Multi-method approach shows stock structure in Loligo forbesii squid

Autor: Sheerin, Edel, Barnawall, Leigh, Abad, Esther, Larivain, Angela, Oesterwind, Daniel, Petroni, Michael, Perales-Raya, Catalina, Robin, Jean-Paul, Sobrino, Ignacio, Valeiras, Julio, O'Meara, Denise, Pierce, Graham, a Louise And, Power, Anne, Marie, Barnwall, Leigh, Allcock, Louise, Power, Anne Marie
Přispěvatelé: Martin Ryan Institute, National University of Ireland [Galway] (NUI Galway), Instituto Espagňol de Oceanografia (IEO), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Thünen Institute, Waterford Institute of Technology (WIT), IIM CSIC
Rok vydání: 2022
Předmět:
Zdroj: e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía
instname
Digital.CSIC. Repositorio Institucional del CSIC
ICES Journal of Marine Science
ICES Journal of Marine Science, 2022, ⟨10.1093/icesjms/fsac039⟩
ISSN: 1095-9289
1054-3139
DOI: 10.1093/icesjms/fsac039
Popis: 16 pages, 5 tables, 6 figures.-- This is an Open Access article distributed under the terms of the Creative Commons Attribution License
Knowledge of stock structure is a priority for effective assessment of commercially-fished cephalopods. Loligo forbesii squid are thought to migrate inshore for breeding and offshore for feeding and long-range movements are implied from past studies showing genetic homogeneity in the entire neritic population. Only offshore populations (Faroe and Rockall Bank) were considered distinct. The present study applied mitchondrial and microsatellite markers (nine loci) to samples from Rockall Bank, north Scotland, North Sea, various shelf locations in Ireland, English Channel, northern Bay of Biscay, north Spain, and Bay of Cadiz. No statistically significant genetic sub-structure was found, although some non-significant trends involving Rockall were seen using microsatellite markers. Differences in L. forbesii statolith shape were apparent at a subset of locations, with most locations showing pairwise differences and statoliths from north Ireland being highly distinct. This suggests that (i) statolith shape is highly sensitive to local conditions and (ii) L. forbesii forms distinguishable groups (based on shape statistics), maintaining these groups over sufficiently long periods for local conditions to affect the shape of the statolith. Overall evidence suggests that L. forbesii forms separable (ecological) groups over short timescales with a semi-isolated breeding group at Rockall whose distinctiveness varies over time
This research comes from the Cephs & Chefs project (https://www.cephsandchefs.com/) and was funded by the European Regional Development Fund through the Interreg Atlantic Area Programme grant number EAPA_282/2016
Databáze: OpenAIRE
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