Thus, the ANCOVA test also demonstrated significant differences during the first 20 years, the segment of lifespan that was represented in the two regions. Map Information Automatically generated Place Name coordinates. The Mediterranean region is one of the most heavily populated and developed regions of the planet. The depredation effect due to sperm whale presence was estimated within the context of the model, thus controlling for all vessel effects and spatial dependence. Results a Sperm whale data Published estimates suggest 12 sperm whales currently inhabit the Southern Ocean Whitehead Behaviour of a social unit of sperm whales Physeter macrocephlaus entangeld in a driftnet off Capo Palinuro Southern Tyrrenian Sea, Italy.
Sperm Whale Seismic Study in the Gulf of Mexico, Annual Report: Year 1
The presence of more than one animal clicking together and similar in size was not distinct. Although dolphins and killer whales differ from sperm whales in body size, longevity, prey, and behavior, we take this as supporting the investigation of potential effects of the DWH oil spill on sperm whale survival and reproduction. The southeastern Pacific Sperm Whale population, very heavily whaled during the period , has an extremely low recruitment rate probably below replacement , perhaps because of the social disruption caused by intense whaling Whitehead et al. Search site Search - this form will take you offsite. See Physeter macrocephalus Mediterranean subpopulation.
Physeter macrocephalus — Sperm Whale
Among the various body tissues, tooth dentine, which is made of proteins and hydroxyapatite, is particularly useful because it is deposited in the crown and root of the teeth during the entire life of the animal without existence of turnover [ 36 ]. They are slow-growing animals that live as long as 70 years [ 7 ] and their diet varies with sex, age and geographical region [ 8 - 10 ]. Future expansion of high-seas pelagic fisheries may result in increased interactions with Sperm Whales, including incidental catches and injury, potentially depleting local waters and leading to a decrease in area of occupancy. Listed as Vulnerable Global Status: In contrast, estimates of the pre-whaling Sperm Whale population size are about 1 individuals Whitehead Behaviour of Marine Mammals.
Journal of Cetacean Research and Management. This units remain in tropical waters close to the equator. Two sperm whales at surface Nicola Hodgins. Field Studies of Dolphins and Whales. Journal of Theoretical Biology , — The current worldwide population is not known and the conservation status of the sperm whale is listed as Vulnerable IUCN