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Pesquisa Agropecuária Brasileira

versão impressa ISSN 0100-204X

Resumo

HONJI, Renato Massaaki; CANEPPELE, Danilo  e  MOREIRA, Renata Guimarães. Macroscopic characterization of gonads during induced breeding in captivity of surubim-do-paraíba. Pesq. agropec. bras. [online]. 2013, vol.48, n.8, pp.1110-1114. ISSN 0100-204X.  http://dx.doi.org/10.1590/S0100-204X2013000800042.

The objective of this work was to describe the morphology of the gonads of surubim-do-paraíba (F1) during induced breeding in captivity. Thirty females were induced to reproduction using carp pituitary extract and human chorionic gonadotropin. Twenty-eight females responded to the induction, releasing 238.80 g of oocytes (fertilization rate: 24.33±8.35%). After stripping of gametes, the animals were euthanized for the morphological analysis of the gonads. Testicles did not present morphological alteration after induction. Among ovaries, 63.31% showed malformation (uneven, not uniform development or "narrowing"), and the number of released oocytes was below the obtained in wild broodstock of this species.

Palavras-chave : Steindachneridion parahybae; ovaries; Paraíba do Sul River; testicles.

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