Descriptions and articles about the African Carp, scientifically known as Labeo senegalensis in the Encyclopedia of Life. Includes Overview; Comprehensive De. L. senegalensis Valenciennes, BMNH , 1 specimen, Comoé River, Côte d’Ivoire ; BMNH , 1 specimen, Pendjari River, Benin. Labeo senegalensis Valenciennes in Cuvier and Valenciennes, Taxonomic Serial No.: (Download Help) Labeo senegalensis TSN
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This study investigated some aspect of the biology of Labeo coubie Ruppell, and Labeo senegalensis Valenciennes, from lower River Benue between June and September The length-weight relationship, laheo factor, and feeding habits of fish samples were determined. Length-weight relationship revealed isometric growth in both sexes of L.
Condition factor analysis indicates the suitability of the environment for the species. Nutritional trials should be conducted using wild fingerlings to evaluate domestication potentials of these fish. In sub Saharan Africa, fishing activity is usually not monitored leading to the excessive use of obnoxious senegalehsis practice and deliberate disposal of toxic and hazardous chemicals into water bodies.
This has resulted in significant loss of aquatic lifehabitats destruction and generally reduction in fish yield Adeyemo,Solomon et al. Currently many fish resources in Africa are depleted; inadequate management and unscrupulous practices is threatening aquatic life and natural habitats Adeyemo,there is an urgent need to take appropriate measures to mitigate continuous loss of aquatic lives. Sebegalensis to Umaru et al. One of the important aspects of fish that needs to be focused for a successful domestication program includes aspect of the biology of senealensis fish.
Okafor et al rightly opined that most commercially important fish species have not been successful cultured on a commercial scale due to insufficient knowledge of the biology of these fishes, hence, in order to cultivate any of these fish species successfully in captivity, a good knowledge of their biology is important. Senehalensis on fish biology are indispensible aspect of sustainable management and senegalrnsis of fish biodiversity Solomon et al.
One of the most commonly estimated biological aspects of fish is the length-weight relationship and condition factor Mendes et al.
According to Gulland,Sumbuloglu and Sumbuloglu and King,length-weight relationship is an important factor in biological study and their stock assessments of fishes as it literarily describes the functional regime in weight distribution per unit size of sub-population. Condition factor is also important for assessing the relative wellbeing of the fish population Kulbicki et al. Adeyemi further opined that length-weight relationships can be used to assess growth fluctuations due to changes in food composition, environmental variables, and spawning conditions among other factor.
Another aspect of fish biology that needs to be studied for a successful domestication program is the feeding habit of the fish. According to Woottonfood and feeding habits are indispensable part of biological and taxonomic studies, because it is an essential function of an organism as growth, development and reproduction are all-dependent on energy that enters an organism in the form of food. Pius and Benedicta further stated that the assessment of the stomach content of a fish reduce intra and inter specific competition for ecological niche as it is vital in providing straight forward models of stomach content and feeding dynamics.
Therefore, it is important to understand the spectrum of food preferred by the fish in the wild so as to adopt same in captivity. Four species of this genus are largely found in rivers and they includes, Labeo senegalensisLabeo pseudocoubie, Labeo rhohita, and Labeo coubieof these four species recorded in Africa, Labeo coubie is about the most common and can grow to about mm in length and 10kg in weight Idodo-umeh,Ayotunde et al.
They are highly valued fish food in African countries and usually known for their sweet tastes and rich source of protein Rahman,Ayotunde et al.
In a bid to conserve wild stock of two importantly exploited species of this genus in River Benue Labeo coubie and Labeo senegalensisthis study was designed to investigate some aspects of the biology of those fishes so as to provide background information for possible domestication of the fishes.
African Journal of Aquatic Science
The town is divided into the North and the South bank by the River Benue. The river contains several species of fish which are of high economic importance to the people of Benue State, notable among these species is the Labeo coubie and Labeo senegalensishence their choice for this study. Map of Makurdi showing location of the study areas of sample collection. Fish sample for this study were obtained from fishermen at three major landing sites in Makurdi.
The fishing gears used by the fishermen in catching the fish includes; traps, seine nets, cast net, gill nets, clap nets, hooks and line, while crafts were basically canoe and calabash. Target species for the study Labeo coubie and Labeo senegalensis were randomly sampled at each site every fortnight over a period of four months June — September at this time fish abundance is high.
