Population structure and reproductive biology of the smalltail shark (Carcharhinus porosus) off Maranhão (Brazil)
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چکیده
منابع مشابه
Reproduction of the blacknose shark (Carcharhinus acronotus) in coastal waters off northeastern Brazil
E-mail address (for F. Hazin): [email protected] depths between 5 and 10 m. Bottom longlines consisted of a multifilament mainline (6 mm in diameter) with up to 100 secondary lines, each approx. 5 m in length and constructed from 3-mm diameter monofilament attached to a wire snood (1 m in length). Types of hooks varied among brands, but rela tive sizes (i.e. 9/0) remained similar.The mai...
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Understanding the ecological factors that regulate elasmobranch abundance in nearshore waters is essential to effectively manage coastal ecosystems and promote conservation. However, little is known about elasmobranch populations in the western South Atlantic Ocean. An 8-year, standardized longline and drumline survey conducted in nearshore waters off Recife, northeastern Brazil, allowed us to ...
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From February 2005 to September 2007, a total of 490 crocodile sharks Pseudocarcharias kamoharai, caught as by-catch in the swordfish and tuna longline fishery that operates in the tropical western Atlantic Ocean, was studied in regard to their reproductive biology. Maximum observed total lengths (L(T)) were 1220 and 1090 mm for females and males respectively, with a high proportion of the catc...
متن کاملRegional movements of the tiger shark, Galeocerdo cuvier, off Northeastern Brazil: inferences regarding shark attack hazard.
An abnormally high shark attack rate verified off Recife could be related to migratory behavior of tiger sharks. This situation started after the construction of the Suape port to the south of Recife. A previous study suggested that attacking sharks could be following northward currents and that they were being attracted shoreward by approaching vessels. In this scenario, such northward movemen...
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ژورنال
عنوان ژورنال: Marine and Freshwater Research
سال: 1999
ISSN: 1323-1650
DOI: 10.1071/mf98127