Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo)
Worldwide biodiversity is on the brink of extinction following the complete disappearance of many forest and freshwater vertebrates. This disappearance is closely linked to the reduction and disturbance of habitats, which should instead benefit from special conservation. In the case of lake ecosyste...
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| Veröffentlicht in: | African journal of ecology 2024-01, Vol.62 (1), p.n/a |
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| creator | Mazambi, Jacques Lutete Micha, Jean‐Claude Kaningini, Boniface Mwenyemali Bahati, Emilie Kaningini Alimasi, Wilondja Riziki, Jacques Walumona Ntakimazi, Gaspard Masilya, Pascal Mulungula |
| description | Worldwide biodiversity is on the brink of extinction following the complete disappearance of many forest and freshwater vertebrates. This disappearance is closely linked to the reduction and disturbance of habitats, which should instead benefit from special conservation. In the case of lake ecosystems, fish spawning grounds remain the most vulnerable. This study aims to identify, characterise and locate fish spawning and nursery sites in Lake Kivu for better conservation. Sixteen sampling sites were selected along the shoreline of the Bukavu sub‐basin. Physico‐chemical parameters were measured in situ, and fish were captured using multi‐mesh nets, identified and dissected, gonads observed and sexual maturity stages determined. Twenty‐five fish species were identified, but 17 of these use the selected sampling sites as spawning and/or nursery. Eleven spawning and nine nursery sites were identified and located. Physico‐chemical analyses showed that temperature (F = 2.124, p = 0.011), dissolved oxygen (F = 2.792, p |
| doi_str_mv | 10.1111/aje.13209 |
| format | Article |
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Résumé
La biodiversité mondiale est au bord de l'extinction suite à la disparition complète de nombreux vertébrés forestiers et d'eau douce. Cette disparition est étroitement liée à la réduction et à la perturbation des habitats qui devraient au contraire bénéficier d'une conservation particulière. Dans le cas des écosystèmes lacustres, les frayères à poissons restent les plus vulnérables. Cette étude vise à identifier, caractériser et localiser les sites de frayères et de nurseries de poissons dans le lac Kivu pour une meilleure conservation. Seize sites d'échantillonnage ont été sélectionnés le long du littoral du sous‐bas sin de Bukavu. Les paramètres physico‐chimiques ont été mesurés in situ et les poissons ont été capturés à l'aide de filets à mailles multiples, identifiés et disséqués, les gonades observées et les stades de maturité sexuelle déterminés. Vingt‐cinq espèces de poissons ont été identifiées, mais 17 d'entre elles utilisent les sites d'échantillonnage sélectionnés comme frayères et/ou nurseries. Onze sites de frai et neuf sites d'alevinage ont été identifiés et localisés. Les analyses physico‐chimiques ont montré que la température (F = 2.124, p = 0.011), l'oxygène dissous (F = 2.792, p < 0.001), la profondeur (F = 5.915, p < 0.001), et la transparence (F = 3.421, p = 0.004) étaient significativement différents, caractérisent chaque site et peuvent être des facteurs clés dans la distribution des espèces entre les sites de frai. Les relations taille‐poids des poissons indiquent des croissances allométriques. Les résultats de cette recherche contribuent à la connaissance empirique des frayères du lac Kivu.</description><identifier>ISSN: 0141-6707</identifier><identifier>EISSN: 1365-2028</identifier><identifier>DOI: 10.1111/aje.13209</identifier><language>eng</language><publisher>Nairobi: Blackwell Publishing Ltd</publisher><subject>Aquatic ecosystems ; Biodiversity ; Conservation ; Dissolved oxygen ; Empirical analysis ; Endangered & extinct species ; Fish ; Geographical distribution ; Gonads ; Lake Kivu ; Lakes ; Littoral environments ; Littoral zone ; Nurseries ; nursery ; Sampling ; Sexual maturity ; Spawning ; Spawning grounds ; Species extinction ; Vertebrates</subject><ispartof>African journal of ecology, 2024-01, Vol.62 (1), p.n/a</ispartof><rights>2023 John Wiley & Sons Ltd.