Dylan Walker

16 Feb Beaked Whale Resource: Summary of Threats

Species/populationWeb linkScientific nameIUCN statusGeographic locationsBycatch/entanglement/indirect or direct takesNoiseClimate changeAbundanceCommon?
Arnoux's Beaked Whalehttp://www.iucnredlist.org/details/2762/0Berardius arnuxiiData deficientAntarctica to the North Pacific, Tasman Sea, Albatross Cordillera. Strandings from New Zealand. Relatively abundant in the Cook Strait and concentrated south of New Zealand and South America.large-mesh pelagic driftnets but adoptoin of UN resolution means levels are probably low; a few were taken for scientific studysProbably outside major areas of impactcool-temperate to sub-Antarctic habitat may be affectedno estimatenot believed to be uncommon
Baird's Beaked Whalehttp://www.iucnredlist.org/details/2763/0Berardius bairdiiData deficientdeep oceanic waters of the North Pacific Ocean and the adjacent Japan, Okhotsk, and Bering Seas. Their range extends to the southern Gulf of California in the eastern Pacific, and to the island of Honshu, Japan in the western Pacific. Off the Pacific coast of Japan, they migrate into waters over the continental slope from May to October,but where they go in winter is not known.quota of 8 for the Sea of Japan, 2 for the southern Okhotsk Sea and 52 for the Pacific coasts (Kasuya 2002). Incidental catches have been recorded, but are generally not common. Although the IWC does not control the annual quota of Baird's beaked whales, it is assumed that the present catch levels over a short period would not seriously affect the subpopulation, but research is needed to obtain information that will allow a full assessment of its status.unknownunknownThree subpopulations of Baird’s beaked whales are recognized in the western North Pacific (Sea of Japan, Okhotsk Sea, and Pacific Ocean), where these whales have been exploited for centuries. There are an estimated 1,100 Baird’s beaked whales in the eastern North Pacific, including about 228 (CV=51%) off the US west coast. Abundance in Japanese waters has been estimated at about 7,000 individuals (5,029 off the Pacific coast, 1,260 in the eastern Sea of Japan, and 660 for the southern Okhotsk Sea). These are likely underestimatesnot believed to be uncommon
Indo-pacific Beaked Whalehttp://www.iucnredlist.org/details/40635/0Indopacetus pacificusData deficienttropical Pacific and Indian Oceansgillent and longline fisheries; some evidence from Sri Lanka of incidenetal takesBubble like lesions have been reported in stranded animalunknownno estimaterelatively uncommon
Sowerby's Beaked Whalehttp://www.iucnredlist.org/details/13241/0Mesoplodon bidensData deficientknown almost exclusively from the colder waters of the North Atlantic, from at least Massachusetts, USA to Labrador, Canada in the west, and from Iceland to Norway in the eastincidentally killed by whalers in Newfoundland, Iceland, and in the Barents Sea; A few entanglements in fishing gear (e.g., driftnets) have been documented but the fishery has now been closedunknownunknownno estimatenot believed to be uncommon
Andrew's Beaked Whalehttp://www.iucnredlist.org/details/13242/0Mesoplodon bowdoiniData deficientfew dozen stranding records between 32°S and 55°S; most of these have come from the South Pacific and Indian oceans (well over half are from New Zealand); verall range may be circumpolar in the Southern Hemisphere; however, there is a gap in the known distribution between the Chatham Islands, east of New Zealand and the west coast of South America.Pervasive gillnet and longline fisheries throughout the species' range raises concern that some bycatch is likely.unknownunknownno estimaterelatively uncommon species
Hubbs' Beaked Whalehttp://www.iucnredlist.org/details/13243/0Mesoplodon carlhubbsiData deficientapparently limited to the North Pacific OceanIncidental catches in drift gillnets occur sporadically off the coast of California; Whale meat products from this species are occasionally found for sale on the Japanese marketunknownunknownno estimaterelatively uncommon species
Blainville's Beaked Whalehttp://www.iucnredlist.org/details/13244/0Mesoplodon densirostrisData deficienttemperate and tropical waters of all oceansincidentally taken in the North Pacific by Taiwanese fishermen, and accidentally by Japanese tuna fishermen in the Indian Ocean; Mesoplodon densirostris have also been recorded in gillnet bycatch here in Sri Lanka - Anouk Ilangakoon.mass strandings possibly caused by sonarunknownestimates in Hawaiian waters ; Gulf of Mexico has estimates for mesoplodonts; mesoplodon estimates in eastern pacificnot believed to be uncommon
