Habitat use and demographic population structure of elasmobranchs at a Caribbean atoll (Glover's Reef, Belize)

Ellen K. Pikitch, Demian D. Chapman, Elizabeth A Babcock, Mahmood S. Shivji

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

A 5 yr spring and summer survey (July 2000 to May 2004) of the elasmobranch fauna of Glover's Reef Marine Reserve, Belize, documents the use of this oceanic atoll by at least 12 elasmobranch species, including early life-stages of nurse sharks Ginglymostoma cirratum, Caribbean reef sharks Carcharhinus perezi, lemon sharks Negaprion brevirostris, and southern stingrays Dasyatis americana. Elasmobranch abundance was sampled in 3 atoll macrohabitats (deep lagoon, ocean reef, shallow lagoon) using standardized longlines. Total elasmobranch abundance did not change from year to year, but was significantly higher inside the lagoon than on the ocean reef outside the atoll. G. cirratum dominated both shallow and deep lagoon catches, with smaller individuals more prevalent in the shallow lagoon. C. perezi of all size classes dominated the ocean reef catches, but small juveniles of this species were also common in the deep lagoon. This species rarely utilized the shallow lagoon. A wide range of sizes of C. perezi and G. cirratum occupy Glover's Reef in spring and summer, with males maturing at 150 to 170 cm and 185 to 200 cm total length, respectively. The sex ratios of these species did not deviate from unity. A large juvenile Galápagos shark, C. galapagensis, was collected on the ocean reef, extending the range of this species into the Western Caribbean. Opportunistic surveys of fish markets on the Belize mainland revealed that inshore areas are utilized by early life-stages of sharks from the families Carcharhinidae (C. limbatus, N. brevirostris, Rhizoprionodon porosus) and Sphyrnidae (Sphyrna tiburo, S. lewini, S. mokarran).

Original languageEnglish
Pages (from-to)187-197
Number of pages11
JournalMarine Ecology Progress Series
Volume302
StatePublished - Nov 4 2005

Fingerprint

Belize
atoll
habitat use
population structure
Ginglymostoma cirratum
reefs
lagoon
reef
demographic statistics
shark
Negaprion brevirostris
habitats
Dasyatis americana
oceans
sharks
ocean
Carcharhinidae
Sphyrnidae
Sphyrna
Carcharhinus

Keywords

  • Batoid
  • Habitat partitioning
  • Marine reserve
  • Mesoamerican Barrier Reef
  • Shark

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology

Cite this

Habitat use and demographic population structure of elasmobranchs at a Caribbean atoll (Glover's Reef, Belize). / Pikitch, Ellen K.; Chapman, Demian D.; Babcock, Elizabeth A; Shivji, Mahmood S.

In: Marine Ecology Progress Series, Vol. 302, 04.11.2005, p. 187-197.

Research output: Contribution to journalArticle

@article{0cecacdb31d44623922173d1acf1fd01,
title = "Habitat use and demographic population structure of elasmobranchs at a Caribbean atoll (Glover's Reef, Belize)",
abstract = "A 5 yr spring and summer survey (July 2000 to May 2004) of the elasmobranch fauna of Glover's Reef Marine Reserve, Belize, documents the use of this oceanic atoll by at least 12 elasmobranch species, including early life-stages of nurse sharks Ginglymostoma cirratum, Caribbean reef sharks Carcharhinus perezi, lemon sharks Negaprion brevirostris, and southern stingrays Dasyatis americana. Elasmobranch abundance was sampled in 3 atoll macrohabitats (deep lagoon, ocean reef, shallow lagoon) using standardized longlines. Total elasmobranch abundance did not change from year to year, but was significantly higher inside the lagoon than on the ocean reef outside the atoll. G. cirratum dominated both shallow and deep lagoon catches, with smaller individuals more prevalent in the shallow lagoon. C. perezi of all size classes dominated the ocean reef catches, but small juveniles of this species were also common in the deep lagoon. This species rarely utilized the shallow lagoon. A wide range of sizes of C. perezi and G. cirratum occupy Glover's Reef in spring and summer, with males maturing at 150 to 170 cm and 185 to 200 cm total length, respectively. The sex ratios of these species did not deviate from unity. A large juvenile Gal{\'a}pagos shark, C. galapagensis, was collected on the ocean reef, extending the range of this species into the Western Caribbean. Opportunistic surveys of fish markets on the Belize mainland revealed that inshore areas are utilized by early life-stages of sharks from the families Carcharhinidae (C. limbatus, N. brevirostris, Rhizoprionodon porosus) and Sphyrnidae (Sphyrna tiburo, S. lewini, S. mokarran).",
keywords = "Batoid, Habitat partitioning, Marine reserve, Mesoamerican Barrier Reef, Shark",
author = "Pikitch, {Ellen K.} and Chapman, {Demian D.} and Babcock, {Elizabeth A} and Shivji, {Mahmood S.}",
year = "2005",
month = "11",
day = "4",
language = "English",
volume = "302",
pages = "187--197",
journal = "Marine Ecology - Progress Series",
issn = "0171-8630",
publisher = "Inter-Research",

