Diet variation Sciaenidae fish in the bay of Buenaventura, Colombian Pacific
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| Autors: | , , |
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| Format: | artículo original |
| Estat: | Versión publicada |
| Data de publicació: | 2025 |
| Descripció: | Introduction: The fish of the Sciaenidae family are important for commercial and subsistence fishing on the Colombian Pacific coast. However, it is unknown how their trophic habits vary between climatic seasons. The objective of this research was to determine the variation of diet and the presence of microplastics (MP) in species of this family and its relationship with the environmental dynamics of the water of the Buenaventura Bay, colombian Pacific. Methods: Samples were taken in dry and rainy season of 2020 and 2021 in the internal and external areas of the bay. A total of (144) individuals of the species Larimus argenteus, Stellifer zestocarus and Stellifer melanocheir, were sampled using artisanal trawling and their stomach contents were classified into five categories of food prey corresponding to crustaceans (shrimp, crabs, isopods), fish, nematodes, detritus (organic material), and MP microplastics (fibers and fragments). The analysis of stomach contents used as trophic parameters, the frequency of occurrence (% FO) and the relative importance index (IRI %) of prey. These stomach contents were related to environmental variables salinity (PSU), temperature (° C), pH, dissolved oxygen (mg l−1) and water transparency (cm) through GAM models. Results: In general, Sciaenidae fish consumed mainly crustaceans in dry season. The fish as prey supplement their diet in both periods, but their consumption intensifies in rainy season. The detritus is consumed mostly in dry season, being able to relate to the consumption of crustaceans, while the nematodes are consumed mainly in rainy season, associated with the greater consumption of fish. L. argenteus consumed more crustaceans in dry season, associated with high salinities and low temperatures, while in rainy season the intake of fish increases. While, in low temperatures increased the intake of detritus in S. zestocarus. The highest MP content in L. argenteus was found in low salinity and pH, associated with rainy season and internal zone. Conclusions: The study suggests that the diet of Sciaenidae fish is influenced by the estuarine supply, subject to environmental variation. |
| Pais: | Portal de Revistas UCR |
| Institution: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Idioma: | Español |
| OAI Identifier: | oai:portal.revistas.ucr.ac.cr:article/323 |
| Accés en línia: | https://revistas.ucr.ac.cr/index.php/rrbt/article/view/323 |
| Paraula clau: | trophic habits; trophic ecology; estuarine fish; gut content; artisanal fishing; environmental variation; plastic pollution. hábitos tróficos; ecología trófica; peces estuarinos; contenido estomacal; pesca artesanal; variación ambiental; contaminación plástica. |