Some Biological Aspect of the Smallest Goby Fish (Knipowitschia caucasica Berg , 1916) in Gorgan Bay, Caspian Sea

This research was conducted in Gorgan Bay in 1994. The results showed that spawning of Goby fish, in southern part of Caspian Sea in the area of Gorgan Bay, from early winter to early spring had been gradually. the bigest nun fish in length which caught was 46 . There was positive corellation between length and body weight in males and females and this ratio was higher in females than males. Fishes had positive alometric growth over all male to female ratio was 1-1.1. The range of relative fecundity was 290 to 550 eggs and in average 395.5 which was depended on the length of fish. Keyword