Mehta,A.V.
How important are baleen whales as prey for killer whales (Orcinus orca) in high-latitude waters? PhD Thesis
2004.
Abstract | BibTeX | Tags: Alaska, Antarctic, Atlantic, Australia, baleen whales, Blue whale, blue whales, Gulf of Maine, Humpback Whale, humpback whales, killer whale, killer whales, New Caledonia, New Zealand, North Atlantic, North Atlantic right whale, North Pacific, Oman, Orca, Orcinus orca, population, prey, pygmy blue whale, Pygmy blue whales, right whale, right whales, whale, whales, whaling
@phdthesis{,
title = {How important are baleen whales as prey for killer whales (Orcinus orca) in high-latitude waters?},
author = {Mehta,A.V.},
year = {2004},
date = {2004-01-01},
number = {403},
pages = {1-15},
publisher = {Boston University},
abstract = {Data on humpback whales were collected from twenty-one regions: eleven in the North Atlantic and three in the North Pacific, as well as American Samoa, Vava'u (Tonga), New Zealand, New Caledonia, western Australia, the Antarctic Peninsula, and Oman. The other species and subspecies included in this project were sampled from a single population each (Fig. 1): North Atlantic right whales, blue whales off southeastern Australia, and pygmy blue whales (Balaenoptera musculus brevicauda) off western Australia. The proportion of whales in different sampling regions bearing rake marks ranged from 0% to over 40%. The Gulf of Maine population had a scarring rate of 9.9-11%, while SW Alaska had a rate of 21.1 to 21.9%. Oman had a rate of 9.1% (3 of 33 animals). The highest rate of scarring was the "Mexico" population with a scarring rate of over 40%. Of those scarred animals with multi-year sighting histories, 82.8% to 100% had those scars the first time they were sighted. Of the total number of whales sampled from these regions, 0% to only 4.8% acquired new or additional rake marks after their first sighting, supporting the hypothesis that most whales aquire their scars as calves, and that adult baleen whales do not constitute a major prey source for killer whales.Overall, the present study suggests that the hypothesis presented by Springer et al. (2003) - that killer whales in the North Pacific were forced by industrial whaling to switch prey from baleen whales to pinnipeds and sea otters - is untenable.},
keywords = {Alaska, Antarctic, Atlantic, Australia, baleen whales, Blue whale, blue whales, Gulf of Maine, Humpback Whale, humpback whales, killer whale, killer whales, New Caledonia, New Zealand, North Atlantic, North Atlantic right whale, North Pacific, Oman, Orca, Orcinus orca, population, prey, pygmy blue whale, Pygmy blue whales, right whale, right whales, whale, whales, whaling},
pubstate = {published},
tppubtype = {phdthesis}
}
Mikhalev,Y.A.
Whaling in the Arabian Sea by the whaling fleets Slava and Sovetskaya Ukraina Book
Center for Russian Environmental Policy, Marine Mammal Council, 2000.
Abstract | BibTeX | Tags: Arabian Sea, Blue whale, blue whales, Bryde's whale, Humpback Whale, humpback whales, pygmy blue whale, Pygmy blue whales, Soviet whaling, sperm whale, sperm whales, whale, whales, whaling
@book{,
title = {Whaling in the Arabian Sea by the whaling fleets Slava and Sovetskaya Ukraina},
author = {Mikhalev,Y.A.},
year = {2000},
date = {2000-01-01},
journal = {Soviet Whaling Data [1949-1979]},
number = {156},
pages = {141-181},
publisher = {Center for Russian Environmental Policy, Marine Mammal Council},
abstract = {Thus, each of the two fleets, Slava and Sovetskaya Ukraina, operated in the Arabian Sea during three cruises. Their operations covered the period from 23 October to 15 December taking into account all the years of whaling in the Arabian Sea. In total these fleets took 1294 pygmy blue whales, 849 Bryde's whales, 242 humpback whales, and 954 sperm whales.},
keywords = {Arabian Sea, Blue whale, blue whales, Bryde's whale, Humpback Whale, humpback whales, pygmy blue whale, Pygmy blue whales, Soviet whaling, sperm whale, sperm whales, whale, whales, whaling},
pubstate = {published},
tppubtype = {book}
}
Mikhalev,Y.A.
Sperm whales of the Arabian Sea Technical Report
no. 155, 1998.
