Pub Date : 2022-10-28DOI: 10.25268/bimc.invemar.2022.51.2.1173
Carlos Pereira Ibarra, Evelyn Zoppi de Roa, Edie Montiel, V. Hernández, Anyoelis Castillo
El microfitobentos es una comunidad que agrupa a los microorganismos fotosintéticos bentónicos. En Venezuela y el resto de los países del mar Caribe, este grupo ha sido escasamente estudiado, por lo que se desconoce su diversidad. Así, se propuso describir las variaciones espaciales y temporales de su composición y abundancia en la zona costera central de Venezuela. Los muestreos fueron realizados mensualmente desde junio 2014 hasta marzo 2015, en estaciones aleatorias con profundidades inferiores a 20 m. Los datos de riqueza y abundancia fueron procesados mediante pruebas de hipótesis multivariadas (Anosim – SIMPER – nMDS). Se identificaron 327 especies, dominadas por diatomeas y dinoflagelados, sin variaciones espaciales y temporales notables. En términos de abundancia, el grupo más representativo fue el de las diatomeas (68 %), seguido por las cianobacterias (28 %). El microfitobentos presentó una variabilidad temporal en la que se alcanzaron densidades mayores entre julio y agosto, mientras que el resto de los meses presentaron abundancias similares. En términos generales, se obtuvo abundancia estándar de acuerdo con lo encontrado en otras áreas del mundo, con diferencias notables entre el microfitobentos de los sustratos evaluados y una riqueza específica alta que se mantiene constante durante todo el año.
{"title":"Estructura comunitaria del microfitobentos de la zona costera central de Venezuela","authors":"Carlos Pereira Ibarra, Evelyn Zoppi de Roa, Edie Montiel, V. Hernández, Anyoelis Castillo","doi":"10.25268/bimc.invemar.2022.51.2.1173","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.2.1173","url":null,"abstract":"El microfitobentos es una comunidad que agrupa a los microorganismos fotosintéticos bentónicos. En Venezuela y el resto de los países del mar Caribe, este grupo ha sido escasamente estudiado, por lo que se desconoce su diversidad. Así, se propuso describir las variaciones espaciales y temporales de su composición y abundancia en la zona costera central de Venezuela. Los muestreos fueron realizados mensualmente desde junio 2014 hasta marzo 2015, en estaciones aleatorias con profundidades inferiores a 20 m. Los datos de riqueza y abundancia fueron procesados mediante pruebas de hipótesis multivariadas (Anosim – SIMPER – nMDS). Se identificaron 327 especies, dominadas por diatomeas y dinoflagelados, sin variaciones espaciales y temporales notables. En términos de abundancia, el grupo más representativo fue el de las diatomeas (68 %), seguido por las cianobacterias (28 %). El microfitobentos presentó una variabilidad temporal en la que se alcanzaron densidades mayores entre julio y agosto, mientras que el resto de los meses presentaron abundancias similares. En términos generales, se obtuvo abundancia estándar de acuerdo con lo encontrado en otras áreas del mundo, con diferencias notables entre el microfitobentos de los sustratos evaluados y una riqueza específica alta que se mantiene constante durante todo el año.","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42027209","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}
El Parque Nacional Natural Tayrona, ubicado en la costa Caribe colombiana, está formado por una costa de acantilados y bahías en su mitad occidental, en cuyo interior se encuentran formaciones coralinas. En 2005 se encontró una formación en la bahía de Cinto dominada por Acropora palmata afectada por una enfermedad cuyas lesiones eran similares a las causadas por la enfermedad de White Pox. Durante los siguientes dos años se realizó un seguimiento a 15 lesiones mediante registro fotográfico en tres ocasiones distintas (mayo y agosto de 2006 y marzo 2007), coincidiendo con las dos épocas climáticas contrastantes de la región. Se encontró un crecimiento permanente en todas las lesiones con un promedio de 0,8 cm2/día. Contrario a lo observado en el white pox y otras enfermedades en la región, estas lesiones no dejaron de crecer al descender la temperatura en los primeros meses del año. Este trabajo describe el aspectogeneral, los distintos estadios de crecimiento y la velocidad con que se expanden las lesiones en comparación con estudios previos en el Caribe. Por su aspecto y porque solo afectaba a colonias de A. palmata se pensó que se trataba de white pox, pero esta hipótesis no pudo verificarse concluyentemente.
