Artículos de revistas
Influência do fotoperíodo no crescimento e sobrevivência de póslarvas de piracanjuba Brycon orbignyanus (Valenciennes, 1849) (Osteichthyes, Characidae)
Fecha
2002-12-01Registro en:
Acta Scientiarum - Biological and Health Sciences, v. 24, n. 2, p. 439-443, 2002.
1415-6814
10.4025/actascibiolsci.v24i0.2317
2-s2.0-0036935189
2-s2.0-0036935189.pdf
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal de Santa Catarina (UFSC)
Laboratório de Biologia e Cultivo de Peixes de Água Doce (LAPAD)
Fundação de Amparo à Pesquisa e Extensão Universitária (FAPEU)
Institución
Resumen
This paper aims at studying the influence of photoperiod on the cultivation of Brycon orbignyanus (Valenciennes, 1849) (Osteichthyes, Characidae) post-larvae submitted to four treatments: 0L-24D (L=Light; D=Dark), 10 - L14D, 14L - 10D and 24L-0D, with 3 repetitions. Post-larvae measuring 7.8±0.7mm and weighting 3.5±0.8mg were distributed in 12 aquariums (10L), stocked with 12 post-larvae per aquarium. Fishes were fed daily with Artemia sp. nanplii, in 10 days experiment. A positive relationship between the survival rate (88.9±9.7%) observed in the treatment with 24 hours of luminosity, and the lowest (58.3±8.3%), in the treatment with 24 hours of darkness. No difference was showed (P>0.05) in the mean length and weight of the post-larvae, although there was greater heterogeneity among the post-larvae cultivated at the longer darkness period.