A total of 23 whale sharks were identified over a 5 d period in the Arta Bay region of the Gulf of Tadjora, Djibouti. Most of the sharks aggregating in this area were small (<4 m TL) males. Individuals were identified using photographs of distinctive scars and spot and stripe patterns on the sides of the animals. Of these, 65% had scarring that was attributable to boat or propeller strikes. Most of the whale sharks we encountered were feeding on dense accumulations of plankton in shallow water just off (10–200 m) the shoreline. This food source may account for the aggregation of sharks in this area. One 3 m male shark was tagged with an ARGOS (Splash) satellite tag for 9 d. During this time the shark traversed to the shoreline on the opposite side of the Gulf (a distance of 14 km) and then returned to the Arta Bay area before retracing his path to the other shore. The shark spent most of the daylight hours at the surface, while at night dives were more frequent, deeper and for longer durations.
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Anderson RC, Ahmed H (1993) Shark fisheries of the Maldives. Ministry of Fisheries and Agriculture, Maldives, and FAO, Rome 73 pp
Carey FG, Scharold JV (1990) Movements of blue sharks (Prionace glauca) in depth and course. Mar Biol 106:329–342
Carne L. Whale shark tourism at Gladden Spit marine reserve Belize, Central America. In: Irvine TR, Keesing JK (eds) The first international whale shark conference: Promoting international collaboration in whale shark conservation, science and management. CSIRO Marine and Atmospheric Research, Australia (in press)
Clarke E, Nelson DR (1997) Young whale sharks, Rhincodon typus, feeding on a copepod bloom near La Paz, Mexico. Environ Biol Fishes 50:63–73
Colman JG (1997) A review of the biology and ecology of the whale shark. J Fish Biol 51:1219–1234
Compagno LJV (2001) Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Food and Agriculture Organization of the United Nations, Rome
Conway DVP, Williams R (1986) Seasonal population structure, vertical distribution and migration of the chaetognath Sagitta elegans in the Celtic sea. Mar Biol 93:377–387
Coyne MS, Godley BJ (2005) Satellite Tracking and Analysis Tool (STAT): an integrated system for archiving, analyzing and mapping animal tracking data. Mar Ecol Prog Ser 301:1–17
Eckert S, Dolar L, Kooyman G, Perin W, Rahman A (2002) Movements of whale sharks, (Rhyncodon typus), in South East Asian waters as determined by satellite telemetry. J Zool 257:111–115
Eckert S, Stewart B (2001) Telemetry and satellite tracking of whale sharks, Rhyncodon typus, in the Sea of Cortez, Mexico, and north Pacific Ocean. Environ Biol Fishes 60:299–308
Graham, R. Iterative planning and adaptive management of whale shark tourism in Belize: global implications of lessons learnt from 1998 and 2004. In: Irvine TR, Keesing JK (eds) The first international whale shark conference: Promoting international collaboration in whale shark conservation, science and management. CSIRO Marine and Atmospheric Research, Australia (in press)
Graham, RT, Roberts CM, Smart JCR (2005) Diving behaviour of whale sharks in relation to a predictable food pulse. Interface. J R Soc. doi:10.1098/rsif.2005.0082:1–8
Gudger EW (1937) A whale shark speared on the bow of a steamer in the Caribbean Sea. Copeia 1:60
Gunn JS, Stevens JD, Davis TLO, Norman BD (1999) Observations on the short term movements and behaviour of whale sharks (Rhincodon typus) at Ningaloo Reef, Western Australia. Mar Biol 135:553–559
Hanfee F (2001) Trade in Whale shark and its products in the coastal state of Gujarat, India. TRAFFIC India, New Delhi
Heyman W, Graham R, Kjerfve B, Johannes RE (2001) Whale sharks Rhincodon typus aggregate to feed on fish spawn in Belize. Mar Ecol Prog Ser 215:275–282
Josse E, Bach P, Dagorn L (1998) Simultaneous observations of tuna movements and their prey by sonic tracking and acoustic surveys. Hydrobiologia 372:61–69
Joung SJ, Chen CT, Clark E, Uchida S, Huang WYP (1996) The whale shark, Rhincodon typus, is a live-bearer: 300 embryos found in one ‘megamamma’ supreme. Environ Biol Fishes 46:219–223
Meekan MG, Bradshaw CJA, Press M, McLean C, Richards A, Quasnichka S, Taylor JA (2006) Population size and structure of whale sharks (Rhincodon typus) at Ningaloo Reef, Western Australia. Mar Ecol Prog Ser 319:275–285