{"title":"Mortalidad del coral Acropora palmata por una enfermedad similar al white pox en la bahía de Cinto, Parque Nacional Natural Tayrona, Caribe colombiano","authors":"Raúl Navas-Camacho, Rebeca Franke Ante, Andrés Acosta Chaparro","doi":"10.25268/bimc.invemar.2022.51.2.1257","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.2.1257","url":null,"abstract":"El Parque Nacional Natural Tayrona, ubicado en la costa Caribe colombiana, está formado por una costa de acantilados y bahías en su mitad occidental, en cuyo interior se encuentran formaciones coralinas. En 2005 se encontró una formación en la bahía de Cinto dominada por Acropora palmata afectada por una enfermedad cuyas lesiones eran similares a las causadas por la enfermedad de White Pox. Durante los siguientes dos años se realizó un seguimiento a 15 lesiones mediante registro fotográfico en tres ocasiones distintas (mayo y agosto de 2006 y marzo 2007), coincidiendo con las dos épocas climáticas contrastantes de la región. Se encontró un crecimiento permanente en todas las lesiones con un promedio de 0,8 cm2/día. Contrario a lo observado en el white pox y otras enfermedades en la región, estas lesiones no dejaron de crecer al descender la temperatura en los primeros meses del año. Este trabajo describe el aspectogeneral, los distintos estadios de crecimiento y la velocidad con que se expanden las lesiones en comparación con estudios previos en el Caribe. Por su aspecto y porque solo afectaba a colonias de A. palmata se pensó que se trataba de white pox, pero esta hipótesis no pudo verificarse concluyentemente.","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47740685","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}
Pub Date : 2022-10-28DOI: 10.25268/bimc.invemar.2022.51.2.1161
José Eduardo Fuentes Delgado, Camilo F. Mina-Cartagena, R. Johnston-González
Conservation planning for marine-coastal environments requires updated and detailed maps; the aim of this work is to generate detailed maps for two mudflats in the Iscuandé River Delta (Bocana de Iscuandé) in the Colombian Pacific Coast (Department of Nariño). These are important areas for fauna, especially migratory shorebirds. To address this problem, this study investigated the use of unmanned aerial vehicles (UAVs) as an alternative for collecting detailed mapping information in areas of difficult access using photogrammetric methodsand a geographic information system (GIS). UAV images were used to generate maps with a high level of detail at a scale of 1:10,000 that include detailed information about environments such as mudflats and mangroves which had not been mapped before. UAVs are a practical tool for mapping places where weather and access conditions hinder the use of satellite images or conventional aerial photography. They are also useful for mapping areas with high temporal and spatial variability, such as mudflats, where other platforms may not reveal their short-term dynamics. Our results show that this technique has a high potential for mapping such environments, and reveal that the Iscuandé mudflats aremaintained by a relative equilibrium between the ebb and flow of waves and tides, and are also influenced by the local climate. This type of application provides critical data for conservation and management strategies of areas with great ecological importance.
