Berardius arnuxii Duvernoy 1851

• Main Authors: Russell A. Mittermeier, Don E. Wilson
• Format: Other/Unknown Material
• Language: unknown
• Published: Lynx Edicions 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Mammalia; Cetacea; Hyperoodontidae; Berardius; Berardius arnuxii; Antarctic; New Zealand; Baleine; The Beak; Antarc*; Antarctica
• Online Access: https://zenodo.org/record/6608497; https://doi.org/10.5281/zenodo.6608497

2. Arnoux’s Beaked Whale Berardius arnuxii French: Baleine-a-bec dArnoux / German: Arnoux-Schnabelwal / Spanish: Zifio de Arnoux Other common names: New Zealand Beaked Whale, Southern Fourtoothed Whale Taxonomy. Berardius arnuxi Duvernoy, 1851, “échoué sur la cote, dans le port d’Akaroa, presqu’ile de Bancks, dans la Nouvelle-Zélande” (= New Zealand, Canterbury Prov., Akaroa). This species is monotypic. Distribution. Subantarctic and Antarctic waters from Antarctica to South Africa, S Australia, N New Zealand, and South America. Descriptive notes. Total length 800- 930 cm; weight ¢.9000 kg. There is no clear evidence of sexual dimorphism in body size of Arnoux’s Beaked Whale. Its bodyis spindle-shaped, with greatest girth around its midpoint. Flukes are wide in relation to body length, and tailstock is compressed laterally. Dorsal fin is small and set approximately two-thirds the distance between tip of the beak and end ofthe tail. Coloration is typically dark brown, dark gray, or black. Bodies of some individuals, especially older ones, can be covered in white linear scars from intraspecific aggression or pale oval scars from attacks by cookie-cutter sharks (/sistius spp.). Rostrum and lowerjaw form a moderately long beak that is clearly distinct from the melon. Adults have two pairs oftusks set in the lowerjaw; front pair is larger. Unlike many other species of beaked whales, tusks erupt in adults to become functional in both males and females. Tusks of Arnoux’s Beaked Whales can become heavily worn in older individuals. Habitat. There is no specific information available for this species, but like all species of beaked whales, Arnoux’s Beaked Whaleis restricted to deeper oceanic waters. Food and Feeding. Little is known about the diet of Arnoux’s Beaked Whale, but they are known to consume deep-water squid and possibly deep-water fish. In common with otherspecies of beaked whales, feeding is likely to occur at great depth, often greater than 500 m and possibly as deep as 3000 m or more. Foraging dives may be ...