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RBMO 54(2): 221-226

https://doi.org/10.22370/rbmo.2019.54.2.1906

Feeding ecology of fish larvae from Chilean Patagonia during austral winter

Mauricio F. Landaeta1,*, Javier Vera-Duarte1, María José Ochoa-Muñoz1,2, Claudia A. Bustos1 and Fernando Balbontín3

1Laboratorio de Ictioplancton (LABITI), Escuela de Biología Marina, Facultad de Ciencias del Mar y de Recursos Naturales, Universidad de Valparaíso, Avenida Borgoño 16344, Reñaca, Viña del Mar, Chile
2Fundación Ciencia y Divulgación en Ecología Marina y Dulceacuícola (CIDEMAR), Villanelo 180, of. 1405, Viña del Mar, Chile
3Laboratorio de Peces, Escuela de Biología Marina, Facultad de Ciencias del Mar y de Recursos Naturales, Universidad de Valparaíso, Chile

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Resumen

Feeding habits of the ichthyoplankton from Chilean Patagonia (44-46°30’S) were studied during June-July 2012 (austral winter). Ichthyoplankton assemblage was composed by 10 species, with low abundance (3.8 to 16.73 ind. 1000 m-3). Most abundant larvae were Maurolicus parvipinnis, Leptonotus blainvilleanus and Sprattus fuegensis. These three species fed mainly on calanoid copepodites, Paracalanus indicus and Calanus sp. copepodites, and cyphonautes. Trophic overlap among dominant fish larvae was high (Schoener’s D > 0.69) and no significant differences were detected in prey composition and size. Therefore, no resource partitioning occurred in planktonic fish larvae during winter 2012 in Chilean Patagonia.

Palabras clave

Feeding, overlap, ichthyoplankton, prey size
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