Some Biological Aspects of the Himri Barbel, Barbus luteus, in the Intermediate Reaches of the Euphrates River

Authors : Ramez Al HAZZAA

Pages : 311-315

View : 19 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Growth; length-weight, standard-, fork-, and total length relationships; age composition; sex ratios; age at first maturity; and fecundity of the himri, Barbus luteus, from different sites along the middle reaches of the Euphrates River were investigated. Von Bertalanffy`s growth models were Lt = 54.71 insert ignore into journalissuearticles values(1-e0.110 insert ignore into journalissuearticles values(t+0.163););, Wt = 1252.833 insert ignore into journalissuearticles values(1-e0.127 insert ignore into journalissuearticles values(t+1.825););2.454 in males, and Lt = 56.93 insert ignore into journalissuearticles values(1-e0.105 insert ignore into journalissuearticles values(t+0.377););, Wt = 1395.363 insert ignore into journalissuearticles values(1-e0.107 insert ignore into journalissuearticles values(t-1.81););2.545 in females. Isometric growth was identified from length-weight relationships. Younger age groups dominated the catches, with identifiable ages ranged from II to VII years. Sexual ratios were unbiased and did not deviate from 1:1. Most fish reached sexual maturity within the second year of age.
Keywords : Barbus luteus, growth, fecundity, Euphrates River