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A NEW BIRTH-INTERVAL APPROACH TO ESTIMATING DEMOGRAPHIC PARAMETERS OF HUMPBACK WHALES
- J. Barlow, P. Clapham
- Environmental Science
- 1 March 1997
A demographic model is developed based on interbirth intervals and is applied to estimate the population growth rate of humpback whales in the Gulf of Maine, and female survival rates are estimated from these same sighting data using a modified Jolly–Seber method.
The social and reproductive biology of Humpback Whales: an ecological perspective
- P. Clapham
- Environmental Science
- 1 March 1996
The widespread distribution of females resulting from absence of both predation and resources during the breeding season preclude simultaneous monopolization by males of more than one potential mate, and these factors, together with a male-biased operational sex ratio, minimize the possibility of competition among females.
Baleen Whales: Conservation Issues and The Status Of The Most Endangered Populations
- P. Clapham, S. Young, R. Brownell
- Environmental Science
- 1 March 1999
Current data suggest that, of the various threats potentially affecting baleen whales, only entanglement in fishing gear and ship strikes may be significant at the population level, and then only in those populations which are already at critically low abundance.
FISHING GEAR INVOLVED IN ENTANGLEMENTS OF RIGHT AND HUMPBACK WHALES
- Amanda Johnson, G. Salvador, P. Clapham
- Environmental Science
- 1 October 2005
When identified, the gear types and parts involved in lethal cases were not substantially different from entanglements with non-lethal outcomes; however, a wide range of specific gear types were implicated.
AN OCEAN-BASIN-WIDE MARK-RECAPTURE STUDY OF THE NORTH ATLANTIC HUMPBACK WHALE (MEGAPTERA NOVAEANGLIAE)
- Tim D. Smith, Judith Allen, N. Øien
- Environmental Science
- 1999
Although much is known about the humpback whale, Megaptera novaeangliae, regional studies have been unable to answer several questions that are central to the conservation and management of this…
Genetic tagging of humpback whales
- P. Palsbøll, Judith Allen, N. Øien
- Environmental ScienceNature
- 21 August 1997
This study demonstrates that genetic tagging is not only feasible, but generates data that can be valuable when interpreting the results of tagging experiments, and allows the first estimates of animal abundance based solely on genotypic data.
Distribution of mtDNA haplotypes in North-Atlantic humpback whales: The influence of behavior on population structure
- P. Palsbøll, P. Clapham, P. Arctander
- Biology
- 12 January 1995
The combined results from the homogeneity tests and the genealogical tree indicate that behaviour (in this case maternally directed site fidelity to a foraging area) can influence the population structure of marine cetaceans on an evolutionary time scale.
Composition and Dynamics of Humpback Whale Competitive Groups in the West Indies
- P. Clapham, P. Palsbøll, D. Mattila, O. Vásquez
- Psychology
- 1992
It is suggested that competitive groups may be asymmetrical contests in which a female Nuclear Animal is of more value to the Principal Escort than to a Challenger, particularly if the former's defence of her represents mate-guarding.
Assessing plausible rates of population growth in humpback whales from life-history data
- A. Zerbini, P. Clapham, P. Wade
- Environmental Science
- 24 February 2010
Recent data on life-history parameters influencing rates of population growth in humpback whales, including survival, age at first parturition and calving rate are reviewed and Monte Carlo simulations are used to compute a distribution of rates of increase (ROIs) taking into account uncertainty in biological parameter estimates.
Conservation status of North Pacific right whales
- R. Brownell, P. Clapham, T. Kasuya
- Physics
- 22 October 2020
A corona cartridge for charging a photoreceptor in high-speed electrophotographic applications may include a comb-like corona charging device electronically connected to operate with the…
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