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Artículo

Comparative populational study of Lepidonotothen larseni and L. nudifrons (Teleostei: Nototheniidae) from the Antarctic Peninsula and the South Shetland Islands, Antarctica

Deli Antoni, Mariana YanelIcon ; Delpiani, Sergio MatiasIcon ; González Castro, MarianoIcon ; Blasina, Gabriela ElizabethIcon ; Spath, María CeciliaIcon ; Delpiani, Gabriela ElinaIcon ; Ashikaga, Fernando; Cruz, Vanessa P; Oliveira, Claudio; Díaz de Astarloa, Juan MartínIcon
Fecha de publicación: 07/2019
Editorial: Springer
Revista: Polar Biology
ISSN: 0722-4060
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Conservación de la Biodiversidad

Resumen

Most Antarctic notothenioids exhibit clear geographic structure at large scales of spatial separation, generally between populations off different Ocean sectors. At smaller distances, there is great variation in the extent of population structuring. The Antarctic Peninsula and the archipelago of the South Shetland Islands are separated by a narrow strait of deep water (1000 m). Despite the proximity of these two areas, the confluence of water masses of different origins establishes frontal systems and local gyres which may preclude migration between shelf populations. Among the most abundant fish species in the area, the painted notothen Lepidonotothen larseni and the gaudy notothen Lepidonotothen nudifrons are two of the most numerous and widely distributed. In the present study, the genetic and morphological population structure of these closely related species was evaluated between the Antarctic Peninsula and the South Shetland Islands. Nine meristic counts, 18 inter-landmark distances and a mitochondrial DNA marker (D-loop) were analyzed. Populations of L. nudifrons were significantly different based on both, morphogeometric and genetic analyses, while L. larseni showed no population differentiation. The results showed a moderate structuring not correlated with distance between L. nudifrons populations off the Antarctic Peninsula and the South Shetland Islands. These findings provide evidence that differences between the studied species may be linked to key life history events, such as timing and location of egg development, hatching times and dispersal period of larvae. The present data suggest that notothenioid population structuring at regional scale may be related to a combination of life history traits, oceanographic features and local adaptation.
Palabras clave: NOTOTHENIOIDEI , ANTARTIC FISHES , SOUTHERN OCEAN , LANDMARK-BASED MORPHOMETRY , MITOCHONDRIAL DNA
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/122333
URL: http://link.springer.com/10.1007/s00300-019-02540-1
DOI: https://doi.org/10.1007/s00300-019-02540-1
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Deli Antoni, Mariana Yanel; Delpiani, Sergio Matias; González Castro, Mariano; Blasina, Gabriela Elizabeth; Spath, María Cecilia; et al.; Comparative populational study of Lepidonotothen larseni and L. nudifrons (Teleostei: Nototheniidae) from the Antarctic Peninsula and the South Shetland Islands, Antarctica; Springer; Polar Biology; 42; 8; 7-2019; 1537-1547
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