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Quantification Of Massive Seasonal Aggregations Of Blacktip Sharks (Carcharhinus Limbatus) In Southeast Florida

S. M. Kajiura, S. Tellman
Published 2016 · Medicine, Geography

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Southeast Florida witnesses an enormous seasonal influx of upper trophic level marine predators each year as massive aggregations of migrating blacktip sharks (Carcharhinus limbatus) overwinter in nearshore waters. The narrow shelf and close proximity of the Gulf Stream current to the Palm Beach County shoreline drive tens of thousands of sharks to the shallow, coastal environment. This natural bottleneck provides a unique opportunity to estimate relative abundance. Over a four year period from 2011–2014, an aerial survey was flown approximately biweekly along the length of Palm Beach County. A high definition video camera and digital still camera mounted out of the airplane window provided a continuous record of the belt transect which extended 200 m seaward from the shoreline between Boca Raton Inlet and Jupiter Inlet. The number of sharks within the survey transect was directly counted from the video. Shark abundance peaked in the winter (January-March) with a maximum in 2011 of 12,128 individuals counted within the 75.6 km-2 belt transect. This resulted in a maximum density of 803.2 sharks km-2. By the late spring (April-May), shark abundance had sharply declined to 1.1% of its peak, where it remained until spiking again in January of the following year. Shark abundance was inversely correlated with water temperature and large numbers of sharks were found only when water temperatures were less than 25°C. Shark abundance was also correlated with day of the year but not with barometric pressure. Although shark abundance was not correlated with photoperiod, the departure of the sharks from southeast Florida occurred around the vernal equinox. The shark migration along the United States eastern seaboard corresponds spatially and temporally with the spawning aggregations of various baitfish species. These baseline abundance data can be compared to future studies to determine if shark population size is changing and if sharks are restricting their southward migration as global water temperatures increase.
This paper references
Extinction risk and conservation of the world’s sharks and rays
N. Dulvy (2014)
Aerial survey as a tool to estimate whale shark abundance trends
D. Rowat (2009)
Cascading Effects of the Loss of Apex Predatory Sharks from a Coastal Ocean
R. Myers (2007)
The Gulf-Stream
W. Carpenter (1870)
NMFS cooperative tagging program, 1962–1993: an atlas of shark tag and recapture data
NE Kohler (1998)
Predicted habitat shifts of Pacific top predators in a changing climate
E. Hazen (2013)
Aggregation behavior and seasonal philopatry in male and female leopard sharks Triakis semifasciata along the open coast of southern California, USA
Andrew P. Nosal (2014)
Warming up, turning sour, losing breath: ocean biogeochemistry under global change
N. Gruber (2011)
Problems Associated with the Identification and Separation of the Spinner Shark, Carcharhinus brevipinna, and the Blacktip Shark, Carcharhinus limbatus
Steven A. Branstetter (1982)
FAO Species catalog, vol 4, part 1 and 2: Sharks of the world: an annotated and illustrated catalogue of shark species known to date. FAO fisheries synopsis 125
Compagno LJV (1984)
Influence of environmental factors on shark and ray movement, behaviour and habitat use: a review
Audrey M Schlaff (2014)
Deep danger: intra-specific predation risk influences habitat use and aggregation formation of juvenile lemon sharks Negaprion brevirostris
T. Guttridge (2012)
Patterns of activity and space utilization of lemon sharks, Negaprion brevirostris, in a shallow Bahamian lagoon
S. H. Gruber (1988)
The Pace of Shifting Climate in Marine and Terrestrial Ecosystems
M. Burrows (2011)
Putative Mating Behavior in Basking Sharks off the Nova Scotia Coast
C. J. Harvey-Clark (1999)
HMS commercial compliance guide: Guide for complying with the Atlantic tunas, swordfish, shark, and billfish regulations
Anonymous (2015)
Signature of ocean warming in global fisheries catch
W. Cheung (2013)
part 1 and 2: Sharks of the world: an annotated and illustrated catalogue of shark species known to date. FAO fisheries synopsis 125. Rome: FAO
Ljv Compagno (1984)
Sharks and Rays of Australia, 2nd Edition [Book Review]
Fiona Maxwell (2009)
Sharks of the world : an annotated and illustrated catalogue of shark species known to date
L. Compagno (1984)
Northeast Atlantic (Including Mediterranean and Black Sea)
P Walker (2005)
Preliminary analyses of Atlantic menhaden, Brevoortia tyrannus, migrations, population structure, survival and exploitation rates, and availability as indicated from tag returns
RL Dryfoos (1973)
Basking sharks (Cetorhinus maximus) schooling in the southern Gulf of Maine
S. G. Wilson (2004)
Carcharhinus limbatus. The IUCN Red List of Threatened Species 2009: e. T3851A10124862
GH Burgess (2009)
Elevated body temperatures of adult female leopard sharks, Triakis semifasciata, while aggregating in shallow nearshore embayments: Evidence for behavioral thermoregulation?
