A case study of a lone humpback whale calf ( Megaptera novaeangliae) inside Baía de Todos os Santos, Bahia State, north-eastern Brazil, with implications for rescue procedures

Neto, Elitieri Santos; Rossi‐Santos, Marcos R.; Baracho, Clarêncio G.; Cipolotti, Sérgio R.; Sampaio, Cláudio L. S.; Velozo, Raquel Sá; Souto, Luciano Raimundo Alardo

doi:10.1017/s1755267207009840

Cited by 6 publications

(6 citation statements)

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“…Although cookie cutter sharks have been implicated as the cause of bite marks on a number of different species of cetaceans, generally reports of the bite marks are made in passing (e.g., Best & Shaugnessy, 1981;Matsuoka et al, 1996;Baird et al, 2006;Neto et al, 2007;Deakos et al, 2010), although some authors do describe them in more detail (e.g., Gasparini & Sazima, 1996;Walker & Hanson, 1999;Pérez-Zayas et al, 2002;Moore et al, 2003;McSweeney et al, 2007). Herein, we have compiled records of bite marks on 49 cetacean species.…”

Section: Discussionmentioning

confidence: 99%

“…The earliest of these was in 1993 (Record #4.2), and the most recent was from 2007, where one individual was a presumed female as she was accompanied by a neonate (Record #4.19; Figure 2). Collett, 1886Shevchenko, 1974Darling et al, 1995Kiefner, 2002Jefferson et al, 2008 Balaenoptera brydei Bryde's whale South Africa South Africa Hen and Chicken Islands, New Zealand Hauraki Gulf, New Zealand Tutukaka, New Zealand Olsen, 1913Best, 1977Jefferson et al, 2008Wiseman, 2008 Lillie, 1915Kiefner, 2002Moore et al, 2003Souto et al, 2007Neto et al, 2007Aschettino, 2010 Schonewald, 1978Leatherwood et al, 1988Cox, 1989Mead, 1989Paterson & van Dyck, 1990Darling et al, 1995Perrine, 1999Claridge, 2006McSweeney et al, 2007Jefferson et al, 2008 Mesoplodon europaeus Gervais' beaked whale Curaçao, Kingdom of the Netherlands Hatteras Island, North Carolina, USA Debrot & Barros, 1992Mead, 1989 Mesoplodon ginkgodens Ginkgo-toothed beaked whale Japan Ito, Japan Taiwan Leatherwood et al, 1988Mead, 1989Jefferson et al, 2008 Mesoplodon grayi Gray's beaked whale We collated 12 unpublished records of Type B orca in Antarctic waters with bite marks, with the earliest record in 1997 and the most recent from 2008 (Table 4). Of these, one individual had four bite marks, three individuals had five bite marks, and five individuals had three bite marks (Table 4).…”

Section: Antarctic Recordsmentioning

confidence: 99%

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Cookie Cutter Shark (Isistius sp.) Bites on Cetaceans, with Particular Reference to Killer Whales (Orca) (Orcinus orca)

Dwyer¹

2011

Aquat Mamm

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Forty-nine species of cetaceans have been recorded in the literature with cookie cutter shark (Isistius sp.) bites. The first record of a cookie cutter shark bite mark on orca (Orcinus orca) was from New Zealand waters in 1955. We present 37 unpublished records of cookie cutter shark bite marks on orca in tropical to cold waters; a further six published records were collated, and additionally 35 individuals with bite marks were noted in photo-identification catalogues. A total of 120 individuals and 198 bite marks were recorded, with the northernmost at 70° 44' N and the southernmost at 77° 14' S. We provide the first healing rate of a cookie cutter shark bite mark on an orca in New Zealand waters, with a maximum of 150 d between open wound and healed scar. Longevity of scars is considered, with one particular bite mark still visible as a dark grey oval/elliptic mark 1,158 d post photographing the open wound. Open cookie cutter shark bite marks were not observed on orca photographed in Antarctic waters, despite the majority of bite marks being recorded on Antarctic orca. This suggests a high level of movement outside the Antarctic cold water regions as the known distribution of cookie cutter sharks is in warm temperate to tropical waters. Supporting evidence for these movements is given by records of Antarctic orca in New Zealand waters with open cookie cutter shark bite marks.

