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| González G.,Roy; Bermúdez Tobón,Adriana; Navas-S.,Gabriel R.. |
| ABSTRACT Rachycentron canadum is an economically important fish in aquaculture due to its resistance to environmental variations, the feasibility of culture in confinement, high growth rates, and good acceptance by consumers. The profitability of their cage culture is negatively affected by the difficulty of implementing monosex cultures due to the apparent similarity between sexes. In this study, morphometric techniques were used to determine sexual dimorphism by analyzing measurements and the fish’s shape. Differences were found between the sexes in the position of the eyes, lips, pectoral fin and ventral fin, and the body’s general shape. The sexing precision of the individuals was 75.4 % with distances and 82.7 % with geometric morphometry. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cobia; Geometric morphometry; Distances morphometrics; Colombian Caribbean.. |
| Ano: 2021 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000100079 |
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| Gómez-Cubillos,Catalina; Gavio,Brigitte; Zea,Sven. |
| ABSTRACT Algal turfs are currently the most abundant benthic component on most coral reefs. Their wide distribution, functional role and positive response to factors that stress corals confirm their importance in the functioning of reef ecosystem. It has been shown that species composition, structural development and sediment retention influence their capacity to kill and displace adjacent live coral tissue. In this study in two reefs of the Tayrona National Natural Park (Colombian Caribbean), the variation in structure of turfs growing on and in direct interaction with massive live corals was determined, and its structural complexity was related with its sediment retention capacity. For that, the taxonomical composition was determined, and canopy height,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coral reefs; Algal turfs; Interactions; Structure of algal assemblages; Sediment retention; Colombian Caribbean.. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300045 |
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| Restrepo-Garzón,Nicolás; Álvarez-Rodríguez,Rafael Andrés; Ramírez-Gallego,Cristian; Ruíz-Álvarez,Tulio; Barrientos-Muñoz,Karla G.. |
| ABSTRACT The conservation and nesting ecology of the hawksbill turtle (Eretmochelys imbricata) are described, as a result of a systematic monitoring between 2018 and 2019 in the municipality of Rincón del Mar, San Onofre, Sucre. Six hawksbill turtle nests were recorded in situ, one nest was poached by humans. The nesting female spawned a total of 761 eggs in five clutches (mean 152.2 ± 15.5 eggs per clutch). Mean hatching success was 78.2 ± 12.4 % and the mean emergence success was 74.7 ± 14.1 % (n = 5). The mean incubation period was 54 ± 7.8 days (n = 4). 591 hatchlings were released into the sea, of which 22 (3.72 %) were rescued and released with the community. In addition, physical measurements of the nests (width, depth, distance to the beach) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hawksbill turtle; Conservation; Nesting ecology; Hatching success; Colombian Caribbean.. |
| Ano: 2021 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000200053 |
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| Vega-Sequeda,Johanna; Agudelo-Ramírez,Claudia; Mendoza-Mazzeo,Álvaro; Sanjuan-Muñoz,Adolfo. |
| ABSTRACT Coral reefs have experienced an extensive degradation over the last decades as a result of anthropogenic and natural disturbances. This study presents an historical characterization (1989-2015) of changes in composition of the substrate in coral formations in the San Bernardo Archipelago. In addition, in 2015 coral reef health (presence of deterioration signs) was evaluated, and satellite temperature data were analyzed. In general, coral cover showed a stable trend between 1989 and 2010. The observed differences in the coral reef formations in 2013 and 2015 could have been due to the increase in coverage of species of the genus Orbicella, Porites, Agaricia, Siderastrea and the hydrocoral Millepora complanata. The lower coverage in 1989, 1991 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coral reefs; Coral monitoring; Reef cover; Corales del Rosario y San Bernardo Natural National Park; Colombian Caribbean.. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300167 |
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