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Abstract
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Article Information:
The Morphology, Abundance, Condition Factor and Length-weight Relationship of Ethmalosa fimbriata (Bowdish 1825) from Nkoro River Niger Delta, Nigeria
J.F.N. Abowei
Corresponding Author: Abowei Jasper
Submitted: 2009 Sept., 29
Accepted: 2009 Oct., 19
Published: |
Abstract:
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The morphology, abundance, condition factor and length-w eight relationship of Ethmalosa fimbriata
from Nkoro River in the Niger Delta area of Nigeria was studied from January-December 2008. The body
description of E. fimbriata from Nkoro River was; Dorsal spine (total): 0, Dorsal soft rays(total): 16-19, Anal
spine: 0, Anal soft rays: 19-23. The m outh is sharply upw ard and V-shaped. Caudal fin is deep chrome with
long and pointed tips. The upper jaw contains distinct median notch, into which tip of lower jaw fits. Lower
gill rakes are long, fine and numerous, often 3 times as long as gill filaments; upper gill rakes bent. There is
a faint dark spot behind gill cover sometimes followed by others. The dorsal fin tip is black with golden tints
on the body. The scute is 16-19, pre-pelvic, 10-13 post and scales in lateral series is 37-42. The highest catch
was recorded in January (8.16), followed by February (4.21), May (1.65), March (1.40), April (1.11) and
October (1.10). June (0.87), December (0.32), November (0.20) and July (0.14) were less than 1. No catch was
recorded for August and September during the study. T he highest catch per unit effort (5.62) w as recorded in
station 2, followed by station 1 (5.04) and station 4. The least catch per unit effort (3.75) was recorded in station
3 . From a sample size of 1200 specimens, K value was 0.946 and the exponential equation was Wt = 0.162
(TL)3.199, indicating an isometric growth pattern. The highest condition factor value (1.00) was recorded in May
and the lowest (0.6) in September. This was an indication that the beginning of rains favors E. fimbriata than
mid rains.
Key words: Ethmalosa fimbriata, morphology, abundance, condition factor, lenght – weight relationship, Nkoro River, Nigeria
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Cite this Reference:
J.F.N. Abowei, . The Morphology, Abundance, Condition Factor and Length-weight Relationship of Ethmalosa fimbriata (Bowdish 1825) from Nkoro River Niger Delta, Nigeria. Advance Journal of Food Science and Technology, (1): Page No: 51-56.
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ISSN (Online): 2042-4876
ISSN (Print): 2042-4868 |
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