{"title":"Mapping of mudflats with UAV images in La Bocana de Iscuandé, Colombian Pacific coast","authors":"José Eduardo Fuentes Delgado, Camilo F. Mina-Cartagena, R. Johnston-González","doi":"10.25268/bimc.invemar.2022.51.2.1161","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.2.1161","url":null,"abstract":"Conservation planning for marine-coastal environments requires updated and detailed maps; the aim of this work is to generate detailed maps for two mudflats in the Iscuandé River Delta (Bocana de Iscuandé) in the Colombian Pacific Coast (Department of Nariño). These are important areas for fauna, especially migratory shorebirds. To address this problem, this study investigated the use of unmanned aerial vehicles (UAVs) as an alternative for collecting detailed mapping information in areas of difficult access using photogrammetric methodsand a geographic information system (GIS). UAV images were used to generate maps with a high level of detail at a scale of 1:10,000 that include detailed information about environments such as mudflats and mangroves which had not been mapped before. UAVs are a practical tool for mapping places where weather and access conditions hinder the use of satellite images or conventional aerial photography. They are also useful for mapping areas with high temporal and spatial variability, such as mudflats, where other platforms may not reveal their short-term dynamics. Our results show that this technique has a high potential for mapping such environments, and reveal that the Iscuandé mudflats aremaintained by a relative equilibrium between the ebb and flow of waves and tides, and are also influenced by the local climate. This type of application provides critical data for conservation and management strategies of areas with great ecological importance.","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44227892","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}
Pub Date : 2022-10-28DOI: 10.25268/bimc.invemar.2022.51.2.1125
M. J. Marin Jarrin, José R. Marín Jarrín, M. Borbor-Cordova
The Guayas estuary in Ecuador is the largest estuarine ecosystem on the Pacific coast of South America. This estuary provides nurseryand fisheries habitats, as well as filtering and detoxification services provided by suspension feeders, vegetation, and wetlands. Weused oceanographic and meteorological observations to understand the hydrodynamic variability of two areas in the inner part ofthe estuary, Manglares de Churute and Estero Salado, from February 2016 to February 2017. Churute has less anthropogenic impacts thanEstero Salado, which is currently uncoupled from river flow and highly influenced by Guayaquil, the second largest city in Ecuador, andadjacent shrimp pond effluents. The influences from the ocean and river on Churute include higher dissolved oxygen (DO) and lower salinity,temperature and phosphates than in Estero Salado, particularly during the wet season when the river is the dominant mode of forcing inthose warm and rainy first months of the year. Hypoxic levels (DO below 2 mg L-1) were found in Estero Salado in several stations duringthe hot, rainy season. These data suggest seasonal variability (dry/rainy season) influences the hydrographic conditions in the inner Guayasestuary mostly, adding variability to salinity, turbidity, nutrients and DO of the whole water column.
厄瓜多尔的瓜亚斯河口是南美洲太平洋沿岸最大的河口生态系统。该河口提供了苗圃和渔业栖息地，以及悬浮饲养者、植被和湿地提供的过滤和解毒服务。2016年2月至2017年2月，我们利用海洋学和气象观测来了解河口内部两个区域Manglares de Churute和Estero Salado的水动力变化。丘鲁特的人为影响小于埃斯特罗萨拉多，后者目前与河流流量无关，并受到厄瓜多尔第二大城市瓜亚基尔和附近虾池废水的高度影响。与Estero Salado相比，海洋和河流对Churute的影响包括溶解氧（DO）更高，盐度、温度和磷酸盐更低，尤其是在雨季，在一年中温暖多雨的前几个月，河流是主要的强迫模式。在炎热的雨季，在Estero Salado的几个站点发现了缺氧水平（DO低于2 mg L-1）。这些数据表明，季节变化（旱季/雨季）主要影响Guayas河口内部的水文条件，增加了整个水柱的盐度、浊度、营养物质和溶解氧的变化。
{"title":"Seasonal dynamics in the inner Guayas Estuary, Ecuador","authors":"M. J. Marin Jarrin, José R. Marín Jarrín, M. Borbor-Cordova","doi":"10.25268/bimc.invemar.2022.51.2.1125","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.2.1125","url":null,"abstract":"The Guayas estuary in Ecuador is the largest estuarine ecosystem on the Pacific coast of South America. This estuary provides nurseryand fisheries habitats, as well as filtering and detoxification services provided by suspension feeders, vegetation, and wetlands. Weused oceanographic and meteorological observations to understand the hydrodynamic variability of two areas in the inner part ofthe estuary, Manglares de Churute and Estero Salado, from February 2016 to February 2017. Churute has less anthropogenic impacts thanEstero Salado, which is currently uncoupled from river flow and highly influenced by Guayaquil, the second largest city in Ecuador, andadjacent shrimp pond effluents. The influences from the ocean and river on Churute include higher dissolved oxygen (DO) and lower salinity,temperature and phosphates than in Estero Salado, particularly during the wet season when the river is the dominant mode of forcing inthose warm and rainy first months of the year. Hypoxic levels (DO below 2 mg L-1) were found in Estero Salado in several stations duringthe hot, rainy season. These data suggest seasonal variability (dry/rainy season) influences the hydrographic conditions in the inner Guayasestuary mostly, adding variability to salinity, turbidity, nutrients and DO of the whole water column.","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44917280","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}
