Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)?
Freshwater bivalves of the order Unionoida display an uncommon phenotypic plasticity with high interpopulation and intrapopulation morphological variability, which could be advantageous for coping with habitat modifications. However, unionoids have suffered a marked population decline in different p...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19360584_v11_n2_p_Yusseppone http://hdl.handle.net/20.500.12110/paper_19360584_v11_n2_p_Yusseppone |
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paper:paper_19360584_v11_n2_p_Yusseppone2023-06-08T16:32:07Z Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)? Diplodon chilensis geometric morphometric lake ontogeny Patagonia river Biology Curve fitting Ecosystems Lakes Molluscs Population statistics Shells (structures) Water Diplodon chilensis Geometric morphometric Habitat modification Intra-population variability Morphological variability ontogeny Patagonia Phenotypic plasticity Rivers Bivalvia Diplodon chilensis Hyriidae Unionoida Freshwater bivalves of the order Unionoida display an uncommon phenotypic plasticity with high interpopulation and intrapopulation morphological variability, which could be advantageous for coping with habitat modifications. However, unionoids have suffered a marked population decline in different parts of the world in the last decades. A decline in some populations of the South American long-lived freshwater mussel Diplodon chilensis as a consequence of habitat deterioration has recently been recorded. Ontogenetic allometry and shape variation in shells of D. chilensis from 2 different sites, Paimun lake and Chimehuin river, North Patagonia, Argentina, have been studied. For these purposes, geometric morphometric methods were used. Shell shape shows differences between sites, which the shells from Chimehuin river show less intrapopulation variability; are more elongated, with the anterior part extended upwards and the posterior part downwards; and show a steeper anterior curvature at the umbo compared to those from Paimún lake. These characteristics make shell shape more streamlined to withstand river current. Furthermore, the extended posterior-ventral part in river shells coincides with higher foot weight that would improve anchoring to the river rocky–sandy substrate. River shells present a bounded eco-morphotype whereas the higher variability of lake shells includes the “river eco-morphotype.” Growth is allometric throughout life in both sites and is not sex-dependent. The success of river repopulation programmes using mussels from lake populations may be increased by transplanting selected individuals that show “river eco-morphotype.”. Copyright © 2017 John Wiley & Sons, Ltd. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19360584_v11_n2_p_Yusseppone http://hdl.handle.net/20.500.12110/paper_19360584_v11_n2_p_Yusseppone |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Diplodon chilensis geometric morphometric lake ontogeny Patagonia river Biology Curve fitting Ecosystems Lakes Molluscs Population statistics Shells (structures) Water Diplodon chilensis Geometric morphometric Habitat modification Intra-population variability Morphological variability ontogeny Patagonia Phenotypic plasticity Rivers Bivalvia Diplodon chilensis Hyriidae Unionoida |
| spellingShingle |
Diplodon chilensis geometric morphometric lake ontogeny Patagonia river Biology Curve fitting Ecosystems Lakes Molluscs Population statistics Shells (structures) Water Diplodon chilensis Geometric morphometric Habitat modification Intra-population variability Morphological variability ontogeny Patagonia Phenotypic plasticity Rivers Bivalvia Diplodon chilensis Hyriidae Unionoida Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)? |
| topic_facet |
Diplodon chilensis geometric morphometric lake ontogeny Patagonia river Biology Curve fitting Ecosystems Lakes Molluscs Population statistics Shells (structures) Water Diplodon chilensis Geometric morphometric Habitat modification Intra-population variability Morphological variability ontogeny Patagonia Phenotypic plasticity Rivers Bivalvia Diplodon chilensis Hyriidae Unionoida |
| description |
Freshwater bivalves of the order Unionoida display an uncommon phenotypic plasticity with high interpopulation and intrapopulation morphological variability, which could be advantageous for coping with habitat modifications. However, unionoids have suffered a marked population decline in different parts of the world in the last decades. A decline in some populations of the South American long-lived freshwater mussel Diplodon chilensis as a consequence of habitat deterioration has recently been recorded. Ontogenetic allometry and shape variation in shells of D. chilensis from 2 different sites, Paimun lake and Chimehuin river, North Patagonia, Argentina, have been studied. For these purposes, geometric morphometric methods were used. Shell shape shows differences between sites, which the shells from Chimehuin river show less intrapopulation variability; are more elongated, with the anterior part extended upwards and the posterior part downwards; and show a steeper anterior curvature at the umbo compared to those from Paimún lake. These characteristics make shell shape more streamlined to withstand river current. Furthermore, the extended posterior-ventral part in river shells coincides with higher foot weight that would improve anchoring to the river rocky–sandy substrate. River shells present a bounded eco-morphotype whereas the higher variability of lake shells includes the “river eco-morphotype.” Growth is allometric throughout life in both sites and is not sex-dependent. The success of river repopulation programmes using mussels from lake populations may be increased by transplanting selected individuals that show “river eco-morphotype.”. Copyright © 2017 John Wiley & Sons, Ltd. |
| title |
Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)? |
| title_short |
Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)? |
| title_full |
Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)? |
| title_fullStr |
Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)? |
| title_full_unstemmed |
Does shell shape variation play a role in conservation of the long-lived freshwater bivalve Diplodon chilensis (Bivalvia, Hyriidae)? |
| title_sort |
does shell shape variation play a role in conservation of the long-lived freshwater bivalve diplodon chilensis (bivalvia, hyriidae)? |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19360584_v11_n2_p_Yusseppone http://hdl.handle.net/20.500.12110/paper_19360584_v11_n2_p_Yusseppone |
| _version_ |
1768543346712641536 |