Commercial trials using emamectin benzoate to control sea lice Lepeophtheirus salmonis infestations in Atlantic salmon Salmo salar
Two trials were conducted at commercial salmon farms to evaluate the efficacy of emamectin benzoate (Slice, 0.2% aquaculture pre-mix, Schering-Plough Animal Health) as a treatment for sea lice Lepeophtheirus salmonis (Krøyer) and Caligus elongatus Nordmann infestations in Atlantic salmon Salmo salar...
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Veröffentlicht in: | Diseases of aquatic organisms 2000-06, Vol.41 (2), p.141-149 |
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description | Two trials were conducted at commercial salmon farms to evaluate the efficacy of emamectin benzoate (Slice, 0.2% aquaculture pre-mix, Schering-Plough Animal Health) as a treatment for sea lice Lepeophtheirus salmonis (Krøyer) and Caligus elongatus Nordmann infestations in Atlantic salmon Salmo salar L. Trials were carried out in 15 m2 commercial sea pens, at temperatures of 5.5 to 7.5 degrees C and 10.8 to 13.8 degrees C. Each pen was stocked with 14,000 to 17,500 fish with mean weights of 0.44 to 0.74 and 1.33 to 1.83 kg. Fish were naturally infested with sea lice at the start of each trial. At Day -1, samples of 10 or 15 fish were taken from each pen to determine pre-treatment numbers of lice. Emamectin benzoate was administered in feed, to 4 replicate pens, at a dose of 50 micrograms kg-1 biomass d-1 for 7 consecutive days (Days 0 to 6). Sea lice were counted again, between Days 7 and 77, and comparisons made with untreated control fish. Despite adverse weather conditions, wide variations in fish weights and exposure to new infestations, treatment was effective against chalimus and motile stages of L. salmonis. In the autumn trial, efficacy at Day 27 was 89%, and lice numbers remained lower on treated fish than on control fish 64 d from the start of treatment. In the winter trial, reductions in lice numbers at low temperatures were slower but good efficacy was achieved by Day 35. Although control fish had to be treated with hydrogen peroxide at Day 21, fish treated only with emamectin benzoate on Days 0 to 6 still had 89% fewer lice than control fish at Day 35. There were very few C. elongatus present, but at the end of both trials numbers were lower on treated fish. No adverse effects were associated with treatment of fish with emamectin benzoate. |
doi_str_mv | 10.3354/dao041141 |
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H ; SOMMERVILLE, C ; RICHARDS, R. H ; VARMA, K. J</creator><creatorcontrib>STONE, J ; SUTHERLAND, I. H ; SOMMERVILLE, C ; RICHARDS, R. H ; VARMA, K. J</creatorcontrib><description>Two trials were conducted at commercial salmon farms to evaluate the efficacy of emamectin benzoate (Slice, 0.2% aquaculture pre-mix, Schering-Plough Animal Health) as a treatment for sea lice Lepeophtheirus salmonis (Krøyer) and Caligus elongatus Nordmann infestations in Atlantic salmon Salmo salar L. Trials were carried out in 15 m2 commercial sea pens, at temperatures of 5.5 to 7.5 degrees C and 10.8 to 13.8 degrees C. Each pen was stocked with 14,000 to 17,500 fish with mean weights of 0.44 to 0.74 and 1.33 to 1.83 kg. Fish were naturally infested with sea lice at the start of each trial. At Day -1, samples of 10 or 15 fish were taken from each pen to determine pre-treatment numbers of lice. Emamectin benzoate was administered in feed, to 4 replicate pens, at a dose of 50 micrograms kg-1 biomass d-1 for 7 consecutive days (Days 0 to 6). Sea lice were counted again, between Days 7 and 77, and comparisons made with untreated control fish. Despite adverse weather conditions, wide variations in fish weights and exposure to new infestations, treatment was effective against chalimus and motile stages of L. salmonis. In the autumn trial, efficacy at Day 27 was 89%, and lice numbers remained lower on treated fish than on control fish 64 d from the start of treatment. In the winter trial, reductions in lice numbers at low temperatures were slower but good efficacy was achieved by Day 35. Although control fish had to be treated with hydrogen peroxide at Day 21, fish treated only with emamectin benzoate on Days 0 to 6 still had 89% fewer lice than control fish at Day 35. There were very few C. elongatus present, but at the end of both trials numbers were lower on treated fish. No adverse effects were associated with treatment of fish with emamectin benzoate.