Pub Date : 2022-06-14DOI: 10.25268/bimc.invemar.2022.51.1.1164
C. E. Gómez, Santiago Millan, Andrés Acosta-Chaparro, Alfredo Abril-Howard, Raúl Navas-Camacho
Hurricanes are important natural destructive forces for coral reefs that can change the structural component of the habitat. On November 16th, 2020, the hurricane Iota passed ~10 km north of the islands of Providencia and Santa Catalina with sustained winds of a category 5 hurricane. The purpose of this study was to document the magnitude of the impact on coral reefs around the islands two weeks after the hit, as part of the “Operación Cangrejo Negro”. Visual assessments were performed at 11 representative coral reef formations between 2 and 17 m depth. Estimates of the impact were evaluated within an approximate area of 200 m2, which was categorized with score values ranging from 0 to 5 according to the level of damage. Preliminary estimates at coral reef formations indicated impact in 72 % of the stations surveyed, concentrated mainly on shallow areas (5-7 m). Approximately 45 % of the sites had low to low-medium damage and 27 % showed medium to moderate damage with high variability between and within stations. From this preliminary assessment we conclude that the impact was widespread along the island on shallow areas structured by big boulders of Orbicella spp., mainly related to colony-level damage with less reef structural damage
{"title":"Evaluación preliminar del impacto del huracán Iota en arrecifes coralinos de las islas de Providencia y Santa Catalina","authors":"C. E. Gómez, Santiago Millan, Andrés Acosta-Chaparro, Alfredo Abril-Howard, Raúl Navas-Camacho","doi":"10.25268/bimc.invemar.2022.51.1.1164","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.1.1164","url":null,"abstract":"Hurricanes are important natural destructive forces for coral reefs that can change the structural component of the habitat. On November 16th, 2020, the hurricane Iota passed ~10 km north of the islands of Providencia and Santa Catalina with sustained winds of a category 5 hurricane. The purpose of this study was to document the magnitude of the impact on coral reefs around the islands two weeks after the hit, as part of the “Operación Cangrejo Negro”. Visual assessments were performed at 11 representative coral reef formations between 2 and 17 m depth. Estimates of the impact were evaluated within an approximate area of 200 m2, which was categorized with score values ranging from 0 to 5 according to the level of damage. Preliminary estimates at coral reef formations indicated impact in 72 % of the stations surveyed, concentrated mainly on shallow areas (5-7 m). Approximately 45 % of the sites had low to low-medium damage and 27 % showed medium to moderate damage with high variability between and within stations. From this preliminary assessment we conclude that the impact was widespread along the island on shallow areas structured by big boulders of Orbicella spp., mainly related to colony-level damage with less reef structural damage","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43598298","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}
Pub Date : 2022-06-14DOI: 10.25268/bimc.invemar.2022.51.1.996
Brigitte Gavio, July Paulin Vargas-Llanos, José Ernesto Mancera-Pineda
San Andres Island is one of the main touristic places in Colombia, and its main attractions are its sandy beaches and the marine coastal ecosystems, such as coral reef and seagrass beds. However improper behavior of both residents and tourists on solid residue disposal may threaten not only the aesthetic of the island ́s beaches, but also poses risk to marine life. The objective of this research was to assess the amount of litter on the main beaches of the island. We surveyed three popular beaches for ten weeks. We collected 9894 units of litter, equivalent to a weight of 23 212.47 g. Beach cleanliness was estimated using the Clean Coast Index, and two of the three sites resulted “extremely dirty”, while the third was classified as “dirty”. The majority of the litter was plastic (59.5 % of total weight), followed by glass (20.4 %). Due to the persistence and negative effects of solid waste on coastal fauna, it is necessary to improve the management of litter disposal, and improve educational programs for both residents and tourists, to increase their awareness on the problem.