Newman HE, Medcraft AJ, Colman JG (1997) Whaleshark Tagging and Ecotourism Elasmobrach Biodiversity, Conservation and Management, International Seminar and Workshop, IUCN, Sabah, Malaysia
Pine R, Alava MNR, Yaptinchay AA. Challenges and lessons learned in setting-up a community-based whale shark eco-tourism program: The case in Donsol, Philippines. In: Irvine TR, Keesing JK (eds) The first international whale shark conference: Promoting international collaboration in whale shark conservation, science and management. CSIRO Marine and Atmospheric Research, Australia (in press)
Quiros, AL. Tourist compliance to a code of conduct and the resulting effects on whale shark (Rhincodon typus) behavior in Donsol, Philippines. In: Irvine TR, Keesing JK (eds) Whale sharks: Science, conservation and management. Proceedings of the first international whale shark conference, 9–12 May 2005, Australia, Fisheries Research special issue (in press)
Rowat D (1997) Seychelles whale shark tagging project—pilot project report. Phelsuma, Nat Prot Trust Seychelles 5:77–80
Rowat D, Gore M. Regional scale horizontal and local scale vertical movements of whale sharks in the Indian Ocean off Seychelles. In: Irvine TR, Keesing JK (eds) Whale sharks: Science, conservation and management. Proceedings of the first International whale shark conference, 9–12 May 2005, Australia. Fisheries Research special issue (in press)
Silas EG (1986) The whale shark (Rhincodon typus Smith) in Indian coastal waters: is the species endangered or vulnerable? CMFRI, Marine Fisheries Information Service, Cochin, pp 1–19
Sims D, Southall E, Quayle V, Fox M (2000) Annual social behaviour of basking sharks associated with coastal front areas. Proceedings of the Royal Society, London B:1897–1904
Sims DW, Southall EJ, Tarling GA, Metcalfe JD (2005) Habitat-specific normal and reverse diel vertical migration in the plankton-feeding basking shark. J Anim Ecol 74:755
Smith A (1829) Contributions to the natural history of South Africa. Zool J 443–444
Springer S (1967) Social organisation of shark populations. In: Gilbert PW, Mathewson RF, Rall DP (eds) Sharks, skates and rays, Johns Hopkins Press, Baltimore, pp 149–174
Staszewski V, Conte E, Pardigon B, Takeda S, Jouannet D, Vely M. Whale shark (Rhincodon typus) in Djibouti (Horn of Africa): Conciliation of ecotourism development, conservation and development of a scientific programme. In: Irvine TR, Keesing JK (eds) The first international whale shark conference: Promoting international collaboration in whale shark conservation, science and management. CSIRO Marine and Atmospheric Research, Australia (in press)
Taylor G (1989) Whale sharks of Ningaloo Reef, Western Australia: a preliminary study. West Austr Nat 18:7–12
Taylor G (1994) Whale sharks. Angus, Robertson, Sydney, Australia
Taylor G (1996) Seasonal occurrence, distribution and movements of the whale shark, Rhincodon typus, at Ningaloo Reef, Western Australia. Mar Freshw Res 47:637–642
Wilson SG, Newbound DR (2001) Two whale shark faecal samples from Ningaloo Reef, Western Australia. Bull Mar Sci 68:367–362
Wilson SG, Polovina JJ, Stewart BS, Meekan MG (2006) Movements of whale sharks (Rhincodon typus) tagged at Ningaloo Reef, Western Australia. Mar Biol 148:1157–1166
Wilson SG, Taylor JG, Pearce AF (2001) The seasonal aggregation of whale sharks at Ningaloo Reef, Western Australia: currents, migrations and El Nino/Southern Oscillation. Environ Biol Fishes 61:1–11
We would like to thank the Marine Conservation Society Djibouti and their principle partner ‘Megaptera’ for the invitation to visit and participate in this research programme. The costs of the programme were sponsored largely by the Cooperation Service of the French Embassy in Djibouti (SCAC), by local tour operator Dolphin Excursions Sarl, and by the Fondation Nature & Decouvertes. Our thanks also to the Ministry of Environment, Djibouti, for their support and permission to undertake this research, to the Australian Institute of Marine Science and the Marine Conservation Society Seychelles for technical support. We would also acknowledge the valuable comments of two anonymous reviewers.
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Rowat, D., Meekan, M.G., Engelhardt, U. et al. Aggregations of juvenile whale sharks (Rhincodon typus) in the Gulf of Tadjoura, Djibouti. Environ Biol Fish 80, 465–472 (2007). https://doi.org/10.1007/s10641-006-9148-7
- Whale shark
- Rhincodon typus