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SCUBA diver observations and placard tags to monitor grey reef sharks, Carcharhinus amblyrhynchos, at Sha'ab Rumi, The Sudan: assessment and future directions

Published online by Cambridge University Press:  30 August 2011

Nigel E. Hussey ,
Noémie Stroh ,
Rebecca Klaus ,
Tarik Chekchak  and
Steven T. Kessel
Nigel E. Hussey*
Affiliation:
The Cousteau Society/Equipe Cousteau, 92 Avenue Kléber, 75016 Paris, France Great Lakes Institute for Environmental Science, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada
Noémie Stroh
Affiliation:
The Cousteau Society/Equipe Cousteau, 92 Avenue Kléber, 75016 Paris, France
Rebecca Klaus
Affiliation:
The Cousteau Society/Equipe Cousteau, 92 Avenue Kléber, 75016 Paris, France
Tarik Chekchak
Affiliation:
The Cousteau Society/Equipe Cousteau, 92 Avenue Kléber, 75016 Paris, France
Steven T. Kessel
Affiliation:
The Cousteau Society/Equipe Cousteau, 92 Avenue Kléber, 75016 Paris, France Cardiff University, School of Biosciences, Biomedical Sciences Building, Museum Avenue, Cardiff, CF10 3XQ, Wales
*
Correspondence should be addressed to: N.E. Hussey, Great Lakes Institute for Environmental Science, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada email: nehussey@uwindsor.ca
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Abstract

Establishing baseline data on the abundance of threatened shark species is critical for monitoring site- and region-specific population tends over time. This is of particular importance for monitoring sharks at remote locations or in regions where there are no reliable data on shark numbers, fishing effort and current population status. Through establishing a standardized recreational SCUBA diver observation programme, this study examined the number, size and sex-composition of grey reef sharks, Carcharhinus amblyrhynchos, on a remote coral reef system off the Red Sea coast of Sudan. In addition, placard tags were attached to individual sharks to examine coarse scale residency and movement patterns and to determine the effectiveness of this technique. Over a 4.5 month period (December 2007–April 2008), a mean (±SE) of 5.9 ± 0.3 grey reef sharks were observed per diving day with peak numbers of sharks associated with temperatures of 26–26.9°C and strong currents. Estimated mean (±SE) total length of observed sharks was 1.9 ± 0.03 m identifying that most animals were mature. Female sharks were dominant on the site and pregnant females were recorded. Placard tagged sharks (N = 4) were observed by recreational SCUBA divers throughout the study period (23.1%, 20.0%, 16.9% and 3.1% of total observation diving days) indicating sporadic site attachment. The placard tags remained intact and were free of fouling for a total of 175 days. The numbers of grey reef sharks seen on this Red Sea coral complex suggest a healthy, relatively unexploited population. This study demonstrates that the recreational diver community, which forms a large pool of skilled volunteers, can generate baseline data on shark numbers at regularly dived sites and provide insights into the ecology of the observed species. Modification of placard tags, including attachment to the dorsal fin and time corrodible release systems may provide an inexpensive and accepted tool for monitoring individual shark residency and movement patterns. Engaging the recreational SCUBA diver community in a standardized scientific monitoring programme has the potential to monitor trends in shark populations over large spatial and temporal scales.

Keywords

Carcharhinus amblyrhynchosgrey reef sharkrecreational SCUBA diver monitoringplacard tagbaseline abundance dataSudanRed Sea

Information

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Special Issue 2: Fish and Fisheries , March 2013 , pp. 299 - 308
Copyright
Copyright © Marine Biological Association of the United Kingdom 2011

