Long‐distance movements of North Atlantic killer whales (<scp><i>Orcinus orca</i></scp>) from Iceland via Spain and Italy to Lebanon

Mrusczok, Marie-Thérèse; Violi, Biagio; Fakhri, Milad; Calogero, Giulia; Biasissi, Elia; Jaouhar, Ali; Scullion, Andrew; Würtz, Maurizio

doi:10.1111/mms.12866

Cited by 6 publications

(8 citation statements)

References 14 publications

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“…A disadvantage of the real-time acoustic monitoring systems is that they are generally fixed at a specific location, so they are not suitable for exceptional animal sightings in unusual areas, such as the stay of a pod of killer whales (Orcinus orca) in the port of Genova Prà in December 2019 [38,39]. In this case, it is more efficient to use mobile systems that allow real-time measurements for a limited time (towed hydrophones and wave gliders) or those that do not allow real-time monitoring (bottom recorders).…”

Section: Discussionmentioning

confidence: 99%

Real-Time Continuous Acoustic Monitoring of Marine Mammals in the Mediterranean Sea

Sanguineti

Guidi

Kulikovskiy

et al. 2021

JMSE

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The passive acoustic monitoring of cetaceans is a research method that can provide unique information on the animal’s behaviour since the animals can be studied at great depths and at a long-range without interference. Nevertheless, the real-time data collection, transfer, and analysis using these techniques are difficult to implement and maintain. In this paper, a review of several experiments that have used this approach will be provided. The first class of detectors consists of hydrophone systems housed under buoys on the sea surface with wireless data transmission, while the second type comprises several acoustic detector networks integrated within submarine neutrino telescopes cabled to the shore.

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Section: Discussionmentioning

confidence: 99%

Real-Time Continuous Acoustic Monitoring of Marine Mammals in the Mediterranean Sea

Sanguineti

Guidi

Kulikovskiy

et al. 2021

JMSE

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“…This might indicate that both ours and the Icelandic catalogs contained sound types from pods having related matrilines. Since it is known that the analyzed pod originated in Iceland (Mrusczok et al, 2021), we would expect to find up to 11 sound types forming our pod repertoire in the Icelandic catalog. Ford (1991) observed that most calls in a pod repertoire can be heard during 10-20 min of vocal activity.…”

Section: Visual and Aural Analysismentioning

confidence: 99%

“…As this location is very unusual for orca presence—the previous observations date back to the 1980s—this represented a special opportunity for a long‐term passive acoustic recording of an isolated orca pod in natural conditions. The pod consisted of a total of four individuals that were recognized through photo identification (Mrusczok et al, 2021) and one calf. In particular, Riptide (SN113), an adult male, Aquamarin (SN116), a juvenile, Dropi (SN115), whose sex was not identified, and Zena (SN114), an adult female who lost her calf during data collection.…”

Section: Introductionmentioning

confidence: 99%

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Towards automatic detection and classification of orca (Orcinus orca) calls using cross‐correlation methods

Palmero

Guidi

Kulikovskiy

et al. 2022

Marine Mammal Science

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Orcas (Orcinus orca) are known for complex vocalization. Their social structure consists of pods with unique call repertoires and clans sharing vocal traditions. Call repertoires are typically established visually and aurally and are used for pod identification. Automatic tools are, however, more suited for large data sets. An Icelandic orca pod occurring in 2019 in the Ligurian Sea provided a unique occasion for collecting recordings of an isolated pod in natural conditions.Recordings were analyzed visually and aurally to create a pod catalog. The R package "warbleR" was used for the first time on a small subsample of orca data to automatically detect sound samples and classify sound types. We found cross-correlation methods with the Pearson correlation coefficient (PCC) to successfully classify sound types, though false positives occur. We compared our catalog to Icelandic and Antarctic ones checking for similarities and dissimilarities. We found five matches in the Icelandic catalog, two of which had high PCCs ranges (0.62-0.67; 0.60-0.65). Our automatic approach was limited by background noise and variability of orca vocalizations, and it was computationally demanding. We show cross-correlation

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“…Epimeletic behavior of killer whales toward conspecifics has previously been documented on several occasions (Reggente et al 2016;Bearzi et al 2018;Shedd et al 2020). A female killer whale from the Icelandic population has previously been observed displaying epimeletic behavior toward her dying (and later dead) calf for five consecutive days, with the female carrying the killer whale calf on the rostrum (Mrusczok et al 2022). Epimeletic behavior of killer whales toward non-conspecifics has not been previously documented.…”

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confidence: 99%

First account of apparent alloparental care of a long-finned pilot whale calf (Globicephala melas) by a female killer whale (Orcinus orca)

et al. 2023

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Interactions between killer whales ( Orcinus orca (Linnaeus, 1758)) and long-finned pilot whales ( Globicephala melas (Traill, 1809)) have been documented on numerous occasions, usually involving predation events and pursuits. Here, the first documented account of a long-finned pilot whale calf seen in echelon position with one killer whale in a group of three killer whales is described, along with one further interaction of the same killer whale group with other long-finned pilot whales. Behavioral, locational, and photographic data were recorded and analyzed for killer whales between 2011 and 2022 and for long-finned pilot whales between 2019 and 2022 off West Iceland. The data were used to obtain background information on the killer whale group involved in the apparent alloparental behavior. The described event also presents the first documented account of epimeletic behavior of a killer whale toward a non-conspecific. The movements of the same killer whale group in conjunction with other killer whales during a subsequent interaction with a group of long-finned pilot whales do not fit any previously observed behavioral patterns described for interactions between these species and may represent an active effort to obtain another long-finned pilot whale calf. Long-finned pilot whale and killer whale interactions might be more complex than previously thought and influenced by multiple drivers.

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Long‐distance movements of North Atlantic killer whales (Orcinus orca) from Iceland via Spain and Italy to Lebanon

Cited by 6 publications

References 14 publications

Real-Time Continuous Acoustic Monitoring of Marine Mammals in the Mediterranean Sea

Real-Time Continuous Acoustic Monitoring of Marine Mammals in the Mediterranean Sea

Towards automatic detection and classification of orca (Orcinus orca) calls using cross‐correlation methods

First account of apparent alloparental care of a long-finned pilot whale calf (Globicephala melas) by a female killer whale (Orcinus orca)

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