Publication Date:
2021-05-19
Description:
Fecundity is one of the important indicators of reproduction biology in fishes especially in rearing and
restocking management of endangered species such as sturgeon. The fecundity of stellate Sturgeon (Acipenser
stellatus Pallas, 1771) was studied in 50 specimens captured by gill net (mesh size= 100 mm) and seine net in
different fishing areas along the southeastern part of the Caspian Sea from October 2004 through June
2005.Some biological characteristics of eggs (including diameter, surface-to-volume ratio of egg) and of fish
(including age, fork length, weight, fecundity and gonadosomatic indices) were determined, and the
relationship between them was defined. The results obtained showed that eggs were in stage F5 of
development, and mean fork length, weight, age, fecundity and gonadosomatic indices were 125.26±8.01 (cm),
10.3±1.97 (kg), 12±1.34 (years), 170730±43211.11 and 20.88±3.19 (%), respectively. Also, the average egg
diameter and surface-to-volume ratio were 2.92±1.44 (mm) and 2.06±0.12 (mm-1), respectively. Positive
correlation was detected between egg diameter and surface, and volume, while negative correlation was found
between egg diameter and surface-to-volume ratio. Weight, length and age have linear relationships with
absolute fecundity and age was the best predicator of fecundity (r2= 0.848, F=27.962 and P value=0.003).
Description:
Published
Keywords:
Relationships
;
Characteristics
;
Acipenser stellatus
;
Biological
;
Eggs
;
Female
;
Fish
;
Sturgeon
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Refereed
Format:
pp.195-203
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