Abstract
Aggregation patterns of a population of juvenile blacktip sharks (Carcharhinus limbatus) within a summer nursery area were examined over a period of 3 years using an array of acoustic monitors. Individually coded acoustic tags were surgically implanted into 33–40 neonate sharks each year from 2000 to 2002 and their presence monitored continuously by the acoustic array. Data from the acoustic monitors was processed to estimate the center of activity location of each tagged shark every 30 min. Nearest neighbor analysis of shark locations revealed that sharks aggregated within the nursery in all years of the study. Sharks were aggregated most commonly during the early and late summer months (June, October and November) and became less common through the middle of the study period each year (July–September). Temporal periodicity within the data revealed a strong diel pattern with sharks aggregating during the day and dispersing at night, except in June when aggregations often persisted through the night. Aggregations were generally restricted to the mid and northern sections of the study site. Reasons for aggregations may include predator avoidance or improved feeding efficiency.
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References
Barbin GP (1998) The role of olfaction in homing and estuarine migratory behavior of yellow-phase American eels. Can J Fish Aquat Sci 55:564–575
Castro JI (1993) The shark nursery of Bulls Bay, South Carolina, with review of the shark nurseries of the southeastern coast of the United States. Environ Biol Fish 38:37–48
Clark PJ, Evans FC (1954) Distance to nearest neighbor as a measure of spatial relationships in populations. Ecology 35:445–453
Clarke TA (1971) The ecology of the scalloped hammerhead shark, Sphyrna lewini, in Hawaii. Pac Sci 25:133–144
Dittman AH, Quinn TP (1996) Homing in Pacific Salmon: mechanisms and ecological basis. J Exp Biol 199:83–91
Dodson JJ (1988) The nature and role of learning in the orientation and migratory behavior of fishes. Environ Biol Fish 23:161–182
Economakis AE, Lobel PS (1998) Aggregation behavior of the grey reef shark, Carcharhinus amblyrhynchos, at Johnston Atoll, Central Pacific Ocean. Environ Biol Fish 51:129–139
Gruber SH, Nelson DR, Morrissey JF (1988) Patterns of activity and space utilization of lemon sharks, Negaprion brevirostris, in a shallow Bahamian lagoon. Bull Mar Sci 43:61–76
Heupel MR, Hueter RE (2001) Use of an automated acoustic telemetry system to passively track juvenile blacktip shark movements. In: Sibert JR, Nielsen JL (eds) Electronic tagging and tracking in marine fisheries. Kluwer Academic Publishers, Netherlands, pp 217–236
Heupel MR, Hueter RE (2002) The importance of prey density in relation to the movement patterns of juvenile sharks within a coastal nursery area. Mar Freshw Res 53:543–550
Heupel MR, Simpfendorfer CA (2002) Estimation of survival and mortality of juvenile blacktip sharks, Carcharhinus limbatus, within a nursery area using telemetry data. Can J Fish Aquat Sci 59:624–632
Heupel MR, Simpfendorfer CA, Hueter RE (2004) Estimation of shark home ranges using passive monitoring techniques. Environ Biol Fish 71:135–142
Holland KN, Wetherbee BM, Peterson JD, Lowe CG (1993) Movements and distribution of hammerhead shark pups on their natal grounds. Copeia 1993:495–502
Hueter RE, Tyminski JP (2002) Center for Shark Research (CSR) U.S. shark nursery research overview 1991–2001. In: McCandless CT, Pratt HL Jr, Kohler NE (eds) Shark nursery grounds of the Gulf of Mexico and the East Coast waters of the United States: an overview. An internal report to NOAA’s Highly Migratory Species Office. NOAA Fisheries Narragansett Lab, Narragansett, pp 116–135
Hueter RE, Heupel MR, Heist EJ, Keeney DB (2004) Evidence of philopatry in sharks and implications for the management of shark fisheries. e-J Northw Atl Fish Sci V35, art. 7