Barbara V. Hight (2007)
Heat-seeking sharks: support for behavioural thermoregulation in reef sharks
C. W. Speed (2012)
Long-term movements, migration, and temporal delineation of summer nurseries for juvenile sandbar sharks in the Chesapeake Bay region
R D Grubbs
Regional Overview. Northeast Atlantic (Including Mediterranean and Black Sea)
P Walker (2005)
Estimation of Detection Probability in Manatee Aerial Surveys at a Winter Aggregation Site
H. H. Edwards (2007)
Changes in Relative Occurrence of Cetaceans in the Southern California Bight: A Comparison of Recent Aerial Survey Results with Historical Data Sources
Mari Ann Smultea (2014)
Seasonal abundance of hammerhead sharks of Cape Canaveral
R D Jennings (1985)
Shark distributions off the northeast United States frommarine mammal surveys. Copeia
RD Kenney (1985)
High apex predator biomass on remote Pacific islands
C. Stevenson (2006)
IUCN Red List of Threatened Species
J. Ragle (2010)
Ultralight aircraft surveys reveal marine turtle population increases along the west coast of Reunion Island
Claire Jean (2010)
Global catches, exploitation rates, and rebuilding options for sharks
B. Worm (2013)
Spatial and temporal movement patterns of a multi-species coastal reef shark aggregation
C. W. Speed (2011)
Biology of the blacktip shark, Carcharhinus limbatus, off the Southeastern United States
J. I. Castro (1996)
Sizing up the ecological role of sharks as predators
M. Heupel (2014)
Seasonal abundance of hammer-head sharks off Cape Canaveral, Florida
Randy D. Jennings (1985)
The small-scale shark fisheries in the southern Gulf of Mexico: Understanding their heterogeneity to improve their management
J C Pérez-Jiménez (2015)
Fishery of elasmobranchs with some observations on the biology and stock assessment of Carcharhinus limbatus (P. Muller & Henle, 1839) exploited along Malabar coast
P. Manojkumar (2012)
Recent strandings and sightings of whale sharks in South Africa
L. Beckley (2004)
Drivers of Daily Routines in an Ectothermic Marine Predator: Hunt Warm, Rest Warmer?
