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Artículo

Allometric differences on the shell shape of two scorched mussel species along the Atlantic South American Coast

Marquez, FedericoIcon ; Adami, Mariana LauraIcon ; Trovant, BereniceIcon ; Nieto Vilela, Rocío AiméIcon ; González José, RolandoIcon
Fecha de publicación: 02/2018
Editorial: Springer
Revista: Evolutionary Ecology
ISSN: 0269-7653
e-ISSN: 1573-8477
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Biología Marina, Limnología

Resumen

Scorched mussels (Bivalvia: Mytilidae) are an important component of rocky shore assemblages around the world. The mussel beds of the mid-intertidal coasts of the south-western Atlantic are composed of two species of scorched mussels, which dominate the physiognomy and structure of the rocky shore communities. The present study investigates the variation in the shell-shape allometric trajectories of both species of mussels throughout their distributional range in the southwestern Atlantic coast, from latitude 34°S to 53°S. Shells of Brachidontes rodriguezii were collected at two Uruguayan localities and four Argentinean localities, while shells of Perumytilus purpuratus were collected at six Argentinean localities. Shell shapes of the specimens were studied by geometric morphometrics using landmark and semi-landmark methods. Different evolutionary histories and thermal regimes characterize these two species. Brachidontes rodriguezii seems to have a long history in the region and is present in a restricted area, the warm temperate region of the south-western Atlantic, while P. purpuratus seems to have a recent history and is present in a wide thermal range, involving the cold-temperate regions of the south-western Atlantic and south-eastern Pacific and the warm-temperate region of the south-eastern Pacific. Based on these considerations, we prompt the hypothesis that allometric trajectories of P. purpuratus shell shape is more variable and adapted to a specific habitat than B. rodriguezii. The impact of allometry was larger in P. purpuratus than in B. rodriguezii. Graphical evidence was gathered, showing that these two species differ in allometric growth forms and that the allometric shell morphology changes reflect environmental constraints and adaptation. While the intertidal mussel beds of the South American coasts are ecologically similar in appearance, we found that the allometric variation of the scorched mussels occurs in response to diverging evolutionary processes such as phenotypic plasticity in P. purpuratus and canalization in B. rodriguezii.
Palabras clave: ONTOGENY , SHELL SHAPE VARIATION , SOUTHWESTERN ATLANTIC , PLASTICITY , CANALIZATION
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info:eu-repo/semantics/openAccess 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/11336/88279
URL: https://link.springer.com/article/10.1007%2Fs10682-018-9928-5
DOI: https://doi.org/10.1007/s10682-018-9928-5
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(IBIOMAR)
Articulos de INSTITUTO DE BIOLOGIA DE ORGANISMOS MARINOS
Articulos(IDEAUS)
Articulos de INSTITUTO DE DIVERSIDAD Y EVOLUCION AUSTRAL
Articulos(IPCSH)
Articulos de INSTITUTO PATAGONICO DE CIENCIAS SOCIALES Y HUMANAS
Citación
Marquez, Federico; Adami, Mariana Laura; Trovant, Berenice; Nieto Vilela, Rocío Aimé; González José, Rolando; Allometric differences on the shell shape of two scorched mussel species along the Atlantic South American Coast ; Springer; Evolutionary Ecology; 32; 1; 2-2018; 43-56
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