Behavioral event occurrence differs between behavioral states in Sotalia guianensis (Cetarctiodactyla: Delphinidae) dolphins: a multivariate approach

Tardin, Rodrigo H.; Pinto, Míriam Plaza; Alves, Maria Alice S.; Simão, Sheila M.

doi:10.1590/s1984-46702014000100001

Cited by 7 publications

(2 citation statements)

References 32 publications

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“…Although a connection between behavioural state and specific behavioural events has been identified for Guiana dolphins ( Sotalia guianesis ) (Tardin et al, 2014), a similar significant link was not observed for bottlenose dolphins in this study. This could be due to species‐specific differences, or possibly a result of the ‘eye in the sky’ surveying platform better quantifying underwater behaviours.…”

Section: Discussioncontrasting

confidence: 56%

Responses of bottlenose dolphins (Tursiops spp.) to small drones

Giles

Butcher

Colefax

et al. 2020

Aquatic Conservation

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Recent advances in aerial drones offer new insights into the biology, ecology and behaviour of marine wildlife found on or near the ocean’s surface. While opening up new opportunities for enhanced wildlife monitoring, the impacts of drone sampling and how it might influence interpretations of animal behaviour are only just beginning to be understood. The capacity of drones to record bottlenose dolphin (Tursiops spp.) behaviour was investigated, along with how the presence of a small drone at varying altitudes influences dolphin behaviour. Over 3 years and eight locations, 361 drone flights were completed between altitudes of 5 and 60 m above the ocean. Analyses showed that dolphins were increasingly likely to change behaviour with decreasing drone altitude. A positive correlation was also found between time spent hovering above a group of dolphins and the probability of recording a behavioural response. Dolphin group size also influenced the frequency of an observed behavioural change, displaying a positive correlation between behaviour change and group size. Overall, although drones have the potential to impact coastal dolphins when flown at low altitudes, they represent a useful tool for collecting ecological information on coastal dolphins owing to their convenience, low cost and capacity to observe behaviours underwater. To maximize benefits and minimize impacts, this study suggests that drones should be flown 30 m above coastal bottlenose dolphins.

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Section: Discussioncontrasting

confidence: 56%

Responses of bottlenose dolphins (Tursiops spp.) to small drones

Giles

Butcher

Colefax

et al. 2020

Aquatic Conservation

View full text Add to dashboard Cite

show abstract

“…Behaviors can be measured as instantaneous events by frequency (number of occurrences) or as states (time spent performing behavior, Altmann, 1974), or contextualizing events within states, when several events are clustered within a state (Tardin, Pinto, Alves, & Simão, 2014). Because there are no known ethograms, activity budgets, or behavioral assays for this species, and because we had high definition videos that could be repeatedly rescored, we elected to record states by four measures: the number of times each behavior was recorded (discrete events), total duration of all discrete events, the mean duration of each behavior, and the percentage of the behavior across the focal period.…”

Section: Behaviors States and Eventsmentioning

confidence: 99%