</rights><rights>Copyright © 2024 John Wiley & Sons Ltd</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c2929-95f2ca8bebcf43db7f1832f200d7d92c476991a7fe5401833144a2a3ce532a573</cites><orcidid>0000-0002-6205-2004 ; 0000-0002-4551-887X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Faje.13209$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Faje.13209$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Mazambi, Jacques Lutete</creatorcontrib><creatorcontrib>Micha, Jean‐Claude</creatorcontrib><creatorcontrib>Kaningini, Boniface Mwenyemali</creatorcontrib><creatorcontrib>Bahati, Emilie Kaningini</creatorcontrib><creatorcontrib>Alimasi, Wilondja</creatorcontrib><creatorcontrib>Riziki, Jacques Walumona</creatorcontrib><creatorcontrib>Ntakimazi, Gaspard</creatorcontrib><creatorcontrib>Masilya, Pascal Mulungula</creatorcontrib><title>Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo)</title><title>African journal of ecology</title><description>Worldwide biodiversity is on the brink of extinction following the complete disappearance of many forest and freshwater vertebrates. This disappearance is closely linked to the reduction and disturbance of habitats, which should instead benefit from special conservation. In the case of lake ecosystems, fish spawning grounds remain the most vulnerable. This study aims to identify, characterise and locate fish spawning and nursery sites in Lake Kivu for better conservation. Sixteen sampling sites were selected along the shoreline of the Bukavu sub‐basin. Physico‐chemical parameters were measured in situ, and fish were captured using multi‐mesh nets, identified and dissected, gonads observed and sexual maturity stages determined. Twenty‐five fish species were identified, but 17 of these use the selected sampling sites as spawning and/or nursery. Eleven spawning and nine nursery sites were identified and located. Physico‐chemical analyses showed that temperature (F = 2.124, p = 0.011), dissolved oxygen (F = 2.792, p < 0.001), depth (F = 5.915, p < 0.001) and transparency (F = 3.421, p = 0.004) were significantly different, which characterise each site and may be key factors in species distribution between spawning sites. Fish size–weight relationships indicate allometric growths. The results of this research contribute to empirical knowledge of fish spawning grounds.
Résumé
La biodiversité mondiale est au bord de l'extinction suite à la disparition complète de nombreux vertébrés forestiers et d'eau douce. Cette disparition est étroitement liée à la réduction et à la perturbation des habitats qui devraient au contraire bénéficier d'une conservation particulière. Dans le cas des écosystèmes lacustres, les frayères à poissons restent les plus vulnérables. Cette étude vise à identifier, caractériser et localiser les sites de frayères et de nurseries de poissons dans le lac Kivu pour une meilleure conservation. Seize sites d'échantillonnage ont été sélectionnés le long du littoral du sous‐bas sin de Bukavu. Les paramètres physico‐chimiques ont été mesurés in situ et les poissons ont été capturés à l'aide de filets à mailles multiples, identifiés et disséqués, les gonades observées et les stades de maturité sexuelle déterminés. Vingt‐cinq espèces de poissons ont été identifiées, mais 17 d'entre elles utilisent les sites d'échantillonnage sélectionnés comme frayères et/ou nurseries. Onze sites de frai et neuf sites d'alevinage ont été identifiés et localisés. Les analyses physico‐chimiques ont montré que la température (F = 2.124, p = 0.011), l'oxygène dissous (F = 2.792, p < 0.001), la profondeur (F = 5.915, p < 0.001), et la transparence (F = 3.421, p = 0.004) étaient significativement différents, caractérisent chaque site et peuvent être des facteurs clés dans la distribution des espèces entre les sites de frai. Les relations taille‐poids des poissons indiquent des croissances allométriques. Les résultats de cette recherche contribuent à la connaissance empirique des frayères du lac Kivu.