Population dynamics of subtidal blue mussels Mytilus edulis and the impact of cultivation
| Autor: | Aad C. Smaal, M.R. van Stralen, Peter M. J. Herman, Jacob J. Capelle, Jeroen W.M. Wijsman |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Regional center Yerseke
0106 biological sciences Salinity animal structures Population Management Monitoring Policy and Law Aquatic Science Aquaculture impact 010603 evolutionary biology 01 natural sciences lcsh:Aquaculture. Fisheries. Angling Predation Wadden Sea Onderzoeksformatie Aquaculture and Fisheries Aquaculture Ecosystem goods and services lcsh:QH540-549.5 Sampling Bottom culture education Shellfish Water Science and Technology lcsh:SH1-691 Asterias rubens education.field_of_study Regiocentrum Yerseke biology Aquacultuur en Visserij Ecology business.industry 010604 marine biology & hydrobiology Asterias fungi Aquatic animal Mussel Sea star biology.organism_classification Mytilus Fishery lcsh:Ecology business |
| Zdroj: | Aquaculture Environment Interactions 9 (2017) Aquaculture Environment Interactions, 9, 155-168 Aquaculture Environment Interactions, Vol 9, Pp 155-168 (2017) |
| ISSN: | 1869-7534 1869-215X |
| DOI: | 10.3354/aei00221 |
| Popis: | Fishery on subtidal mussel beds and subsequent relying on culture plots in the same system is a common practice in bottom mussel culture. We address factors that determine the population dynamics of subtidal blue mussels Mytilus edulis L. and to what extent total (natural plus cultured) subtidal mussel biomass in the system is affected by fishery practices. Mussel size and density of spatially segregated natural and cultured subtidal mussel populations in the western Wadden Sea were measured over time in 2 field studies. Spatial patterns in survival rates showed better spat survival in areas with lower salinity and lower density of sea stars Asterias rubens. This suggests that mussel survival is negatively related to sea star distribution which is to a large extent controlled by salinity. The Asterias−Mytilus relation in the Wadden Sea is an example of the concept that environmental stress determines the successes of the prey by affecting the prey− predator relationship. Natural beds that escape predation are found at lower salinities, and mussels on these beds showed low growth rates, also because of lower food quality in these areas. Mussel culture is strongly affecting the population dynamics of the subtidal mussel population, through relay of mussels from natural mussel beds to culture plots. This activity increases mussel growth and survival, because food quality on culture plots is high and predation is controlled. Despite harvesting, mussel biomass production on culture plots was higher than on natural mussel beds, enhancing total subtidal mussel stock. |
| Databáze: | OpenAIRE |
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