Evidence for the functions of surface-active behaviors in humpback whales (Megaptera novaeangliae)

2016 ◽  
Vol 33 (1) ◽  
pp. 313-334 ◽  
Author(s):  
Ailbhe S. Kavanagh ◽  
Kylie Owen ◽  
Michael J. Williamson ◽  
Simon P. Blomberg ◽  
Michael J. Noad ◽  
...  
Keyword(s):  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Surface Active

Sex identification of humpback whales, Megaptera novaeangliae, on the wintering grounds of the Mexican Pacific Ocean

1994 ◽  
Vol 72 (10) ◽  
pp. 1771-1774 ◽  
Author(s):  
L. Medrano ◽  
M. Salinas ◽  
I. Salas ◽  
P. Ladrón de Guevara ◽  
A. Aguayo ◽  
...  
Keyword(s):  
Skin Biopsy ◽  
Agonistic Behavior ◽  
Pacific Coast ◽  
Sex Identification ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Sampling Effort ◽  
Mexican Pacific ◽  
Competitive Activity ◽  
Surface Active

The sex of 43 humpback whales (Megaptera novaeangliae) from different social groupings in the Mexican Pacific was identified by a molecular analysis of skin biopsy samples. Of the 18 whales sampled from surface-active groups, 17 were males. Three singers were sampled and identified as males. In two cases, whales interrupting and joining a singer without exhibiting agonistic behavior were identified as females. A higher proportion of males was found in the samples collected at the Revillagigedo Islands, reflecting a greater sampling effort on surface-active groups. Preliminary data showed that along the Mexican Pacific coast, the migratory arrival of males corresponds closely to the timing of competitive activity.

Population composition of humpback whales, Megaptera novaeangliae, on Silver Bank, 1984

1989 ◽  
Vol 67 (2) ◽  
pp. 281-285 ◽  
Author(s):  
David K. Mattila ◽  
Phillip J. Clapham ◽  
Steven K. Katona ◽  
Gregory S. Stone
Keyword(s):  
North Atlantic ◽  
High Latitude ◽  
Gulf Of Maine ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Breeding Ecology ◽  
Population Composition ◽  
Winter Range ◽  
The North ◽  
Surface Active

Between 14 February and 19 March 1984, 19 d were spent observing humpback whales, Megaptera novaeangliae, on Silver Bank. In total, 317 whales were individually identified from photographs of ventral fluke patterns. Comparison of these photographs with the North Atlantic humpback whale catalogue revealed that 97 of the whales had previously been observed in other areas. Matches were made with all of the major known high-latitude feeding grounds: Greenland (6), Newfoundland – Labrador (43), the Gulf of St. Lawrence (7), and the Gulf of Maine (12). Matches were also made with habitats in the winter range of this population: Bermuda (1), Silver Bank in other years (26), Puerto Rico (18), Virgin Bank (1), and Anguilla Bank (1). Analysis of matches suggests that whales from the various high-latitude feeding stocks mix randomly on Silver Bank. Seven surface-active groups contained whales from different high-latitude feeding stocks, providing the strongest evidence to date for genetic mixing among these stocks. The behavior and composition of surface-active groups are discussed. Overall, the number of whales, calves, and surface-active groups observed during this study confirms the apparently singular importance of Silver Bank to the breeding ecology of western North Atlantic humpback whales.

Steroid hormone profiles and body conditions of migrating male humpback whales (Megaptera novaeangliae)

2021 ◽  
Vol 313 ◽  
pp. 113888
Author(s):  
Greta Dalle Luche ◽  
Ashley S.P. Boggs ◽  
John R. Kucklick ◽  
Darryl W. Hawker ◽  
Jillian H. Wisse ◽  
...  
Keyword(s):  
Steroid Hormone ◽  
Megaptera Novaeangliae ◽  
Humpback Whales

Between-year synchrony in migratory timing of individual humpback whales,Megaptera novaeangliae

2012 ◽  
Vol 29 (1) ◽  
pp. 228-235 ◽  
Author(s):  
Daniel Burns ◽  
Lyndon Brooks ◽  
Phil Clapham ◽  
Peter Harrison
Keyword(s):  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Migratory Timing

scholarly journals Behavior of humpback whales, Megaptera novaeangliae (Cetacea: Balaenopteridae): comparisons between two coastal areas of Brazil

2008 ◽  
Vol 25 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Diana G. Lunardi ◽  
Márcia H. Engel ◽  
Regina H. F. Macedo
Keyword(s):  
Group Composition ◽  
Coastal Areas ◽  
Reproductive Period ◽  
The State ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Behavior Patterns ◽  
Northern Coast ◽  
Behavioral Differences

Behavior of humpback whales was observed during the reproductive period off the northern coast of the state of Bahia (NB, n = 378 groups) and at the Abrolhos Bank (AB, n = 919) to compare patterns and group composition between the two locations. Alone individuals and dyads were most often encountered in both areas, although mother-calf pairs were more common in AB. While these two regions comprise distinct concentrations of humpback whales, with intrinsic environmental differences, behavior patterns were quite similar. The only behavioral differences found where for "tail up" and "resting". The patterns found here may reflect differences in the protection status of the areas or intrinsic environmental differences.

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