Length-Weight Relationship of Some Fish Species in a Tropical Rainforest River in South-East Nigeria

Abstract

The Length-Weight relationship of some fish species from Oramiri-Ukwa River, was studied from January to December, 2014. The slope (b) values obtained in the nine species ranged from 1.830 to 5.670 with most of the fishes indicating a negative allometric growth pattern except for Papyrocranus afer, with b value of 3.04, thus showing a positive isometric growth pattern. The following fish species showed a high degree of positive correlation at (P > 0.05); Ctenopoma kingselyae, Alestes imberi, Channa obscura, Oreochromis niloticus, Tilapia mariae, Tilapia zillii, Synodontis omais, and Papyrocranus afer. Chrysichthys auratus did not show this positive correlation. The condition factor (K) of the fish species ranged from 0.99 to 4.54, indicating that most of the fish were in good condition except for Chrysichthys auratus with 0.99.

Some Ichyofauna Status of Lake Geriyo, Adamawa State

“…But not as rich in diversity as that Asejire lake, Southwest Nigeria with twenty-seven (27) species [14] and that of Oramiri-Ukwa river, Southeast Nigeria with twenty-five (25) species [16]. The eighteen (18) species recorded in this present study were higher than the 14 species observed by Ekundayo et al [17] from the same water body.…”

“…River conservation and management activities in most countries suffer from an inadequate knowledge of its biota constituents, especially in large, poorly investigated tropical river systems in Asian and African [8,9], tropical Australian [10] and Amazon regions [11]. The diversity of many water bodies have been investigated by different researchers which include Adeyemi et al [12] on Gbedikere lake, Bassa, Kogi state; Lawson and Olusanya [13] on three tributaries of River Ore, Southwest, Nigeria; Ipinmoroti [14] on Asejire Lake; Dan-Kishiya et al [15] on lower Usuma reservoir in Bwari; Adaka et al [16] on Oramiri-Ukwa river, Southeast Nigeria, Abuja; Ekudayo et al [17]on lake Geriyo, Adamawa state among others.…”

Relative condition factor, length-weight relationship and sex ratio of copper mahseer, Neolissochilus hexagonolepis (McClelland, 1839) from Tamor River, Nepal

“…As with other species, Pervin and Mortuza (2008) investigated the length -weight relationship of a fresh water fish, Labeo boga (Hamilton), from India. Similarly, Abobi (2015), Ozcan and Altun (2015) and Adaka et al (2017) gave an account on the length-weight relationship of fresh water fish species from the rivers of Ghana, Pakistan and Nigeria respectively.…”

LENGTH-WEIGHT RELATIONSHIP AND CONDITION FACTOR OF RIVER SPRATS, Clupeichthys sp. FROM TASIK KENYIR, TERENGGANU, MALAYSIA

“…The length-weight relationship (LWR) and condition factor (K) of fishes is a common and useful analysis to estimate the health and growth of the fishes (Bagenal & Tesch, 1978;Adaka et al, 2015). However, due to the limited and laborious to collect enormous and continuous data from the field, the LWR analysis become crucial for fishery stock assessment (Froese, 2006;Ayoade, 2011).…”