Feeding habits variability of Lutjanus synagris and Lutjanus griseus in the littoral of Campeche, Mexico: an approach of food web trophic interactions between two snapper species

• DOI: 10.3856/vol48-issue4-fulltext-2453
• Publication Date: 2020-09-02T01:15:56Z
• Authors: Paloma G. Juárez-...; Atahualpa Sosa-López; Yassir Edén Torre...; Edgar Fernando Me...; Sergio Aguiñiga G...
• Keywords: Lutjanidae

The study of the feeding habits variability (spatial and temporal scales) allows us to evaluate trophic interactions between species, thus, short long-term effects removal different species by presence phenomena. In this study, we carried out stable isotope (δ13C δ15N) stomach content analyses infer linkages two snapper (Lutjanus synagris Lutjanus griseus) captured in littoral Campeche, Mexico. total, 781 specimens were collected (528 L. 253 based on relative importance index [%PSIRI] both consumed prey-specific (PSIRI), Penaeidae family (PSIRI = 23.41%) was most important diet synagris, while Callinectes sapidus 21.45%) primary prey griseus. isotopic indicated that feed coastal-marine (δ15N: 10.6 12.1‰ δ13C: -15.7 -12.7‰); however, according PERMANOVA, low similarity found (R 0.07, P < 0.01), also, significant differences detected δ15N δ13C values Therefore, despite presents similar positions (L. synagris: 4.2 ± 0.2; griseus: 3.9 0.1) behavior (according SIBER opportunistic predators), a overlap observed, probably associated with differential use habitat coastal zone; where is ecologically fed areas seagrass, griseus intermittent pasture mangrove areas, therefore, role each crucial dynamics ecosystems as predators potential structuring populations their prey.