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References

REFERENCES

Anderson, R.C. and Ahmed, H. (1993) Shark fisheries of the Maldives. Male/Rome: Ministry of Fisheries and Agriculture/FAO, 73 pp.Google Scholar
Anderson, R.C., Sheppard, C.R.C., Spalding, M.D. and Crosby, R. (1998) Shortage of sharks at Chagos. Shark News. Newsletter of the IUCN Shark Specialist Group, 10 1–3.Google Scholar
Bansemer, C.S. and Bennett, M.B. (2008) Multi-year validation of photographic identification of grey nurse sharks, Carcharias taurus, and applications for non-invasive conservation research. Marine and Freshwater Research 59, 322–331.CrossRefGoogle Scholar
Bansemer, C.S. and Bennett, M.B. (2009) Reproductive periodicity, localised movements and behavioural segregation of pregnant Carcharias taurus at Wolf Rock, southeast Queensland, Australia. Marine Ecology Progress Series 374, 215–227.Google Scholar
Bansemer, C.S. and Bennett, M.B. (2010) Retained fishing gear and associated injuries in the east Australian grey nurse sharks (Carcharias taurus): implications for population recovery. Marine and Freshwater Research 61, 97–103.CrossRefGoogle Scholar
Baum, J.K., Myers, R.A., Kehler, D.G., Worm, B., Harley, S.J. and Doherty, P.A. (2003) Collapse and conservation of shark populations in the Northwest Atlantic. Science 299, 389–392.Google Scholar
Bellamy, D. (1979) Half of paradise. London: Cassell.Google Scholar
Benson, S.R., Dutton, P.H., Hitipeuw, C., Samber, B., Bakarbessy, J. and Parker, D. (2007) Post-nesting migrations of leatherback turtles (Dermochelys coriacea) from Jamursba-Medi, Bird's Head Peninsula, Indonesia. Chelonian Conservation Biology 6, 150–154.Google Scholar
Bonfil, R. and Abdallah, M. (2004) Field identification guide to sharks and rays of the Red Sea and Gulf of Aden. FAO species identification guide for fishery purposes. Rome: FAO, 71 pp.Google Scholar
Cater, C. (2008) Perceptions of and interactions with marine environments: Diving attractions from great whites to pygmy seahorses. In Garrod, B. and Gössling, S. (eds) New frontiers in marine tourism: diving experiences, sustainability, management. Oxford: Elsevier, pp. 49–64.Google Scholar
Chapman, D.D., Pikitch, E.K., Babcock, E.A. and Shivji, M.S. (2007) Deep-diving and diel changes in vertical habitat use by Caribbean reef sharks Carcharhinus perezi . Marine Ecology Progress Series 344, 271–275.Google Scholar
Compagno, L.J.V. (1984) FAO species catalogue, Volume 4. Sharks of the world; an annotated and illustrated catalogue of shark species known to date. Part 2. Carcharhiniformes. FAO Fisheries Synopsis 125, 251–655.Google Scholar
Dudgeon, C.L., Noad, M.J. and Lanyon, J.M. (2008) Abundance and demography of a seasonal aggregation of zebra sharks, Stegostoma fasciatum. Marine Ecology Progress Series 368, 269–281.CrossRefGoogle Scholar
Economakis, A.E. and Lobel, P.S. (1998) Aggregation behaviour of the grey reef shark, Carcharhinus amblyrhynchos, at Johnston Atoll, central Pacific Ocean. Environmental Biology of Fishes 51, 129–139.Google Scholar
Field, I.C., Meekan, M.G., Speed, C.W., White, W. and Bradshaw, C.J.A. (2011) Quantifying movement patterns for shark conservation at remote coral atolls in the Indian Ocean. Coral Reefs 30, 61–71.Google Scholar
Gleiss, A.C.N., Norman, B., Liebsch, N., Francis, C. and Wilson, R.P. (2009) A new prospect for tagging large free swimming sharks with motion sensitive data loggers. Fisheries Research 97, 11–16.Google Scholar
Goffredo, S., Piccinetti, C. and Zaccanti, F. (2005) Volunteers in marine conservation monitoring: a study of the distribution of seahorse carried out in collaboration with recreational scuba divers. Conservation Biology 18, 1492–1503.Google Scholar
Graham, N.A.-J., Spalding, M.D. and Sheppard, R.C. (2010) Reef shark declines in remote atolls highlight the need for multi-faceted conservation action. Aquatic Conservation: Marine and Freshwater Ecosystems 20, 543–548.Google Scholar
