These authors suggest that the spiral format of these rings is related to evolutionary issues in the different species of odontocete
cetaceans, such as an adaptation to withstand pressure while diving.
During the HICEAS in 2002, 23 cetacean species (18 odontocetes
and 5 mysticetes) were encountered, and the abundance of 19 species (18 odontocetes
and 1 mysticete) was estimated (Barlow, 2006).
Sounds below 1 kHz (typical of mysticete calls) have significantly less seawater absorption loss than sounds above 10 kHz (typical of odontocete
calls) and thus can be detected at greater distances (Mellinger et al.
It has been suggested for a few interspecific observations among odontocetes
involving aggression and pieces of squid /flesh in nearby waters; for example, False Killer Whale (Pseurdorca crassidens) and Short-finned Pilot Whale (Globicephala macrorhynchus) harassment of Sperm Whales (Palacios and Mate 1996; Weller and others 1996).
A preliminary report on the incidental entrapment of odontocetes
by Sri Lanka's coastal drift net fishery.
2000: The world's oldest known odontocete
The ecology of lobomycosis in humans and odontocetes
seems to be unconnected.
Mysticeti and odontocetes
have also shown changes in behavior and vocalization patters such as disruption of foraging, avoidance of particular areas, altered dive and respiratory patterns, and disruption of mating systems (Gordon et al.
Among marine mammals, odontocetes
(toothed whales), including beluga, may be at the greatest risk of contaminant effects because these animals are top predators that accumulate contaminants to a higher degree than do mysticetes (baleen whales) (O'Shea and Brownell 1994).
were represented by four families Ziphiidae, Kogiidae, Physeteridae and Delphinidae.
(members of the group Odontoceti), commonly known as toothed whales, are characterized by the presence of teeth in their mouths.
Troisieme partie: les Odontocetes
Cetacea, Mammalia du Miocene.
Taxonomists divide living whales and dolphins into two suborders: the Odontocetes
, which have teeth, and the Mysticeres, whose mouths have banks of comb-like baleen used to filter small fish and crustaceans from the water.
australis, Frequency of Ocurrence FO: 40%) and a set of odontocetes
(FO: 9%): pilot whale (Globicephala melas FO: 3.
In addition, odontocetes
(toothed whales and dolphins) use echolocation for foraging and navigation.