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Stomach contents of small cetaceans stranded along the Sea of Oman and Arabian Sea coasts of the Sultanate of Oman

Published online by Cambridge University Press:  06 February 2012

Louisa S. Ponnampalam ,
Tim J.Q. Collins ,
Gianna Minton ,
Isabelle Schulz ,
Howard Gray ,
Rupert F. G. Ormond  and
Robert M. Baldwin
Louisa S. Ponnampalam*
Affiliation:
Environment Society of Oman, PO Box 3955, P.C. 112, Ruwi, Sultanate of Oman University Marine Biological Station Millport, Isle of Cumbrae, Scotland KA28 0EG Institute of Ocean and Earth Sciences, C308, IPS Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
Tim J.Q. Collins
Affiliation:
Environment Society of Oman, PO Box 3955, P.C. 112, Ruwi, Sultanate of Oman Ocean Giants Program, Wildlife Conservation Society, 2300 Southern Boulevard, Bronx, New York 10460, USA
Gianna Minton
Affiliation:
Environment Society of Oman, PO Box 3955, P.C. 112, Ruwi, Sultanate of Oman Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
Isabelle Schulz
Affiliation:
Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
Howard Gray
Affiliation:
School of Biomedical Sciences, University of Durham, South Road DH1 3LE
Rupert F. G. Ormond
Affiliation:
University Marine Biological Station Millport, Isle of Cumbrae, Scotland KA28 0EG Marine Conservation International, 5/6 Lang Rigg South Queensferry, Edinburgh, Scotland EH30 9WN
Robert M. Baldwin
Affiliation:
Environment Society of Oman, PO Box 3955, P.C. 112, Ruwi, Sultanate of Oman
*
Correspondence should be addressed to: L.S. Ponnampalam, Environment Society of Oman, PO Box 3955, P.C. 112, Ruwi, Sultanate of Oman email: [email protected]
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Abstract

This study examined the stomach contents of 11 bottlenose dolphins (Tursiops sp.), five Indo-Pacific humpback dolphins (Sousa chinensis) and two spinner dolphins (Stenella longirostris) that were found stranded along the Omani coastline. Across the three species examined, a total of 4796 fish otoliths and 214 cephalopod beaks were found, representing at least 33 species in 22 families. Prey item importance was calculated using the percentage by number and percentage by frequency of occurrence methods, and a modified index of relative importance. The fish families Apogonidae, Carangidae and Scombridae were the most numerically important prey of the bottlenose dolphins. Sciaenidae was the most numerically important fish family for the Indo-Pacific humpback dolphins. The myctophid Benthosema pterotum formed the majority of the prey items of spinner dolphins. Cephalopod remains found in the stomach samples were represented by the families Sepiidae, Loliginidae and Onychoteuthidae. The known depth distribution of prey items of bottlenose dolphins indicated that the animals fed in a wide variety of habitats. Indo-Pacific humpback dolphin prey items indicated feeding in shallow coastal areas. Spinner dolphins appear to have exploited the upper 200 m of the water column for food, where their vertically migrating mesopelagic prey are found at night. Most prey species found in the stomach contents do not appear to be of current commercial importance in Oman. However, the findings here indicated that all three species of dolphins were feeding in areas where artisanal and/or commercial fishing occurs and has conservation implications.

