Behavioural observations of bottlenose dolphins towards two dead conspecifics

Dudzinski, Kathleen M.; Sakai, Mai; Masaki, K.; Kogi, Kazunobu; Hishii, Toru; Kurimoto, Masashi

doi:10.1578/016754203101023951

Cited by 55 publications

(37 citation statements)

References 0 publications

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“…The supportive behaviors the DD received appear to be independent of her body position, although as noted above, it is possible that her continued use of this vertical posture somehow signaled distress to the others in her group. The minimal movement of the DD in the vertical position might also be a method of energy conservation, as it is consistent with reports that vertical posturing typically requires minimal active effort (Dudzinski et al, 2003).…”

Section: Discussionsupporting

confidence: 83%

“…Vertical posturing has been observed in a variety of contexts, including spontaneous pointing behavior in bottlenose dolphins (Xitco, Gory, & Kuczaj, 2001), orienting toward dead conspecifics (Dudzinski et al, 2003), and mating avoidance in spinner dolphins (Silva, Silva, & Sazima, 2005). Vertical positioning with limited to no active movement by a dolphin has also been seen in play behavior in bottlenose dolphins (Kuczaj & Makecha, 2008).…”

Section: Discussionmentioning

confidence: 99%

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Underwater observations of dolphin reactions to a distressed conspecific

et al. 2015

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This report describes the epimeletic (or Bcaregiving^) behavior produced by members of a group of Atlantic bottlenose dolphins (Tursiops truncatus) and the possible role of the ailing animal's distress call in eliciting such behavior. Epimeletic behavior in cetaceans most typically involves forms of support provided to a distressed, injured, or dying animal (Caldwell & Caldwell, 1966). Analyses of underwater video and corresponding acoustic recordings revealed a distressed dolphin (the DD) that frequently produced what are most likely distress calls, often paired with the emission of long bubble streams. The frequency of her whistle production was positively correlated with the frequency of the supporting behaviors the DD received from other dolphins. These helping behaviors included raft formations, lifts, and stimulating pushes that were predominantly directed toward the upper third of the DD's body, all of which appeared to be directed towards bringing the DD toward the surface so that she could breathe. This is the first documented underwater account of multiple wild bottlenose dolphins providing epimeletic care to a distressed conspecific, and highlights the possible role of distress calls in such scenarios.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Underwater observations of dolphin reactions to a distressed conspecific

et al. 2015

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“…The social bonding hypothesis suggests that group-living animals should use potentially risky interactions to regularly reinforce affiliative relationships (Zahavi, 1977). Dolphins engage in agonistic behaviors during socio-sexual and play activities that could result in serious injuries (Dudzinski et al, 2003;Harvey, 2015;Östman, 1991;Overstrom, 1983). We postulate that dolphins have a mechanism to mitigate these agonistic actions and propose the following predictions to address this hypothesis.…”

Section: Alternative Hypothesesmentioning

confidence: 97%

Pectoral fin contact as a mechanism for social bonding among dolphins

Dudzinski¹,

Ribic²

2017

AB&C

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“…From the results obtained can be identified as the whistle sounds emanating from dolphins by calculating or viewing range interval whistle sound itself [16]. Highest intensity on a whistle 4 can also be affected by the position with the position of the dolphin is horizontal, because according to [17][18][19][20] movement in the vertical position will probably affect the magnitude of the sound and the inconsistency of the sound emitted by the dolphins using conservation methods energy obtained by dolphins, and will require a lot of energy to expend greater voice intensity value (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Bioacoustic Spectral Whistle Sound and Behaviour of Male Dolphin Bottle Nose (Tursiops aduncus) at Safari Park Indonesia, Cisarua Bogor

Lubis¹,

Wulandari²

2016

J Marine Sci Res Dev

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Whistle sound is generally used for echolocation purposes, while the sound of the blast-beat and whistles play a major role in internal and inter-group communication. The purpose of this research is to know the power spectral patterns and fluctuations in sound based on frequency and Power Spectral Density (PSD) of the sounds produced by dolphins and observing the position of dolphins, Noisy Time Domain (NTD) and behavior using underwater camera, and also comparing between time and sound spectrum. Data recording was taken at the Safari Park of Cisarua Bogor in Indonesia, by taking data in show pool and show pool. The results showed that salinity before feeding time in the show pool with replication 1,2, and 3 has salinity value that is equal to 30%. Data at the show pool before feeding with replications 1,2, and 3 has a salinity of 29%. Power Spectral Density (PSD) of the whistle sound before feeding was different from one another, but it has the same frequency range. The highest intensity values is at sound whistle 3 before feeding time at the show pool with an intensity value of 28.03 dB/Hz with frequency interval of 14642-16000 Hz. F-test at the show pool before meals has heterogeneous value. Treat before meals at the show pool has a value of P < 0.001 and P < 0.001. Value Noisy Time Domain has differences with each other and has a lot of different sound patterns. In general, there are real differences are evidenced by F test on a range of time at each whistle on physiotherapy and swimming pool show in the time before meals. The position of dolphins in a pool show more dominant and often in the bottom of the pool, the position of the dolphins affects the frequency.

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Behavioural observations of bottlenose dolphins towards two dead conspecifics

Cited by 55 publications

References 0 publications

Underwater observations of dolphin reactions to a distressed conspecific

Underwater observations of dolphin reactions to a distressed conspecific

Pectoral fin contact as a mechanism for social bonding among dolphins

Bioacoustic Spectral Whistle Sound and Behaviour of Male Dolphin Bottle Nose (Tursiops aduncus) at Safari Park Indonesia, Cisarua Bogor

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