Kirkuk University Journal for Agricultural Sciences (KUJAS)

Seasonal variation and some biological aspects of Tilapia (Oreochromis aureus) in the Eastern Drain / Salah Al – deen / Iraq

https://doi.org/10.58928/ku20.11203
Volume 11, Issue 2
Spring 2020
Page 23-29
Kirkuk University Journal for Agricultural Sciences (KUJAS)

Document Type : Research Paper

Authors

Saddam Mohammed Hassan
Nehad Khorshid Wahab

Tikrit University /Agriculture College/ Animal Production Department

Abstract
The fish samples collected by electric fishing trap from march till December 2018 from the Eastern drain / Salah Al –deen , Iraq. Some biological aspects and seasonal variation of Tilapia (Oreochromis aureus) were studied. The relationship between the total length and weight for all seasons were (semi - Isometric) with value of regression (b) 3.073, A negative relationship (2.976, 2.888 and 3.119 for spring, summer and autumn respectively. The condition factors were (2.15, 1.96 and 2.007 for all seasons respectively. The linear relationship between total length
and other body dimensions were high correlation except height of pectoral fin and the distance after pelvic fin, Food components investigated, it was found that algae represent more than half of the contents in the gut for blue tilapia by points method 51.46 % and 92.31 % in frequency of occurrence method.

Keywords

Tilapia
seasonal variation
condition factor
linear correlation
Subjects

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