First live sighting of Deraniyagala's beaked whale (<i>Mesoplodon hotaula</i>) or ginkgo‐toothed beaked whale (<i>Mesoplodon ginkgodens</i>) in the western Pacific (South China Sea) with preliminary data on coloration, natural markings, and surfacing patterns

Rosso, Massimiliano; Lin, Mingli; Caruso, Francesco; Liu, Mingming; Dong, Lijun; Borroni, Anna; Lin, Wenzhi; Tang, Xiaoming; Bocconcelli, Alessandro

doi:10.1111/1749-4877.12507

Cited by 14 publications

(15 citation statements)

References 31 publications

(73 reference statements)

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“…Although the observed animals may exhibit a geographic variation of the color patterns of ginkgo‐toothed or Deraniyagala's beaked whales and we cannot rule out either species, their external features do not match any published descriptions of these species. Superficially, the whales we saw closely resemble a group of Mesoplodon beaked whales (described as either M. ginkgodens or M. hotaula ) photographed recently in the South China Sea (Rosso et al, 2020) but differ in the shape of the cheek patch and the presence of dark pigmentation below the tooth in the male.…”

Section: Figuresupporting

confidence: 56%

Unique morphological and acoustic characteristics of beaked whales (Mesoplodon sp.) off the west coast of Baja California, Mexico

Barlow

Cárdenas-Hinojosa

Henderson

et al. 2021

Marine Mammal Science

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Three new species of beaked whales (Ziphiidae) have been described in the past three decades: the pygmy beaked whale (Mesoplodon peruvianus; Reyes et al. 1991), Perrin's beaked whale (Mesoplodon perrini;Dalebout et al. 2002), and Sato's beaked whale (Berardius minimus; Yamada et al. 2019). Perrin's beaked whale has never been identified alive and was discovered accidentally through genetic analysis of stranded whales in California that had been misidentified as Hector's beaked whale (Mesoplodon hectori; Dalebout et al. 2002). However, before they were formally described, field naturalists had identified the pygmy beaked whale as a new species and given it the interim name Mesoplodon sp. A (Pitman et al., 1987;Pitman & Lynn, 2001). Sato's beaked whale was known to whalers and given the colloquial name kuro-tsuchi or black Baird's beaked whale before its existence was known to science. Based on this recent history, more beaked whale species may be awaiting discovery and are likely to be recognized in the field before they are formally described. Here we present photographic and acoustic features of an unidentified Mesoplodon seen off the west coast of Baja California, Mexico, that are distinct from any of the mesoplodonts known to regularly occur in the northeast Pacific. These observations may therefore represent the first record of a new taxa.

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Section: Figuresupporting

confidence: 56%

Unique morphological and acoustic characteristics of beaked whales (Mesoplodon sp.) off the west coast of Baja California, Mexico

Barlow

Cárdenas-Hinojosa

Henderson

et al. 2021

Marine Mammal Science

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show abstract

“…The sperm whale ( Physeter macrocephalus ) was encountered twice (10 individuals), whereas Risso's dolphins ( Grampus griseus , 12 individuals), Cuvier's beaked whales ( Ziphius cavirostris , 2 individuals), and an unidentified beaked whale (either the ginkgo‐toothed beaked whale, Mesoplodon ginkgodens , or Deraniyagala's beaked whale, Mesoplodon hotaula ; identification details see Rosso et al . 2020) were recorded only once each. The species accumulation curves, which did not reach an asymptote, are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A pioneering survey of deep‐diving and off‐shore cetaceans in the northern South China Sea

et al. 2020

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A pioneering boat-based survey was conducted in 2019, to gather baseline information regarding the presence, composition, relative abundance, and spatial distribution of deep-diving and off-shore cetaceans in the northern South China Sea (SCS). A total of 27 sightings comprising at least 8 cetacean species were recorded during the 13-day survey, including 5 deep-diving species (i.e. Risso's dolphin [Grampus griseus], short-finned pilot whale [Globicephala macrorhynchus], sperm whale [Physeter macrocephalus], Cuvier's beaked whale [Ziphius cavirostris], and an unidentified beaked whale [either the ginkgo-toothed beaked whale, Mesoplodon ginkgodens, or Deraniyagala's beaked whale, Mesoplodon hotaula]), as well as 3 off-shore dolphins (i.e. pantropical spotted dolphin [Stenella attenuate], striped dolphin [Stenella coeruleoalba], and Fraser's dolphin [Lagenodelphis hosei]).With the exception of pantropical spotted dolphins, all other species were sighted and recorded at sea in the northern SCS for the first time. The pantropical spotted dolphin was the most frequently sighted species, comprising 30% of the total sightings. Deep-diving cetaceans were mainly sighted in the northern Xisha Archipelago, whereas off-shore dolphins were distributed across the survey area. The pantropical spotted dolphin was observed in aggregations of more than 100 individuals and nearly all encountered species included calves; these findings suggested that the survey area functions as an important feeding and calving ground for various cetacean species. This pioneering survey provides fundamental information regarding cetacean fauna in the northern SCS and highlights the need to strengthen research and conservation efforts concerning these species.

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“…Of the 8 encountered species, 7 were recorded at sea in the northern South China Sea for the first time. Through using photographic data, Rosso et al (2021) identified a group of mysterious beaked whales from the field survey depicted by Lin et al (2021a). Photographic evidences showed that the mysterious beaked whales are either ginkgo-toothed or Deraniyagala's beaked whales (Mesoplodon ginkgodens or M. hotaula).…”

Section: Multiple-species Field Surveysmentioning

confidence: 99%

“…Through using photographic data, Rosso et al . (2021) identified a group of mysterious beaked whales from the field survey depicted by Lin et al . (2021a).…”

Section: Ecology and Behaviormentioning

confidence: 99%

Research on whales, dolphins, and porpoises

Liu

2021

Integr. Zool.

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First live sighting of Deraniyagala's beaked whale (Mesoplodon hotaula) or ginkgo‐toothed beaked whale (Mesoplodon ginkgodens) in the western Pacific (South China Sea) with preliminary data on coloration, natural markings, and surfacing patterns

Cited by 14 publications

References 31 publications

Unique morphological and acoustic characteristics of beaked whales (Mesoplodon sp.) off the west coast of Baja California, Mexico

Unique morphological and acoustic characteristics of beaked whales (Mesoplodon sp.) off the west coast of Baja California, Mexico

A pioneering survey of deep‐diving and off‐shore cetaceans in the northern South China Sea

Research on whales, dolphins, and porpoises

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