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Morphological divergences as drivers of diet segregation between two sympatric species of Serrapinnus (Characidae: Cheirodontinae) in macrophyte stands in a neotropical floodplain lake. NEOTROPICAL ICHTHYOLOGY 2021. [DOI: 10.1590/1982-0224-2020-0139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract Diet and morphology of Serrapinnus notomelas and Serrapinnus sp.1 were investigated across ontogeny, as a way to elucidate the key elements linked to the resource partitioning (a main driver for species coexistence). Fish sampling was conducted monthly between October 2010 and March 2012. Individuals were captured, identified, and classified into juvenile or adult. Our results show ontogenetic and interspecific differences in feeding abilities and morphological traits. Differences in body shape (relative area of the dorsal fin, length of head, height of the caudal peduncle, the aspect ratio of the pectoral and pelvic fin) favored divergent swimming performances (more maneuverability in S. notomelas and continuous swimming to Serrapinnus sp.1). We also observed divergences in trophic apparatus traits and correlations with different diets. In this context, it is highlighted that understanding the relationship between morphology and diet can assist in elucidating the processes that permeate the coexistence between sympatric species, and between ontogenetic periods. Besides, the relevant contribution of the measures of the trophic apparatus (gill raker length, the number of teeth cuspids, and intestinal coefficient) in trophic segregation seems to be a strong evidence in favor of the proposed discriminatory and predictive capacities of these traits.
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Inclusão do triticale em rações para alevinos de piavuçu, <em>Leporinus macrocephalus</em> (Garavello & Britski, 1988). ACTA SCIENTIARUM: ANIMAL SCIENCES 2008. [DOI: 10.4025/actascianimsci.v23i0.2630] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Farinha de peixe em rações para alevinos de tilápia do Nilo, Oreochromis niloticus (L.), linhagem tailandesa. ACTA SCIENTIARUM: ANIMAL SCIENCES 2008. [DOI: 10.4025/actascianimsci.v23i0.2748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Substituição parcial e total da proteína do farelo de soja pela proteína dos farelos de canola e algodão em dietas para alevinos de piavuçu, <em>Leporinus macrocephalus</em> (Garavello & Britski, 1988). ACTA SCIENTIARUM: ANIMAL SCIENCES 2008. [DOI: 10.4025/actascianimsci.v23i0.2628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Diferentes fontes protéicas de origem vegetal para tilápia do Nilo (Oreochromis niloticus L.) durante a reversão sexual. ACTA SCIENTIARUM: ANIMAL SCIENCES 2004. [DOI: 10.4025/actascianimsci.v26i1.1929] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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