{"title":"Basura en el paraíso: desechos marinos en las playas de la isla de San Andrés, Reserva de Biosfera Seaflower, Caribe colombiano","authors":"Brigitte Gavio, July Paulin Vargas-Llanos, José Ernesto Mancera-Pineda","doi":"10.25268/bimc.invemar.2022.51.1.996","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.1.996","url":null,"abstract":"San Andres Island is one of the main touristic places in Colombia, and its main attractions are its sandy beaches and the marine coastal ecosystems, such as coral reef and seagrass beds. However improper behavior of both residents and tourists on solid residue disposal may threaten not only the aesthetic of the island ́s beaches, but also poses risk to marine life. The objective of this research was to assess the amount of litter on the main beaches of the island. We surveyed three popular beaches for ten weeks. We collected 9894 units of litter, equivalent to a weight of 23 212.47 g. Beach cleanliness was estimated using the Clean Coast Index, and two of the three sites resulted “extremely dirty”, while the third was classified as “dirty”. The majority of the litter was plastic (59.5 % of total weight), followed by glass (20.4 %). Due to the persistence and negative effects of solid waste on coastal fauna, it is necessary to improve the management of litter disposal, and improve educational programs for both residents and tourists, to increase their awareness on the problem.","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44087735","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}
Pub Date : 2022-06-14DOI: 10.25268/bimc.invemar.2022.51.1.1065
Rodolfo Cornejo, Luis La Cruz, Ramiro Castillo
The present study determined the distribution and biomass of the Peruvian anchovy and pelagic red squat lobster related to the oceanographic characteristics in the marine protected area of the Paracas National Reserve in the Northern Humboldt Current System. Acoustic, biological, and oceanographic information was collected on the pelagic habitat in surveys carried out by the Peruvian Marine Research Institute during the summer and spring of 2018, 2019, and 2020. The results obtained indicated that the spatial occupation of the pelagic habitat of Peruvian anchovy and pelagic red squat lobster were influenced by the dynamics of upwelling, water masses, and a shallow and intense Oxygen Minimum Zone. Spatial overlap of high biomass of Peruvian anchovy and pelagic red squat lobster were recorded in the surface layer during the night. Although, with the presence of dense swarms of múnida in anoxic intermediate waters of the Oxygen Minimum Zone during the day. The Marine Protected Area off the Paracas National Reserve functions as a protection zone for the structure and functioning of the pelagic-neritic ecosystem and strengthens the fishery production of Peruvian anchovy stock in the Northern Humboldt Current System
{"title":"Distribución y biomasa de anchoveta (Engraulis ringens) y múnida (Pleuroncodes monodon) en el ecosistema marino de la Reserva Nacional de Paracas, región sur del Perú","authors":"Rodolfo Cornejo, Luis La Cruz, Ramiro Castillo","doi":"10.25268/bimc.invemar.2022.51.1.1065","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.1.1065","url":null,"abstract":"The present study determined the distribution and biomass of the Peruvian anchovy and pelagic red squat lobster related to the oceanographic characteristics in the marine protected area of the Paracas National Reserve in the Northern Humboldt Current System. Acoustic, biological, and oceanographic information was collected on the pelagic habitat in surveys carried out by the Peruvian Marine Research Institute during the summer and spring of 2018, 2019, and 2020. The results obtained indicated that the spatial occupation of the pelagic habitat of Peruvian anchovy and pelagic red squat lobster were influenced by the dynamics of upwelling, water masses, and a shallow and intense Oxygen Minimum Zone. Spatial overlap