</description><subject>Aquatic ecosystems</subject><subject>Biodiversity</subject><subject>Conservation</subject><subject>Dissolved oxygen</subject><subject>Empirical analysis</subject><subject>Endangered & extinct species</subject><subject>Fish</subject><subject>Geographical distribution</subject><subject>Gonads</subject><subject>Lake Kivu</subject><subject>Lakes</subject><subject>Littoral environments</subject><subject>Littoral zone</subject><subject>Nurseries</subject><subject>nursery</subject><subject>Sampling</subject><subject>Sexual maturity</subject><subject>Spawning</subject><subject>Spawning grounds</subject><subject>Species extinction</subject><subject>Vertebrates</subject><issn>0141-6707</issn><issn>1365-2028</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNp1kE9LAzEQxYMoWKsHv0HAiwW3zb_d7B5LrVotCKLnJc0mbeqa1GTXUs9-cNOuV-cyw8xv3oMHwCVGQxxrJNZqiClBxRHoYZqlCUEkPwY9hBlOMo74KTgLYY0QylnGeuBnVinbGG2kaIyzN7B23QSFraBcCS9ko7wJ3dJpGDZia41dwqV3ra3CAbStD5FSARoLm5WCtWka50UNv51V-7e5eFfwyXy18FqJECUtvH2BE2eXbnAOTrSog7r4633wdjd9nTwk8-f72WQ8TyQpSJEUqSZS5Au1kJrRasE1zinRBKGKVwWRjGdFgQXXKmUonihmTBBBpUopESmnfXDV6W68-2xVaMq1a72NlmU0IIiTPGWRGnSU9C4Er3S58eZD-F2JUbkPuYwhl4eQIzvq2K2p1e5_sBw_TruPX-Ovfpo</recordid><startdate>202401</startdate><enddate>202401</enddate><creator>Mazambi, Jacques Lutete</creator><creator>Micha, Jean‐Claude</creator><creator>Kaningini, Boniface Mwenyemali</creator><creator>Bahati, Emilie Kaningini</creator><creator>Alimasi, Wilondja</creator><creator>Riziki, Jacques Walumona</creator><creator>Ntakimazi, Gaspard</creator><creator>Masilya, Pascal Mulungula</creator><general>Blackwell Publishing Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>7SS</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-6205-2004</orcidid><orcidid>https://orcid.org/0000-0002-4551-887X</orcidid></search><sort><creationdate>202401</creationdate><title>Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo)</title><author>Mazambi, Jacques Lutete ; Micha, Jean‐Claude ; Kaningini, Boniface Mwenyemali ; Bahati, Emilie Kaningini ; Alimasi, Wilondja ; Riziki, Jacques Walumona ; Ntakimazi, Gaspard ; Masilya, Pascal Mulungula</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2929-95f2ca8bebcf43db7f1832f200d7d92c476991a7fe5401833144a2a3ce532a573</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Aquatic ecosystems</topic><topic>Biodiversity</topic><topic>Conservation</topic><topic>Dissolved oxygen</topic><topic>Empirical analysis</topic><topic>Endangered & extinct species</topic><topic>Fish</topic><topic>Geographical distribution</topic><topic>Gonads</topic><topic>Lake Kivu</topic><topic>Lakes</topic><topic>Littoral environments</topic><topic>Littoral zone</topic><topic>Nurseries</topic><topic>nursery</topic><topic>Sampling</topic><topic>Sexual maturity</topic><topic>Spawning</topic><topic>Spawning grounds</topic><topic>Species extinction</topic><topic>Vertebrates</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mazambi, Jacques Lutete</creatorcontrib><creatorcontrib>Micha, Jean‐Claude</creatorcontrib><creatorcontrib>Kaningini, Boniface Mwenyemali</creatorcontrib><creatorcontrib>Bahati, Emilie Kaningini</creatorcontrib><creatorcontrib>Alimasi, Wilondja</creatorcontrib><creatorcontrib>Riziki, Jacques Walumona</creatorcontrib><creatorcontrib>Ntakimazi, Gaspard</creatorcontrib><creatorcontrib>Masilya, Pascal Mulungula</creatorcontrib><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><jtitle>African journal of ecology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mazambi, Jacques Lutete</au><au>Micha, Jean‐Claude</au><au>Kaningini, Boniface Mwenyemali</au><au>Bahati, Emilie Kaningini</au><au>Alimasi, Wilondja</au><au>Riziki, Jacques Walumona</au><au>Ntakimazi, Gaspard</au><au>Masilya, Pascal Mulungula</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo)</atitle><jtitle>African journal of