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• W2017257532 abstract "To guide the zoning process in Lake Tumba, Democratic Republic of Congo, breeding sites of Tilapia congica were studied. Physical metrics measured were: nest depths, exposure to sun rays, distance from the edges, site spreads, and habitat types. Mean nest depth = 0.23 m ± 0.08 (SD), range = 0.04–2.2 m (n = 553 nests); 100% (n = 70 sites) sites were exposed to the sun and the polynomial regression analysis showed 90% sites were within the range 51–250 m from the lake shores (y = −1.7143x2 + 10.371x− 1.8; R2 = 0.597, n = 70 sites), with 60% clumped within the range of 51–150 m, indicating a relationship between nesting sites and the distance from edges. The largest group spread group was 300 m, and among the four breeding sites identified, one was ∼10 km long, meaning a zonal spatial spread ∏ = 300 ha and a core reproduction zone ∏′ = 100 ha. T. congica built 87.30% of their nest in habitats where Hippo grass Vossia cuspidata (48.20%) and Water lily Nympheae stellata (39.10%) dominated. T. congica shared 41.81% of its nesting sites with other fish species, leading to the conclusion that protecting the species habitats would provide the umbrella for the conservation of other species. Pour orienter le processus de zonage au lac Tumba, en République Démocratique du Congo, nous avons étudié les sites de reproduction de Tilapia congica. Les paramètres physiques mesurés étaient : la profondeur des nids, l’exposition aux rayons du soleil, la distance par rapport à la berge, l’étendue des sites et les types d’habitat. La profondeur moyenne des nids = 0,23 m ± 0,08 (DS), le domaine vital du nid = 0,04–2,2 m (n = 553 nids); 100% des sites (n = 70) étaient exposés au soleil, et l’analyse de la régression polynomiale a montré que 90% des sites se trouvaient entre 51 et 250 m des berges du lac (y = −1,7143x2 + 10,371x – 1,8; R2 = 0,597; n = 70 sites) et 60% d’entre eux étaient rassemblés à une distance comprise entre 51 et 150 m des berges, ce qui indique une relation entre les sites de nidification et la distance par rapport aux berges. Le groupe le plus étendu avait 300 m et, parmi les quatre sites de reproduction identifiés, un avait ∼ 10 km de long, ce qui signifie une dispersion spatiale zonale Π = 300 ha et une zone de reproduction centrale Π’ = 100 ha. Les T.congica construisent 87,30% de leurs nids dans des habitats où dominent l’herbe à hippos Vossia cuspidata (48,20%) et les nénuphars Nymphea stellata (39,10%). Les T. congica partagent 41,81% de leurs sites de nidification avec d’autres espèces de poissons, d’où la conclusion que la protection des habitats de cette espèce fournirait aussi une protection à d’autres espèces." @default.
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• W2017257532 date "2009-09-01" @default.
• W2017257532 modified "2023-09-25" @default.
• W2017257532 title "The use of breeding sites ofTilapia congica(Thys & van Audenaerde 1960) to delineate conservation sites in the Lake Tumba, Democratic Republic of Congo: toward the conservation of the lake ecosystem" @default.
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• W2017257532 doi "https://doi.org/10.1111/j.1365-2028.2009.01180.x" @default.
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