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Título: | Interaction between stocking density and settlement on population dynamics in suspended mussel culture |
Autor: | Cubillo, Alhambra CSIC; Fuentes-Santos, I. CSIC ORCID; Labarta, Uxío CSIC ORCID | Palabras clave: | Intracohort competition Mortality Mussel growth Population dynamics Seed settlement |
Fecha de publicación: | 2015 | Editor: | Elsevier | Citación: | Journal of Sea Research 95: 84-94 (2015) | Resumen: | Population dynamics on mussels growing on suspended culture depend mainly on the balance of several processes: mortality and/or dislodgements from the ropes, recruitment and growth. The negative effect of overcrowding on mussel growth and survival has been widely studied. Other works have addressed the effect of population size on recruitment on bottom beds. This study aims to provide insight into the processes underlying population dynamics. To this purpose, we analyzed the effect of stocking density on mussel growth, survival and seed settlement, and the post-settlement interaction between adults and recruits in suspended culture. The temporal pattern of the variables involved in population dynamics was fitted by GAM models, which in contrast with parametric models does not assume any prior relationships between variables. Our results show that mussel growth and survival depend on a trade-off between competition for resources at high densities and the risk of great settlements in less crowded adult mussel populations. Intracohort competition increased with stocking density, while seed settlement, which increases the risk of mussel dislodgements and leads to intercohort competition, was higher at moderate stocking densities. Post-settlement competitive pressures were driven by total population density and size composition. Both intracohort competition in adults and asymmetric competition between adults and recruits increase with higher adult–recruit ratios. All these density-dependent processes should be considered in future management strategies and research experimental designs | Descripción: | 11 páginas, 6 figuras, 1 apéndice | Versión del editor: | http://dx.doi.org/10.1016/j.seares.2014.09.009 | URI: | http://hdl.handle.net/10261/110233 | DOI: | 10.1016/j.seares.2014.09.009 | ISSN: | 1385-1101 |
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Interaction_between_stocking.pdf | 1,86 MB | Adobe PDF | Visualizar/Abrir |
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