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The Abundance, Condition Factor and Length-weight Relationship of Cynoglossus senegalensis (Kaup, 1858) from Nkoro River Niger Delta, Nigeria
並列摘要
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.
延伸閱讀
- Abowei, J. F. N. (2010). The Condition Factor, Length-Weight Relationship and Abundance of Elops seneganensis (Regan, 1909) from Nkoro River, Niger Delta, Nigeria. Advance Journal of Food Science and Technology, 2(1), 16-21. https://www.airitilibrary.com/Article/Detail?DocID=20424876-201001-201009060052-201009060052-16-21
- Abowei, J., & George, A. (2010). The Morphology, Abundance, Size and Sex Distribution of Callinectes amnicola (De Rochebrune, 1883) from Okpoka Creek, Niger Delta, Nigeria. Current Research Journal of Biological Sciences, 2(1), 27-34. https://www.airitilibrary.com/Article/Detail?DocID=20410778-201001-201009060066-201009060066-27-34
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- Abowei, J. F. N. (2010). The Condition Factor, Length-Weight Relationship and Abundance of Ilisha africana (Block, 1795) from Nkoro River Niger Delta, Nigeria. Advance Journal of Food Science and Technology, 2(1), 6-11. https://www.airitilibrary.com/Article/Detail?DocID=20424876-201001-201009060052-201009060052-6-11
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