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Yehouenou A. Pazou E.,Laboratoire Of Recherche En Biologie Appliquee Larba | Aleodjrodo P.E.,University Abomey Calavi | Azehoun J.P.,Institute National des Recherches Agricoles du Benin | Van Straalen N.M.,VU University Amsterdam | And 3 more authors.
Environmental Monitoring and Assessment | Year: 2014

Lake Nokoué and Cotonou Lagoon are the most important and most productive continental freshwaters in Bénin, with an estimated fish production of over 2 tonnes per hectare in Lake Nokoué. Organochlorine pesticides are used in agriculture and to repel tsetse flies, malaria mosquitoes and other diseases raised. Sediment, fish, shrimp and oyster species were collected in Lake Nokoué and Cotonou Lagoon for pesticide residues analysis. The main pesticides identified in sediment were pp′-DDT and its metabolites pp-DDE and pp′-DDD, with residue levels between the detection limit and 24.4 μg/kg dry weight. Fish species commonly consumed such as Elops lacerta, Podamasys jubelini, Gobbienellus occidentalis, Ethmalosa fimbriata, Mugil cephalus and Hemichromis fasciatus were contaminated with residues of seven to nine pesticides, including pp-DDE, op′-DDD, pp′-DDD, op′-DDT, pp′-DDT, α-endosulfan, aldrin, dieldrin and γ-hexachlorocyclohexane. The levels ranged from detection limit to 289 ng/g lipid. The same pesticides were also detected in other aquatic species, such as shrimp and oysters. A summed risk assessment, comparing pesticide intake levels through fish consumption with tolerable daily intake levels proposed by the World Health Organization, showed in all cases a low risk for human health. © 2013 Springer Science+Business Media Dordrecht.

Koutinhouin B.G.,Laboratoire Of Recherche En Biologie Appliquee Larba | Youssao A.K.I.,Laboratoire Of Recherche En Biologie Appliquee Larba | Kpodekon T.M.,Laboratoire Of Recherche En Biologie Appliquee Larba | Gantoli Y.G.,Projet de Promotion de lelevage dans lAtacora
Livestock Research for Rural Development | Year: 2010

A study on the influence of precocious milking on the growth and viability of calves was carried out on 112 calves belonging to 11 herds entrusted to Peuls herdsman in the suburban zone of Natitingou. Two lots were made: the experimental composed of calves subjected to the systematic colostral diet (without milking of the cows during the first week) and the control lot composed of calves subjected to the irregular colostral diet (with milking of the cows). From calving to eight days old, the calves of the two lots had identical weights. At weaning, the calves of the experimental lots had on average 3 kg of live weight more than the control calves of the same age (P<0.05). The number of red blood cells was significantly higher in the experimental calves (6 263 000 vs 4 980 000 per ml of blood) whereas the number of white blood cells was higher in control calves (10 250 vs 12 983 per ml of blood). From the ¶10th to the 30th day after the calving, the prevalence of gastro-intestinal infections of calves of the experimental lots was half of those of the control calves (13 vs 24%). The ad-libitum consumption of colostrum improved the growth performance of calves, reduced their perinatal morbidity and mortality rates and increased their productivity.

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