Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Journal of Fisheries and Aquatic Science
  Year: 2016 | Volume: 11 | Issue: 1 | Page No.: 43-55
DOI: 10.3923/jfas.2016.43.55
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Reproductive Biology of Hilsa Shad Tenualosa ilisha (Teleostei: Clupeidae) During Spawning Migration in the Shatt Al Arab River and Southern Al Hammar Marsh, Basra, Iraq

Mustafa Ahmed Almukhtar , Watfa Jasim and Falah Mutlak

Abstract:
Aspects of the reproductive biology of Hilsa shad, Tenualosa ilisha from Shatt al Arab river and Southern Al Hammar Marsh during spawning migration have been investigated from the period of April 2013 to March 2014. A total of 1456 specimens were collected using gillnets and landings. The size range of the specimens collected throughout the migration season was 50-460 mm in Total Length (TL). Males were dominant in the smaller lengths, while females did in the larger lengths. The monthly variation in mean length for both sexes showed two distinct peaks, the first was during February-March and the second during September-November. The overall sex ratio showed that females were dominating (1:1.7). The sex ratio varied both spatially and seasonally. Monthly variations in Gonad Somatic Index (GSI) and Dobriyal index indicated that Hilsa shad had a long spawning season with two distinct peaks in April and November. Macroscopic observations of gonads showed six maturity stages. The spatial occurrence of maturity stages suggested that Hilsa shad spawn in all the stations of Shatt al Arab river. The size at 50% maturity was 210 mm for females and 170 for males. The absolute fecundity ranged from 223750-1477780 eggs for fishes with total length range of 200-450 mm and mean weight range of 246.3-891.7 g. The relative fecundity for the same length and weight group ranged from 900.5-1657.1 egg/g. The relationship between absolute fecundity (AF) and total length was AF = 0.007×TL3.129 (R2 = 0.97, n = 62) and that between AF and body weight (Bw) was, AF = 190×Bw1.327 (R2 = 0.95, n = 62).
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    Population Dynamics of Male and Female Hilsa, Tenualosa ilisha of Bangladesh
  •    Population Dynamics and Stock Assessment of Hilsa Shad, Tenualosa ilisha in Iran (Khuzestan Province)
  •    Gonad Maturation Stages of Auchenoglanis occidentalis (Valenciennes 1840) in River Rima, North-Western Nigeria
How to cite this article:

Mustafa Ahmed Almukhtar, Watfa Jasim and Falah Mutlak, 2016. Reproductive Biology of Hilsa Shad Tenualosa ilisha (Teleostei: Clupeidae) During Spawning Migration in the Shatt Al Arab River and Southern Al Hammar Marsh, Basra, Iraq. Journal of Fisheries and Aquatic Science, 11: 43-55.

DOI: 10.3923/jfas.2016.43.55

URL: https://scialert.net/abstract/?doi=jfas.2016.43.55

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

Curve Bottom