Y. Papastamatiou (2015)
Sharks, rays and chimaeras : the status of the chondrichthyan fishes
G. Burgess (2005)
A hook and line survey of the sharks found within five hundred meters of shore along Melbourne Beach, Brevard County, Florida
JW Dodrill (1977)
Fishes of the Western North Atlantic
G. A. Steven (1949)
Projected ocean warming creates a conservation challenge for river herring populations
P. Lynch (2015)
Monitoring seabirds population in marine ecosystem: The use of strip-transect aerial surveys
G. Certain (2008)
Aerial survey of Atlantic walruses (Odobenus rosmarus rosmarus) in the Pechora Sea, August 2011
Christian Lydersen (2012)
Size distributions and sex ratios of sharks caught by Oman's artisanal fishery
A. Henderson (2009)
Influence of the annual sardine run on catches of large sharks in the protective gillnets off KwaZulu-Natal, South Africa, and the occurrence of sardine in shark diet
Sheldon F. Dudley (2010)
Charles H. Peterson (1976)
Big fish in shallow water; use of an intertidal surf-zone habitat by large-bodied teleosts and elasmobranchs in tropical northern Australia
A. Tobin (2013)
Unique Sequence of Events Triggers Manta Ray Feeding Frenzy in the Southern Great Barrier Reef, Australia
S. Weeks (2015)
Aerial census of whale sharks (Rhincodon typus) on the northern KwaZulu-Natal coast, South Africa
G. Cliff (2007)
The Gulf Stream. London: Cassell
T F Gaskell (1972)
An Unprecedented Aggregation of Whale Sharks, Rhincodon typus, in Mexican Coastal Waters of the Caribbean Sea
R. de la Parra Venegas (2011)
Abundance and distribution of whale sharks (Rhincodon typus) in the northern Gulf of Mexico
Carolyn Burks (2006)
Aerial surveys for sea turtles in North Carolina inshore waters
S. Epperly (1994)
Collapse and Conservation of Shark Populations in the Northwest Atlantic
J. Baum (2003)
A) preliminary evaluation of the status of shark species
J. I. Castro (1999)
The Sharks of North America
J. I. Castro (2011)
Shark nursery grounds of the Gulf of Mexico and the East Coast waters of the United States : proceedings of the symposium, Shark Essential Fish Habitat: Towards Ecosystem Management, held in Baltimore Maryland, USA, 19 August 2002
C. T. McCandless (2007)
A massive school of cownose rays, Rhinoptera bonasus (Rhinopteridae), in lower Chesapeake Bay, Virginia
Robert A. Blaylock (1989)
Sharks and Rays of Australia
J. Stevens (1991)
Whale sharks Rhincodon typus aggregate to feed on fish spawn in Belize
W. Heyman (2001)
Sharks on the line: a state-by-state analysis of sharks and their fisheries
M. Camhi (1998)
Water temperature and the migrations of American shad
W. C. Leggett (1972)
A massive surgeonfish aggregation creates a unique opportunity for reef sharks
O. C. Weideli (2015)
Seasonal residency, habitat use, and site fidelity of juvenile sand tiger sharks Carcharias taurus in a Massachusetts estuary
Jeff Kneebone (2012)
A hook and line survey of the sharks found within five hundred meters of shore along Melbourne Beach
J W Dodrill (1977)
Towards better management of Australia’s shark fishery: genetic analyses reveal unexpected ratios of cryptic blacktip species Carcharhinus tilstoni and C. limbatus
Jennifer R Ovenden (2010)
Shark distributions off the northeast United States from marine mammal surveys
R. D. Kenney (1985)
The Average Distribution of Volume Transport and Potential Vorticity with Temperature at Three Sections across the Gulf Stream
K. Leaman (1989)
Cascading top-down effects of changing oceanic predator abundances.