Graham, R.T. and Roberts, C.M. (2007) Assessing the size, growth rate and structure of a seasonal population of whale sharks (Rhincodon typus Smith 1828) using conventional tagging and photo identification. Fisheries Research 84, 71–80.Google Scholar
Heupel, M.R., Simpfendorfer, C.A. and Bennett, M.B. (1998) Analysis of tissue responses to fin tagging in Australian carcharhinids. Journal of Fish Biology 52, 610–620.CrossRefGoogle Scholar
Heupel, M.R., Williams, A.J., Welch, D.J., Ballagh, A., Mapstone, B.D., Carlos, G., Davies, C.R. and Simpfendorfer, C.A. (2009) Effects of fishing on tropical reef associated shark populations on the Great Barrier Reef. Fisheries Research 95, 350–361.CrossRefGoogle Scholar
Heupel, M.R., Simpfendorfer, C.A. and Fitzpatrick, R. (2010) Large-scale movement and reef fidelity of grey reef sharks. PLoS ONE 5, e9650.Google Scholar
Hobson, E.S. (1963) Feeding behaviour in three species of sharks. Pacific Science 17, 171–194.Google Scholar
Holmberg, J., Norman, B. and Arzoumanian, Z. (2008) Robust, comparable population metrics through collaborative photo-monitoring of whale sharks, Rhincodon typus. Ecological Applications 18, 222–233.CrossRefGoogle ScholarPubMed
Hooker, S.K. and Gerber, L.R. (2004) Marine reserves as a tool for ecosystem-based management: the potential importance of megafauna. BioScience 54, 27–39.Google Scholar
Huveneers, C., Luo, K., Otway, N.M. and Harcourt, R.G. (2009) Assessing the distribution and relative abundance of wobbegong sharks (Orectolobidae) in New South Wales, Australia, using recreational scuba divers. Aquatic Living Resources 22, 255–264.CrossRefGoogle Scholar
Luiz, O.J., Balboni, A.P., Kodja, G., Andrade, M. and Marum, H. (2009) Seasonal occurrence of Manta birostris (Chondricthyes: Mobulidae) in south-eastern Brazil. Ichthyological Research 56, 96–99.Google Scholar
McKibben, J.N. and Nelson, D.R. (1986) Patterns of movement and grouping of grey reef sharks, Carcharhinus amblyrhynchos, at Enewetak, Marshall Islands. Bulletin of Marine Science 38, 89–110.Google Scholar
McVean, A.R., Walker, R.C.J. and Fanning, E. (2006) The traditional shark fisheries of southwest Madagascar: a study in the Toliara region. Fisheries Research 82, 280–289.Google Scholar
Meekan, M.G., Bradshaw, C.J.A., Press, M., McLean, C., Richards, A., Quasnichka, S. and Taylor, J.G. (2006) Population size and structure of whale sharks Rhincodon typus at Ningaloo Reef, Western Australia. Marine Ecology Progress Series 319, 275–285.Google Scholar
Mees, C., Pilling, G.M. and Barry, C.J. (1999) Commercial inshore fishing activities in the British Indian Ocean Territory. In Sheppard, C.R.C. and Seaward, M.R.D. (eds) Ecology of the Chagos Archipelago. Linnean Society Occasional Publication 2, Westbury Academic and Scientific Publishing, UK, pp. 327–345.Google Scholar
Meyer, C.G., Dale, J.J., Papastamatiou, Y.P., Whitney, N.M. and Holland, K.N. (2009) Seasonal cycles and long term trends in abundance and species composition of sharks associated with cage diving ecotourism activities in Hawaii. Environmental Conservation 36, 104–111.Google Scholar
Mucientes, G.R., Queiroz, N., Sousa, L.L., Tarroso, P. and Sims, D.W. (2009) Sexual segregation of pelagic sharks and the potential threat from fisheries. Biology Letters 5, 156–159.Google Scholar
Nelson, D.R. and Johnson, R.H. (1980) Behaviour of the reef sharks of Rangiroa, French Polynesia. National Geographic Society Research Report 12, 479–499.Google Scholar
Nelson, D.R., Johnson, R.R., McKibben, J.N. and Pittenger, G.G. (1986) Agonistic attacks on divers and submersibles by gray reef sharks, Carcharhinus amblyrhynchos: antipredatory or competitive? Bulletin of Marine Science 38, 68–88.Google Scholar
Oliver, S.P., Hussey, N.E., Turner, J.T. and Beckett, A.J. (2011) Oceanic sharks clean at coastal seamount. PLoS ONE 6, e14755. doi:10.1371/journal.pone.0014755 Google Scholar
Otway, N.M., Bradshaw, C.J.A. and Harcourt, R.G. (2004) Estimating the rate of quasi-extinction of the Australian grey nurse shark (Carcharias taurus) population using deterministic age- and stage classified models. Biological Conservation 119, 341–350.Google Scholar
