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Fluctuating abundance of humpback whales (Megaptera novaeangliae) in a calving ground off coastal Brazil

Published online by Cambridge University Press:  17 March 2008

Maria E. Morete ,
Tatiana L. Bisi ,
Richard M. Pace III  and
Sergio Rosso
Maria E. Morete*
Affiliation:
Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 321, São Paulo, SP, 055088-900, Brazil Instituto Baleia Jubarte, Rua Barão do Rio Branco, 26, Caravelas, BA, CEP 45900-000, Brazil
Tatiana L. Bisi
Affiliation:
Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 321, São Paulo, SP, 055088-900, Brazil Instituto Baleia Jubarte, Rua Barão do Rio Branco, 26, Caravelas, BA, CEP 45900-000, Brazil
Richard M. Pace III
Affiliation:
Northeast Fisheries Science Center, 166 Water St, Woods Hole, MA, 02543, USA
Sergio Rosso
Affiliation:
Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 321, São Paulo, SP, 055088-900, Brazil
*
Correspondence should be addressed to: Maria E. Morete, Rua Passo da Patria, 991 apto III, Cep: 05085-000 Sao Paulo, SP, Brazil email: miamorete@terra.com.br
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Abstract

The humpback whale (Megaptera novaeangliae) population that uses Abrolhos Bank, off the east coast of Brazil as a breeding ground is increasing. To describe temporal changes in the relative abundance of humpback whales around Abrolhos, seven years (1998–2004) of whale count data were collected during July through to November. During one-hour-scans, observers determined group size within 9.3 km (5 n.m.) of a land-based observing station. A total of 930 scans, comprising 7996 sightings of adults and 2044 calves were analysed using generalized linear models that included variables for time of day, day of the season, years and two-way interactions as possible predictors. The pattern observed was the gradual build-up and decline in whale counts within seasons. Patterns and peaks of adult and calf counts varied among years. Although fluctuation was observed, there was generally an increasing trend in adult counts among years. Calf counts increased only in 2004. These fluctuations may have been caused by some environmental conditions in humpback whales' summering grounds and also by changes in spatial–temporal concentrations in Abrolhos Bank. The general pattern observed within the study area mirrored what was observed in the whole Abrolhos Bank. Knowledge of the consistency with which humpback whales use this important nursing area should prove beneficial for designing future monitoring programmes especially related to whale watching activities around Abrolhos Archipelago.

Keywords

Abrolhos Bankabundancegeneralized linear modelhumpback whaleland-based stationMegaptera novaeangliae
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Special Issue 6: Marine Mammals , September 2008 , pp. 1229 - 1235
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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References

