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Size at hatching and incubation period of Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) bred in captivity at the Temaiken Aquarium

2007; Wiley; Volume: 70; Issue: 2 Linguagem: Inglês

10.1111/j.1095-8649.2007.01332.x

ISSN

1095-8649

Autores

Julieta A. Jañez, María Cruz Sueiro,

Tópico(s)

Fish Ecology and Management Studies

Resumo

Two mature Sympterygia bonapartii held in captivity laid a total of 136 egg cases, 33 of them were incubated at constant temperature (16·5° C), salinity (36) and photoperiod (12L:12D). The hatching rate was 100%. Juvenile fish hatched after 135 ± 10 days (mean ± s . d .) and the mean total length, disc width and mass at hatching were 140 mm, 86 mm and 15·1 g respectively.

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