities were found in the artificial structures in the Barracuda and Caleta stations, probably due to the large number of anchor sites and eutrophication. No differences were recorded in this variable for either species between the rainy and dry seasons. H. reidi was the most abundant species and the most widely distributed. Although the density of seahorse individuals is generally low, the marked shortage of H. erectus specimens may have been due to the sampling method (maximum depth 2 meters). There were more males than females in both species. H. reidi reproduced all year long and the sexual ratio recorded was very similar to 1:1 ratio, while, in H. erectus, this variable was different than expected. Macroalgae of the genus Caulerpa was the substrate most widely used by both species.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"23-39"},"PeriodicalIF":0.2,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15359/REVMAR.9-1.2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42407760","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}
Under the regional coordination of OSPESCA (Central America Fisheries and Aquaculture Organization), an exploratory fishing survey campaign on the continental shelf and slope of the Central American Caribbean was conducted from January 3rd to February 3rd, 2011 on board the Miguel Oliver R/V. Temperature and salinity were determined in 76 hydrographic stations, and chlorophyll a concentration was estimated using a CTD fluorometer. Surface temperature ranged between 25°C and 27°C and salinity at that same level was between 32.5 (Panama) and 35.5 (Belize). The thermocline depth showed a descending tendency from south to north between 140 and 155 m. Chlorophyll a concentration ranged between 0.01 and 1.01 mg m-3. The distribution of chlorophyll a in the 0 to 150 m layer was the highest in Panama (25.25 mg m-2) and the lowest in Belize (6.05 mg m-2). Two chlorophyll a maximums (mixing layer and thermocline layer) characterize the southern area of the Central American Caribbean (Costa Rica and Panama), while only one maximum close to 90 m stands out in the vertical distribution of that variable between Nicaragua and Belize. Average chlorophyll a concentration for all stations was 0.3 mg m-3; therefore, in general oligotrophic conditions stand out in the continental shelf and slope.
在中美洲渔业和水产养殖组织（OSPESCA）的区域协调下，2011年1月3日至2月3日，Miguel Oliver R/V号在中美洲加勒比大陆架和斜坡上进行了一次探索性捕鱼调查活动。在76个水文站测定了温度和盐度，并使用CTD荧光计估算了叶绿素a浓度。地表温度在25°C到27°C之间，同一水平的盐度在32.5（巴拿马）到35.5（伯利兹）之间。温跃层深度在140至155米之间呈现自南向北下降的趋势。叶绿素a浓度在0.01至1.01毫克-3之间。叶绿素a在0至150 m层的分布在巴拿马最高（25.25 mg m-2），在伯利兹最低（6.05 mg m-2）。中美洲加勒比南部地区（哥斯达黎加和巴拿马）有两个叶绿素a最大值（混合层和温跃层），而在尼加拉瓜和伯利兹之间的垂直分布中，只有一个接近90米的最大值突出。所有站点的叶绿素a平均浓度为0.3mg m-3；因此，一般来说，贫营养条件在大陆架和斜坡上尤为突出。
{"title":"Descripción de la distribución espacial de la clorofila a, temperatura y salinidad en la plataforma y el talud continentales del Caribe centroamericano","authors":"C. L. Rodríguez, R. Morera, Sandra Loza Álvarez","doi":"10.15359/REVMAR.9-1.3","DOIUrl":"https://doi.org/10.15359/REVMAR.9-1.3","url":null,"abstract":"Under the regional coordination of OSPESCA (Central America Fisheries and Aquaculture Organization), an exploratory fishing survey campaign on the continental shelf and slope of the Central American Caribbean was conducted from January 3rd to February 3rd, 2011 on board the Miguel Oliver R/V. Temperature and salinity were determined in 76 hydrographic stations, and chlorophyll a concentration was estimated using a CTD fluorometer. Surface temperature ranged between 25°C and 27°C and salinity at that same level was between 32.5 (Panama) and 35.5 (Belize). The thermocline depth showed a descending tendency from south to north between 140 and 155 m. Chlorophyll a concentration ranged between 0.01 and 1.01 mg m-3. The distribution of chlorophyll a in the 0 to 150 m layer was the highest in Panama (25.25 mg m-2) and the lowest in Belize (6.05 mg m-2). Two chlorophyll a maximums (mixing layer and thermocline layer) characterize the southern area of the Central American Caribbean (Costa Rica and Panama), while only one maximum close to 90 m stands out in the vertical distribution of that variable between Nicaragua and Belize. Average chlorophyll a concentration for all stations was 0.3 mg m-3; therefore, in general oligotrophic conditions stand out in the continental shelf and slope.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"41-59"},"PeriodicalIF":0.2,"publicationDate":"2017-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15359/REVMAR.9-1.3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45676141","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}
J. Abarca, Marvin Ramírez Alvarado, E. C. Vargas, Karen Berrocal Artavia
The aim of this study was to evaluate the spontaneous spawning of the first generation of weakfish (Cynoscion squamipinnis) reared in captivity in order to conduct restocking programs and mariculture projects. Juveniles obtained from spontaneous spawning of wild fish caught in the Gulf of Nicoya were reared at the Laboratory of Marine Fish Reproduction and Culture in the Juan Bertoglia Richards Marine Biology Station, Universidad Nacional, Puntarenas, Costa Rica. Fish were kept in 18 t tanks, with constant water exchange (100% per day), at a temperature of 26.73 ± 1.15°C, 32.60 ± 2.69 PSU salinity, and 6.20 ± 0.61 mg/L dissolved oxygen. Every two months croakers were anesthetized and examined for sexual maturity. In January 2011, maturity of one female was confirmed by ovarian biopsies, and oocytes of 0.4-0.6 mm diameter were observed; also fluid semen was obtained from males through abdominal massage. In March 2011, a period of spontaneous spawning began, without any environmental or hormonal stimulation. In total 34 spawns were recorded from March to October 2011, for an average of 85,996 eggs, with a maximum production of 461,000 eggs and a minimum of 4,500 eggs. Fertilization percentage was 10-80%, with an average of 53.09 ± 26.97%. No significant correlations were found between spawns and environmental variables such as temperature, salinity, dissolved oxygen, tides, moon phases and precipitation.
