Koya and Iwase, 2004



Citation


Koya, Y. and Iwase, A. (2004) Annual reproductive cycle and rate of the spermatogenic process in male mosquitofish Gambusia affinis. Ichthyol. Res., pp. 131-136

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Gambusia affinis Male Onset of spermatogenesis Early May ['May']
Gambusia affinis Male Maximum GSI value 3.8 [June to July] 3.8 percent
Gambusia affinis Male Main spermatogenesis activity Mid-May to early June [Increase from 0.9-3.2%] ['May', 'June']
Gambusia affinis Female Oocyte development Viviparous No category
Gambusia affinis Male Resting period Resting period is October to April [The GSI values (0.9-2.1%) from January to May] 1.5 months