Diet and Reproduction of tigertooth croaker (Otolithes ruber, Bloch and Schneider, 1801) in the shores of the Oman Sea (Jask area)

The diet and reproduction of tigertooth croaker (Otolithes ruber) during the 12-month sampling period were studied from August2016 to July 2017in the shores of the Oman Sea (Jask area). A total of 600 fishes were biosensor and autopsy. The mean of conditional factors and severity of nutrition index were 1.01 and 307.66 respectively. The gastric stomach index for males and females was 45.63 and 37.64, respectively. Also, the hunting indexes for the fish bait,  squid baits and the shrimp bait were  75% ,11.6% , 10.2% respectively. In the study of food items found in the stomach, the diet of the fishes is a wide range of bony fish (a variety of Sciaenidae, Sillaginidae, Clupeidae, Threadfin fishes and skeletons of fish), mollusca (shrimp and Mantis), and Squids were formed. Also, the results showed that fish catches are the dominant source of fish in terms of the importance and prevalence of caught prey. Sex ratio of female to male was 1 to 0.72 and the oviposition period (oviposition season) was observed for this species in spring.