FOOD AND FEEDING HABITS OF MORMYRUS RUME IN OYAN LAKE, OGUN STATE, NIGERIA

RASHEEDAT OMOWUNMI SANNI
Aquaculture and Fisheries Management, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
October, 2014
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Abstract

A research was carried out on the food and feeding habit of Mormyrus rume collected from Oyan Lake, Ogun State, Nigeria were conducted. Thirty specimens were collected from the Lake between June and September. The major fishing method employed for collection was gillnetting. The fish were immediately preserved on iceberg for laboratory analysis, and their total length (cm), standard length (cm), body weight (g), were measured fresh within 24 hours. The total length ranged from 20.9 – 48.7cm with a mean of 31.03 while the standard length from 18.5 – 42.0 with a mean of 27.1. The body weight ranged from 58.0 – 705.0g with a mean of 271.8g. The stomach content was assessed to determine its food and feeding habit using combined methods of frequency of occurrence and numerical analysis. Numerical and Frequency of occurrence methods shows that plant materials were the most abundant food in the diet of M. rume (23.34% and 80.0%, respectively). Other food items of importance consumed by the fish included the green algae which were more abundant than the blue-green algae by number but least importance by occurrence method. The population of females was significantly higher than the males. The condition of each stomach was examined and recorded as the state of fullness of each stomach was expressed as empty ( , one-quarter full ( ), half full ( ), three-quarter ( ) and full ( ) and percentage were 16.7%, 10.0%, 30.0%, 3.3% and 40.0% respectively. Result obtained from this study will contribute to the baseline information for carrying future studies on the production and possible domestication of this species of fish.