Keywords

cetaceansstomach contentsdietsfeedinghabitatSea of OmanGulf of MasirahOman
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 8: Marine Mammals , December 2012 , pp. 1699 - 1710
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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References

REFERENCES

Al-Abdessalaam, T.Z.S. (1995) Marine species of the Sultanate of Oman. Ministry of Agriculture and Fisheries, Sultanate of Oman.Google Scholar
Al-Marzooqi, A.S. (2001) Feasibility study of the mesopelagic (myctophids) commercial fishery in the Gulf of Oman. MSc thesis. University of Hull, United Kingdom.Google Scholar
Amir, O.A., Berggren, P., Ndaro, S.G.M. and Jiddawi, N.S. (2005) Feeding ecology of the Indo-Pacific bottlenose dolphin (Tursiops aduncus) incidentally caught in the gillnet fisheries off Zanzibar, Tanzania. Estuarine, Coastal and Shelf Science 63, 429–437.CrossRefGoogle Scholar
Baldwin, R. (2003) Whales and dolphins of Arabia. Muscat: Mazoon Printing Press L.L.C.Google Scholar
Baldwin, R.M., Van Waerebeek, K. and Gallagher, M. (1998) A review of small cetaceans from waters off the Arabian Peninsula. Document SC/50/SM6 presented at the 50th meeting of the International Whaling Commission, 26 pp.Google Scholar
Baldwin, R.M., Collins, T., Van Waerebeek, K. and Minton, G. (2004) The Indo-Pacific humpback dolphin of the Arabian region: a status review. Aquatic Mammals 30, 111–124.CrossRefGoogle Scholar
Banzon, V.F., Evans, R.E., Gordon, H.R. and Chomko, R.M. (2004) SeaWiFS observations of the Arabian Sea southwest monsoon bloom for the year 2000. Deep-Sea Research Part II: Topical Studies in Oceanography 51, 189–208.CrossRefGoogle Scholar
Barros, N.B. and Wells, R.S. (1998) Prey and feeding patterns of resident bottlenose dolphins (Tursiops truncatus) in Sarasota Bay, Florida. Journal of Mammalogy 79, 1045–1059.CrossRefGoogle Scholar
Barros, N.B., Jefferson, T.A. and Parsons, E.C.M. (2004) Feeding habits of Indo-Pacific humpback dolphins (Sousa chinensis) stranded in Hong Kong. Aquatic Mammals 30, 179–188.CrossRefGoogle Scholar
Barros, N.B., Parsons, E.C.M. and Jefferson, T.A. (2000) Prey of offshore bottlenose dolphins from the South China Sea. Aquatic Mammals 26, 2–6.Google Scholar
Benoit-Bird, K.J. (2004) Prey calorie value and predator energy needs: foraging predictions for wild spinner dolphins. Marine Biology 145, 435–444.CrossRefGoogle Scholar
Bowen, W.D. and Siniff, D.R. (1999) Distribution, population biology, and feeding ecology of marine mammals. In Reynolds, J.E. and Rommel, S.A. (eds) Biology of marine mammals. Washington, DC: Smithsonian Institution Press, pp. 423–484.Google Scholar
Butler, J.L. (1979) The nomeid genus Cubiceps (Pisces) with a description of a new species. Bulletin of Marine Science 29, 226–241.Google Scholar
Clarke, M. (1986) Handbook for the identification of cephalopod beaks. Oxford: Oxford University Press.Google Scholar
Clarke, T.A. (1973) Some aspects of the ecology of lanternfishes (Myctophidae) in the Pacific Ocean near Hawaii. Fishery Bulletin 71, 401–433.Google Scholar
Dalpadado, P. and Gjøsaeter, J. (1988) Feeding ecology of the lanternfish Benthosema pterotum from the Indian Ocean. Marine Biology 99, 555–567.CrossRefGoogle Scholar
Di Beneditto, A.P.M. and Siciliano, S. (2007) Stomach contents of the marine tucuxi dolphin (Sotalia guianensis) from Rio de Janeiro, south-eastern Brazil. Journal of the Marine Biological Association of the United Kingdom 87, 253–254.CrossRefGoogle Scholar
Dolar, M.L.L., Walker, W.A., Kooyman, G.L. and Perrin, W.F. (2003) Comparative feeding ecology of spinner dolphins (Stenella longirostris) and Fraser's dolphins (Lagenodelphis hosei) in the Sulu Sea. Marine Mammal Science 19, 1–19.CrossRefGoogle Scholar
Findlay, K.P., Best, P.B., Ross, G.J.B. and Cockcroft, V. (1992) The distribution of small odontocete cetaceans off the coasts of South Africa and Namibia. South African Journal of Marine Science 12, 237–270.CrossRefGoogle Scholar
