Berardius

Berardius

 

a genus of whales of the family Ziphiidae. Two pairs of flattened teeth are present in the lower jaw. The whales live in schools and feed on cephalopod mollusks. Feeding involves deep and prolonged dives. There are two species: Baird’s whale (B. bairdi) and B. arnouxi. Female Baird’s whales reach a length of 12.5 m, and males 11 m. Baird’s whales live in the North Pacific, including the Sea of Japan, the Sea of Okhotsk, and the Bering Sea. B. arnouxi, which measures up to 11 m long, is found in the southern hemisphere to the antarctic. Japan is the only country that hunts the two species commercially.

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Los rumores de pescadores japoneses sobre la existencia de una ballena diferente a las conocidas resultaron ciertos; una nueva especie del cetaceo Berardius minimus fue descubierta en las costas de la isla de Hokkaido por un grupo de cientificos.
bairdii (la ballena picuda de Baird) y fueron clasificadas como pertenecientes al mismo genero Berardius", indico el texto.
cavirostris, but has been reported in the diet of Baird's Beaked Whale (Berardius bairdii) at similar latitude in the western Pacific off Honshu, Japan and in the boreal southern Sea of Okhotsk (Walker and others 2002).
Diets of Baird's Beaked Whales, Berardius bairdii, in the southern Sea Of Okhotsk and off the Pacific coast of Honshu, Japan.
There were only 6 sightings of beaked whales, but all 3 genera (Ziphius, Berardius, and Mesoplodon) known to be present off Southern California were detected.
Las mas importantes son: Ballena boba, (Balaenoptera borealis), Ballena azul (Balaenoptera musculus), Ballena de aleta (Balaenoptera physalus), Ballena de esperma (Physter macrocephalus), Ballena franca (Eubalaena australis), Orca (Orcinus orca), Delfin pintado (Stenella attenuatta), Delfin listado (Stenella coeruleoalba), Delfin tornillon (Stenella longirostris), Ballena de pico de Arnoux (Berardius arnouxii).
Take reduction plans currently are in effect for the harbor porpoise, Phocoena phocoena, in the Mid Atlantic and Gulf of Maine regions; large whales (Eubalaena glacialis, Megaptera novaenangliae, and Balaenoptera physalis) in the Atlantic; and the pilot whale, Globicephala macrorhynchus; pygmy sperm whale, Kogia breviceps; sperm whale, Physeter macrocephalus; humpback whale, Megaptera novaeanliae; and beaked whales (Berardius bairdii, Mesoplodon spp., Ziphius cavirostris) in the Pacific.
The absence of California sightings for two beaked whale genera (Mesoplodon and Berardius, Table 7) since 1996 is disconcerting, especially in light of recent discoveries about the susceptibility of this group to loud anthropogenic sounds (Simmonds and Lopez-Jurado, 1991; Cox et al., 2006); however, weather conditions were less favorable for the detection of beaked whales during the more recent surveys (Fig.
Julian and Beeson (1998) reported a total of 20 Cuvier's beaked whales, Ziphius cavirostris; one Baird's beaked whale, Berardius bairdii; one Stegneger's beaked whale, Mesoplodon stegnegerii; five Hubb's beaked whales, Mesoplodon hubbsi; two unidentified mesoplodont beaked whales, Mesoplodon sp.; and three unidentified beaked whales observed killed in this fishery between the years 1990 and 1995.
longirostris (4%) (Dizon et al, 1991), between Mesoplodon, Berardius and Hyperoodon (4.7%) (Dalebout et al., 1998), between Tursiops truncatus and T.
Less frequently observed species were minke whales (Baleanoptera acutorostrata; 42 sightings), fin whales (Baleanoptera physalus; 15 sightings), sperm whales (Physeter macrocephalus; 7 sightings), and Bairds beaked whales (Berardius bairdii; 10 sightings).
In odontocete males, these characteristics are present in the form of "weapons," such as the tusk of the narwhal (Monodon monoceros) and the teeth in species of the genus Grampus, Physeter, Berardius, Hyperoodon, and Mesoplodon used in male-male combats (MacLeod, 1998).