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- Title
ESTIMATION OF DENSITY AND ABUNDANCE OF THE BLUE LAND CRAB, CARDISOMA GUANHUMI LATREILLE, 1828, IN THE IMBURANA PENINSULA, NORTHERN BRAZIL.
- Authors
MENDES, LUCIANA DO N.; CRUZ, RAUL
- Abstract
The blue land crab (Cardisoma guanhumi Latreille, 1828) supports extensive small-scale artisanal fisheries in the tropical western Atlantic, including Brazil. Land surveys were conducted on a peninsula in a northeastern Brazilian estuary in 2014-2015 in order to evaluate density and abundance. The study area (26 700 m²) was dividied into three subareas with a total of 30 sampling points. In all, 529 burrows were registered of which 71.7% were open (indicating activity), 22.1% were closed (indicating moulting) and 6.2% were empty (fishermen catch). Burrow diameter ranged from 12 to 174 mm (mean: 62.05 ± 3.01 mm; 95% confidence interval). The highly significant correlation between mean burrow diameter and mean carapace length (n = 7; R² = 0.8968, p<0.001) shows that one is a good proxy for the other. The estimated total population size in the study area was 10 362 individuals, with a mean density of 0.39 individuals/m² (stock of 7347 kg).
- Subjects
BRAZIL; CARDISOMA guanhumi; SMALL-scale aquaculture; ESTUARIES; STATISTICAL sampling
- Publication
Crustaceana, 2017, Vol 90, Issue 5, p571
- ISSN
0011-216X
- Publication type
Article
- DOI
10.1163/15685403-00003673