Study of some reproductive parameters of Aphaniops hormuzensis (Teimori, Esmaeili, Hamidan & Reichenbacher, 2018) in Mehran River

The aim of this study was investigation of some reproductive traits of Aphaniops hormuzensis in the Mehran River. Of 664 recorded individuals, 290 specimens were male (43.67%), and 374 specimens were female (56.32%). The sex ratio (females/males) was 1.28:1 (P<0.05). The smallest and biggest size of fish were 19.8 mm and 45.7 mm, respectively which belonged to female. Both sexes showed negative allometric growth. Fecundity ranged from 4 (total length 22 mm, weight 0.36 g) to 73 (total length 45.7 mm, weight 2.3 g) eggs per individual. The highest value of GSI obtained in April (14.32±5.18). This fish had actively breeding during March to October with a remarkable peak in spring. Asymptotic length (L∞), growth rate (k) and t0 were 45.69 mm, 0.73 per year, and -1.19 for males, respectively and 47.05 mm, 0.72 per year and -1.2 for females. The obtained results of this study can be used for determining the strategies for further conservation and management policies of this species with the aim of preserving the biodiversity.