886 resultados para SPERM WHALE
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"A federal/state partnership for the protection of humpback whales and their habitat."
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Publisher's advertisement: p. [1-18] at end.
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"Delivered in the House of Representatives of the United States, May 1, 1844."
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Added t.p., illus.
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Mode of access: Internet.
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In Franklin institute, Philadelphia. Journal. Philadelphia, 1829. 21 cm. v. 4, new series. p. 21-31.
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Title vignette.
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Mode of access: Internet.
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Woodcut title vignettes and illustrations.
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First edition, 1835.
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Senior thesis written for Oceanography 445
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Thesis (Ph.D.)--University of Washington, 2016-06
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Thesis (Master's)--University of Washington, 2016-06
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To investigate the incidence of non-lethal predation in Southern Hemisphere whales, more than 3400 fluke-identification photographs from resight histories of 1436 east Australian humpback whales were examined for evidence of predatory markings. Photographs were obtained from 1984 to 1996 at various locations along the east coast of Australia, from northern Queensland to southern New South Wales. Photographs were classified in terms of the level and type of scarring. The possible predator and whether the markings appeared fresh were also noted. In all, 17% of identified east Australian humpbacks possessed some form of predatory scarring, 57% of which was minor and 43% major. Almost all predatory scarring was consistent with that inflicted by killer whales. Only three whales demonstrated an increase in the level of predatory scarring after their first sightings. Two incidents of fresh scarring were recorded, and one fatal killer whale attack on a humpback whale calf was directly observed. The overall level of predatory scarring found in this study is comparable to those found in studies for Northern Hemisphere humpback whales. The low incidence of adult whales showing their first sign of predatory scarring after their initial sighting, and the small number possessing recent scarring, support the idea that east Australian humpback whales experience most predatory attacks early in life.