Aggression in bottlenose dolphins: Evidence for sexual coercion, male-male competition, and female tolerance through analysis of tooth-rake marks and behaviour

@article{Scott2005AggressionIB,
  title={Aggression in bottlenose dolphins: Evidence for sexual coercion, male-male competition, and female tolerance through analysis of tooth-rake marks and behaviour},
  author={Erin M Scott and Janet Mann and Jana J. Watson-Capps and Brooke L. Sargeant and Richard C. Connor},
  journal={Behaviour},
  year={2005},
  volume={142},
  pages={21-44}
}
Aggressive behaviour is rarely observed, but may have a large impact on the social structure, relationships and interactions in animal societies. Long-term behavioural study of Indian Ocean bottlenose dolphins in Shark Bay, Australia, suggests that males are more aggressive than females, and use sexual coercion during the breeding season, but age and sex-specific patterns of aggression have not been well documented. We analyzed tooth rake marks, an indirect measure of received conspecific… Expand

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References

SHOWING 1-10 OF 52 REFERENCES
Female-Directed Aggression in Free-Ranging Ateles geoffroyi
TLDR
It is indicated that female reproductive state, as determined by fecal steroid metabolites (E1C and PdG), had an inconsistent effect on the frequency of attacks received, suggesting that sexual coercion does not sufficiently explain the behavior of black-handed spider monkeys. Expand
Male Aggression and Sexual Coercion of Females in Nonhuman Primates and Other Mammals: Evidence and Theoretical Implications
Although Trivers' general rule has many exceptions, it accurately identifies the primary source of conflict between the sexes: in most sexual organisms most of the energy and time invested inExpand
SHARK ATTACKS ON BOTTLENOSE DOLPHINS (TURSIOPS ADUNCUS) IN SHARK BAY, WESTERN AUSTRALIA: ATTACK RATE, BITE SCAR FREQUENCIES, AND ATTACK SEASONALITY
TLDR
The frequency of shark-inflicted scars and the shark attack rate on bottlenose dolphins in Shark Bay, Western Australia suggest that Shark Bay dolphins face a greater risk of predation than bottlenOSE dolphins in other locations. Expand
Ranging and association patterns of paired and unpaired adult male Atlantic bottlenose dolphins, Tursiops truncatus, in Sarasota, Florida, provide no evidence for alternative male strategies
Previous studies of Atlantic bottlenose dolphin, Tursiops truncatus, social structure near Sarasota, Florida, revealed two distinct patterns of ranging and association among paired and unpaired adultExpand
A quantitative assessment of dominance relations among bottlenose dolphins
TLDR
Zoo-based research revealed patterns of behavior that conformed to current knowledge about bottlenose dolphin social structure and facilitated development of a quantitative technique that can be used to assess cetacean dominance relationships in field research. Expand
Sexual Behavior of Male Northern Elephant Seals: I. Lethal Injuries To Adult Females
TLDR
Based on the observed incidence of female mortality in relation to females present on the rookery, the probability of a female being killed by a male during the breeding season is about one in a thousand; females are expected to evolve adaptations to reduce injurious encounters with males. Expand
Female reproductive success in bottlenose dolphins (Tursiops sp.): life history, habitat, provisioning, and group-size effects
TLDR
Examination of factors influencing female reproductive success in wild Indian Ocean bottlenose dolphins in Shark Bay, Australia finds shallow water may allow mothers and calves to detect and avoid predatory sharks. Expand
Evidence for infanticide in bottlenose dolphins: an explanation for violent interactions with harbour porpoises?
TLDR
It is suggested that infanticide must be considered as a factor shaping sociality in this and other species of cetaceans, and may have serious consequences for the viability of small populations. Expand
Sexual selection in Japanese macaques I: female mate choice or male sexual coercion?
TLDR
In a confined group of Japanese macaques, Macaca fuscata fuscatahoused, behavioural and endocrine data were combined to assess the validity of several mate-choice behaviours and the potential influence of sexual coercion, and a tentative model of mate choice for this species is proposed. Expand
Patterns of Female Attractiveness in Indian Ocean Bottlenose Dolphins
TLDR
In Shark Bay, Western Australia, it is documented for the first time patterns of female attractiveness that may correspond to multiple oestrous cycles, supporting predictions of a promiscuous mating system in bottlenose dolphins. Expand
...
1
2
3
4
5
...