of high biomass of Peruvian anchovy and pelagic red squat lobster were recorded in the surface layer during the night. Although, with the presence of dense swarms of múnida in anoxic intermediate waters of the Oxygen Minimum Zone during the day. The Marine Protected Area off the Paracas National Reserve functions as a protection zone for the structure and functioning of the pelagic-neritic ecosystem and strengthens the fishery production of Peruvian anchovy stock in the Northern Humboldt Current System","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44911834","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}
Pub Date : 2022-06-14DOI: 10.25268/bimc.invemar.2022.51.1.1020
Andrés Acosta Chaparro, Laura Sánchez-Valencia, D. Gómez-López, Juan David Gónzalez-Corredor, Raúl Navas-Camacho
Seagrass meadows have stood out for being very effective fixing atmospheric carbon, among others, due to their ability to produce plant biomass. Therefore, the values of shoot density (m2), biomass (cores) and carbon present in 12 locations with Thalassia testudinum at the Colombian Caribbean (La Guajira and San Andrés Island) were quantified. The biological samples were processed in laboratory until obtaining the values of aerial, underground and total dry weight, and the estimation of the carbon was stablishing from a ratio of 35 % of the dry biomass. Statistical tests were carried out to determine significant differences between the sites, highlighting the aerial biomass in La Guajira and the underground biomass in San Andrés. It was calculated that the total carbon in the seagrasses’ biomass from La Guajira were 197 484 Mg C and in San Andrés 1835.4 Mg C. The difference between locations were due to particular geomorphological and intrinsic factors. It is highlighted that, although the carbon retained in the biomass (aerial and underground) is comparatively lower than in sediments, it constitutes the pillar of conservation of both carbon sink as well as for the sustainability of the ecosystem.
{"title":"Biomasa de pastos marinos y su rol como sumideros de carbono en las localidades de la isla de San Andrés y La Guajira, Caribe colombiano","authors":"Andrés Acosta Chaparro, Laura Sánchez-Valencia, D. Gómez-López, Juan David Gónzalez-Corredor, Raúl Navas-Camacho","doi":"10.25268/bimc.invemar.2022.51.1.1020","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.1.1020","url":null,"abstract":"Seagrass meadows have stood out for being very effective fixing atmospheric carbon, among others, due to their ability to produce plant biomass. Therefore, the values of shoot density (m2), biomass (cores) and carbon present in 12 locations with Thalassia testudinum at the Colombian Caribbean (La Guajira and San Andrés Island) were quantified. The biological samples were processed in laboratory until obtaining the values of aerial, underground and total dry weight, and the estimation of the carbon was stablishing from a ratio of 35 % of the dry biomass. Statistical tests were carried out to determine significant differences between the sites, highlighting the aerial biomass in La Guajira and the underground biomass in San Andrés. It was calculated that the total carbon in the seagrasses’ biomass from La Guajira were 197 484 Mg C and in San Andrés 1835.4 Mg C. The difference between locations were due to particular geomorphological and intrinsic factors. It is highlighted that, although the carbon retained in the biomass (aerial and underground) is comparatively lower than in sediments, it constitutes the pillar of conservation of both carbon sink as well as for the sustainability of the ecosystem.","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44499636","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}
Pub Date : 2022-06-14DOI: 10.25268/bimc.invemar.2022.51.1.1087
Adolfo Sanjuan Muñoz, Diana Bustos-Montes, C. Polo-Silva, Alejandro Henao-Castro, Milena Marrugo, Antonio Delgado-Huertas, Dolors Vinyoles-Cartanya, A. Acero P.
