Alidor Busanga Kankonda*, Isaac Ekyamba Shabani, Jacob Nsila Ndjaki, Consolate Kaswera, Ernest Lukosha Tambwe and Alain Bolonga Bolonga
Department of Hydrobiology and Aquaculture, University of Kisangani, PO Box: 2012, Kisangani, DR Congo, Africa
Received: 13 February, 2016; Accepted: 08 March, 2016; Published: 10 March, 2016
Kankonda Busanga Alidor, Department of Hydrobiology and Aquaculture, University of Kisangani, BP 2012, Kisangani, DR Congo, Africa, Tel: +243-81-39-86-632; E-mail:
Kankonda AB, Shabani IE, Ndjaki JN, Kaswera C, Tambwe EL, et al. (2016) Preliminary Data on Biology of Stomathorinus Cf Polli Matthes,. Int J Aquac Fishery Sci 2(1): 001-007. DOI: 10.17352/2455-8400.000011
© 2016 Kankonda AB, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Dissolved oxygen (DO); Water Quality Index (WQI); Aila
Background and aim: Stomatorhinus cf polli, one of species of Mormyridae whose flesh is highly appreciated by local communities. Unfortunately, there is very little information about biology and ecology of Stomatorhinus cf polli. This study aimed to determine the ecology and biology of Stomathorinus cf polli.
Methods: The circular dip scoop net of 0.5 mm of mesh and the amplifier were used during twelve months. 260 specimens of Mormyridae were collected in a single site of Masendula stream. All fish samples were weighed using scales, as well as each fish were measured using a tape measure and caliper. Diet and reproduction were analyzed.
Results: The analysis of 151 stomach contents of Stomatorhinus cf polli allowed identifying three prey categories (animal detritus, vegetable detritus and chironomidae). The diet of Stomatorhinus cf polli expressed in the coefficient of occurrence showed that individuals feed the same prey but in different proportions. The mean intestinal coefficient calculated for specimens of Stomatorhinus cf polli is 0.58. This species prefers more to consume animal detritus. For reproduction, the findings showed that this species breeds throughout the year. The mean relative fecundity is 25,125 oocytes per kg.
Mormyridae are one of the largest fish groups of the Masendula stream. Although many publications and other works have been focused on their systematics [1,2], but there are few works on their reproduction and diet [3,4]. The study of the diet by stomach content analysis allows to solve primarily the issue of food resources in a qualitative and quantitative way, understand if in natural environments, the diverse species of the same group have an individualized diet or not and compare food relations existing between the species studied. This involves the concept of ecological niche as well as food specialization of Stomathorinus cf polli (Figure 1).