Caractérisation De La Pêche Au Lac Kivu

Abstract

This study was focused on the description of fishing gears on Lake Kivu. Data were collected from March 2012 to February 2014 in Goma, Bukavu, and Kibuye fishing stations. The study findings indicate that gill nets, beach seine, lift net, trammel net composed of two panels of small and larger meshes (mosquito net attached to lift net parts), mosquito net, longline, single line, pots, and cast net were identified as fishing gears used on Lake Kivu. Longline was more selective (2 species) in terms of species selection. The lift net presented the best catch (19.4 ± 11 kg), while the trammel net showed the highest CPUE (7.9 ± 6.1 kg/h). The large dimensions of gears and the long netting duration characterized gillnets (1023.2 ± 620.1 m2 ) and longline (10.3 ± 4.6 hours) respectively. Cast-nets (20mm) showed the largest mesh size, while mosquito nets (1 ± 0.3 mm) were the smallest.

Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo)

“…Individuals with gonads at sexually mature stages I and II were considered immature, while those with gonads at sexually mature stages III and IV and those at post‐spawning stage V were taken to be mature individuals in the reproductive phase (Balagizi et al, 2016; Heyman & Kjerfve, 2008; Shi et al, 2022; Thompson & Riley, 1981).…”

“…Moreover, 27 of the 29 fish species in Lake Kivu are entirely littoral (Snoeks et al, 2012). The two other pelagic species use this area, a receptacle for watershed inputs (Muvundja et al, 2009), as a place for spawning and/or larval growth (Balagizi et al, 2016). The dumping of topsoil, either naturally or by the population, threatens the spawning substrates in the littoral zone and thus hinders fish reproduction.…”

Climate Risks Assessment, Opportunities Related to the Evolution of Ecosystems and Limitation of the Provision of Ecosystem Services: Landscape Case of South-Kivu (Albertine Riflt, Drc)

“…They contain about twice the amount of protein found in cereals, such as wheat, maize, rice,... [47]. Legumes are more advantageous because they not only adapt to climate change but also contribute to mitigating its effects due to their capacity to fix nitrogen in the soil [48].…”

“…According to FAO [48], hundreds of legume varieties, including many legume species grown around the world, are essential components of soil management and pest control at the farm level, especially at the smallholder level. An important property of legumes is their ability to biologically fix nitrogen.…”

“…Rhizobium, Brady rhizobium), are able to convert atmospheric nitrogen into nitrogen compounds that can be used by plants, also improving soil fertility. Some legume species are also able to release phosphorus from the soil, which also plays an important role in plant nutrition [47], [48]. Legumes are staple foods in South Kivu province such as beans (Phaseolus vilgaris), soybeans (Glicine max), peanuts (Arachis hypogaea) and peas (Pisum sativum), Graph III.…”