Ovarian maturation and oviposition in kinubari, Pterogobius elapoides [bony fish]

A number of a coastal marine goby, P. elapoides , were reared under two different food conditions. They spawned 2-7 times during 22-82 days. There was no obvious relation between the number of batches and the ration level. Although the mean batch size and weitht of low-ration fish were smaller than those of high ones, the ration level had no effect on the mean dry weight of eggs. Frequency distribution of oocyte diameter of P. elapoides was "bimodal" and the sizes of consecutive batches were much the same. This pattern of maturation and oviposition is termed "bimode-multiple batch spawning".