Ameer Suood Alwan Hamad*(1) and Nehad Khorsheed Wahab(2)
(1). Department. of Agricultural Research, Ministry of Agriculture, Iraq.
(2). Animal production Department, Faculty of Agriculture, Tikrit University, Iraq.
(*Corresponding author: Ameer Suood Alwan Hamad. E-Mail: ameer.suood@yahoo.com).
Received: 02/07/2019 Accepted: 27/08/2019
Abstract
Growth and reproduction of largemouth Bennini Cyprinion macrostomum was studied in Tigris river in Tikrit region, Iraq, during September 2013 to June 2014. 459 fish were collected, and the total length ranged between 11.8-24.7 cm and their total weight ranged from 19.9 to 184.58 g. The group of length of 14-16 cm accounted the largest percentage 40.52% of total fishing (1549) in September. The value of b=2.99 means that the growth was isometric. The condition factor ranged between 0.73-2.67 with average of 1.22. Condition factor differed according to sex and length. Sex ratio (male: female) tended to female 1:1.57. The highest gonadosomatic index for female was 7.17 and for male was 2.69 in June and the spawning period extended from May and June until August. The smallest length of a mature male reached 13.1 cm and in a mature female was 19.3 cm.
Key words: Growth, Reproduction, Cyprinion macrostomum, Tigris river, Iraq.
Full paper in Arabic: PDF