Interpopulational differences in the nutritional condition of Aequiyoldia eightsii (Protobranchia: Nuculanidae) from the Western Antarctic Peninsula during austral summer.

Autor:	Bascur M; Departamento de Ecología, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile.; Programa de Magister en Ecología Marina, Universidad Católica de la Santísima Concepción, Concepción, Chile., Morley SA; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom., Meredith MP; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom., Muñoz-Ramírez CP; Instituto de Entomología, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile., Barnes DKA; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom., Schloss IR; Instituto Antártico Argentino, Buenos Aires, Argentina.; Centro Austral de Investigaciones Científicas (CADIC-CONICET), Ushuaia, Argentina.; Universidad Nacional de Tierra del Fuego, Ushuaia, Argentina., Sands CJ; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom., Schofield O; Center for Ocean Observing Leadership, Department of Marine and Coastal Sciences, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, United States., Román-Gonzaléz A; College of Life and Environmental Sciences, University of Exeter, Cornwall, United Kingdom., Cárdenas L; Centro FONDAP de Investigación en Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile.; Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile., Venables H; British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom., Brante A; Departamento de Ecología, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile.; Centro de Investigación en Biodiversidad y Ambientes Sustentables (CIBAS), Universidad Católica de la Santísima Concepción, Concepción, Chile., Urzúa Á; Departamento de Ecología, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile.; Centro de Investigación en Biodiversidad y Ambientes Sustentables (CIBAS), Universidad Católica de la Santísima Concepción, Concepción, Chile.
Jazyk:	angličtina
Zdroj:	PeerJ [PeerJ] 2021 Dec 21; Vol. 9, pp. e12679. Date of Electronic Publication: 2021 Dec 21 (Print Publication: 2021).
DOI:	10.7717/peerj.12679
Abstrakt:	The Western Antarctic Peninsula (WAP) is a hotspot for environmental change and has a strong environmental gradient from North to South. Here, for the first time we used adult individuals of the bivalve Aequiyoldia eightsii to evaluate large-scale spatial variation in the biochemical composition (measured as lipid, protein and fatty acids) and energy content, as a proxy for nutritional condition, of three populations along the WAP: O'Higgins Research Station in the north (63.3°S), Yelcho Research Station in mid-WAP (64.9°S) and Rothera Research Station further south (67.6°S). The results reveal significantly higher quantities of lipids (L), proteins (P), energy (E) and total fatty acids (FA) in the northern population (O'Higgins) (L: 8.33 ± 1.32%; P: 22.34 ± 3.16%; E: 171.53 ± 17.70 Joules; FA: 16.33 ± 0.98 mg g) than in the mid-WAP population (Yelcho) (L: 6.23 ± 0.84%; P: 18.63 ± 1.17%; E: 136.67 ± 7.08 Joules; FA: 10.93 ± 0.63 mg g) and southern population (Rothera) (L: 4.60 ± 0.51%; P: 13.11 ± 0.98%; E: 98.37 ± 5.67 Joules; FA: 7.58 ± 0.48 mg g). We hypothesize these differences in the nutritional condition could be related to a number of biological and environmental characteristics. Our results can be interpreted as a consequence of differences in phenology at each location; differences in somatic and gametogenic growth rhythms. Contrasting environmental conditions throughout the WAP such as seawater temperature, quantity and quality of food from both planktonic and sediment sources, likely have an effect on the metabolism and nutritional intake of this species. Competing Interests: The authors declare that they have no competing interests. (© 2021 Bascur et al.)
Databáze:	MEDLINE
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