Papastamatiou, Y.P., Wetherbee, B.M., Lowe, C.G. and Crow, G.L. (2006) Distribution and diet of four species of carcharhinid shark in the Hawaiian Islands: evidence for resource partitioning and competitive exclusion. Marine Ecology Progress Series 320, 239–251.Google Scholar
Parker, P. and Bucher, D.J. (2000) Seasonal variation in abundance and sex ratio of grey nurse (sand tiger) sharks, Carcharias taurus, in northern New South Wales, Australia: a survey based on observations of recreational scuba divers. Pacific Conservation Biology 5, 336–346.CrossRefGoogle Scholar
Robbins, W.D., Hisano, M., Connolly, S.R. and Howard Choat, J. (2006) Ongoing collapse of coral-reef shark populations. Current Biology 16, 2314–2319.Google Scholar
Rowat, D., Gore, M., Meekan, M.G., Lawler, I.R. and Bradshaw, C.J.A. (2009a) Aerial survey as a tool to estimate whale shark abundance trends. Journal of Experimental Marine Biology and Ecology 368, 1–8.Google Scholar
Rowat, D., Speed, C.W., Meekan, M.G., Gore, M.A. and Bradshaw, C.J.A. (2009b) Population abundance and apparent survival of the vulnerable whale shark Rhincodon typus in the Seychelles aggregation. Oryx 43, 591–598.Google Scholar
Sheppard, C.R.C. (1988) Chagos. In Wells, S. and Sheppard, C.R.C. (eds) Coral reefs of the world. Volume 2: Indian Ocean, Red Sea and Gulf. UNEP Regional Seas Directories and Bibliographies, IUCN, Gland, Switzerland and UNEP Nairobi, pp. 37–46.Google Scholar
Smale, M.J. (2005) Carcharhinus amblyrhynchos. In IUCN (2009). IUCN Red List of Threatened Species. Version 2009.2 (www.iucnredlist.org).Google Scholar
Stevens, J.D. and McLoughlin, K.J. (1991) Distribution, size and sex composition, reproductive biology and diet of sharks from Northern Australia. Australian Journal of Marine and Freshwater Research 42, 151–199.Google Scholar
Stevens, J.D., Bonfil, R., Dulvy, N.K. and Walker, P.A. (2000) The effects of fishing on sharks, ray and chimeras (chondrichthyans), and the implications for marine ecosystems. ICES Journal of Marine Science 57, 476–494.Google Scholar
Theberge, M.M. and Dearden, P. (2006) Detecting a decline in whale sharks Rhincodon typus sightings in the Andaman Sea, Thailand using ecotourist operator-collected data. Oryx 40, 337–342.Google Scholar
Topelko, K.N. and Dearden, P. (2005) The shark watching industry and its potential contribution to shark conservation. Journal of Ecotourism 4, 108–128.Google Scholar
Van Tienhoven, A.M., Den Hartog, J.E., Reijns, R.A. and Peddemors, V.M. (2007) A computer aided program for pattern-matching of natural marks on the spotted raggedtooth shark Carcharias taurus . Journal of Applied Ecology 44, 273–280.CrossRefGoogle Scholar
Ward-Paige, C., Mills Flemming, J. and Lotze, H.K. (2010a) Overestimating fish counts by non-instantaneous visual censuses: consequences for population and community descriptions. PloS ONE 5, e11722. doi:10.1371/journal.pone.0011722 Google Scholar
Ward-Paige, C.A., Mora, C., Lotze, H.K., Pattengill-Semmens, C., McClenachan, L., Arias-Castro, E. and Myers, R.A. (2010b) Large-scale absence of sharks on reefs in the Greater-Caribbean: a footprint of human pressures. PloS ONE 5, e11968. doi:10.1371/journal.pone.0011968 Google Scholar
Ward-Paige, C.A., Pattengill-Semmens, C., Myers, R.A. and Lotze, H.K. (2011) Spatial and temporal trends in yellow stingray abundance: evidence from diver surveys. Environmental Biology of Fishes 90, 263–276.Google Scholar
Wass, R.C. (1971) A comparative study of the life history, distribution and ecology of the sandbar shark and grey reef shark in Hawaii. PhD thesis. University of Hawaii, USA, 219 pp.Google Scholar
Wetherbee, B.M., Crow, G.L. and Lowe, C.G. (1997) Distribution, reproduction and diet of grey reef sharks Carcharhinus amblyrhynchos in Hawaii. Marine Ecology Progress Series 151, 181–189.Google Scholar
White, W.T. (2007) Catch composition and reproductive biology of whaler sharks (Carcharhiniformes: Carcharhinidae) caught by fisheries in Indonesia. Journal of Fish Biology 70, 1809–1837.Google Scholar