Modeling the distribution of thorny skate (Amblyraja radiata) in the southern Grand Banks (Newfoundland, Canada)
| Autor: | Raul Vilela, Elena Guijarro-García, José Luis del Río, José María Bellido, Maria Grazia Pennino |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
biology business.industry 010604 marine biology & hydrobiology Radiata Distribution (economics) Aquatic Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Thorny skate Fishery Bycatch Geography Abundance (ecology) business Amblyraja Ecology Evolution Behavior and Systematics |
| Zdroj: | Canadian Journal of Fisheries and Aquatic Sciences. 76:2121-2130 |
| ISSN: | 1205-7533 0706-652X |
| DOI: | 10.1139/cjfas-2018-0302 |
| Popis: | Globally, commercial fisheries have had a strong impact on elasmobranch populations directly through high catch rates and indirectly through bycatch. Consequently, the abundance of many species is declining to the extent that some are considered under threat of extinction. Regionally, this negative trend is also evident in the international waters of the southern Grand Banks (off the coast of Newfoundland, Canada), where the occurrence of the thorny skate (Amblyraja radiata) has declined by nearly 70% in recent decades. This study used Bayesian species distribution models to investigate the habitat preference and biomass trends of the thorny skate during a 14-year period (2003–2017), linking five environmental predictors (i.e., bathymetry, sea bottom temperature, seabed aspect, slope, and rugosity) and prey distribution with fishery-independent data. Our findings identify some of the sensitive habitats for this species and the ecological factors that may be driving its population dynamics in the area. We argue that knowledge about the factors influencing the distribution of this species and spatiotemporal effects could be exploited as potential mitigation measures for future fishery management strategies. |
| Databáze: | OpenAIRE |
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