Klimley AP (1985) Schooling in Sphyrna lewini, a species with low risk of predation: a non-egalitarian state. Z Tierpsychol 70:297–319
Klimley AP, Bulter SB (1988) Immigration and emigration of a pelagic fish assemblage to seamounts in the Gulf of California related to water mass movements using satellite imagery. Mar Ecol Prog Ser 49:11–20
Klimley AP, Nelson DR (1981) Schooling of the scalloped hammerhead shark, Sphyrna lewini, in the Gulf of California. Fish Bull 79:356–360
Klimley AP, Nelson DR (1984) Diel movement patterns of the scalloped hammerhead shark (Sphyrna lewini) in relation to El Bajo Espiritu Santo: a refuging central-position social system. Behav Ecol Sociobiol 15:45–54
Klimley AP, Butler SB, Nelson DR, Stull AT (1988) Diel movements of scalloped hammerhead sharks, Sphyrna lewini Griffith and Smith, to and from a seamount in the Gulf of California. J Fish Biol 33:751–761
Klimley AP, Le Boeuf BJ, Cantara KM, Richert JE, Davis SF, Van Sommeran S (2001a) Radio-acoustic positioning as a tool for studying site-specific behavior of the white shark and other large marine species. Mar Biol 138:429–446
Klimley AP, Le Boeuf BJ, Cantara KM, Richert JE, Davis SF, Van Sommeran S, Kelly JT (2001b) The hunting strategy if white sharks (Carcharhodon carcharhias) near a seal colony. Mar Biol 138:617–636
Klimley AP, Jorgensen SJ, Muhlia-Melo A, Beavers SC (2003) The occurrence of yellowfin tuna (Thunnus albacares) at Espiritu Santo seamount in the Gulf of California. Fish Bull 101:684–692
Krebs CJ (1998) Ecological methodology, 2nd edn. Addison Wesley Longman, Menlo Park
Leising AW, Yen J (1997) Spacing mechanisms within light-induced copepod swarms. Mar Ecol Prog Ser 155:127–135
Lowe CG (2001) Metabolic rates of juvenile scalloped hammerhead sharks (Sphyrna lewini). Mar Biol 139:447–453
McKibben JN, Nelson DR (1986) Patterns of movement and grouping of gray reef sharks, Carcharhinus amblyrhynchos, at Enewetak, Marshall Islands. Bull Mar Sci 38:89–110
Ohta I, Kakuma S (2005) Periodic behavior and residence time of yellowfin and bigeye tuna associated with fish aggregating devices around Okinawa Islands, as identified with automated listening stations. Mar Biol 146:581–594
Pitcher TJ, Parrish JK (1993) Functions of shoaling behaviour in teleosts. In: Pitcher TJ (ed) Behaviour of teleost fishes, 2nd edn. Chapman and Hall, London, pp 363–439
Pitcher TJ, Wyche CJ (1983) Predator-avoidance behaviours of sand-eel schools: why schools seldom split. In: Noakes DLG, Lindquist DG, Helfman GS, Ward JA (eds) Predators and prey in fishes. Dr. W. Junk Publishers, Netherlands, pp 193–204
Pitcher TJ, Wyche CJ, Magurran AE (1982) Evidence for position preferences in schooling mackerel. Anim Behav 30:932–934
Romey WL (1995) Position preferences within groups: do whirligigs select positions which balance feeding opportunities with predator avoidance? Behav Ecol Sociobiol 37:195–200
Simpfendorfer CA, Heupel MR, Hueter RE (2002) Estimation of short-term centers of activity from an array of omnidirectional hydrophones, and its use in studying animal movements. Can J Fish Aquat Sci 59:23–32
Warner RM (1998) Spectral analysis of time-series data. The Guilford Press, New York
Acknowledgements
Funding from the National Science Foundation (Award No OCE-9911295) supported this work. We thank M. Amato, J. Morris, T. Wilkie, J. Tyminski, M. Conn, and numerous student volunteers for assistance with field efforts.
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Communicated by P. W. Sammarco, Chauvin
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Heupel, M.R., Simpfendorfer, C.A. Quantitative analysis of aggregation behavior in juvenile blacktip sharks. Marine Biology 147, 1239–1249 (2005). https://doi.org/10.1007/s00227-005-0004-7
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DOI: https://doi.org/10.1007/s00227-005-0004-7