{"title":"Desove espontáneo en cautiverio de la primera generación criada en laboratorio de corvina aguada, Cynoscion squamipinnis (Perciformes: Sciaenidae)","authors":"J. Abarca, Marvin Ramírez Alvarado, E. C. Vargas, Karen Berrocal Artavia","doi":"10.15359/REVMAR.9-1.1","DOIUrl":"https://doi.org/10.15359/REVMAR.9-1.1","url":null,"abstract":"The aim of this study was to evaluate the spontaneous spawning of the first generation of weakfish (Cynoscion squamipinnis) reared in captivity in order to conduct restocking programs and mariculture projects. Juveniles obtained from spontaneous spawning of wild fish caught in the Gulf of Nicoya were reared at the Laboratory of Marine Fish Reproduction and Culture in the Juan Bertoglia Richards Marine Biology Station, Universidad Nacional, Puntarenas, Costa Rica. Fish were kept in 18 t tanks, with constant water exchange (100% per day), at a temperature of 26.73 ± 1.15°C, 32.60 ± 2.69 PSU salinity, and 6.20 ± 0.61 mg/L dissolved oxygen. Every two months croakers were anesthetized and examined for sexual maturity. In January 2011, maturity of one female was confirmed by ovarian biopsies, and oocytes of 0.4-0.6 mm diameter were observed; also fluid semen was obtained from males through abdominal massage. In March 2011, a period of spontaneous spawning began, without any environmental or hormonal stimulation. In total 34 spawns were recorded from March to October 2011, for an average of 85,996 eggs, with a maximum production of 461,000 eggs and a minimum of 4,500 eggs. Fertilization percentage was 10-80%, with an average of 53.09 ± 26.97%. No significant correlations were found between spawns and environmental variables such as temperature, salinity, dissolved oxygen, tides, moon phases and precipitation.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"9 1","pages":"9-21"},"PeriodicalIF":0.2,"publicationDate":"2017-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15359/REVMAR.9-1.1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46526733","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}
Vicente Anislado-Tolentino, Marcela G. Medina-Lerma, Luis Fernando Del Moral-Flores
El albinismo es una condicion genetica en la cual la proteina melanica esta ausente o no es funcional y ocasionalmente ha sido reportado en el grupo de los condrictios. En este trabajo se describe el albinismo total en una raya redonda enana, Urotrygon nana, hembra madura de 81 mm del ancho de disco y con un peso de 18.42 g, fue capturada por medio de arrastre de fondo a una profundidad de 40 m frente a Puerto Madero, Chiapas, Golfo de Tehuantepec, Pacifico oriental (14° 31ʼ 6ʼʼ N - 92° 26ʼ 75ʼʼ W). Se cuantificaron las caracteristicas morfometricas del ejemplar albino y se compararon con las de un especimen normal del mismo sexo. Este trabajo representa el primer registro de esta anormalidad en la familia Urotrygonidae.
{"title":"Primer registro de albinismo en la raya redonda enana, Urotrygon nana (Urotrygonidae: Elasmobranchii), en el Pacífico oriental","authors":"Vicente Anislado-Tolentino, Marcela G. Medina-Lerma, Luis Fernando Del Moral-Flores","doi":"10.15359/REVMAR.8-2.6","DOIUrl":"https://doi.org/10.15359/REVMAR.8-2.6","url":null,"abstract":"El albinismo es una condicion genetica en la cual la proteina melanica esta ausente o no es funcional y ocasionalmente ha sido reportado en el grupo de los condrictios. En este trabajo se describe el albinismo total en una raya redonda enana, Urotrygon nana, hembra madura de 81 mm del ancho de disco y con un peso de 18.42 g, fue capturada por medio de arrastre de fondo a una profundidad de 40 m frente a Puerto Madero, Chiapas, Golfo de Tehuantepec, Pacifico oriental (14° 31ʼ 6ʼʼ N - 92° 26ʼ 75ʼʼ W). Se cuantificaron las caracteristicas morfometricas del ejemplar albino y se compararon con las de un especimen normal del mismo sexo. Este trabajo representa el primer registro de esta anormalidad en la familia Urotrygonidae.","PeriodicalId":52058,"journal":{"name":"REVMAR-Revista Ciencias Marinas y Costeras","volume":"8 1","pages":"93-100"},"PeriodicalIF":0.2,"publicationDate":"2016-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66946657","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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