Sampling time was between 6: Collected samples were fixed in ice chest and moved to the Department of Fisheries and Aquaculture University of Agriculture Makurdi for data collection of biometric, sexing and observation of the stomach content. A total of fish specimens each of Labeo coubie and Labeo senegalensis were obtained from fishermen at the fish landing sites.
The total and standard lengths of each fish species were measured in centimeters cm using a meter rule, while the weight were taken in grams g using an electronic weighing balance. Individual stomach contents were emptied into separate petri-dishes. While some stomach contents were identified macroscopically, others were identified microscopically using a light microscope. The component food items were identified using identification guide provided in the laboratory of the Department of Fisheries and Aquaculture University of Agriculture Makurdi.
The food items encountered were analyzed using frequency of occurrence method Hynes, and point method Cortes, as stated in the formulae below.
Catalogue of Life : Labeo senegalensis Valenciennes,
Percentages gotten from these two methods were pulled together and the means and standard error determined. The fishes of the various species were separated into male and female using specific features that were peculiar to the different sexes. These features include shape of the reproductive organ and presence of nubs on the abdominal segment. Sex ratio of each species was then determined by counting the number of male and female specimens of each species sampled in the period of study and expressed as ratio as stated below.
The data analysis was carried out using Minitab 14 software. Test for goodness of fit was determined statistically using Chi- square x2 test on sex ratio.
The biometric parameters measured in this study are shown in Table 1 ; total length of male and female Labeo coubie ranges from Mean values recorded were higher in males The standard length recorded in all the fish sampled ranges from Weight was significantly higher in male L.
Length and weight distribution of Labeo coubie and Labeo senegalensis from lower River Benue. The length-weight relationship shown in Table 2 reveals isometric growth in male L.
Mean condition factor for all the fishes were greater than one, with the highest value recorded in male L. Sex ratio observed in this study were same as expected ratio 1: Length-weight relationship and condition factor of Labeo coubie and Labeo senegalensis from lower River Benue. Analysis of stomach content in L. Summary of the food items of Labeo coubie and Labeo senegalensi.
This study recorded significant differences in length and weight measured for the different wenegalensis of the two species of Labeo. However, labfo differences observed between the sexes of the same species in this study may be explained by biological adaptations of the sexes to the prevailing environmental factor.
Knowledge of length-weight relationship has numerous practical senegalensi in fisheries biology Benedito-Cecilio et al.
The lengthweight relationship of fish reported in this study reveals isometric growth for majority of the sampled fish groups, meaning that the weight and length of the fish increases at approximately the same rate, hence the negative allometric growth recorded for female L.
Shahririar Nazrul et al. It is based on the hypothesis that the heavier the fish of a particular length, the better senegalebsis physiological condition Bagenal, Condition factor is also a useful index for monitoring of feeding intensity, age and growth rates in fish Oniye et al.
However, with the omnivorous food items discovered in the fishes it may also be linked to the good feeding habit employed by the fishes, hence enabling them to utilize available food item within the environment. This is similar to the findings of Olele on feeding habit of Hyperopisus bebe occidentalis Gunther, caught in Warri River. Furthermore, Haroon, and Nwani opined that the greater number of guts with food in their study was as a result of both the feeding strategy adopted by the fishes and the abundance senegalendis food during the sampling.
The results of this study reveals omnivorous feeding habit of African carp fish, this findings is similar to the report of OlatundeAdeyemi et al.
The high dominance of sendgalensis and algae in the diet of most sample fish may be an indication of their abundance in the environment and not necessarily the preference of the fish for such food since omnivores have a wild spectrum of food to select from.
Hence, the spectrum and abundance of food item in the environment under study may determine food preferences of fish in the environment regardless of their feeding habit. In earlier studies by Ayotunde et al. The ability of senegalenzis species of fish investigated in this study to feed on a broad spectrum of feed as justified in this study and those of cited literature make them possible aquaculture candidate for domestication.
Hence, it is recommended that feeding trial be conducted with commercial and on farm feed stuff using wild caught fingerlings. Some other aspect of the biology of the fish e.
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