Possible functions of the rostrum of Blainville’s beaked whale (Mesoplodon densirostris)

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32 Citations (Scopus)

Abstract

The rostrum of Blainville's beaked whale, Mesoplodon densirostris, becomes secondarily ossified, particularly in males, as individuals mature. This mesorostral ossification forms the densest bone currently known and represents a considerable investment of resources for this species. Three functions for this mesorostral ossification have been proposed: prevention of damage to the rostrum during aggressive male-male interactions, ballast to aid deep diving, and sound transmission. These functions were assessed using data from museum specimens and observations of this species in the wild. Prevention of damage to the rostrum during aggressive male-male interactions was found to be the most likely function, based on the currently available data.

Original languageEnglish
Pages (from-to)178-184
Number of pages6
JournalCanadian Journal Of Zoology/Revue Canadien De Zoologie
Volume80
DOIs
Publication statusPublished - 2002

Keywords

  • ATLANTIC BOTTLENOSE DOLPHIN
  • HYPEROODON AMPULLATUS
  • TURSIOPS-TRUNCATUS
  • DELPHINUS-DELPHIS
  • BEAM
  • MORPHOLOGY
  • ZIPHIIDAE
  • CETACEA

Cite this

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title = "Possible functions of the rostrum of Blainville’s beaked whale (Mesoplodon densirostris)",
abstract = "The rostrum of Blainville's beaked whale, Mesoplodon densirostris, becomes secondarily ossified, particularly in males, as individuals mature. This mesorostral ossification forms the densest bone currently known and represents a considerable investment of resources for this species. Three functions for this mesorostral ossification have been proposed: prevention of damage to the rostrum during aggressive male-male interactions, ballast to aid deep diving, and sound transmission. These functions were assessed using data from museum specimens and observations of this species in the wild. Prevention of damage to the rostrum during aggressive male-male interactions was found to be the most likely function, based on the currently available data.",
keywords = "ATLANTIC BOTTLENOSE DOLPHIN, HYPEROODON AMPULLATUS, TURSIOPS-TRUNCATUS, DELPHINUS-DELPHIS, BEAM, MORPHOLOGY, ZIPHIIDAE, CETACEA",
author = "MacLeod, {Colin D}",
year = "2002",
doi = "10.1139/z01-188",
language = "English",
volume = "80",
pages = "178--184",
journal = "Canadian Journal Of Zoology/Revue Canadien De Zoologie",
issn = "0008-4301",
publisher = "National Research Council of Canada",

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TY - JOUR

T1 - Possible functions of the rostrum of Blainville’s beaked whale (Mesoplodon densirostris)

AU - MacLeod, Colin D

PY - 2002

Y1 - 2002

N2 - The rostrum of Blainville's beaked whale, Mesoplodon densirostris, becomes secondarily ossified, particularly in males, as individuals mature. This mesorostral ossification forms the densest bone currently known and represents a considerable investment of resources for this species. Three functions for this mesorostral ossification have been proposed: prevention of damage to the rostrum during aggressive male-male interactions, ballast to aid deep diving, and sound transmission. These functions were assessed using data from museum specimens and observations of this species in the wild. Prevention of damage to the rostrum during aggressive male-male interactions was found to be the most likely function, based on the currently available data.

AB - The rostrum of Blainville's beaked whale, Mesoplodon densirostris, becomes secondarily ossified, particularly in males, as individuals mature. This mesorostral ossification forms the densest bone currently known and represents a considerable investment of resources for this species. Three functions for this mesorostral ossification have been proposed: prevention of damage to the rostrum during aggressive male-male interactions, ballast to aid deep diving, and sound transmission. These functions were assessed using data from museum specimens and observations of this species in the wild. Prevention of damage to the rostrum during aggressive male-male interactions was found to be the most likely function, based on the currently available data.

KW - ATLANTIC BOTTLENOSE DOLPHIN

KW - HYPEROODON AMPULLATUS

KW - TURSIOPS-TRUNCATUS

KW - DELPHINUS-DELPHIS

KW - BEAM

KW - MORPHOLOGY

KW - ZIPHIIDAE

KW - CETACEA

U2 - 10.1139/z01-188

DO - 10.1139/z01-188

M3 - Article

VL - 80

SP - 178

EP - 184

JO - Canadian Journal Of Zoology/Revue Canadien De Zoologie

JF - Canadian Journal Of Zoology/Revue Canadien De Zoologie

SN - 0008-4301

ER -