For the first time, a case of autumn spawning has been recorded for the smooth lumpsucker Aptocyclus ventricosus. The larvae were caught in Zhitkova Bay (Peter the Great Bay, Sea of Japan). A comparison of the larvae with individuals of similar size, previously described from other habitats, is given, the hatching and spawning times are calculated in the considered hydrological conditions, and possible reasons for the transition of this species from the usual spring spawning in this region to autumn spawning are considered.
Shelekhov et al. (Wed,) studied this question.
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