Diet variability of snappers(Teleostei:Lutjanidae)in a bay-to-reef ecosystem of the Mexican Caribbean  

作　　者：Leon Felipe Martínez-Juarez Juan J.Schmitter-Soto Nancy Cabanillas-Teran Norman Mercado-Silva 

机构地区：[1]El Colegio de la Frontera Sur,77014,Chetumal,Quintana Roo,Mexico [2]Centro de Investigacion en Biodiversidad y Conservacion,Universidad Autonoma del Estado de Morelos,62209,Cuernavaca,Morelos,Mexico

出　　处：《Water Biology and Security》2024年第1期53-59,共7页水生生物与安全（英文）

摘　　要：Fishes use environmental resources differently.Snapper ontogenic movements among coastal habitats lead to diverse diets.We investigated the diets of seven snapper species(Lutjanus apodus,L.analis,L.griseus,L.jocu,L.mahogoni,L.synagris,and Ocyurus chrysurus)in three interconnected coastal environments in the western Caribbean:Río Huach channel,Chetumal/Corozal bay,and the adjacent Xcalak reef lagoon.These three encompass all habitats used by the seven species in the study area.Snapper diets were mostly composed of fish and crustaceans,but dominance of either group varied among the studied habitats;for example,fish were the main prey for L.apodus from the reef lagoon zone,but second in the bay.Snappers are piscivorous-invertivorous mesopredators;the species that relied the most on fishes were L.griseus and L.jocu,whereas O.chrysurus preferred crustaceans.Stomach content results revealed a high degree of dietary overlap among species.Our findings suggested a tradeoff in relative weight between fish and crustaceans as the main food source of snappers at these connected areas,supporting the hypothesis of niche segregation.Our results can be used as a baseline to further our understanding of the ecology and differences in resource use by snapper species in an area undergoing important anthropogenic changes.

关 键 词：Resource partitioning Chetumal/Corozal bay Quintana Roo Trophic ecology 

分 类 号：Q178.1[生物学—水生生物学] Q95[生物学—普通生物学]