Lionfish was studied in the mesophotic environment. 237 specimens were observed, most in the upper mesophotic zone. Males were larger than females and differences between sexes in growth models were found. Sixteen prey items were identified, the most important being the teleost families Acanthuridae and Monacanthidae, and the crustacean Penaeidae. The mean of δ13C was -17.08 ± 0.36 ‰ and δ15N was 8.68 ± 0.46 ‰, with no differences between sexes. Lionfish occupies a less extensive isotopic niche in mesophotic environment than in shallow sectors; there is an isotopic niche overlap between sexes. Likewise, lionfish has specialized trophic habits. All specimens were mature and in females regression phase predominated. In females, condition factor (CF), gonadosomatic index (GSI) and hepatosomatic index (HSI) increased with gonadal development, reaching peak in the active spawning phase, and decreasing in regression. Males had a condition factor similar to spawning females, but IGS and IHS were lower
{"title":"Biología y ecología del pez león (Pterois volitans) en el Parque Nacional Natural Corales de Profundidad, Caribe colombiano","authors":"Adolfo Sanjuan Muñoz, Diana Bustos-Montes, C. Polo-Silva, Alejandro Henao-Castro, Milena Marrugo, Antonio Delgado-Huertas, Dolors Vinyoles-Cartanya, A. Acero P.","doi":"10.25268/bimc.invemar.2022.51.1.1087","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.1.1087","url":null,"abstract":"Lionfish was studied in the mesophotic environment. 237 specimens were observed, most in the upper mesophotic zone. Males were larger than females and differences between sexes in growth models were found. Sixteen prey items were identified, the most important being the teleost families Acanthuridae and Monacanthidae, and the crustacean Penaeidae. The mean of δ13C was -17.08 ± 0.36 ‰ and δ15N was 8.68 ± 0.46 ‰, with no differences between sexes. Lionfish occupies a less extensive isotopic niche in mesophotic environment than in shallow sectors; there is an isotopic niche overlap between sexes. Likewise, lionfish has specialized trophic habits. All specimens were mature and in females regression phase predominated. In females, condition factor (CF), gonadosomatic index (GSI) and hepatosomatic index (HSI) increased with gonadal development, reaching peak in the active spawning phase, and decreasing in regression. Males had a condition factor similar to spawning females, but IGS and IHS were lower","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45574212","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}
Pub Date : 2022-06-14DOI: 10.25268/bimc.invemar.2022.51.1.1096
Karla G. Barrientos-Muñoz, Maike Heidemeyer, Luis Fernando Ortega-Gordillo, Miller Valencia-Díaz, J. P. Caldas, Edward Leonardo Sevilla-Dueñas, R. Arauz, Cristian Ramírez-Gallego
The species and sizes of sea turtles present in the Bahía Málaga Conservation Mosaic, Valle del Cauca, were characterized between 2016-2020 through aquatic monitoring and voluntary delivery by native fishermen. The registry of individuals was determined by aquatic monitoring, which was divided into three phases: exploratory sampling, continuous sampling, standardized sampling, plus voluntary deliveries by fishermen in their fishing tasks. A total of 107 hours of effort were used to detect 51 individuals of hawksbill (Eretmochelys imbricata) and black (Chelonia mydas) turtles. These results contribute as a baseline for the knowledge of sea turtles as an effective strategy for research and conservation in Bahía Málaga.
{"title":"Tortugas marinas en el mosaico de conservación Bahía Málaga, Pacífico colombiano","authors":"Karla G. Barrientos-Muñoz, Maike Heidemeyer, Luis Fernando Ortega-Gordillo, Miller Valencia-Díaz, J. P. Caldas, Edward Leonardo Sevilla-Dueñas, R. Arauz, Cristian Ramírez-Gallego","doi":"10.25268/bimc.invemar.2022.51.1.1096","DOIUrl":"https://doi.org/10.25268/bimc.invemar.2022.51.1.1096","url":null,"abstract":"The species and sizes of sea turtles present in the Bahía Málaga Conservation Mosaic, Valle del Cauca, were characterized between 2016-2020 through aquatic monitoring and voluntary delivery by native fishermen. The registry of individuals was determined by aquatic monitoring, which was divided into three phases: exploratory sampling, continuous sampling, standardized sampling, plus voluntary deliveries by fishermen in their fishing tasks. A total of 107 hours of effort were used to detect 51 individuals of hawksbill (Eretmochelys imbricata) and black (Chelonia mydas) turtles. These results contribute as a baseline for the knowledge of sea turtles as an effective strategy for research and conservation in Bahía Málaga.","PeriodicalId":35743,"journal":{"name":"Boletin de Investigaciones Marinas y Costeras","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44212291","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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