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Gophen, Moshe; Yehuda, Yehuda; Malinkov, Anna; Degani, Gad

doi:10.1023/a:1003225210226

Cited by 18 publications

(1 citation statement)

References 20 publications

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“…Many studies show that aquatic oligochaete represent a significant part in the diet of some fish species (RIERA et al 1991, GOPHEN et al 1998, RAHMAN et al 2006. LIETZ (1987) advocated the potential of these animals as live fish food, since they are easily cultivated in large scales and are resistant to variations in temperature and dissolved oxygen levels.…”

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Reproductive cycle of Branchiura sowerbyi (Oligochaeta: Naididae: Tubificinae) cultivated under laboratory conditions

Lobo¹,

Alves²

2011

Zoologia (Curitiba, Impr.)

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ABSTRACT. The biology of Branchiura sowerbyi Beddard, 1892 has been the focus of many studies in temperate regions, where the species is exotic, according to literature data. Due to its high productivity and easy cultivation, B. sowerbyi is of great interest as a food source for fish farming. The present study reports information on the reproductive biology and growth of B. sowerbyi under laboratory conditions at 25 ± 1°C. Weekly observations during 52 weeks indicated that the time between cocoon laying and young hatching was 14 to 16 days, the specific daily growth rate was 0.91 ± 0.04% (mean ± SD) and the time to reach sexual maturity was 40.83 ± 6.88 days. As reported by other authors, the hatching rate observed was low (33.08%), but the survival rate of young was high, approximately 96%. Laboratory observations showed that B. sowerbyi has two annual reproductive cycles, the first (between the 5 th and 24 th week) being more pronounced than the second (between the 31 st and 51 st week) concerning the number of cocoons.

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confidence: 99%