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Title: Control of shell-boring polychaetes in Haliotis tuberculata coccinea (Reeve 1846) aquaculture: Species identification and effectiveness of Mebendazole
Authors: Bilbao Villena, Amaia 
Núñez, Jorge 
Viera, Mara Del Pino
Sosa, Beatriz
Fernández-Palacios, Hipólito 
Hernández-Cruz, Carmen María 
UNESCO Clasification: 251092 Acuicultura marina
Keywords: Abalone
Haliotis tuberculata coccinea
Polydora sp.
Issue Date: 2011
Publisher: 0730-8000
Journal: Journal of Shellfish Research 
Abstract: The experimental culture of Haliotis tuberculata coccinea is carried out at the Institute of Marine Science of Canary Islands (Gran Canaria, Spain) based on specimens captured in their natural habitat and conditioned as broodstock. In 2008, an outbreak of shell-boring polychaetes affected the culture. This study aims to identify some of the species of shell-boring polychaetes that affect H. tuberculata coccinea and, second, to assess the effectiveness of multiple mebendazole applications for the control of these pests. Mebendazole was applied as baths of Lomper (Esteve Laboratory, Barcelona, Spain) using the concentrations 6 mL/L, 8 mL/L, and 10 mL/L, with 0 mL/L as a control measure. Abalone were exposed to 3 mebendazole baths over a 3-day period (1× 3-h bath applied for 3 consecutive days), as recommended in the drug directions for human use. After each bath, the abalone were returned to their original culture tanks until the following day. After these 3 days, the abalone were kept in their original culture tanks for a term of 1 mo. Each month, as a result of the effect of mebendazole, moribund and/or dead polychaetes became detached from the burrows and were found at the bottom of the tank during the first 15 days after the baths of mebendazole were applied. The polychaetes expelled from the shells were counted, collected, and fixed in 10% buffered formaldehyde for subsequent identification. This process was repeated month after month until no moribund and/or dead shell-boring polychaetes were found after the application of the baths of mebendazole. The shell-boring polychaete species was identified as Polydora hoplura (Claparède 1870). The efficacy rate of Lomper was around 99% in all the concentrations tested when it was applied during a 7-mo term (each month, 1 bath was applied for 3 consecutive days), and abalone mortality was limited to highly infested animals only. Monitoring of abalone weight gain suggested that the mebendazole treatments did not affect growth significantly during the study period.
ISSN: 0730-8000
DOI: 10.2983/035.030.0219
Source: Journal of Shellfish Research [ISSN 0730-8000],v. 30(2), p. 331-336
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