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McDaniel, Carrie J; Duke University Marine Laboratory; cjmcdaniel@hotmail.com; Crowder, Larry B; Duke University Marine Laboratory; lcrowder@duke.edu; Priddy, Jeffery A; Duke University Marine Laboratory; jpriddy@duke.edu. |
In order to examine the scientific feasibility of area closures for sea turtle protection, we determined the spatial dynamics of sea turtles for the U.S. Gulf of Mexico by analyzing National Marine Fisheries Service (NMFS) aerial survey data in September, October, and November of 1992, 1993, and 1994. Turtle sightings were grouped into depth zones and NMFS fishery statistical zones, and strip transect methods were used to estimate the relative abundance of sea turtles in each subzone. Average shrimping intensity was calculated for each subzone for all months of 1992, 1993, and 1994, as well as for the months and locations of the aerial survey. The spatial overlap of sea turtle abundance and shrimping intensity suggested regions where interactions are... |
Tipo: Peer-Reviewed Reports |
Palavras-chave: Density estimates; Endangered species; GIS; Gulf of Mexico; Kemp's ridley; Management; Sea turtles; Shrimp fishing; Spatial dynamics; Strip transect methods. |
Ano: 2000 |
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Tudesco,Caroline Cabral; Fernandes,Laís Pinho; Di Beneditto,Ana Paula Madeira. |
This study provides the first data on the population structure of swimming crab Callinectes ornatus Ordway, 1863 bycatch from coastal shrimp fishing in northern Rio de Janeiro State, Brazil (21º 30'-21º 50' S and 41º 05'-41º 07' W). Crabs were collected monthly from April 2006 to March 2007. A total of 5,611 specimens were analyzed, of which 3,951 were males and 1,660 ovigerous and non-ovigerous females. The overall sex ratio (2:1) differ significantly from the expected 1:1 proportion, being the mature males significantly predominant as bycatch in this fishery. The specimens' carapace width and weight varied from 27 to 126 mm (mean: 77.3 ± 12.3 mm) and 1.2 to 128.2 g (mean: 31.0 ± 14.4 g) for males, and 30 to 101 mm (mean: 63.4 ± 9.3 mm) and 1.7 to 66.0 g... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crab; Bycatch; Shrimp fishing; Southeastern Brazil; South Atlantic ocean. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100007 |
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