}

TY - JOUR

T1 - Habitat use and demographic population structure of elasmobranchs at a Caribbean atoll (Glover's Reef, Belize)

AU - Pikitch, Ellen K.

AU - Chapman, Demian D.

AU - Babcock, Elizabeth A

AU - Shivji, Mahmood S.

PY - 2005/11/4

Y1 - 2005/11/4

N2 - A 5 yr spring and summer survey (July 2000 to May 2004) of the elasmobranch fauna of Glover's Reef Marine Reserve, Belize, documents the use of this oceanic atoll by at least 12 elasmobranch species, including early life-stages of nurse sharks Ginglymostoma cirratum, Caribbean reef sharks Carcharhinus perezi, lemon sharks Negaprion brevirostris, and southern stingrays Dasyatis americana. Elasmobranch abundance was sampled in 3 atoll macrohabitats (deep lagoon, ocean reef, shallow lagoon) using standardized longlines. Total elasmobranch abundance did not change from year to year, but was significantly higher inside the lagoon than on the ocean reef outside the atoll. G. cirratum dominated both shallow and deep lagoon catches, with smaller individuals more prevalent in the shallow lagoon. C. perezi of all size classes dominated the ocean reef catches, but small juveniles of this species were also common in the deep lagoon. This species rarely utilized the shallow lagoon. A wide range of sizes of C. perezi and G. cirratum occupy Glover's Reef in spring and summer, with males maturing at 150 to 170 cm and 185 to 200 cm total length, respectively. The sex ratios of these species did not deviate from unity. A large juvenile Galápagos shark, C. galapagensis, was collected on the ocean reef, extending the range of this species into the Western Caribbean. Opportunistic surveys of fish markets on the Belize mainland revealed that inshore areas are utilized by early life-stages of sharks from the families Carcharhinidae (C. limbatus, N. brevirostris, Rhizoprionodon porosus) and Sphyrnidae (Sphyrna tiburo, S. lewini, S. mokarran).

AB - A 5 yr spring and summer survey (July 2000 to May 2004) of the elasmobranch fauna of Glover's Reef Marine Reserve, Belize, documents the use of this oceanic atoll by at least 12 elasmobranch species, including early life-stages of nurse sharks Ginglymostoma cirratum, Caribbean reef sharks Carcharhinus perezi, lemon sharks Negaprion brevirostris, and southern stingrays Dasyatis americana. Elasmobranch abundance was sampled in 3 atoll macrohabitats (deep lagoon, ocean reef, shallow lagoon) using standardized longlines. Total elasmobranch abundance did not change from year to year, but was significantly higher inside the lagoon than on the ocean reef outside the atoll. G. cirratum dominated both shallow and deep lagoon catches, with smaller individuals more prevalent in the shallow lagoon. C. perezi of all size classes dominated the ocean reef catches, but small juveniles of this species were also common in the deep lagoon. This species rarely utilized the shallow lagoon. A wide range of sizes of C. perezi and G. cirratum occupy Glover's Reef in spring and summer, with males maturing at 150 to 170 cm and 185 to 200 cm total length, respectively. The sex ratios of these species did not deviate from unity. A large juvenile Galápagos shark, C. galapagensis, was collected on the ocean reef, extending the range of this species into the Western Caribbean. Opportunistic surveys of fish markets on the Belize mainland revealed that inshore areas are utilized by early life-stages of sharks from the families Carcharhinidae (C. limbatus, N. brevirostris, Rhizoprionodon porosus) and Sphyrnidae (Sphyrna tiburo, S. lewini, S. mokarran).

KW - Batoid

KW - Habitat partitioning

KW - Marine reserve

KW - Mesoamerican Barrier Reef

KW - Shark

UR - http://www.scopus.com/inward/record.url?scp=28444461511&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28444461511&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:28444461511

VL - 302

SP - 187

EP - 197

JO - Marine Ecology - Progress Series

JF - Marine Ecology - Progress Series

SN - 0171-8630

ER -