Commercial fishing influences the life histories of fish in the world's largest desert lake.
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| Názov: | Commercial fishing influences the life histories of fish in the world's largest desert lake. |
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| Autori: | Muehl MF; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, USA., Olin JA; Department of Biological Sciences, Great Lakes Research Center, Michigan Technological University, Houghton, Michigan, USA., Keyombe JL; Kenya Marine and Fisheries Research Institute, Kisumu, Kenya., Aller JY; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, USA., Aller RC; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, USA., Lwiza KMM; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, USA., Frisk MG; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, USA. |
| Zdroj: | Journal of fish biology [J Fish Biol] 2025 Oct; Vol. 107 (4), pp. 1266-1280. Date of Electronic Publication: 2025 Jun 26. |
| Spôsob vydávania: | Journal Article |
| Jazyk: | English |
| Informácie o časopise: | Publisher: Blackwell Publishing Country of Publication: England NLM ID: 0214055 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8649 (Electronic) Linking ISSN: 00221112 NLM ISO Abbreviation: J Fish Biol Subsets: MEDLINE |
| Imprint Name(s): | Publication: 2003- : Oxford, UK : Blackwell Publishing Original Publication: London, New York, Published for the Fisheries Society of the British Isles by Academic Press. |
| Výrazy zo slovníka MeSH: | Fisheries* , Life History Traits* , Fishes*/physiology , Fishes*/growth & development, Animals ; Lakes |
| Abstrakt: | Lake Turkana, the world's largest permanent desert lake, is an important source of fish for both local consumption and international trade. The growth of Lake Turkana's commercial fishery has increased the risk of overexploiting the lake's fish stocks. Selection pressure from overexploitation of fish stocks often drives shifts in fish life-history traits, including mean length (L (© 2025 Fisheries Society of the British Isles.) |
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| Grant Information: | SEED 2021S Frisk School of Marine and Atmospheric Sciences, Stony Brook University; Stony Brook University |
| Contributed Indexing: | Keywords: African Great Lakes; applied ecology; fisheries; food sustainability; life history; maturity |
| Entry Date(s): | Date Created: 20250626 Date Completed: 20251020 Latest Revision: 20251020 |
| Update Code: | 20251020 |
| DOI: | 10.1111/jfb.70103 |
| PMID: | 40567130 |
| Databáza: | MEDLINE |
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Nájsť tento článok vo Web of Science | Abstrakt: | Lake Turkana, the world's largest permanent desert lake, is an important source of fish for both local consumption and international trade. The growth of Lake Turkana's commercial fishery has increased the risk of overexploiting the lake's fish stocks. Selection pressure from overexploitation of fish stocks often drives shifts in fish life-history traits, including mean length (L <subscript>mean</subscript> ), maximum length (L <subscript>max</subscript> ) and size at maturity (L <subscript>mat</subscript> ). To assess the life-history indicators of overexploitation in Lake Turkana, we compared the life-history traits of six of Lake Turkana's major commercial fish species from three time periods (1930-1953, 1972-1975, 2010-2022) that represent distinct levels of fishing pressure. These focal species were the African butter catfish Schilbe uranoscopus Rüppell 1832, the elongate tigerfish Hydrocynus forskahlii (Cuvier 1819), Nile perch Lates niloticus (L. 1758), Nile tilapia Oreochromis niloticus (L. 1758), silversides Alestes baremose (Joannis 1835) and wahrindi Synodontis schall (Bloch and Schneider 1801). Heavily exploited species exhibited notable decreases in L <subscript>mat</subscript> as fishing pressure increased, and include A. baremose (29.7% decrease), H. forskahlii (16.4% decrease), L. niloticus (56.1% decrease) and O. niloticus (45.3% decrease). In contrast, lightly exploited species, including S. uranoscopus and S. schall, did not exhibit large declines in life-history traits. Additionally, we used current catch length frequency data for L. niloticus to infer that L. niloticus are currently experiencing overfishing and exhibit signs of the depletion of large 'mega-spawners'. These results suggest that heavy commercial fishing likely drives the observed life-history responses. We suggest that the management of sustainable fisheries in Lake Turkana should focus on gear size restrictions as well as on reducing fishing effort on commercial-sized fish to decrease the probability of overfishing and potential declines of stocks.<br /> (© 2025 Fisheries Society of the British Isles.) |
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| ISSN: | 1095-8649 |
| DOI: | 10.1111/jfb.70103 |