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Tecnica simples de marcacao externa de reprodutores de tilapia nilotica (Oreochromis niloticus)

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journal contribution
posted on 2002-01-01, 00:00 authored by E Leboute, Luis AfonsoLuis Afonso, M Rotta
With the goal of organizing a control program of Nile tilapia (Oreochromis niloticus) reproduction in laboratory, a tecnique with ceramic pearls held on dorsal musculature by transfixion with flexible sintetic string was developed. Sixty fishes with 12g average weight and 60 with 19g average weight were used. Marking was done on three positions: frontal (F), median (M), and caudal (C). Different combinations of three collored pearls were fixed on the right side (defining number), and were linked to only one pearl in the left side (defining sex), with a slack of about 1.5cm to prevent growth damage. The animals were individually identified and weigthed at 30, 60 and 130 days after surgery. Results showed that both F and M positions allowed normal growth and reproductive behavior, whereas the C position induced mortality and loss of marker in some specimens. The M position is recomended as the best, or the intermediate between F and M positions.

History

Journal

Ciência rural

Volume

32

Pagination

147 - 149

Location

Santa Maria, Brasil

Open access

  • Yes

ISSN

0103-8478

Language

por

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2002, Centro

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