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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

Life cycle of the marine leech (Zeylanicobdella arugamensis) isolated from sea bass (Lates calcarifer) under laboratory conditions  [2010]

Kua, Beng Chu; Azmi, Muhammad Azizol; Hamid, Noor Khalidah Abdul;

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Infestation of unidentified marine leeches in Malaysia was first reported in 1988 in grouper (Epinephelus coioides) cultured in floating cages with a prevalence of 0.4%. Recently (2004-2006), the marine leech Zeylanicobdella arugamensis was regularly isolated from marine fish cultured in cages. In May 2006, approximately 60% of moribund sea bass fingerlings reared in cages were infected with Zeylanicobdella arugamensis, which may also serve as a vector for the bacteria, Vibrio alginolyticus. The aim of the present study was to determine the life cycle of Z. arugamensis under laboratory conditions. A total of 105 adult leeches, 4.5-14.0mm in length, from five trial experiments were sampled and brought to the laboratory. Leeches with average size exceeding 10.00mm could deposit cocoons after 5-8h of isolation. Seven days were needed for the new egg inside the cocoon to develop into juvenile under 27°C at 28ppt. It took another 9 to 10days for the juvenile leeches to grow to mature adults. Overall, the Z. arugamensis took 16 to 17days to mature. In the present study, we observed that a single leech can reproduce and this self-fertilization or direct fertilization has never been reported in a piscicolid leech.
From the journal
Aquaculture
ISSN : 0044-8486

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
302
Issue:
3-4
Start Page:
153
End Page:
157
Publisher:
Amsterdam: Elsevier Science
All titles:
"Life cycle of the marine leech (Zeylanicobdella arugamensis) isolated from sea bass (Lates calcarifer) under laboratory conditions"@eng
Other:
"Includes references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
302
Issue:
3-4
Start Page:
153
End Page:
157
Publisher:
Amsterdam: Elsevier Science
All titles:
"Life cycle of the marine leech (Zeylanicobdella arugamensis) isolated from sea bass (Lates calcarifer) under laboratory conditions"@eng
Other:
"Includes references"