Journal of Aquatic Sciences 30 (2):353-362 (2015) DOI: http://dx.doi.org/10.4314/jas.v30i2.6
FOOD OF Pellonula leonensis (Boulenger, 1916) IN OGBOBIRI RIVER, AMASSOMA, BAYELSA STATE, NIGERIA
A. J. T. OTOBOTEKERE AND E. DUKE
Department of Fisheries and Aquatic Studies/Animal Science,
Faculty of Agriculture, Niger Delta University, Amassoma, Bayelsa State, Nigeria
The food of Pellonula leonensis was studied as on-going investigation of clupeids in freshwaters, especially the Nun River and its catchment area in the Niger Delta, Nigeria. The stomach contents of 160 specimens ranging from 30 mm-70 mm in total length, collected with Attalla liftnet from Ogobiri River around Amassoma, Bayelsa State, Nigeria were analysed using the numerical and frequency of occurrence methods. P. leonensis fed on a variety of organisms, with insects as the dominant food item constituting 36% of the number of the food items and occurred in 63% of the stomachs. Cladocerans comprised 32%for numbers and 55% for frequency of occurrence; rotifers contributed 14% for numbers and 38%for frequency of occurrence and copepods constituted 13% for numbers and 38% for frequency of occurrence. Virtually all food items were found in the different size groups analyzed, indicating P. leonensis as a versatile feeder, feeding on available food items.
Key Words: Stomach contents, diets, Pellonula leonensis, Ogobiri River, Niger Delta