Fitch, J.E. and Brownell, R.L. Jr (1968) Fish otoliths in cetacean stomachs and their importance in interpreting feeding habits. Journal of the Fisheries Research Board of Canada 25, 2561–2574.CrossRefGoogle Scholar
Geraci, J.R. and Lounsbury, V.J. (2005) Marine mammals ashore: a field guide for strandings. 2nd edition. Baltimore, MD: National Aquarium in Baltimore.Google Scholar
Gjøsaeter, J. (1984) Mesopelagic fish, a large potential resource in the Arabian Sea. Deep- Sea Research Part I 31, 1019–1035.CrossRefGoogle Scholar
Heemstra, P.C. (1995) Additions and corrections for the 1995 impression. In Smith, M.M. and Heemstra, P.C. (eds) Revised edition of Smiths' sea fishes. Berlin: Springer-Verlag, pp. 5–15.Google Scholar
Heezik, Y.V. and Seddon, P. (1989) Stomach sampling in the Yellow-eyed Penguin: erosion of otoliths and squid beaks. Journal of Field Ornithology 60, 451–458.Google Scholar
Hui, C.A. (1985) Undersea topography and the comparative distributions of two pelagic cetaceans. Fishery Bulletin 83, 472–475.Google Scholar
Hyslop, E.J. (1980) Stomach contents analysis–a review of methods and their application. Journal of Fish Biology 17, 411–429.CrossRefGoogle Scholar
Jefferson, T.A. (2000) Population biology of the Indo-Pacific hump-backed dolphin in Hong Kong waters. Wildlife Monographs 144, 1–65.Google Scholar
Jereb, P. and Roper, C.F.E. (2005) Cephalopods of the world. An annotated and illustrated catalogue of cephalopod species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalogue for Fishery Purposes, No. 4, Volume 1, 262 pp.Google Scholar
Jobling, M. and Breiby, A. (1986) The use and abuse of fish otoliths in studies of feeding habits of marine piscivores. Sarsia 71, 265–274.CrossRefGoogle Scholar
Johannesson, K.A. (1995) Assessment of major marine fish stocks of demersal, small pelagic and mesopelagic species. Oman. R/V RASTRELLIGER acoustic & trawling survey results (November 1989–November 1990). FAO/UNDP Project for fisheries resources assessment survey, Muscat, Oman. Technical Report FI-DP/OMA/88/005, 226 pp.Google Scholar
Karbhari, J.P., Aravindakshan, M., Wagmare, K.B. and Gandhi, R. (1985) Note on the food of the spinner dolphin Stenella longirostris Gray, caught off Maharashtra coast. Journal of the Marine Biological Association of India 27, 193–195.Google Scholar
Krishnan, A.A., Yousuf, K.S., Kumaran, P.L., Harish, N., Anoop, B., Afsal, V.V., Rajagopalan, M., Vivekanandan, E., Krishnakumar, P.K. and Jayasankar, P. (2007) Stomach contents of cetaceans incidentally caught along Mangalore and Chennai coasts of India. Estuarine, Coastal and Shelf Science 76, 909–913.CrossRefGoogle Scholar
Krishnapillai, S. and Kasinathan, C. (1987) Some observations on dolphins in Mandapam area with a note on their food. Marine Fisheries Information Service Technical and Extension Series 71, 13–16.Google Scholar
Kubodera, T. (2005) Manual for the identification of cephalopod beaks in the Northwest Pacific. For researchers on feeding habits of marine mammals, seabirds and fishes. Version 1-1. Available online at http://research.kahaku.go.jp/zoology/Beak-E/index.htm (accessed 19 October 2011).Google Scholar
Lahaye, V., Bustamante, P., Spitz, J., Dabin, W., Das, K., Pierce, G.J. and Caurant, F. (2005) Long-term dietary segregation of common dolphins Delphinus delphis in the Bay of Biscay, determined using cadmium as an ecological tracer. Marine Ecology Progress Series 305, 275–285.CrossRefGoogle Scholar
McClatchie, S. and Dunford, A. (2003) Estimated biomass of vertically migrating mesopelagic fish off New Zealand. Deep-Sea Research Part I: Oceanographic Research Papers 50, 1263–1281.CrossRefGoogle Scholar
Ministry of National Economy (2007) Statistical Yearbook 2007. Volume 35. Available online at http://www.moneoman.gov.om/book/syb2008cd/english.html (accessed 19 October 2011).Google Scholar
