Parental Fin Digging by Cichlasoma octofasciatum (Teleostei: Cichlidae) and the Effect of Parents' Satiation State on Brood Provisioning

Authors

  • Dmitry D. Zworykin

    Corresponding author
    1. Laboratory of Lower Vertebrates Behaviour, A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow
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Laboratory of Lower Vertebrates Behaviour, A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky prospect 33, Moscow, 117071, Russia. E-mail: irene@irene.msk.ru

Abstract

Although parental care in fishes does not usually include provisioning offspring after hatching, various types of brood provisioning have been documented for some bony fishes, and in particular, for cichlids. For example, fin digging occurs among biparental substrate brooding cichlids of the ‘genus’ Cichlasoma sensu lato. Parental fin digging by Cichlasoma octofasciatum was investigated under laboratory conditions. Fin digging was performed significantly more often by females than by males. For both sexes, the frequency of fin digging increased significantly with brood age, especially from ages 3 to 10 d of fry: this was more pronounced in females. The parents' own current satiation state during performance of fin digging influenced the fin digging frequency: for both sexes it was higher in hungry than in satiated parents.

Ancillary