Use of natural marks on population estimates of the nurse shark,Ginglymostoma cirratum, at Atol das Rocas Biological Reserve, Brazil

被引：69

作者：

Castro, ALF

Rosa, RS

机构：

[1] Univ S Florida, Dept Biol, Tampa, FL 33620 USA

[2] Univ Fed Paraiba, CCNE, Dept Sistemat & Ecol, BR-58059900 Joao Pessoa, Paraiba, Brazil

来源：

ENVIRONMENTAL BIOLOGY OF FISHES | 2005年 / 72卷 / 02期

关键词：

underwater visual censuses; photo-identification; sighting-resighting; population size; population structure;

D O I：

10.1007/s10641-004-1479-7

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

We assessed information on the population structure of the nurse shark, Ginglymostoma cirratum, at Atol das Rocas, northeastern Brazil, through underwater observations. Based on photographic records of natural distinctive marks for individual recognition, we used probabilistic estimators (Petersen-Bailey and Jolly-Seber) to assess population size. We found that 46% of the sharks (194 individuals) had distinctive marks. The population size was estimated in 368 individuals, using the Petersen-Bailey estimator, and 339 individuals using the Jolly-Seber estimator.

引用

页码：213 / 221

页数：9

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