Minton, G., Collins, T., Findlay, K. and Baldwin, R. (2010) Cetacean distribution in the coastal waters of the Sultanate of Oman. Journal of Cetacean Research and Management 11, 301–313.CrossRefGoogle Scholar
Murie, D.J. and Lavigne, D.M. (1985) Digestion and retention of Atlantic herring otoliths in the stomachs of grey seals. In Beddington, J.R., Beverton, R.J.H. and Lavigne, D.M. (eds) Marine mammals and fisheries. London: George Allen & Unwin, pp. 292–299.Google Scholar
Nakamura, I. and Parin, N.V. (1993) FAO species catalogue. Volume 15. Snake mackerels and cutlassfishes of the world (Families Gempylidae and Trichiuridae). An annotated and illustrated catalogue of the snake mackerels, snoeks, escolars, gemfishes, sackfishes, domine, oilfish, cutlassfishes, scabbardfishes, hairtails, and frostfishes known to date. FAO Fisheries Synopsis, No. 125, Volume 15, 136 pp.Google Scholar
Natarajan, R. and Rajaguru, A. (1983) Food and feeding habits of Stenella longirostris and Tursiops truncatus (Cetacea) off Porto-Novo, east coast of India. In Abstracts Fifth Biennial Conference on the Biology of Marine Mammals, November 27–December 1, 1983, Boston, Massachusetts.Google Scholar
Natarajan, R. and Rajaguru, A. (1985) Small cetaceans. Marine Mammal Science 1, 89.Google Scholar
Nelson, J.S. (1994) Fishes of the world. New York: John Wiley and Sons Inc.Google Scholar
Niño-Torres, C.A., Gallo-Reynoso, J.P., Galvan-Magana, F., Escobar-Briones, E. and Macko, S.A. (2006) Isotopic analysis of C13, N15, and S34 ‘A feeding tale’ in teeth of the longbeaked common dolphin, Delphinus capensis. Marine Mammal Science 22, 831–846.CrossRefGoogle Scholar
Paxton, J.R. and Hulley, P.A. (1999) Myctophidae. Lanternfishes. In Carpenter, K.E. and Niem, V.H. (eds) FAO species identification guide for fishery purposes. The living marine resources of the WCP. Volume 3. Batoid fishes, chimaeras and bony fishes part 1 (Elopidae to Linophrynidae). Rome: FAO, pp. 1957–1964.Google Scholar
Perrin, W.F. and Gilpatrick, J.W. (1994) Spinner dolphin Stenella longirostris (Gray, 1828). In Ridgway, S.H. and Harrison, R. (eds) Handbook of marine mammals. London: Academic Press, pp. 99–128.Google Scholar
Pinkas, L., Oliphant, M.S. and Iverson, I.L.K. (1971) Food habits of albacore, bluefin tuna and bonito in California waters. Fishery Bulletin 152, 1–105.Google Scholar
Ponnampalam, L.S. (2009) Ecological studies and conservation of small cetaceans in the Sultanate of Oman, with special reference to spinner dolphins, Stenella longirostris (Gray, 1828). PhD thesis. University Marine Biological Station Millport (University of London), Scotland, UK.Google Scholar
Randall, J.E. (1995) Coastal fishes of Oman. Bathurst, NSW: Crawford House Publishing Pty. Ltd.Google Scholar
Robertson, K.M. and Chivers, S.J. (1997) Prey occurrence in pantropical spotted dolphins, Stenella attenuata, from the eastern tropical Pacific. Fishery Bulletin 95, 334–348.Google Scholar
Robineau, D. and Fiquet, P. (1994) The Cetacea of the Jubail Marine Wildlife Sanctuary, Saudi Arabia. In Krupp, F., Abuzinada, A.H. and Nader, I.A. (eds) A marine wildlife sanctuary for the Arabian Gulf environmental research and conservation following the 1991 Gulf War oil spill. Riyadh, Saudi Arabia: National Commission for Wildlife Conservation and Development, pp. 438–458.Google Scholar
Robison, B.H. and Craddock, J.E. (1983) Mesopelagic fishes consumed by Fraser's dolphin, Lagenodelphis hosei. Fishery Bulletin 81, 283–289.Google Scholar
Sætersdal, G., Bianchi, G., Strømme, T. and Venema, S.C. (1999) The DR FRIDTJOF NANSEN Programme 1975–1993. Investigations of fishery resources in developing countries. History of the programme and review of results. FAO Fisheries Technical Paper, No. 391, 434 pp.Google Scholar
