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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Generalist populations formed by generalist individuals: a case of study on the feeding habits of a Neotropical stream fish

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Author(s):
Rafaela Carvalho Neves [1] ; Pedro Paulino Borges [2] ; Jaquelini de Oliveira Zeni [3] ; Lilian Casatti [4] ; Fabrício Barreto Teresa [5]
Total Authors: 5
Affiliation:
[1] Universidade Estadual de Goiás. Laboratório de Biogeografia e Ecologia Aquática - Brasil
[2] Universidade Estadual de Goiás. Laboratório de Biogeografia e Ecologia Aquática - Brasil
[3] Universidade do Estado de Minas Gerais. Laboratório de Ecologia Aquática - Brasil
[4] Universidade Estadual Paulista “Júlio de Mesquita Filho”. Laboratório de Ictiologia - Brasil
[5] Universidade Estadual de Goiás. Laboratório de Biogeografia e Ecologia Aquática - Brasil
Total Affiliations: 5
Document type: Journal article
Source: Acta Limnol. Bras.; v. 33, 2021-09-22.
Abstract

Abstract: Aim We described the diet of the generalist stream fish Knodus chapadae and we tested if the environmental conditions are associated with population’s diet and individual specialization. Methods We analyzed the stomach contents of 287 individuals from 29 streams from the Brazilian savanna (Cerrado). Results The instream physical habitat structure, physiochemical conditions, and adjacent land use explained partially the variation in the diet of populations, but not the variation in the individual specialization. Thus, the diet changes observed at populational level were driven by changes in the average composition of the diet of individuals that, in turn, remained generalists along the environmental gradient. Conclusions Our results show that the trophic opportunism described for small characids was also observed in K. chapadae, whose diet shifts according to changes in environmental conditions. Furthermore, the opportunism expressed at the individual level can explain the trophic plasticity observed on the studied species. (AU)

FAPESP's process: 18/06033-1 - The role of current and historical factors on the patterns of fish beta diversity in agroecosystem streams
Grantee:Jaquelini de Oliveira Zeni
Support Opportunities: Scholarships in Brazil - Post-Doctorate