Whale watching is the practice of observing whales and dolphins (cetaceans) in their natural habitat. Whale watching is mostly a recreational activity (cf. birdwatching), but it can also serve scientific and/or educational purposes. A study prepared for International Fund for Animal Welfare in 2009 estimated that 13 million people went whale watching globally in 2008. Whale watching generates 2.1billionperannumintourismrevenueworldwide,employingaround13,000workers.Thesizeandrapidgrowthoftheindustryhasledtocomplexandcontinuingdebateswiththewhalingindustryaboutthebestuseofwhalesasanaturalresource.OrganizedwhalewatchingstartedintheUnitedStates,whentheCabrilloNationalMonumentinSanDiegowasdeclaredapublicvenueforobservingthemigrationofgraywhales;thespectacleattracted10,000visitorsinitsfirstyear,1950.In1955thefirstwater−basedwhalewatchingcommencedinthesamearea,chargingcustomers1 per trip to view the whales at closer quarters. The industry spread throughout the western coast of the United States over the following decade.
In 1971 the Montreal Zoological Society commenced the first commercial whale watching activity on the eastern side of North America, offering trips in the St. Lawrence River to view fin and beluga whales. By the mid-1970s, live captures for aquaria had reduced the orca populations in the coastal waters of British Columbia and Washington, particularly the southern resident orca population. According to their scientific chroniclers, in the 1980s commercial whale watching started becoming an alternative means of viewing and appreciating orcas. In 1984, Erich Hoyt, who had spent much time amongst the orcas of British Columbia, published the first comprehensive book on whale watching, The Whale Watcher's Handbook, which Mark Carwardine called his number one "natural classic" book in BBC Wildlife magazine.
By 1985 more visitors watched whales from New England than California.
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The sperm whale or cachalot (Physeter macrocephalus) is the largest of the toothed whales and the largest toothed predator. It is the only living member of the genus Physeter and one of three extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding. Females and young males live together in groups, while mature males (bulls) live solitary lives outside of the mating season.
The humpback whale (Megaptera novaeangliae) is a species of baleen whale. It is a rorqual (a member of the family Balaenopteridae) and is the only species in the genus Megaptera. Adults range in length from and weigh up to . The humpback has a distinctive body shape, with long pectoral fins and tubercles on its head. It is known for breaching and other distinctive surface behaviors, making it popular with whale watchers. Males produce a complex song typically lasting 4 to 33 minutes.
Cetacean surfacing behaviour is a grouping of movement types that cetaceans make at the water's surface in addition to breathing. Cetaceans have developed and use surface behaviours for many functions such as display, feeding and communication. All regularly observed members of the order Cetacea, including whales, dolphins and porpoises, show a range of surfacing behaviours. Cetacea is usually split into two suborders, Odontoceti and Mysticeti, based on the presence of teeth or baleen plates in adults respectively.
Explainable machine learning and uncertainty quantification have emerged as promising approaches to check the suitability and understand the decision process of a data-driven model, to learn new insights from data, but also to get more information about th ...
Humpback whales, like other polar wildlife, accumulate persistent organic pollutants. In Southern hemisphere populations, hexachlorobenzene (HCB) dominates the contaminant profiles. HCB is linked to a variety of health effects and is classified as a group ...
ROYAL SOC CHEMISTRY2019
This paper reports the first successful derivation and characterization of humpback whale fibroblast cell lines. Primary fibroblasts were isolated from the dermal connective tissue of skin biopsies, cultured at 37 degrees C and 5% CO2 in the standard mamma ...