The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat
Fast-swimming dolphins have a relatively stable morphological configuration, explained partially by their vertebral morphology. The hourglass dolphin (Lagenorhynchus cruciger), an oceanic species, is one of the least known species of small odontocetes. The aim of this paper is to describe the osteol...
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_01675427_v42_n3_p306_Marchesi |
| Aporte de: |
| id |
todo:paper_01675427_v42_n3_p306_Marchesi |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_01675427_v42_n3_p306_Marchesi2023-10-03T15:04:56Z The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat Marchesi, M.C. Pimper, L.E. Mora, M.S. Goodall, R.N.P. Functional morphology Hourglass dolphin Lagenorhynchus cruciger Osteology Vertebral column cranium dolphin functional morphology osteology skeleton Lagenorhynchus cruciger Fast-swimming dolphins have a relatively stable morphological configuration, explained partially by their vertebral morphology. The hourglass dolphin (Lagenorhynchus cruciger), an oceanic species, is one of the least known species of small odontocetes. The aim of this paper is to describe the osteology of the vertebral column of this species, relating the main morphological characteristics to swimming performance in an oceanic habitat. We also present five new records, with meristics and measurements of the postcranial skeleton in conjunction with an exhaustive characterization of each functional region of the vertebral column through morphometric and graphical interpretations. In this species, the stability of the mid-torso is reinforced by the lumbarization and high number of vertebrae. While the morpho-logical process indicates a mechanical advantage for the swimming muscles, the mid-torso appears to act as an "oscillatory beam" to store potential energy, working as an elastic spring. Tail displacements are mainly produced by the flexion of the peduncle, which undulates from a stable mid-region. As suggested for other fast-swimming dolphins, morphological adaptations in the hourglass dolphin fit a typical pelagic mode of life, with a highly stable column that minimizes energy consumption, increasing efficiency for prolonged swimming. Fil:Pimper, L.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01675427_v42_n3_p306_Marchesi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Functional morphology Hourglass dolphin Lagenorhynchus cruciger Osteology Vertebral column cranium dolphin functional morphology osteology skeleton Lagenorhynchus cruciger |
| spellingShingle |
Functional morphology Hourglass dolphin Lagenorhynchus cruciger Osteology Vertebral column cranium dolphin functional morphology osteology skeleton Lagenorhynchus cruciger Marchesi, M.C. Pimper, L.E. Mora, M.S. Goodall, R.N.P. The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat |
| topic_facet |
Functional morphology Hourglass dolphin Lagenorhynchus cruciger Osteology Vertebral column cranium dolphin functional morphology osteology skeleton Lagenorhynchus cruciger |
| description |
Fast-swimming dolphins have a relatively stable morphological configuration, explained partially by their vertebral morphology. The hourglass dolphin (Lagenorhynchus cruciger), an oceanic species, is one of the least known species of small odontocetes. The aim of this paper is to describe the osteology of the vertebral column of this species, relating the main morphological characteristics to swimming performance in an oceanic habitat. We also present five new records, with meristics and measurements of the postcranial skeleton in conjunction with an exhaustive characterization of each functional region of the vertebral column through morphometric and graphical interpretations. In this species, the stability of the mid-torso is reinforced by the lumbarization and high number of vertebrae. While the morpho-logical process indicates a mechanical advantage for the swimming muscles, the mid-torso appears to act as an "oscillatory beam" to store potential energy, working as an elastic spring. Tail displacements are mainly produced by the flexion of the peduncle, which undulates from a stable mid-region. As suggested for other fast-swimming dolphins, morphological adaptations in the hourglass dolphin fit a typical pelagic mode of life, with a highly stable column that minimizes energy consumption, increasing efficiency for prolonged swimming. |
| format |
JOUR |
| author |
Marchesi, M.C. Pimper, L.E. Mora, M.S. Goodall, R.N.P. |
| author_facet |
Marchesi, M.C. Pimper, L.E. Mora, M.S. Goodall, R.N.P. |
| author_sort |
Marchesi, M.C. |
| title |
The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat |
| title_short |
The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat |
| title_full |
The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat |
| title_fullStr |
The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat |
| title_full_unstemmed |
The vertebral column of the hourglass dolphin (Lagenorhynchus cruciger, Quoy and Gaimard, 1824), with notes on its functional properties in relation to its habitat |
| title_sort |
vertebral column of the hourglass dolphin (lagenorhynchus cruciger, quoy and gaimard, 1824), with notes on its functional properties in relation to its habitat |
| url |
http://hdl.handle.net/20.500.12110/paper_01675427_v42_n3_p306_Marchesi |
| work_keys_str_mv |
AT marchesimc thevertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat AT pimperle thevertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat AT morams thevertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat AT goodallrnp thevertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat AT marchesimc vertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat AT pimperle vertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat AT morams vertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat AT goodallrnp vertebralcolumnofthehourglassdolphinlagenorhynchuscrucigerquoyandgaimard1824withnotesonitsfunctionalpropertiesinrelationtoitshabitat |
| _version_ |
1782025780158529536 |