Monitoring white whales (Delphinapterus leucas) with echolocation loggers

Castellote, Manuel; Leeney, Ruth H.; O’Corry‐Crowe, Gregory; Lauhakangas, R.; Kovacs, Kit M.; Lucey, William; Krasnova, V. V.; Lydersen, Christian; Stafford, Kathleen M.; Belikov, R. A.

doi:10.1007/s00300-012-1276-2

Cited by 31 publications

(33 citation statements)

References 43 publications

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“…Previous studies have reported the occurrence of click trains during porpoise foraging behavior, with progressively decreasing ICI's ending in a high rate terminal "buzz", with ICI's close to or less than 2 ms during the fi nal prey capture (Verboom and Kastelein, 2003;DeRuiter et al, 2009;Miller, 2010;Wisniewska et al, 2012). This same echolocation behavior has been suggested for feeding belugas (Roy et al, 2010;Castellote et al, 2013).…”

Section: Acoustic Monitoringsupporting

confidence: 59%

“…Time intervals between clicks in echolocation click trains, termed interclick intervals (ICI), have been used as a behavioral indicator in several odontocetes, including harbor porpoise (DeRuiter et al, 2009;Verfuss et al, 2009) and beluga (Roy et al, 2010;Castellote et al, 2013). Previous studies have reported the occurrence of click trains during porpoise foraging behavior, with progressively decreasing ICI's ending in a high rate terminal "buzz", with ICI's close to or less than 2 ms during the fi nal prey capture (Verboom and Kastelein, 2003;DeRuiter et al, 2009;Miller, 2010;Wisniewska et al, 2012).…”

Section: Acoustic Monitoringmentioning

confidence: 99%

“…Several studies have shown the utility of C-POD data to identify feeding behavior based on this acoustic parameter (Castellote et al, 2013;Nuuttila et al, 2013;Pirotta et al, 2013). Therefore, minumum ICI values for each beluga and harbor porpoise click train logged by the C-POD's in Esker Creek and Grand Wash River were analyzed to identify those containing terminal buzzes.…”

Section: Acoustic Monitoringmentioning

confidence: 99%

“…This technology has been used successfully for monitoring both belugas and harbor porpoises (Castellote et al, 2013;Wilson et al, 2013). These two species are readily distinguished by differences in frequency range and the center frequency at which each echolocates.…”

Section: Introductionmentioning

confidence: 99%

“…Beluga produce typical delphinid broad-band echolocation clicks with center frequencies between 50 kHz and 110 kHz, while harbor porpoise produce typical phocoenid nar-row-band high frequency clicks with a center frequency of 110 to 150 kHz. (Au, 1993 ;Au et al, 1999;Lammers and Castellote, 2009;Madsen et al, 2010;Castellote et al, 2013). The goals of this study were to determine the seasonal distribution of beluga and harbor porpoise in Yakutat and whether their presence in river mouths was related to its potential prey fi eld.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic monitoring and prey association for beluga whale, Delphinapterus leucas, and harbor porpoise, Phocoena phocoena, off two river mouths in Yakutat Bay, Alaska

Castellote¹,

Stafford²,

Neff³

et al. 2015

MFR

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Section: Acoustic Monitoringsupporting

confidence: 59%

Section: Acoustic Monitoringmentioning

confidence: 99%

Section: Acoustic Monitoringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acoustic monitoring and prey association for beluga whale, Delphinapterus leucas, and harbor porpoise, Phocoena phocoena, off two river mouths in Yakutat Bay, Alaska

Castellote¹,

Stafford²,

Neff³

et al. 2015

MFR

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Using passive acoustic monitoring to assess the overlap between endemic endangered Hector's dolphin (Cephalorhynchus hectori hectori) and mussel farms in the Banks Peninsula Marine Mammal Sanctuary, New Zealand

Valdés Hernández,

Dawson,

Pavanato

et al. 2024

Aquatic Conservation

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Aquaculture has maintained a sustained growth trend over the last 50 years, worldwide and in Aotearoa New Zealand. This industry is known to have environmental consequences, such as impacts on benthos, water column and higher trophic levels. Some of these impacts have been thoroughly studied, while others, such as the effects on cetaceans, are not well understood. This study used passive acoustic monitoring (PAM) to assess, for the first time, the overlap between kūtai—New Zealand greenlipped mussel (Perna canaliculus)—farms and habitat use by endemic endangered Hector's dolphins (Cephalorhynchus hectori hectori) within the Banks Peninsula Marine Mammal Sanctuary. T‐PODs were deployed in six bays, three with mussel farms and three without, between 2018 and 2019. Occurrence of dolphins, expressed as ‘dolphin positive minutes per day’ (DPM/day), was modelled using generalized linear mixed models. Results showed a strong interaction between farm (presence/absence) and season (summer/winter), with fewer acoustic detections of dolphins in winter if farms were present. Furthermore, in bays with mussel farms, there were significantly more click train detections on the opposite side of the bay, compared to the side by the mussel farm. Considering that results from this study suggest potential displacement of the dolphins due to the mussel farms, the recommendation is a precautionary approach. Further expansion of aquaculture in Hector's dolphin habitat should be done carefully, taking into account their habitat use, and conducting intensive monitoring including a robust ‘before and after’ design prior to the establishment of new farms.

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