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Abstract
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Article Information:
The Abundance, Condition Factor and Length-weight Relationship of Cynoglossus senegalensis (Kaup, 1858) from Nkoro River Niger Delta, Nigeria
J.F.N. Abowei
Corresponding Author: Abowei Jasper
Submitted: 2009 Sept., 30
Accepted: 2009 Oct., 19
Published: |
Abstract:
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The abundance, condition factor and length-w eight relationship of C. senegalensis from Nkoro River
in the Niger Delta area of Nigeria was studied from January-December 2008. The fishery of the flat fish
tonguefish is highly commercial and marketed fresh, smoked or dried. Apart from being a cheap source of
highly nutritive protein, it also contains other essential nutrients required by the body. No work has been done
on the length-weight relationship of Cynoglossus senegalensis from the Nkoro River. A study of the abundance,
condition factor and length-weight relationship of C. senegalensis from the Nkoro River adds more information
on the family, Cynoglosidae to compliment the existing data in the management and culture of the species in
the Nkoro River, Niger Delta. This is essential for formulation of development plan in the fishing industry.
Nkoro River is economically important and rich in biodiversity. Numerous activities such as oil exploration
and production and agricultural activities go on in the region. Most of Nigeria’s oil and gas reserves and
production, which account for over 80% federal government’s revenue, are located within the Niger Delta
region. The highest catch was recorded in December (2.45), followed by January (1.60), June and July (1.10),
April (0.92), February (0.81), March (0.64) and August(0.12). May, September, October and November
recorded no catch during the study. The highest catch per unit effort (2.79) was recorded in station 2, followed
by station 1 (2.78) and station 3 and 4 (1.01 each). From a sample size of 1800 specimens, K value was 1.00
and the exponential equation was Wt = 0.0326 (TL)3.066, indicating an isometric growth pattern. The highest
monthly condition factor value (1.5) was recorded in May and the lowest (0.5) in September. C. senegalensis
in Nkoro river is in a stable environment and was more abuntant in the dry season months of December and
January.
Key words: Cynoglossus senegalensis, abundance, condition factor, length- weight relationship, Nkoro River, Nigeria,
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Cite this Reference:
J.F.N. Abowei, . The Abundance, Condition Factor and Length-weight Relationship of Cynoglossus senegalensis (Kaup, 1858) from Nkoro River Niger Delta, Nigeria. Advance Journal of Food Science and Technology, (1): Page No: 57-62.
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ISSN (Online): 2042-4876
ISSN (Print): 2042-4868 |
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