Density temporal variation and ecological aspects of ichthyoplankton in the epipelagic zone of the Cariaco Trench, Venezuela
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| Autores: | , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2023 |
| Descripción: | The composition and ecological aspects of fish larvae present in the Cariaco Trench, Venezuela, were described. Planktonic samples were collected between October 2012 and December 2013 during seven campaigns. A standard conical hanging net with a 35 cm mouth diameter and a 300-micron pore was used. Drafts were made horizontally, at a depth of 20 meters, with a duration of 15 minutes, at a speed of 2 knots. A total of 322 fish larvae was obtained: in 16 orders, 20 families and 28 species. The families Carangidae and Gobiidae presented the highest number of species, with 6 and 3, respectively; while Bregmacerotidae was the one that contributed with the highest density of organisms (53.29 org/100 m3), being the species with the highest relative abundance Bregmaceros cantori with 29.81%. In general, monthly diversity was low, with values between 0 and 1.55 bits/ind, not differing statistically between months (KW = 7.604; P = 0.2686). Species richness between 0 and 2.06 did not present differences between months either (KW = 7.0927; P = 0.3124). The ichthyoplankton of the Cariaco Trench was dominated mainly by families of mesopelagic fish such as Bregmacerotidae and Myctophidae. Of the 28 species identified, 54% are of commercial interest to the country, which provides additional value to the Cariaco Trench. |
| País: | Portal de Revistas UNA |
| Institución: | Universidad Nacional de Costa Rica |
| Repositorio: | Portal de Revistas UNA |
| Lenguaje: | Español Inglés |
| OAI Identifier: | oai:ojs.www.una.ac.cr:article/19193 |
| Acceso en línea: | https://www.revistas.una.ac.cr/index.php/revmar/article/view/19193 |
| Palabra clave: | Fish larvae Cariaco basin taxonomy diversity composition Larvas de peces Cuenca de Cariaco taxonomía diversidad composición larvas de peixes bacia do Cariaco taxonomia diversidade composição |