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Browsing by Author "Best, Peter B"

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The abundance of blue whales on the Madagascar Plateau, December 1996

Author: Best, Peter B ; Rademeyer, Rebecca A ; Burton, Chris ; Ljungblad, Don ; Sekiguchi, Keiko ; Shimada, Hiroyuki ; Thiele, Deborah ; Reeb, Desray ; Butterworth, Doug S Date: 2003 As part of the International Whaling Commission’s SOWER blue whale research programme, two sighting vessels, the Shonan Maru and the Shonan Maru No.2 , surveyed the Madagascar Plateau between 25° and 35°S, 40° and 45°E, in December 1996. A ... Read more
Application of a photo-identification based assessment model to southern right whales in South African waters

Author: Brandão, Anabela ; Butterworth, Doug S ; Müller, Andrea ; Best, Peter B Date: 2012 The three-mature-stages (receptive, calving and resting) model of Cooke et al. (2003) is applied to photo-identification data available from 1979 to 2010 for southern right whales in South African waters. The 2010 number of females having ... Read more
Application of a photo-identification based assessment model to southern right whales in South African waters, now including data up to 2012

Author: Brandão, Anabela ; Butterworth, Doug S ; Ross-Gillespie, Andrea ; Best, Peter B Date: 2013 This paper extends the analyses of Brandão et al. (2012) which applied the three-mature-stages (receptive, calving and resting) model of Cooke et al. (2003) to photo-identification data available from 1979 to 2010 for southern right whales ... Read more
Biopsying Southern right whales: their reactions and effects on reproduction

Author: Best, Peter B ; Reeb, Desray ; Rew, Mary Beth ; Palsbøll, Per J ; Schaeff, Cathy ; Brandão, Anabela Date: 2005 Collecting skin biopsies from large whales for genetic analysis is often subject to national permit, and in the case of cow-calf pairs, it may be prohibited. We present results of 906 biopsy attempts on southern right whales (Eubalaenaustralis) ... Read more
Estimates of demographic parameters for southern right whales off South Africa from survey data from 1979 to 2006

Author: Brandão, Anabela ; Best, Peter B ; Butterworth, Doug S Date: 2010 Aerial counts of right whale cow-calf pairs on the south coast of South Africa between 1971 and 2006 indicate an annual instantaneous population increase rate of 0.069 a year (95% CI 0.064, 0.074). Annual photographic surveys since 1979 have ... Read more
Estimating the abundance of common dolphins on the southern coast of South Africa

Author: Best, Peter B ; Meyer, Michael A ; de Decker, Michelle ; Müller, Andrea ; Sekiguchi, Keiko Date: 2009 Sightings made on an aerial survey in December 1982 and on a ship-based survey in January/February 1983 have been used to assess the size of the population of common dolphins (Delphinus capensis) occurring over the continental shelf south of ... Read more
Geographical variation in the body size of adult female sperm whales (Physeter macrocephalus) – an example of McNab’s resource rule?

Author: Best, Peter B ; Tormosov, Dmitri ; Brandão, Anabela ; Mikhalev, Yuri Date: 2016 This study investigates possible regional variations in size composition of adult female sperm whales (Physeter macrocephalus) using data from 3302 pregnant individuals taken on Soviet whaling expeditions to the Southern Hemisphere 1961/62–1974/75. ... Read more
Identifying the "demon whale-biter": Patterns of scarring on large whales attributed to a cookie-cutter shark Isistius sp

Author: Best, Peter B ; Photopoulou, Theoni Date: 2016 The presence of crater-like wounds on cetaceans and other large marine vertebrates and invertebrates has been attributed to various organisms. We review the evidence for the identity of the biting agent responsible for crater wounds on large ... Read more c b
A note on possible change in the mean calving interval for southern right whales off South Africa

Author: Brandão, Anabela ; Best, Peter B ; Butterworth, Doug S Date: 2010 A simple approach has been applied to investigate whether resightings of female right whales with calves on annual aerial surveys off South Africa provide any evidence for a change in calving interval over the period from 1979 to 2006 for ... Read more
A note on possible changes in some demographic parameters for southern right whales off South Africa

Author: Brandão, Anabela ; Best, Peter B ; Butterworth, Doug S Date: 2010 The possibility of changes in demographic parameters for right whales off South Africa is examined through analysis of resightings data for females with calves over the 1979–2006 period. No statistically significant change in either adult ... Read more
Population structure of humpback whales from their breeding grounds in the South Atlantic and Indian Oceans

Author: Rosenbaum, Howard C ; Pomilla, Cristina ; Mendez, Martin ; Leslie, Matthew S ; Best, Peter B ; Findlay, Ken P ; Minton, Gianna ; Ersts, Peter J ; Collins, Timothy ; Engel, Marcia H Date: 2009 Although humpback whales are among the best-studied of the large whales, population boundaries in the Southern Hemisphere (SH) have remained largely untested. We assess population structure of SH humpback whales using 1,527 samples collected ... Read more c b
Preliminary results for a photo-identification-based assessment of southern right whales in South African waters

Author: Butterworth, Doug S ; Brandão, Anabela ; Müller, Andrea ; Best, Peter B Date: 2011 This working paper presents preliminary results of a photo-id based assessment of southern right whales in South African waters using the three-mature-stages (receptive, calving, resting) model of Cooke et al. (2003). The application of the ... Read more
Preliminary results for a photo-identification-based assessment of southern right whales in South African waters

Author: Butterworth, Doug S ; Brandão, Anabela ; Müller, Andrea ; Best, Peter B Date: 2011 This working paper presents preliminary results of a photo-id based assessment of southern right whales in South African waters using the three-mature-stages (receptive, calving, resting) model of Cooke et al. (2003). The application of the ... Read more
Updated estimates of demographic parameters for Southern right whales off South Africa

Author: Best, Peter B ; Brandão, Anabela ; Butterworth, Doug S Date: 2005 Aerial counts of right whale cow-calf pairs on the south coast of South Africa between 1971 and 2003 indicate an annual instantaneous population increase rate of 0.069 a year (SE 0.003) over this period. Annual photographic surveys since 1979 ... Read more