Inventory and Impact of Dominant Fishing Gear and Method in Eleyele Lake Oyo State, Nigeria | Chapter 11 | Current Perspectives to Environment and Climate Change Vol. 2
Gill nets fishery are potentially
selective and therefore use as a sampling gear if mesh sizes are rightly chosen
in order to conserve the young and developing fishes. The fishing potential of
derelict passive gill net poses irreversible and economic loss on the aquatic
ecosystem and fishermen respectively. There by contributing to biological
assets loss and capable of causing navigational hazard. Precautionary approach
towards Conserving and sustaining renewable aquatic resources is the best for
exploitation of the cheapest sources of animal protein in sub-Sahara region.
This paper gives inventory of the existing fishing gears and methods commonly
in use, impacts of gill net fishery in terms of mesh sizes selectivity, catch
per unit effort, fishing profitability index
in Eleyele Lake Ibadan and artificial fish aggregating device potential
of derelict gill net in Oyo State resident Waters . A total of 539 fishing
gears were encountered in six sampled areas of two strata; gill nets, traps,
cast nets, dragnets and long - line (baited and un-baited). Gillnets accounted
for 36% in the strata. Apparently,
stratum 1 had 159 and stratum 2 had 33 units of gill net; descriptive
statistics showed Wide variation in the total fishing gears and methods
observed in the strata and X2 (Chi square) showed significant (P>
0.01) in the numerical strength of gill nets and less significant (P> 0.01)
of legal mesh sizes usage. The most caught species was tilapia, 57.7% by number
and 33.8% by weight of the total catch and were not sizable with mean weight of
203 g of the total catch. Gill net fishery of Eleyele Lake comprises of legal
and illegal mesh sizes of which the later accounted for 48% of 192 and its use
accounted for over 58.7% by number and 20% by weight of the entire fish caught.
This paper provides effects of catching process of gill net fishery in Eleyele
Lake resulted into yields with wider variation across genera and species of
fish caught (mean=341.5, S.D=229.2) and fetches its production cost about 12.23
times in a life span. Causes, and management initiatives; Preventive and
curative of derelict gear for public awareness and change of attitude on the
part of fishermen before concomitant irreversible ecological problem of ghost
fishing.
Author(s) Details
Adedokun, Mathew Adewale
Department of Animal Health
and Production Technology (Fisheries Unit), The Oke-Ogun Polytechnic, P.O. Box
021, Saki, Oyo State Nigeria.
A. O. Ayanboye
Department of Aquaculture
and Aquatic Resources Management, Osun State University, Osogbo, Nigeria.
O. B. Adelodun
Department of Fisheries
Technology, Oyo State College of Agriculture and Technology, P.M.B. 10,
Igboora, Nigeria.
T. A. Kolawole
Department of Science
Laboratory Technology, Oyo State College of Agriculture and Technology, P.M.B.
10, Igboora, Nigeria.
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