Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus)
The population dynamics of the golden carpet shell clam Polititapes aureus (Gmelin, 1791) were studied over the course of six years in the ria of Arousa (Galicia, NW Spain). Density reached a value of 62.29 individuals m−2 and biomass was 76.30 g m−2. Recruitment was related to water temp...
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Academia.edu Journals
2023-10-01
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| Series: | Academia Biology |
| Online Access: | https://www.academia.edu/108618140/Effects_of_environmental_variability_on_population_dynamics_of_golden_carpet_shell_clam_Polititapes_aureus_ |
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| author | José Manuel Parada José Molares |
| author_facet | José Manuel Parada José Molares |
| author_sort | José Manuel Parada |
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The population dynamics of the golden carpet shell clam Polititapes aureus (Gmelin, 1791) were studied over the course of six years in the ria of Arousa (Galicia, NW Spain). Density reached a value of 62.29 individuals m−2 and biomass was 76.30 g m−2. Recruitment was related to water temperature, to food availability measured as fluorescence and to density-dependent phenomena starting at 39 individuals m−2. The condition factor and mortality showed a clear annual periodicity, while growth rate G30 was biannual. Growth was fitted to a seasonal von Bertalanffy function, with L∞ = 43.6 mm; K = 0.360 y−1; C = 0.65 and ts = 1.21, with a confidence interval determined by bootstrapping. The instantaneous mortality rate for individuals aged 1 and 2 years was 0.94 in spring-summer and 0.14 in autumn-winter. The fishing mortality rate had little effect on the population. A model was built to explain the natural mortality rate as function of temperature, salinity, fluorescence, and the condition factor. The results allow the application of fishery management tools based on their population dynamics and to measure their effectiveness considering the environmental variability. They also show the vulnerability of these stocks to changes resulting from climate change. |
| format | Article |
| id | doaj-art-0c60188191a342e6bfb2c81336f2e4c0 |
| institution | Kabale University |
| issn | 2837-4010 |
| language | English |
| publishDate | 2023-10-01 |
| publisher | Academia.edu Journals |
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| series | Academia Biology |
| spelling | doaj-art-0c60188191a342e6bfb2c81336f2e4c02025-02-11T00:37:13ZengAcademia.edu JournalsAcademia Biology2837-40102023-10-011410.20935/AcadBiol6127Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus)José Manuel Parada0José Molares1Centro de Investigacións Mariñas (CIMA), Consellería do Mar. Pedras de Corón s/n. Box 13. 36620, Vilanova de Arousa, Galicia, Spain.Instituto Tecnolóxico para o Control do Medio Mariño de Galicia (INTECMAR), Consellería do Mar. Peirao de Vilaxoán, s/n 36611, Vilagarcía de Arousa, Galicia, Spain. The population dynamics of the golden carpet shell clam Polititapes aureus (Gmelin, 1791) were studied over the course of six years in the ria of Arousa (Galicia, NW Spain). Density reached a value of 62.29 individuals m−2 and biomass was 76.30 g m−2. Recruitment was related to water temperature, to food availability measured as fluorescence and to density-dependent phenomena starting at 39 individuals m−2. The condition factor and mortality showed a clear annual periodicity, while growth rate G30 was biannual. Growth was fitted to a seasonal von Bertalanffy function, with L∞ = 43.6 mm; K = 0.360 y−1; C = 0.65 and ts = 1.21, with a confidence interval determined by bootstrapping. The instantaneous mortality rate for individuals aged 1 and 2 years was 0.94 in spring-summer and 0.14 in autumn-winter. The fishing mortality rate had little effect on the population. A model was built to explain the natural mortality rate as function of temperature, salinity, fluorescence, and the condition factor. The results allow the application of fishery management tools based on their population dynamics and to measure their effectiveness considering the environmental variability. They also show the vulnerability of these stocks to changes resulting from climate change.https://www.academia.edu/108618140/Effects_of_environmental_variability_on_population_dynamics_of_golden_carpet_shell_clam_Polititapes_aureus_ |
| spellingShingle | José Manuel Parada José Molares Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus) Academia Biology |
| title | Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus) |
| title_full | Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus) |
| title_fullStr | Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus) |
| title_full_unstemmed | Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus) |
| title_short | Effects of environmental variability on population dynamics of golden carpet shell clam (Polititapes aureus) |
| title_sort | effects of environmental variability on population dynamics of golden carpet shell clam polititapes aureus |
| url | https://www.academia.edu/108618140/Effects_of_environmental_variability_on_population_dynamics_of_golden_carpet_shell_clam_Polititapes_aureus_ |
| work_keys_str_mv | AT josemanuelparada effectsofenvironmentalvariabilityonpopulationdynamicsofgoldencarpetshellclampolititapesaureus AT josemolares effectsofenvironmentalvariabilityonpopulationdynamicsofgoldencarpetshellclampolititapesaureus |