Gervais' Beaked Whalehttp://www.iucnredlist.org/details/13245/0Mesoplodon europaeusData deficientprobably continuously distributed in deep waters across the tropical and temperate Atlantic Ocean, both north and south of the equatorPervasive gillnet and longline fisheries throughout the species' range raises concern that some bycatch is likely.mass strandings possibly caused by noiseunknownestimates indicate that 106 (CV=41%) beaked whales of the genus Mesoplodon occur in the northern Gulf of Mexico, considered to be either M. densirostris or M. europaeusnot believed to be uncommon
Ginkgo-toothed Beaked Whalehttp://www.iucnredlist.org/details/13246/0Mesoplodon ginkgodensData deficienttemperate and tropical waters of the Indo-Pacific Ocean, from Sri Lanka east to the shores of North America (California) and the Galápagos Islandsoccasionally been taken by Japanese and Taiwanese whalers; some have been caught in deepwater drift gillnetsactive sonar from military vessels has been implicated in mass strandings of ginkgo-toothed beaked whalesunknownno estimaterelatively uncommon species
Gray's Beaked Whalehttp://www.iucnredlist.org/details/13247/0Mesoplodon grayiData deficientsouthern Hemisphere cool temperate species, which is apparently circum-Antarctic in occurrencePervasive gillnet and longline fisheries throughout the species' range raises concern that some bycatch is likelyunknownAs a cold water species, may be vulnerable as ocean warming may result in a shift or contraction of the species range as it tracks the occurrence of its preferred water temperaturesno estimatenot believed to be uncommon
Hector's Beaked Whalehttp://www.iucnredlist.org/details/13248/0Mesoplodon hectoriData deficientsouthern Hemisphere cool temperate species ; speculated that the species has a continuous distribution in the Atlantic and Indian oceans at least from South America to New Zealand. Although there are no current records from the central and eastern Pacific Ocean, the range may prove to be circumpolar.Pervasive gillnet and longline fisheries throughout the species' range raises concern that some bycatch is likelyunknownAs a temperate water species, may be vulnerable as ocean warming may result in a shift or contraction of the species range as it tracks the occurrence of its preferred water temperaturesno estimatemay be relatively common around New Zealand.
Strap-toothed Whalehttp://www.iucnredlist.org/details/13249/0Mesoplodon layardiiData deficientapparently have a continuous distribution in cold temperate waters of the Southern Hemisphere, mostly between 35° and 60°S; The seasonality of strandings suggests that this species may migrate. Like all beaked whales, they occur mostly in deep waters beyond the edge of the continental shelf. There is some evidence of sexual segregation in distribution.Pervasive gillnet and longline fisheries throughout the species' range raises concern that some bycatch is likely.unknownAs a cold to temperate water species, may be vulnerable as ocean warming may result in a shift or contraction of the species range as it tracks the occurrence of its preferred water temperaturesprobably not a rare species compared to its congeners
True's Beaked Whalehttp://www.iucnredlist.org/details/13250/0Mesoplodon mirusData deficientdisjunct, anti-tropical distributionEntanglement in fishing gear, especially gillnets in deep water (e.g., for billfish and tuna), is probably the most significant threat.unknownAs a temperate water species it may be vulnerable to climate change as ocean warming may result in a shift or contraction of the species range as it tracks the occurrence of its preferred water temperaturesno estimatenot believed to be uncommon
Perrin's Beaked Whalehttp://www.iucnredlist.org/details/41759/0Mesoplodon perriniData deficientsouthern and central California (between 32° and 37°N); likely endemic to the North Pacific OceanEntanglement (deep water gillnets) is probably the biggest threatunknownrestricted distributionno estimatelikely uncommon
Pygmy Beaked Whalehttp://www.iucnredlist.org/details/13251/0Mesoplodon peruvianusData deficientknown from a handful of specimens and several dozen sighting from the eastern tropical/warm temperate Pacific, including the Gulf of California; suggest that the species may be an eastern Pacific endemic. However, there is a single record of a stranding in New Zealand (Baker and Van Helden 1999), possibly suggesting that this species may have a more extensive distribution than previously believedSome pygmy beaked whales are caught incidentally in drift gillnets for sharks off Peru (Reyes et al. 1991).. Entanglement in fishing gear, especially gillnets in deep water (e.g., for billfish and tuna), is probably the most significant threat.unknownunknownFerguson and Barlow (1999) estimate a total abundance of 32,678 beaked whales in the genus Mesoplodon in the eastern Pacific (corrected for missed animals). The majority of these were Mesoplodon peruvianus and Mesoplodon densirostris (Pitman and Lynn 2001).relatively uncommon species