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Section: Discussionmentioning

confidence: 99%

Section: Antarctic Recordsmentioning

confidence: 99%

Cookie Cutter Shark (Isistius sp.) Bites on Cetaceans, with Particular Reference to Killer Whales (Orca) (Orcinus orca)

Dwyer¹

2011

Aquat Mamm

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“…Pinedo, 1985;Lodi, 1994;Zerbini et al, 2006;Neto et al, 2007;Rossi-Santos et al, 2008;Meirelles et al, 2009). Population sizes of humpback whales using the north-eastern coast of Brazil were estimated at 628 (CV ¼ 0.335) individuals in 2000 to the north of the breeding concentration (Zerbini et al, 2004) and 6251 (CV ¼ 0.16) in 2005 along the entire breeding ground on the Brazilian coast.…”

Section: Introductionmentioning

confidence: 99%

“…The Abrolhos Bank (Bahia, Brazil) is the main breeding ground for humpback whales in the western South Atlantic (Martins et al , 2001; Morete et al , 2003b; Lunardi et al , 2008), but the species has been recorded from 3°S to 31°S (e.g. Pinedo, 1985; Lodi, 1994; Zerbini et al , 2006; Neto et al , 2007; Rossi-Santos et al , 2008; Meirelles et al , 2009). Population sizes of humpback whales using the north-eastern coast of Brazil were estimated at 628 (CV = 0.335) individuals in 2000 to the north of the breeding concentration (Zerbini et al , 2004) and 6251 (CV = 0.16) in 2005 (Andriolo et al , 2006) along the entire breeding ground on the Brazilian coast.…”

Section: Introductionmentioning

confidence: 99%

Behavioural strategies in humpback whales,Megaptera novaeangliae, in a coastal region of Brazil

et al. 2010

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The behavioural patterns of humpback whales are known to vary according to the social function of individuals in a group. To identify behavioural patterns related to specific group compositions, we observed events and behavioural states of humpback whales during research cruises in the Abrolhos Bank, Brazil, in the reproductive seasons from 1992 to 2003. We monitored 3022 groups and found a predominance of competitive groups without calves, when compared to competitive groups with calves. A Bayesian network analysis supplied occurrence probabilities for the behaviours analysed, indicating higher probabilities of occurrence for the behavioural patterns designated travelling and socializing. The model, generated from a binomial logistic regression, was able to predict competitive groups in association with the occurrence of the following aggressive behaviours: head-lunging, trumpet and bubblestreams. This study suggests the existence of behavioural patterns associated with specific group compositions and reinforces the concept that there is a clear-cut relation between competitive groups and the occurrence of aggressive behaviours. The preferential association of males to females with high reproductive potential for the following year (i.e. females without a calf) was also identified.

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“…(2008): 3 (predation) [ 332 ]; Neto et al . (2008): 4, fig 3 (predation, illustrated) in [ 333 ]; Araújo et al . (2010): 4 (predation) [ 334 ]; Klug & Kriwet (2010): 335, 337, 338 (phylogeny, stratigraphy) [ 335 ]; Lane (2010): 25 (morphology) [ 336 ]; Vialle et al .…”

Section: Resultsmentioning

confidence: 99%

Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae)

Petean

Carvalho

2018

PLoS ONE

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The dalatiid genus Isistius Gill (1864) has three valid species currently recognized in the literature: Isistius brasiliensis Quoy & Gaimard (1824), I. plutodus Garrick & Springer (1964), and I. labialis Meng, Zhu & Li (1985). The most common species, I. brasiliensis, has a wide geographic distribution and is found in subtemperate and tropical seas circumglobally. A comparative analysis of specimens from different localities throughout its range, however, had never been undertaken. In the present paper, the morphological variation of this species along its entire distribution has been thoroughly analyzed, corroborating that it represents a single widespread species and that I. labialis is its junior synonym. The other congeneric species, I. plutodus, is known from only a few specimens and is also distributed worldwide. A detailed comparative analysis of available material of I. plutodus was conducted verifying its validity as a single widespread species. The present study analyzed in detail the external morphology (coloration, dentition, dermal denticles), internal morphology (skeleton, musculature), lateral-line canals, and morphometric and meristic characters of species of Isistius in order to better define the genus and its included valid species.

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A case study of a lone humpback whale calf ( Megaptera novaeangliae) inside Baía de Todos os Santos, Bahia State, north-eastern Brazil, with implications for rescue procedures

Cited by 6 publications

References 10 publications

Cookie Cutter Shark (Isistius sp.) Bites on Cetaceans, with Particular Reference to Killer Whales (Orca) (Orcinus orca)

Cookie Cutter Shark (Isistius sp.) Bites on Cetaceans, with Particular Reference to Killer Whales (Orca) (Orcinus orca)

Behavioural strategies in humpback whales,Megaptera novaeangliae, in a coastal region of Brazil

Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae)

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