ecology</jtitle><date>2024-01</date><risdate>2024</risdate><volume>62</volume><issue>1</issue><epage>n/a</epage><issn>0141-6707</issn><eissn>1365-2028</eissn><abstract>Worldwide biodiversity is on the brink of extinction following the complete disappearance of many forest and freshwater vertebrates. This disappearance is closely linked to the reduction and disturbance of habitats, which should instead benefit from special conservation. In the case of lake ecosystems, fish spawning grounds remain the most vulnerable. This study aims to identify, characterise and locate fish spawning and nursery sites in Lake Kivu for better conservation. Sixteen sampling sites were selected along the shoreline of the Bukavu sub‐basin. Physico‐chemical parameters were measured in situ, and fish were captured using multi‐mesh nets, identified and dissected, gonads observed and sexual maturity stages determined. Twenty‐five fish species were identified, but 17 of these use the selected sampling sites as spawning and/or nursery. Eleven spawning and nine nursery sites were identified and located. Physico‐chemical analyses showed that temperature (F = 2.124, p = 0.011), dissolved oxygen (F = 2.792, p < 0.001), depth (F = 5.915, p < 0.001) and transparency (F = 3.421, p = 0.004) were significantly different, which characterise each site and may be key factors in species distribution between spawning sites. Fish size–weight relationships indicate allometric growths. The results of this research contribute to empirical knowledge of fish spawning grounds.
Résumé
La biodiversité mondiale est au bord de l'extinction suite à la disparition complète de nombreux vertébrés forestiers et d'eau douce. Cette disparition est étroitement liée à la réduction et à la perturbation des habitats qui devraient au contraire bénéficier d'une conservation particulière. Dans le cas des écosystèmes lacustres, les frayères à poissons restent les plus vulnérables. Cette étude vise à identifier, caractériser et localiser les sites de frayères et de nurseries de poissons dans le lac Kivu pour une meilleure conservation. Seize sites d'échantillonnage ont été sélectionnés le long du littoral du sous‐bas sin de Bukavu. Les paramètres physico‐chimiques ont été mesurés in situ et les poissons ont été capturés à l'aide de filets à mailles multiples, identifiés et disséqués, les gonades observées et les stades de maturité sexuelle déterminés. Vingt‐cinq espèces de poissons ont été identifiées, mais 17 d'entre elles utilisent les sites d'échantillonnage sélectionnés comme frayères et/ou nurseries. Onze sites de frai et neuf sites d'alevinage ont été identifiés et localisés. Les analyses physico‐chimiques ont montré que la température (F = 2.124, p = 0.011), l'oxygène dissous (F = 2.792, p < 0.001), la profondeur (F = 5.915, p < 0.001), et la transparence (F = 3.421, p = 0.004) étaient significativement différents, caractérisent chaque site et peuvent être des facteurs clés dans la distribution des espèces entre les sites de frai. Les relations taille‐poids des poissons indiquent des croissances allométriques. Les résultats de cette recherche contribuent à la connaissance empirique des frayères du lac Kivu.</abstract><cop>Nairobi</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/aje.13209</doi><tpages>18</tpages><orcidid>https://orcid.org/0000-0002-6205-2004</orcidid><orcidid>https://orcid.org/0000-0002-4551-887X</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | African journal of ecology, 2024-01, Vol.62 (1), p.n/a |
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| source | Wiley Online Library All Journals |
| subjects | Aquatic ecosystems Biodiversity Conservation Dissolved oxygen Empirical analysis Endangered & extinct species Fish Geographical distribution Gonads Lake Kivu Lakes Littoral environments Littoral zone Nurseries nursery Sampling Sexual maturity Spawning Spawning grounds Species extinction Vertebrates |
| title | Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo) |
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