Abstract | BibTeX | Tags: Arabian Sea, baleen whale, baleen whales, Blue whale, blue whales, Bryde's whale, cetacean, Humpback Whale, humpback whales, Indian Ocean, IWC, pygmy blue whale, Pygmy blue whales, Slava, Soviet whaling, sperm whale, sperm whales, whale, whales, whaling
@techreport{,
title = {Sperm whales of the Arabian Sea},
author = {Mikhalev,Y.A.},
year = {1998},
date = {1998-01-01},
journal = {Report presented to the Scientific Committee of the Internaitonal Whaling Commission},
volume = {SC/50/CAWS40},
number = {155},
pages = {1-7},
publisher = {Internaitonal Whaling Commission},
abstract = {This article is part of the ongoing publication of materials about true whale catches by Soviet whaling fleets (Yablokov, 1994, Tormosov, 1995; Zemsky, et al, 1995, 1995a, 1996; Mikhalev 1995, 1997, 1997a). The goal of this article is to provide real quantitative characteristics, as well as size and sexual composition, of the sperm whales taken by the fleets Slava and Sovietskaya Ukraina in the Arabian Sea during the period 1963 to 1967. While the catching of baleen whales - pygmy blue whales, Bryde's whales, and humpback whales - in the northwestern Indian Ocean (Mikhalev, 1995, 1997) was absolutely prohibited and thus was a most serious violation of IWC rules, the sperm whale catches in the region had a more masked character. Harvesting of this species was not restricted to areas south of the 40øS, but rather by date and animal size. The first information about sperm whales met in this region by Soviet whalers became known through Yukhov (1969) His article reported that the stock was mixed, including both barren and lactating females as well as young males. Such detailed information about the sperm whales' stock structure should have indicated that the author's primary material was not based on visual observation, but on the results of catches. After the disintegration of the Soviet Union, cetacean research laboratories were liquidated and a portion of their primary materials disappeared. Other portions ended up distributed among various former Soviet republics, now independent states, and in private archives. Nonetheless, it was possible to recover with a high level of confidence data on the biological composition, especially the quantitative and size characteristics, of whales taken in the Arabian Sea.},
keywords = {Arabian Sea, baleen whale, baleen whales, Blue whale, blue whales, Bryde's whale, cetacean, Humpback Whale, humpback whales, Indian Ocean, IWC, pygmy blue whale, Pygmy blue whales, Slava, Soviet whaling, sperm whale, sperm whales, whale, whales, whaling},
pubstate = {published},
tppubtype = {techreport}
}
Mikhalev,Y.A.
Pygmy blue whales of the Northern-Western Indian Ocean Technical Report
no. 405, 1996.
Abstract | BibTeX | Tags: Blue whale, blue whales, Distribution, embryo growth rate, Indian Ocean, length, maturity coming, Northern-Western Indian Ocean, population, pregnancy duration, productivity, pygmy blue whale, Pygmy blue whales, whale, whales, whaling
@techreport{,
title = {Pygmy blue whales of the Northern-Western Indian Ocean},
author = {Mikhalev,Y.A.},
year = {1996},
date = {1996-01-01},
journal = {Document presented to the 48th meeting of the International Whaling Commission},
volume = {SC/48/SH30},
number = {405},
pages = {1-30},
abstract = {The biological characteristic of pygmy blue whale population of the northern-western Indian Ocean according data of whaling results of Slava for seasons 1963/66 and Sovetskaya Ukraina for seasons 1964/67 is given. During period from the end of October to the second half of December pygmy blue whales form in this region four accumulations: Aden-Oman;Pakistan-India; Lacshadweep-Maldives and Equator-Seychelles. The life of the population is provided by high feed productivity of the region. 1294 whales with length from 12.5 m to 24.0 m were taken. The mean length of males was 19.3 m; females - 19.4 m. The males tend to become mature at length 19.0 m and width of testicles 18 - 20 kg; females - at length 21.0 m. The pregnant females form 41.3% from mature ones. The rate of embryo growth is satisfactory described by monoparabola L = 5.98(t - 20.5)1.90The mean new born whale length is 5.5 - 5.6 m. The peak of two seasons of mating are at May and November, the peaks of births - at April and October. The pregnancy is 10.5 - 11.0 months long. The re productivity of pygmy blue whales are low - one new born whales per 2.5 year.},
keywords = {Blue whale, blue whales, Distribution, embryo growth rate, Indian Ocean, length, maturity coming, Northern-Western Indian Ocean, population, pregnancy duration, productivity, pygmy blue whale, Pygmy blue whales, whale, whales, whaling},
pubstate = {published},
tppubtype = {techreport}
}