METHODS: The region has the lowest pluviometric rates of Brazil. Both during the present investigation and by re-examination of published data it is shown that, when a large number of fish are examined, and when the results are expressed comparably, i.e. 2(b)].
Their gut content analysis reveals that Limnothrissa miodon feeds on zooplankton whereas Clarias feeds on fishes and molluscs. Congo. Cast, seine and gill nets were used to collect the individuals.
2) Collecting and analyzing new data on yields and catches of fish. 3.
Les indices alimentaires calculés révèlent l'existence d'un partage des ressources alimentaires disponibles entre les différentes espèces de poissons qui serait interprété comme une tendance à la réduction de la compétition interspécifique pour les ressources alimentaires. Overall, increased consolidation of methods and analyses is recommended to facilitate comparative studies.Contribution to the Study of the Nutrional Requirements in the Larvas and Juveniles of the River Perch (Perca fluviatilis L.).
Les insectes et les algues constituent les seules catégories de proies ingérées par toutes les espèces. 0000003694 00000 n The food of Gasterosteus aculeatus is studied, and it is shown that the diet, consisting chiefly of Crustacea and insects, changes slightly with season and with increase in size of fish. zone côtière du lac de barrage de Mumosho. The Reseau distributes "gray literature", non-published or limited distribution government or NGO documents regarding the Great Lakes area of central Africa including Rwanda, Burundi, and the Democratic Republic of Congo. Sampling gear type, experimental design, and statistical tests can affect results on diel feeding chronology, and stomach content weights do not suffice to interpret diel feeding chronology. Les habitudes alimentaires des poissons d’eau douce africaines. 0000002230 00000 n Dussart, B., 1982. RESUME.-D'avril à juin 2009, 207 spécimens des poissons appartenant à 6 genres ont été capturés au petit lac de Barrage de Mumosho sur la Rivière Ruzizi. 0000004919 00000 n The biomass and production of bacteria remained almost unchanged and depended on the development of zoo- and phytoplankton. 0000005776 00000 n Les partenaires du couple étaient bagués et donc recon-naissables. During the winter the fish eat less than at other times, and both sexes feed more sporadically than usual during the breeding season.
– Diet, food competition, dam, Ruzizi River.
ORSTOM, Paris, 1906) dans le lac Kivu, R.D.
Bruton, G.W.
Ruzizi en amont et en aval du barrage de Mururu. However, there is no information on the feeding biology of depik and kawan, hence here we ABSTRACT: The feeding habits of the straightfin barb Barbus paludinosus was studied in Lake Ziway, Ethiopia, from 504 gut samples collected from April to May (dry months) and July to August (wet months) of the year 2011. The relationship between feeding and reproductive activities were not significant, given that individuals showed high feeding rates regardless of the intensity of their reproductive activities.
The proportion of macrophytes increased with size of fish while the importance of detritus and zooplankton declined with fish size.
Reasons are, however, given for rejection of the method based on the number of organisms eaten, and also of the practice of comparing data so obtained with counts of the organisms found in samples of small areas of the substratum. 0000001551 00000 n
Presse universitaire de Namur, Namur, 52pp. Ce sont les algues, le zooplancles annélides, les mollusques, les poissons et les débris végétaux (Fig.
UT Libraries and their dynamics with respect to the hydrological regime, local meteorological variations and to the limnology of this zone;