Stejneger's Beaked Whalehttp://www.iucnredlist.org/details/13252/0Mesoplodon stejnegeriData deficientfound in continental slope and oceanic waters of the North Pacific Basin, from southern California, north to the Bering Sea, and south to the Sea of Japan; It has been hypothesized that there may be a resident subpopulation in the Sea of Japan and southern Okhotsk SeaEntanglement in fishing gear, especially gillnets in deep water, is probably the most significant threat.unknownAs a cold water species, may be vulnerable as ocean warming may result in a contraction of the species range as it tracks the occurrence of its preferred water temperaturesno estimatenot believed to be uncommon
Spade-toothed Whalehttp://www.iucnredlist.org/details/41760/0Mesoplodon traversiiData deficientprobably a southern Hemisphere (possibly circum-Antarctic) speciesEntanglement in fishing gear, especially gillnets is probably the most significant threat.unknownpotentially limited to temperate waters, may be vulnerable as ocean warming may result in a shift or contraction of the species range as it tracks the occurrence of its preferred water temperaturesno estimaterelatively rare
Shepherd's Beaked Whalehttp://www.iucnredlist.org/details/21500/0Tasmacetus shepherdiData deficientprimarily known from a few dozen strandings, all south of 30°S, around New Zealand, southern Australia, southern South America, the Juan Fernandez Islands, and Tristan de Cunha; presumed that they have a circumpolar distribution in cold temperate waters of the Southern HemisphereNo major threats are known for this species.unknownunknownno estimaterelatively uncommon
Cuvier's Beaked Whale (Mediterranean)http://www.iucnredlist.org/details/23211/3Ziphius cavirostrisData deficientwestern and eastern basins of the Mediterraneanbycatch in drift gillnetsmass strandings from noiseunknowntwo abundance estimates for this species in small portions of the Mediterranean Seacommon; hotspots are eastern Ligurian Sea, the eastern Alborán Sea and the Hellenic Trench. The species is probably also common in several other unexplored areas.
Cuvier's Beaked Whale (Europe)http://www.iucnredlist.org/details/23211/1Ziphius cavirostrisData deficientfound in most marine waters worldwide, except for shallow water areas and very high-latitude polar regionsEntanglementmass strandings from noiseunknownabundance not estimated in european waterscommon
North Atlantic Bottlenose Whalehttp://www.iucnredlist.org/details/10707/0Hyperoodon ampullatusData Deficientfound only in the North Atlantic, from New England, USA to Baffin Island and southern Greenland in the west and from the Strait of Gibraltar to Svalbard in the eastFew incidental catches have been reportedunknownunknownrough estimate open to questions is that about 40,000 occur in the eastern North Atlantic
North Atlantic Bottlenose Whale (SARA listing)http://www.registrelep-sararegistry.gc.ca/species/speciesDetails_e.cfm?sid=162Hyperoodon ampullatusAssessed for COSEWIC by Reeves et al. (1993), and no listing was given. A subsequent report on the population that uses the waters of the Gully, a submarine canyon off the Scotian Shelf, led to this population being placed in the Special Concern category in 1996 (Whitehead et al. 1997a). Since these reports, substantial new information has been published on the Gully population, and industrial development in the area has accelerated rapidly, potentially threatening the population. Consequently, the listing of this population needs reassessment.common
Southern Bottlenose Whalehttp://www.iucnredlist.org/details/10708/0Hyperoodon planifronsLeast Concerncircumpolar distribution in the southern Hemisphere, south of about 30°Sincidentally killed in driftnets and bycatch of driftnet fishing in the Tasman Seaunknownunknown599,300 (CV=15%) beaked whales south of the Antarctic Convergence in January, most of which were considered to be southern bottlenose whalesmost common beaked whales sighted in Antarctic waters, and are clearly abundant there
Cuvier's Beaked Whale (Global)http://www.iucnredlist.org/details/23211/0Ziphius cavirostrisLeast Concernwidely distributed in offshore waters of all oceans, from the tropics to the polar regions in both hemispheres. Their range covers most marine waters of the world, with the exception of shallow water areas, and very high-latitude polar regions.Bycatch has been reported in several fisheries.mass strandings from noiseunknownGlobal trend or abundance data for this species are unavailable but abundance is at least 100,000.common