Range Oceanic Description The sperm whale , Physeter catodon , is a large, robust, toothed whale with a massive square head equal to one-third of the body length. Total polychlorinated biphenyl PCB levels were also significantly high in all the whales, while hexachlorobenzene was the least represented compound. Maristella Giurisato, for the huge effort in storing and distributing tissue samples used for the studies included in this manuscript. By the late s conservation groups, alarmed by the continuing decline of the sperm whale, pressured government members of the International Whaling Commission IWC to greatly reduce fishing quotas for the sperm whale. Materials and Methods Our investigations on the seven sperm whales labeled from no. Several adults and pre-adults of Anisakis spp.
Sperm whales feed chiefly on squid, octopus, and cuttlefish. Hepatic and lymph node findings are shown in Fig. As generally small cetaceans with little fat reserves living in cold water, energy demands are high and consequently porpoises need to consume large amounts of food. Histopathologic and immunocytochemical studies of distemper in harbor porpoises. Males and females sexually mature when they reach lengths of 2. However, the smallest of the family is still bigger than the smallest oceanic dolphin. Evaluation of heavy metal concentrations, and in particular total mercury TotHg , Se and Cd, was performed using an atomic absorbance spectrophotometer in muscles of all the animals, and in the kidney and liver of animals no.
Blue Whale Facts for Kids. Share this Share on Twitter Share on Facebook. Pygmy killer whales are easily recognized by their round bulbous heads and their white underbellies. Generally, a pair of short grooves similar to those in beaked whales is present on the dwarf sperm whale throat. Current population estimates range from , to nearly 2 million. The whales and dolphins which live in Australia's waters are listed below.
Or they might think the blow hole functions as a radiator First at 7am, where the local surfers and beach boys herded the animal back to the deeper water. By Alessio Marrucci, open source licence Pontoporia blainvillei. Like the beluga whale, the narwhals lack dorsal fins, are chunky whales with bulbous heads and are similar in size and shape. Dwarf sperm whales are a gregarious species often found in mixed-sex groups 10 or fewer.