Yields of European perch from Upper Lake Constance from 1910 to present
Identifieur interne : 000833 ( Main/Exploration ); précédent : 000832; suivant : 000834Yields of European perch from Upper Lake Constance from 1910 to present
Auteurs : Reiner Eckmann [Allemagne, Suisse] ; S. Gerster [Allemagne, Suisse] ; A. Kraemer [Allemagne, Suisse]Source :
- Fisheries Management and Ecology [ 0969-997X ] ; 2006-12.
English descriptors
Abstract
Abstract Commercial yields of perch, Perca fluviatilis (L.), from Upper Lake Constance changed markedly during the 20th century. The perch boom in the 1950s and 1960s is attributed to higher fishing intensity and lake eutrophication. Decreasing yields in recent decades are mainly because of slower growth of perch, while a gradual decrease in year‐class strength, and an overall reduction of fishing intensity, might also have contributed to yield reduction. Slower growth is mainly attributed to lake re‐oligotrophication and infestation of perch with the pike tapeworm Triaenophorus nodulosus (Pallas). Competition for food with non‐native ruffe, Gymnocephalus cernua (L.) is likely of minor importance, while the invasion of the lake by alien macrozoobenthos species has the potential to reduce the food supply for benthivorous perch. Perch yields are assumed to remain at the low level attained at the beginning of the 21st century; however, under changing climate conditions, fluctuations around the long‐term mean will probably be wider than in the past.
Url:
DOI: 10.1111/j.1365-2400.2006.00516.x
Affiliations:
- Allemagne, Suisse
- Bade-Wurtemberg, District de Fribourg-en-Brisgau
- Constance (Allemagne)
- Université de Constance
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Le document en format XML
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The perch boom in the 1950s and 1960s is attributed to higher fishing intensity and lake eutrophication. Decreasing yields in recent decades are mainly because of slower growth of perch, while a gradual decrease in year‐class strength, and an overall reduction of fishing intensity, might also have contributed to yield reduction. Slower growth is mainly attributed to lake re‐oligotrophication and infestation of perch with the pike tapeworm Triaenophorus nodulosus (Pallas). Competition for food with non‐native ruffe, Gymnocephalus cernua (L.) is likely of minor importance, while the invasion of the lake by alien macrozoobenthos species has the potential to reduce the food supply for benthivorous perch. Perch yields are assumed to remain at the low level attained at the beginning of the 21st century; however, under changing climate conditions, fluctuations around the long‐term mean will probably be wider than in the past.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Suisse</li></country><region><li>Bade-Wurtemberg</li><li>District de Fribourg-en-Brisgau</li></region><settlement><li>Constance (Allemagne)</li></settlement><orgName><li>Université de Constance</li></orgName></list><tree><country name="Allemagne"><region name="Bade-Wurtemberg"><name sortKey="Eckmann, R" sort="Eckmann, R" uniqKey="Eckmann R" first="R." last="Eckmann">Reiner Eckmann</name></region><name sortKey="Gerster, S" sort="Gerster, S" uniqKey="Gerster S" first="S." last="Gerster">S. Gerster</name><name sortKey="Kraemer, A" sort="Kraemer, A" uniqKey="Kraemer A" first="A." last="Kraemer">A. 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