REFERENCES

Andriolo, A., Kinas, P.G., Engel, M.H. and Martins, C.C.A. (2006) Monitoring humpback whale (Megaptera novaeangliae) population in the Brazilian breeding ground, 2002 to 2005. International Whaling Commission 58th Meeting, SC/AO6/HW2. [available at www.iwcoffice.org]Google Scholar
Brown, M.R., Corkeron, P.J., Hale, P.T., Schultz, K.W. and Bryden, M. (1995) Evidence for sex segregated migration in the humpback whale (Megaptera novaeangliae). Proceedings of the Royal Society B 259, 229–234.Google ScholarPubMed
Burnham, K.P. and Anderson, D.R. (2002) Model selection and inference: a practical information-theoretic approach, 2nd ednNew York: Springer-Verlag.Google Scholar
Chittleborough, R.G. (1965) Dynamics of two populations of the humpback whale Megaptera nodosa (Bonaterre). Australian Journal of Marine Freshwater Research 16, 33–128.CrossRefGoogle Scholar
Clapham, P.J. (1996) The social and reproductive biology of Humpback Whales: an ecological perspective. Mammal Review 26, 27–49.CrossRefGoogle Scholar
Craig, A.S., Herman, L.M., Gabriele, C.M. and Pack, A.A. (2003) Migratory timing of humpback whales (Megaptera novaeangliae) in the Central North Pacific varies with age, sex and reproductive status. Behaviour 140, 981–1001.CrossRefGoogle Scholar
Darling, J.D., Gibson, K.M. and Silber, G.K. (1983) Observations on the abundance and behavior of the humpback whales (Megaptera novaeangliae) off West Maui, Hawaii, 1977–79. In Payne, R.S. (ed.) Communication and behavior of whales, Boulder, CO: Western Press, pp. 201–222.Google Scholar
Dawbin, W.H. (1966) The seasonal migratory cycle of humpback whales. In Norris, K.S. (ed.) Whales, dolphins, and porpoises, Berkeley, CA: University of California Press, pp. 145–170.CrossRefGoogle Scholar
Freitas, A.C., Kinas, P.G., Martins, C.C.A. and Engel, M.H. (2004) Abundance of humpback whales on the Abrolhos Bank wintering ground, Brazil. Journal of Cetacean Research and Management 6, 225–230.CrossRefGoogle Scholar
Helweg, D.A. and Herman, L.M. (1994) Diurnal patterns of behaviour and group membership of humpback whales (Megaptera novaeangliae) wintering in Hawaiian waters. Ethology 98, 298–311.CrossRefGoogle Scholar
Herman, L.M. and Antinoja, R.C. (1977) Humpback whales in the Hawaiian breeding waters: population and pod characteristics. Scientific Reports of the Whales Research Institute 29, 59–85.Google Scholar
Hilborn, R. and Mangel, M. (1997) The ecological detective. Confronting models with data. Princeton, NJ: Princeton University Press.Google Scholar
IBAMA/Funatura (1991) Plano de Manejo: Parque Nacional Marinho dos Abrolhos. Brasília. 96 pp.Google Scholar
Kinas, P.G. and Bethlem, C.B.P. (1998) Empirical Bayes abundance estimation of a closed population using mark-recapture data with application to humpback whales, Megaptera novaeangliae, in Abrolhos, Brazil. Report of the International Whale Commission 48, 447–450.Google Scholar
Lodi, L. (1994) Ocorrências de baleia jubarte, Megaptera novaeangliae, no Arquipélago de Fernando de Noronha incluindo um resumo de registros de captura no Nordeste do Brasil. Biotemas 7, 116–123.Google Scholar
Loeb, V., Siegel, V., Holm-Hansen, O., Hewitt, R., Fraser, W., Trivelpiece, W. and Trivelpiece, S.. (1997) Effects of sea ice extent and krill or salt dominance on the Antarctic food web. Nature 387, 897–900.CrossRefGoogle Scholar
Martins, C.C.A. (2004) O uso do Sistema de Informações Geográficas como ferramenta na identificação de áreas prioritárias para a conservação da baleia jubarte, Megaptera novaeangliae, em seu habitat reprodutivo na Costa Leste do Brasil. MSc thesis, Universidade de Brasilia, Brasilia, DF, Brazil.Google Scholar
Martins, C.C.A., Morete, M.E., Engel, M.H., Freitas, A.C., Secchi, E.R. and Kinas, P.G. (2001) Aspects of habitat use patterns of humpback whales in the Abrolhos Bank, Brazil, breeding ground. Memoirs of the Queensland Museum 47, 563–570.Google Scholar
Mattila, D.K., Clapham, P.J., Vasquez, O. and Bowman, R.S. (1994) Occurrence, population composition and habitat use of humpback whales in Samana Bay, Dominican Republic. Canadian Journal of Zoology 72, 1898–1907.CrossRefGoogle Scholar
McCullagh, P. and Nelder, J.A. (1989) Generalized linear models, 2nd ednLondon: Chapman & Hall.CrossRefGoogle Scholar
Mobley, J.R. and Herman, L.M. (1985) Transience of social affiliations among humpback whales (Megaptera novaeangliae) on the Hawaiian wintering grounds. Canadian Journal of Zoology 63, 762–772.CrossRefGoogle Scholar
Morete, M.E., Bisi, T.L. and Rosso, S. (2007) Temporal pattern of humpback whale (Megaptera novaeangliae) group structure around Abrolhos Archipelago breeding region, Bahia, Brazil. Journal of the Marine Biological Association of the United Kingdom 87, 87–92.CrossRefGoogle Scholar
Morete, M.E., Pace III, R.M., Martins, C.C.A., Freitas, A.C. and Engel, M.H. (2003) Indexing seasonal abundance of humpback whales around Arquipélago dos Abrolhos, Bahia, Brazil. Latin American Journal of Aquatic Mammals 2, 21–28.CrossRefGoogle Scholar
Pizzorno, J.L.A., Lailson-Brito, J. Jr, Dorneles, P.R., Azevedo, A.F. and Gurgel, I.M.G.N. (1998) Review of strandings and additional information on Humpback whales, Megaptera novaeangliae, in Rio de Janeiro, Southeastern Brazilian Coast (1981–1997). Report of the International Whaling Commission 48, 443–446.Google Scholar
R Development Core Team (2005) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL http://www.R-project.orgGoogle Scholar
Ricklefs, R.E. (1993) The economy of nature: a textbook in basic ecology, 3rd edn.New York: W.H. Freeman.Google Scholar
Siciliano, S. (1997) Características da população de baleias jubarte (Megaptera novaeangliae) na Costa Brasileira, com especial referência aos Bancos de Abrolhos. MSc thesis, Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brazil.Google Scholar
Stevick, P.T., Godoy, L.P., MCosker, M., Engel, M.H. and Allen, J. (2005) Movement of a humpback whale from Abrolhos Bank, Brazil to South Georgia (Antarctic Area II). Document SC/57/SH1 presented to the International Whaling Commission May–June 2005 (unpublished). 6 pp. Available from the International Whaling Commission, The Red House, 135 Station Road, Impington, Cambridge, CB4 9NP, UK.Google Scholar
Whitehead, H.P. (1983) Structure and stability of humpback whale groups off Newfoundland. Canadian Journal of Zoology 61, 1391–1397.CrossRefGoogle Scholar
Whitehead, H.P. and Moore, M.J. (1982) Distribution and movements of West Indian humpback whale in winter. Canadian Journal of Zoology 60, 2203–2211.CrossRefGoogle Scholar
Zerbini, A.N., Andriolo, A., Heide-Jorgensen, M.P., Pizzorno, J.L., Maia, Y.G., VanBlaricom, G.R., DeMaster, D.P., Simões-Lopes, P.C., Moreira, S. and Bethlem, C. (2006) Satellite-monitored movements of humpback whales (Megaptera novaeangliae) in the Southwest Atlantic Ocean. Marine Ecology Progress Series 313, 295–304.CrossRefGoogle Scholar