Salm, R.V. (1991) Live and beached cetacean observations, Sultanate of Oman. Scientific Results of the IUCN Coastal Zone Management Project CZMP4:F14.Google Scholar
Santos, M.B., Fernandez, R., Lopez, A., Martinez, J.A. and Pierce, G.J. (2007) Variability in the diet of bottlenose dolphin, Tursiops truncatus, in Galician waters, north-western Spain, 1990–2005. Journal of the Marine Biological Association of the United Kingdom 87, 231–241.CrossRefGoogle Scholar
Sasaki, K. (2001) Sciaenidae. Croakers (drums). In Carpenter, K.E. and Niem, V.H. (eds) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 5. Bony fishes part 3 (Menidae to Pomacentridae). Rome: FAO, pp. 3117–3174.Google Scholar
Sekiguchi, K. (1995) Occurrence, behavior and feeding habits of harbor porpoises (Phocoena phocoena) at Pajaro Dunes, Monterey Bay, California. Aquatic Mammals 21, 91–103.Google Scholar
Sekiguchi, K., Klages, N.T.W. and Best, P.B. (1992) Comparative analysis of the diets of smaller odontocete cetaceans along the coast of southern Africa. South African Journal of Marine Science 12, 843–861.CrossRefGoogle Scholar
Selzer, L.A. and Payne, P.M. (1988) The distribution of white-sided (Lagenorhynchus acutus) and common dolphins (Delphinus delphis) vs. environmental features of the continental shelf of the northeastern United States. Marine Mammal Science 4, 141–153.Google Scholar
Shomura, R.S. and Hida, T.S. (1965) Stomach contents of a dolphin caught in Hawaiian waters. Journal of Mammalogy 46, 500–501.CrossRefGoogle Scholar
Siddeek, M.S.M., Fouda, M.M. and Hermosa, G.V. Jr (1999) Demersal fisheries of the Arabian Sea, the Gulf of Oman and the Arabian Gulf. Estuarine, Coastal and Shelf Science 49, 87–97.Google Scholar
Silas, E.G., Nammalwar, P. and Sarvesan, R. (1985) On the food of sperm whale Physeter macrocephalus (Linnaeus 1758) at Tranquebar with a note on the food habits of sperm whales. In Proceedings of the Symposium on Endangered Marine Animals and Marine Parks 1985, Marine Biological Association of India 1, pp. 65–71.Google Scholar
Silver, M.W. (1975) The habitat of Salpa fusiformis in the California Current as defined by indicator assemblages. Limnology and Oceanography 20, 230–237.CrossRefGoogle Scholar
Smale, M.J., Watson, G. and Hecht, T. (1995) Otolith atlas of southern African marine fishes. Ichthyological Monographs No. 1. Grahamstown, South Africa: J.L.B. Smith Institute of Ichthyology.CrossRefGoogle Scholar
Smith, M.M. and Heemstra, P.C. (1986) Smith's sea fishes. Grahamstown, South Africa: J.L.B. Smith Institute of Ichthyology.CrossRefGoogle Scholar
Smith, S.C. and Whitehead, H. (2000) The diet of Galápagos sperm whales Physeter macrocephalus as indicated by fecal sample analysis. Marine Mammal Science 16, 315–325.CrossRefGoogle Scholar
Valinassab, T., Pierce, G.J. and Johannesson, K. (2007) Lantern fish (Benthosema pterotum) resources as a target for commercial exploitation in the Oman Sea. Journal of Applied Ichthyology 23, 573–577.CrossRefGoogle Scholar
Walker, W.A. (1981) Geographical variation in morphology and biology of the bottlenose dolphins (Tursiops) in the eastern North Pacific. NMFS/SWFC Administrative Report, No. LJ-81-03C.Google Scholar
Wang, W. (1995) Biology of Sousa chinensis in Xiamen Harbor. In Woo, J. and Liu, W. (eds) Conference on conservation of marine mammals in Fujian, Hongkong, and Taiwan. Specific publication of the Journal of Oceanography of the Taiwan Strait 4, pp. 21–26. [In Chinese.]Google Scholar
Wang, J.Y., Chou, L.-S. and White, B.N. (2000) Differences in the external morphology of two sympatric species of bottlenose dolphins (Genus Tursiops) in the waters of China. Journal of Mammalogy 81, 1157–1165.2.0.CO;2>CrossRefGoogle Scholar
Wells, R.S. and Scott, M.D. (2002) Bottlenose dolphins. In Thewissen, J.G.M. (ed.) Encyclopedia of marine mammals. San Diego, CA: Academic Press, pp. 122–128.Google Scholar