Seasonality of the feeding behavior and condition factor of Anchovia surinamensis in the floodplains of the Madeira River (Rondônia, Brazil)

  • Raniere Garcez Costa SOUSA Universidade Federal de Rondônia – UNIR, Departamento de Ciências Pesqueiras, Programa de Pós-Graduação em Ciências Ambientais – PGCA. http://orcid.org/0000-0002-5620-389X
  • Jaine Albino ALVES Universidade Federal de Rondônia – UNIR, Departamento de Zootecnia, Grupo de Pesquisa Pesca Aquicultura e Ecologia de Peixes de Águas Interiores (PAEPAI). http://orcid.org/0000-0001-9203-1346
  • Rodrigo Vieira Alves AMARAL Universidade Federal de Rondônia – UNIR, Grupo de Pesquisa em Síntese Orgânica da Região Amazônica – LASORA. http://orcid.org/0000-0001-5539-149X
  • Severino Adriano de Oliveira LIMA Universidade Federal de Rondônia – UNIR, Departamento de Ciências Pesqueiras. http://orcid.org/0000-0001-6495-5453

Abstract

The Anchovia surinamensis (Clupeiformes: Engraulidae) is known in Brazil as “sardinha-do-gato” and exists in the floodplains throughout Latin-America. It is highly appreciated by the Amazonian riverine communities as a source of animal protein. In this study, we analyzed the dietary preferences and abiotic parameters that influence the condition factor of A. surinamensis that inhabit Cujubim Lake during periods of drought and flood. A total of 105 specimens were captured using three batteries of monofilament nylon nets (measuring 20 m long, 2.5 m high, 40, 60, 80 and 100 mm mesh, measured between opposite knots). The nets were arranged in pre-established positions within the lake and inspected at the times of 18:00, 00:00, 06:00 and 12:00 h. This methodology was utilized to obtain the largest range of fish sizes and to avoid the influence of the nictimeral factor. The results of the analysis of the stomach contents of the individuals confirmed that the species is planktivorous and consumes mainly cladocera and bivalves in the Cujubim Lake, which indicates that there is good food availability in the lake. Our results also demonstrate that, among the physicochemical parameters of the water in Cujubim Lake, pH was the one that most affected the condition factor of A. surinamensis.

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Published
2022-05-20
How to Cite
SOUSA, Raniere Garcez Costa et al. Seasonality of the feeding behavior and condition factor of Anchovia surinamensis in the floodplains of the Madeira River (Rondônia, Brazil). Boletim do Instituto de Pesca, [S.l.], v. 48, may 2022. ISSN 1678-2305. Available at: <https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1684>. Date accessed: 26 june 2022. doi: https://doi.org/10.20950/1678-2305/bip.2022.48.e682.
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Short Communication