Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico

Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico

The silky shark, Carcharhinus falciformis, is one of the most important shark species in the small-scale fishery landings on the Pacific coast of Mexico. In the present work, we report the main food components of C. falciformis caught by small-scale fisheries in Acapulco, Guerrero, Mexico, according...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Sandoval-Ramírez, Adriana, Moreno-Díaz, Giovanni, Rojas-Herrera, Agustín A, Violante-González, Juan, Loyo-De la Paz, Lui J, Cerdenares-Ladrón de Guevara, Genoveva
Formato: Online
Lenguaje:eng
spa
Publicado: Iniversidad Autónoma de Baja California 2022
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3201
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:cienciasmarinas.com.mx:article-3201
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
spa
format Online
author Sandoval-Ramírez, Adriana
Moreno-Díaz, Giovanni
Rojas-Herrera, Agustín A
Violante-González, Juan
Loyo-De la Paz, Lui J
Cerdenares-Ladrón de Guevara, Genoveva
spellingShingle Sandoval-Ramírez, Adriana
Moreno-Díaz, Giovanni
Rojas-Herrera, Agustín A
Violante-González, Juan
Loyo-De la Paz, Lui J
Cerdenares-Ladrón de Guevara, Genoveva
Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico
author_facet Sandoval-Ramírez, Adriana
Moreno-Díaz, Giovanni
Rojas-Herrera, Agustín A
Violante-González, Juan
Loyo-De la Paz, Lui J
Cerdenares-Ladrón de Guevara, Genoveva
author_sort Sandoval-Ramírez, Adriana
title Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico
title_short Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico
title_full Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico
title_fullStr Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico
title_full_unstemmed Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico
title_sort trophic ecology of neonates and juveniles of the silky shark, carcharhinus falciformis, off the coast of guerrero, mexico
description The silky shark, Carcharhinus falciformis, is one of the most important shark species in the small-scale fishery landings on the Pacific coast of Mexico. In the present work, we report the main food components of C. falciformis caught by small-scale fisheries in Acapulco, Guerrero, Mexico, according to size (neonates and juveniles) and sex (males and females), as well as reporting the niche breadth and trophic level. A total of 165 stomachs of C. falciformis were collected, of which 57 contained food and 108 were empty. A total of 11 prey groups were identified: 4 crustaceans, 3 fish, 2 cephalopods, 1 sea turtle, and 1 bird. According to the prey-specific index of relative importance (%PSIRI), crustaceans accounted for 77.17% of the diet. The crab Portunus xantusii was the most important component of the diet of neonates, juveniles, males, and females. The diets did not show great differences between neonates and juveniles and between males and females (Morisita–Horn index: 0.86 and 0.80, respectively). The silky shark presented a narrow niche breadth in all categories, indicating a specialist-type feeding strategy (Levin’s index <0.60). According to Amundsen’s model, C. falciformis showed preference for P. xantusii. The trophic level determined for C. falciformis indicated that it is a secondary predator.
publisher Iniversidad Autónoma de Baja California
publishDate 2022
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3201
_version_ 1792095473554685952
spelling oai:cienciasmarinas.com.mx:article-32012023-12-20T00:05:37Z Trophic ecology of neonates and juveniles of the silky shark, Carcharhinus falciformis, off the coast of Guerrero, Mexico Ecología trófica de neonatos y juveniles del tiburón sedoso, Carcharhinus falciformis, frente a la costa de Guerrero, México Sandoval-Ramírez, Adriana Moreno-Díaz, Giovanni Rojas-Herrera, Agustín A Violante-González, Juan Loyo-De la Paz, Lui J Cerdenares-Ladrón de Guevara, Genoveva Carcharhinus falciformis feeding strategy juveniles neonates trophic level Carcharhinus falciformis estrategia de alimentación juveniles neonatos nivel trófico The silky shark, Carcharhinus falciformis, is one of the most important shark species in the small-scale fishery landings on the Pacific coast of Mexico. In the present work, we report the main food components of C. falciformis caught by small-scale fisheries in Acapulco, Guerrero, Mexico, according to size (neonates and juveniles) and sex (males and females), as well as reporting the niche breadth and trophic level. A total of 165 stomachs of C. falciformis were collected, of which 57 contained food and 108 were empty. A total of 11 prey groups were identified: 4 crustaceans, 3 fish, 2 cephalopods, 1 sea turtle, and 1 bird. According to the prey-specific index of relative importance (%PSIRI), crustaceans accounted for 77.17% of the diet. The crab Portunus xantusii was the most important component of the diet of neonates, juveniles, males, and females. The diets did not show great differences between neonates and juveniles and between males and females (Morisita–Horn index: 0.86 and 0.80, respectively). The silky shark presented a narrow niche breadth in all categories, indicating a specialist-type feeding strategy (Levin’s index <0.60). According to Amundsen’s model, C. falciformis showed preference for P. xantusii. The trophic level determined for C. falciformis indicated that it is a secondary predator. El tiburón sedoso Carcharhinus falciformis es una de las especies de tiburón más importantes en las capturas de la pesquería de pequeña escala de la costa mexicana del Pacífico. En el presente trabajo reportamos los principales componentes alimentarios de C. falciformis capturados por la flota pesquera de pequeña escala en Acapulco, Guerrero, México, de acuerdo con la talla (neonatos y juveniles) y el sexo (machos y hembras), así como la amplitud de su nicho y nivel trófico. Se recolectaron en total 165 estómagos de C. falciformis, de los cuales 57 presentaron contenido estomacal y 108 se encontraron vacíos. Se identificaron en total 11 componentes alimentarios: 4 crustáceos, 3 peces, 2 cefalópodos, 1 tortuga marina y 1 ave. De acuerdo con el índice de importancia relativa especifica de la presa (%IIREP), el grupo de los crustáceos representó el 77.17% de la dieta. El cangrejo Portunus xantusii fue el componente más importante de la dieta de neonatos, juveniles, machos y hembras. Las dietas entre neonatos y juveniles y entre machos y hembras no presentaron grandes diferencias (índice de Morisita-Horn: 0.86 y 0.80, respectivamente). El tiburón sedoso presentó una amplitud de nicho estrecha en todas las categorías, lo que indicó una estrategia de alimentación de tipo especialista (índice de Levin <0.60). De acuerdo con el modelo de Amundsen, C. falciformis mostró una preferencia por P. xantusii. El nivel trófico determinado para C. falciformis indicó que es un depredador secundario. Iniversidad Autónoma de Baja California 2022-12-16 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf text/xml text/xml https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3201 10.7773/cm.y2022.3201 Ciencias Marinas; Vol. 48 (2022) Ciencias Marinas; Vol. 48 (2022) 2395-9053 0185-3880 eng spa https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3201/420420703 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3201/420420905 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3201/420420906 Copyright (c) 2022 Adriana Sandoval-Ramírez, Giovanni Moreno-Díaz, Agustín A Rojas-Herrera, Juan Violante-González, Lui J Loyo-De la Paz, Genoveva Cerdenares-Ladrón de Guevara https://creativecommons.org/licenses/by/4.0

Ejemplares similares