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Cybium,
International
Journal of Ichthyology |
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The reproductive cycle of Ophichthus rufus (Anguilliformes) in the Northwest Mediterranean M. CASADEVALL (1), M. MUÑOZ (1), M. CARRASSON (2) & J. MATALLANAS (2) (1) Departament
de Ciències Ambientals, Facultat de Ciències, Universitat
de Girona, Campus de Montilivi, 17071 Girona, SPAIN. Abstract.
- The reproductive biology of the Mediterranean snake eel, Ophichthus
rufus (Ophichthidae), was studied on the basis of microscopic and
macroscopic analysis. Results show that O. rufus is an ovuliparous
species with a group synchronous ovary type. The maturation process of
the gonads starts in December and progress untill August, when ovulation
and spawning take place. It is a fractional spawner with buoyant eggs.
Potential annual fecundity estimates ranged from 1426 to 23,605 oocytes.
Except for small sizes, a clear predominance of females was observed. Key-words. - Ophichthidae - Ophichthus rufus - MED - Reproduction - Ovogenesis - Gonadosomatic index - Fecundity. |
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