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Differences in theoccurrence andabundance of batoidsacross an oceanicarchipelago usingcomplementary datasources: Implicationsfor conservation Fernando TuyaRicardo AguilarFernando Espino2021 год

Differences in the occurrence and abundance of batoids across an oceanic archipelago using complementary data sources: Implications for conservation
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Аннотация: Abstract Batoids, distributed from shallow to abyssal depths, are considerably vulnerable to anthropogenic threats. Data deficiencies on the distribution patterns of batoids, however, challenge their effective management and conservation. In this study, we took advantage of the particular geological and geomorphological configuration of the Canary Islands, across an east‐to‐west gradient in the eastern Atlantic Ocean, to assess whether patterns in the occurrence and abundance of batoids varied between groups of islands (western, central, and eastern). Data were collected from shallow (<40 m, via underwater visual counts and by a local community science program) and deep waters (60–700 m, via ROV deployments). Eleven species of batoids, assessed by the IUCN Red List of Threatened Species, were registered, including three “Critically Endangered” ( Aetomylaeus bovinus , Dipturus batis , and Myliobatis aquila ), three “Endangered” ( Gymnura altavela , Mobula mobular , and Rostroraja alba ), two “Vulnerable” ( Dasyatis pastinaca and Raja maderenseis ), and two “Data Deficient” ( Taeniurops grabata and Torpedo marmorata ). Also, a “Least Concern” species ( Bathytoshia lata ) was observed. Overall, batoids were ~1 to 2 orders of magnitude more abundant in the central and eastern islands, relative to the western islands. This pattern was consistent among the three sources of data and for both shallow and deep waters. This study, therefore, shows differences in the abundance of batoids across an oceanic archipelago, likely related to varying insular shelf area, availability of habitats, and proximity to the nearby continental (African) mass. Large variation in population abundances among islands suggests that “whole” archipelago management strategies are unlikely to provide adequate conservation. Instead, management plans should be adjusted individually per island and complemented with focused research to fill data gaps on the spatial use and movements of these iconic species.
Год издания: 2021
Авторы: Fernando Tuya, Ricardo Aguilar, Fernando Espino, Néstor E. Bosch, Eva K. M. Meyers, David Jiménez‐Alvarado, J.J. Castro, Francisco Otero‐Ferrer, Ricardo Haroun
Издательство: Wiley
Источник: Ecology and Evolution
Ключевые слова: Ichthyology and Marine Biology, Marine animal studies overview, Coral and Marine Ecosystems Studies
Другие ссылки: Ecology and Evolution (HTML)
DOAJ (DOAJ: Directory of Open Access Journals) (HTML)
Acceda (Universidad de Las Palmas de Gran Canaria) (PDF)
Acceda (Universidad de Las Palmas de Gran Canaria) (HTML)
PubMed Central (HTML)
PubMed (HTML)