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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Reducing the environmental impact of shark-control programs: a case study from KwaZulu-Natal, South Africa  [2011]

Cliff, Geremy; Dudley, Sheldon F.J.;

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Large-scale shark-control programs at popular beaches in New South Wales and Queensland, Australia, and KwaZulu-Natal (KZN), South Africa, provide protection against shark attack. Although these programs have enhanced bathing safety, reducing the environmental impacts of decades of fishing for large sharks and the associated by-catch remains a challenge. Over the past three decades, there have been several interventions to reduce such impact in the KZN program. The first was the release of all live sharks, including those species known to be responsible for fatal shark attacks. Measures to reduce catches of sharks associated with the winter influx of shoals of sardines, Sardinops sagax, have been increasingly successful. In addition, extensive removal of nets has resulted in a major reduction in effort. Collectively, these initiatives reduced mortalities of sharks by 64%. Baited lines, termed drumlines, were introduced at 18 beaches, where they replaced some of the nets. The former had a far lower by-catch of rays, turtles and cetaceans and significantly lower catches of certain shark species. Replacement of some nets with drumlines is planned for the remaining beaches. Only two attacks, both non-fatal, have occurred at protected beaches in KZN over the past three decades, indicating that the program has maintained its public safety mandate while it has succeeded in reducing its impact on the environment.
From the journal
Marine & freshwater research
ISSN : 1323-1650

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2015
Volume:
62
Issue:
6
Start Page:
700
End Page:
709
Publisher:
CSIRO Publishing
All titles:
"Reducing the environmental impact of shark-control programs: a case study from KwaZulu-Natal, South Africa"@eng
Other:
"Includes references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2015
Volume:
62
Issue:
6
Start Page:
700
End Page:
709
Publisher:
CSIRO Publishing
All titles:
"Reducing the environmental impact of shark-control programs: a case study from KwaZulu-Natal, South Africa"@eng
Other:
"Includes references"