J. Baum (2009)
The Biology of Tiger Sharks, Galeocerdo Cuvier, in Shark Bay, Western Australia: Sex Ratio, Size Distribution, Diet, and Seasonal Changes in Catch Rates
M. Heithaus (2004)
Aerial survey abundance estimates of the loggerhead sea turtle Caretta caretta in the Pelagos Sanctuary, northwestern Mediterranean Sea
G. Lauriano (2011)
Seasonal occurrence, distribution and movements of the whale shark, Rhincodon typus, at Ningaloo Reef, Western Australia
J. Taylor (1996)
Fishes of the Western North Atlantic. Part One. Lancelets, Cyclostomes, Sharks
C. Hubbs (1949)
Climate Change and Distribution Shifts in Marine Fishes
Allison L. Perry (2005)
Rafael Tavares (2009)
Massive aggregations of large rays and sharks In and near Sarasota, Florida
E. Clark (1963)
The trade in sharks and shark products in India: a preliminary study
F Hanfee (1996)
Commercial shark fishery observer program 1996. Tampa: Gulf and South Atlantic Fisheries Development Program
S Branstetter (1997)
The trade in sharks and shark products in India: a preliminary study. In: TheWorld Trade in Sharks: a Compendium of TRAFFIC's regional studies
F. Hanfee (1996)

This paper is referenced by
Distribution and community structure of First Coast shark assemblages and their relative trophic niche dynamics
Clark Morgan (2018)
Philopatry and Regional Connectivity of the Great Hammerhead Shark, Sphyrna mokarran in the U.S. and Bahamas
T. Guttridge (2017)
Factors shaping the co-occurrence of two juvenile shark species along the Texas Gulf Coast
P. Matich (2017)
Seasonal Movements and Habitat Use of Juvenile Smooth Hammerhead Sharks in the Western North Atlantic Ocean and Significance for Management
Ryan K Logan (2020)
Defining Sex-Specific Habitat Suitability for a Northern Gulf of Mexico Shark Assemblage
J M Drymon (2020)
Microbial Community Richness Distinguishes Shark Species Microbiomes in South Florida
Rachael Karns (2017)
Thermal Imaging Reveals Changes in Body Surface Temperatures of Blacktip Sharks (Carcharhinus limbatus) during Air Exposure.
Natascha Wosnick (2018)
Partial migration of the nurse shark, Ginglymostoma cirratum (Bonnaterre), from the Dry Tortugas Islands
Harold Pratt (2017)
Blacktip shark Carcharhinus limbatus presence at fishing piers in South Carolina: association and environmental drivers.
Kelsey L Martin (2019)
Thermal performance responses in free-ranging elasmobranchs depend on habitat use and body size
Karissa O. Lear (2019)
Seasonal occurrence, relative abundance, and migratory movements of juvenile sandbar sharks, Carcharhinus plumbeus, in Winyah Bay, South Carolina
Caroline M Collatos (2020)
Effects of EMF emissions from undersea electric cables on coral reef fish.
Audie Kirk Kilfoyle (2018)
e(lasmo)DNA : the role of environmental DNA (eDNA) analysis in marine fish biodiversity assessment, with special focus on elasmobranchs
Judith Bakker (2018)
Diverseresource-usestrategies ina large-bodied marinepredatorguild : evidencefromdifferentialuseof resourcesubsidiesandintraspecific isotopicvariation
Oliver N Shipley (2019)
Delineation and mapping of coastal shark habitat within a shallow lagoonal estuary
Charles W Bangley (2018)
Habitat Use of Blacktip Sharks (Carcharhinus limbatus) at Fishing Piers
Kelsey L. Spencer (2017)
Evolution of Schooling Behavior in Fish
A. Kasumyan (2018)
Urban manta rays: potential manta ray nursery habitat along a highly developed Florida coastline
Jessica H. Pate (2020)
Using unmanned aerial vehicle (UAV) surveys and image analysis in the study of large surface-associated marine species: a case study on reef sharks Carcharhinus melanopterus shoaling behaviour.
Guillaume Rieucau (2018)
Adult blacktip sharks (Carcharhinus limbatus) use shallow water as a refuge from great hammerheads (Sphyrna mokarran).
Melanie D Doan (2020)
Life history of the common blacktip shark, Carcharhinus limbatus, from central eastern Australia and comparative demography of a cryptic shark complex
A. Harry (2019)
Spatial ecology of a top-order marine predator, the tiger shark (Galeocerdo cuvier)
L. C. Ferreira (2017)
Exposure to Sunlight Affects the Body Temperatures of Sharks
N. Wosnick (2020)
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