Zobrazeno 1 - 10
of 115
pro vyhledávání: '"J C, George"'
Publikováno v:
J. Cetacean Res. Manage.. 4:143-148
Since the mid-1970s, study has focused on reproductive biology of female bowhead whales, while little has been described for males. This study evaluates testicular morphology (mass and length) and histology in relation to body length to determine the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cc20e83a2a42f33c760350576ebe3f0
https://doi.org/10.47536/jcrm.v4i2.850
https://doi.org/10.47536/jcrm.v4i2.850
Publikováno v:
J. Cetacean Res. Manage.. 7:107-111
Both North Pacific populations of bowhead whales (Balaena mysticetus) underwent heavy exploitation by commercial whalers in the 19th century, but their reduction in numbers was unequal and their contemporary population sizes differ by an order of mag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2376971f1cfa8c496a592ba15a7fb74
https://doi.org/10.47536/jcrm.v7i2.743
https://doi.org/10.47536/jcrm.v7i2.743
Publikováno v:
J. Cetacean Res. Manage.. 10:99-106
The percentage of calves in a whale population can provide information on whether a population is increasing, stable or decreasing and is an input to population models. In this paper a method for estimating the percentage of calves in the Bering-Chuk
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f6fb53c966d53ea7b48b837562f25f0
https://doi.org/10.47536/jcrm.v10i2.644
https://doi.org/10.47536/jcrm.v10i2.644
Publikováno v:
J. Cetacean Res. Manage.. 11:89-99
Ice-based surveys near Point Barrow, Alaska, have been used to obtain most estimates of abundance for the Bering-Chukchi-Beaufort (B-C-B) stock of bowhead whales, but global warming has raised concerns that ice-based surveys may not be practical in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5392fa5dbd35442dcb98e5d61b57d032
https://doi.org/10.47536/jcrm.v11i2.615
https://doi.org/10.47536/jcrm.v11i2.615
Autor:
June G. Morita, J. C. George
Publikováno v:
J. Cetacean Res. Manage.. 14:15-21
An algorithm was derived for using morphometric data to classify bowhead whales into three age brackets: over 90 years (‘very old’); 60–90 years (‘old’); and under 60 (‘younger’). Recursive partitioning was applied to a subset of the da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b90db969d14876820cb1b38859f2ec54
https://doi.org/10.47536/jcrm.v14i1.519
https://doi.org/10.47536/jcrm.v14i1.519
Publikováno v:
J. Cetacean Res. Manage.. 17:9-14
Accurate determination of the ages of individual whales is key to developing effective conservation strategies for the bowhead whale (Balaena mysticetus). Previous attempts to develop reliable methods of age determination for this species have includ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e483d877a780697877021816341dc5e5
https://doi.org/10.47536/jcrm.v17i1.426
https://doi.org/10.47536/jcrm.v17i1.426
Autor:
Chris W. Clark, R. A. Charif, D. Hawthorne, A. Rahaman, G. H. Givens, J. C. George, C. A. Muirhead
Publikováno v:
J. Cetacean Res. Manage.. 19:31-42
Bowhead whales generally migrate into high Arctic waters in the summer months and move to lower latitudes in the wintertime. During the 1800s and early 1900s commercial whaling greatly reduced the numbers of bowhead whales in waters adjacent to the N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60fdd983e60f8b808c6a3769fa2dcba1
https://doi.org/10.47536/jcrm.v19i1.413
https://doi.org/10.47536/jcrm.v19i1.413
Autor:
L M, Gavazzi, L N, Cooper, S, Usip, R S, Suydam, R, StimmeLmayr, J C, George, G M, O'Corry-Crowe, Chih-Wei, Hsu, J G M, Thewissen
Publikováno v:
Journal of morphology.
Embryogenesis of cetaceans (whales, dolphins, porpoises) is well known in Stenella attenuata, the pan-tropical spotted dolphin, based on a remarkably complete and well-studied series prenatal ontogenetic stages. Our study expands understanding of cet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::16bc581701c9d5631bfe964b43fb7fd1
https://pubmed.ncbi.nlm.nih.gov/36538588
https://pubmed.ncbi.nlm.nih.gov/36538588
Publikováno v:
Canadian Journal of Zoology. 90:915-931
We used baleen lengths and age estimates from 175 whales and body lengths and age estimates from 205 whales to test which of several single- and multi-stage growth models best characterized age-specific baleen and body lengths for bowhead whales ( Ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc7b629cb0839654fb770afd80d53d64
https://doi.org/10.1139/z2012-057
https://doi.org/10.1139/z2012-057
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