Behavioural evidence for social units in long-finned pilot whales

@article{Ottensmeyer2003BehaviouralEF,
  title={Behavioural evidence for social units in long-finned pilot whales},
  author={C. Andrea Ottensmeyer and Hal Whitehead},
  journal={Canadian Journal of Zoology},
  year={2003},
  volume={81},
  pages={1327-1338}
}
In general, mammal species show geographic or social dispersal by one or both sexes. Long-term behavioural observations and genetic evidence have confirmed that fish-eating resident killer whales, Orcinus orca, are a rare exception. Female and male offspring travel with their mothers for their whole lives: this is natal group philopatry. It is suspected that pilot whales, Globicephala spp., also follow this social pattern, but longitudinal data on the social structure of live long-finned pilot… 

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References

SHOWING 1-10 OF 65 REFERENCES
Social organisation of the short-finned pilot whale, 'Globicephala macrorhynchus', with special reference to the comparitive social ecology of Delphinids
TLDR
The hypothesis that males and females mate when associating with individuals from other pods is supported, which could evolve from a promiscuous mating system where there is little guarantee of paternity and where males that live with their kin increase their inclusive fitness.
Social Affiliations within Sperm Whale (Physeter macrocephalus) Groups
TLDR
It is observed that sperm whales in the eastern tropical Pacific quite consistently associated with members of their own social unit more than they did with other animals in their group with whom they did not share a long-term relationship, suggesting that relationships are quite homogeneous within social units.
Sperm whale social units : variation and change
TLDR
Sperm whale photoidentification data spanning 12 years of study around the Galapagos Islands were examined to investigate the size, variability, and stability of social units, suggesting that the benefits of remaining in a social unit usually outweigh selection for some optimal unit size.
Breeding behaviour of pilot whales revealed by DNA fingerprinting
TLDR
Paternity analysis of mother-fetus pairs and males sampled from complete pods of long-finned pilot whales in the Faeroe Islands suggests that pods consist of closely related adult females and their offspring.
Population structure of long‐finned pilot whales in the North Atlantic: a correlation with sea surface temperature?
TLDR
This work uses eight highly polymorphic microsatellite loci to analyse samples from four disparate sampling sites to indicate that substructure does exist, and is particularly pronounced between West Greenland and other sites, and supports a simple isolation‐by‐distance model.
Feeding ecology of long-finned pilot whales Globicephala melas in the western North Atlantic
TLDR
The divers~ty of prey in this study was greater than previous reports of the food hablts of western North Atlantic long-finned pilot whales, and large yearly fluctuat~ons in prey importance were noted.
Morphometric segregation of long-finned pilot whales in eastern and western North Atlantic
TLDR
Discriminant analysis performed on morphometric measurements of pilot whales showed significant differences between the samples obtained in Faroese and Newfoundland waters, suggested that these differences may be caused by the isolation resulting from the physical barrier created by the front between the North Atlantic-Irminger Current and the East Greenland-Labrador Current.
Intestinal helminths as indicators of segregation and social structure of pods of long-finned pilot whales (Globicephala melas) off the Faeroe Islands
TLDR
Adult males were more difficult to allocate to pods than the remainder, and the omission of these animals significantly improved the classification results in a canonical analysis, suggesting a certain degree of geographical, seasonal, or behavioural segregation of pods of Faeroese pilot whales.
Population size and residency patterns of northern bottlenose whales (Hyperoodon ampullatus) using the Gully, Nova Scotia
A population of northern bottlenose whales (Hyperoodon ampullatus) uses the Gully, a submarine canyon off the coast of Nova Scotia, Canada. Eleven years of photo-identification records has permitted
STOMACH CONTENTS OF LONG‐FINNED PILOT WHALES (GLOBICEPHALA MELAS) STRANDED ON THE U.S. MID‐ATLANTIC COAST
TLDR
The results indicate that the diets of western North Atlantic long-finned pilot whales differ substantially from what has been previously reported in the literature and that results from food-habits studies that utilize different techniques may not be comparable.
...
1
2
3
4
5
...