</description><identifier>ISSN: 0177-5103</identifier><identifier>EISSN: 1616-1580</identifier><identifier>DOI: 10.3354/dao041141</identifier><identifier>PMID: 10918982</identifier><identifier>CODEN: DAOREO</identifier><language>eng</language><publisher>Oldendorf: Inter-Research</publisher><subject>Animal aquaculture ; Animal productions ; Animals ; Biological and medical sciences ; Crustacea ; Ectoparasitic Infestations - prevention & control ; Ectoparasitic Infestations - veterinary ; Fish Diseases - prevention & control ; Fundamental and applied biological sciences. Psychology ; Insecticides - therapeutic use ; Ivermectin - analogs & derivatives ; Ivermectin - therapeutic use ; Lepeophtheirus salmonis ; Marine ; Pisciculture ; Salmo salar ; Salmo salar - parasitology ; Seasons ; Vertebrate aquaculture</subject><ispartof>Diseases of aquatic organisms, 2000-06, Vol.41 (2), p.141-149</ispartof><rights>2000 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c442t-3e082a33400cf45fcfef43c5192737a99ca24e9b9281673895dd8d854f8d2f923</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,3759,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1463549$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/10918982$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>STONE, J</creatorcontrib><creatorcontrib>SUTHERLAND, I. H</creatorcontrib><creatorcontrib>SOMMERVILLE, C</creatorcontrib><creatorcontrib>RICHARDS, R. H</creatorcontrib><creatorcontrib>VARMA, K. J</creatorcontrib><title>Commercial trials using emamectin benzoate to control sea lice Lepeophtheirus salmonis infestations in Atlantic salmon Salmo salar</title><title>Diseases of aquatic organisms</title><addtitle>Dis Aquat Organ</addtitle><description>Two trials were conducted at commercial salmon farms to evaluate the efficacy of emamectin benzoate (Slice, 0.2% aquaculture pre-mix, Schering-Plough Animal Health) as a treatment for sea lice Lepeophtheirus salmonis (Krøyer) and Caligus elongatus Nordmann infestations in Atlantic salmon Salmo salar L. Trials were carried out in 15 m2 commercial sea pens, at temperatures of 5.5 to 7.5 degrees C and 10.8 to 13.8 degrees C. Each pen was stocked with 14,000 to 17,500 fish with mean weights of 0.44 to 0.74 and 1.33 to 1.83 kg. Fish were naturally infested with sea lice at the start of each trial. At Day -1, samples of 10 or 15 fish were taken from each pen to determine pre-treatment numbers of lice. Emamectin benzoate was administered in feed, to 4 replicate pens, at a dose of 50 micrograms kg-1 biomass d-1 for 7 consecutive days (Days 0 to 6). Sea lice were counted again, between Days 7 and 77, and comparisons made with untreated control fish. Despite adverse weather conditions, wide variations in fish weights and exposure to new infestations, treatment was effective against chalimus and motile stages of L. salmonis. In the autumn trial, efficacy at Day 27 was 89%, and lice numbers remained lower on treated fish than on control fish 64 d from the start of treatment. In the winter trial, reductions in lice numbers at low temperatures were slower but good efficacy was achieved by Day 35. Although control fish had to be treated with hydrogen peroxide at Day 21, fish treated only with emamectin benzoate on Days 0 to 6 still had 89% fewer lice than control fish at Day 35. There were very few C. elongatus present, but at the end of both trials numbers were lower on treated fish. No adverse effects were associated with treatment of fish with emamectin benzoate.</description><subject>Animal aquaculture</subject><subject>Animal productions</subject><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Crustacea</subject><subject>Ectoparasitic Infestations - prevention & control</subject><subject>Ectoparasitic Infestations - veterinary</subject><subject>Fish Diseases - prevention & control</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Insecticides - therapeutic use</subject><subject>Ivermectin - analogs & derivatives</subject><subject>Ivermectin - therapeutic use</subject><subject>Lepeophtheirus salmonis</subject><subject>Marine</subject><subject>Pisciculture</subject><subject>Salmo salar</subject><subject>Salmo salar - parasitology</subject><subject>Seasons</subject><subject>Vertebrate aquaculture</subject><issn>0177-5103</issn><issn>1616-1580</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpNkEtrHDEQhEVIsNeOD_kDQYdg8GFstR4z0tEszgMWcohzHrSaVqwwI60lzcE--pd7ll3iXLoo-KguipBPwK6FUPJmsIlJAAnvyApaaBtQmr0nKwZd1yhg4pSclfKXMeBGwQk5BWZAG81X5GWdpgmzC3akNS-30LmE-IfiZCd0NUS6xficbEVaE3Up1pxGWtDSMTikG9xh2j3UBwx5LrTYcUoxFBqix1JtDSnuDb2to401uCNBf-1lb2z-SD745S9eHPWc_P56d7_-3mx-fvuxvt00TkpeG4FMcyuEZMx5qbzz6KVwCgzvRGeNcZZLNFvDNbSd0EYNgx60kl4P3BsuzsnlIXeX0-O8tOunUByOSzFMc-mha7tWQbeAVwfQ5VRKRt_vcphsfuqB9fvB-3-DL-znY-i8nXD4jzwsvABfjoAtzo4-2-hCeeNkuwQa8QqTY4p0</recordid><startdate>20000619</startdate><enddate>20000619</enddate><creator>STONE, J</creator><creator>SUTHERLAND, I. 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J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c442t-3e082a33400cf45fcfef43c5192737a99ca24e9b9281673895dd8d854f8d2f923</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Animal aquaculture</topic><topic>Animal productions</topic><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Crustacea</topic><topic>Ectoparasitic Infestations - prevention & control</topic><topic>Ectoparasitic Infestations - veterinary</topic><topic>Fish Diseases - prevention & control</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Insecticides - therapeutic use</topic><topic>Ivermectin - analogs & derivatives</topic><topic>Ivermectin - therapeutic use</topic><topic>Lepeophtheirus salmonis</topic><topic>Marine</topic><topic>Pisciculture</topic><topic>Salmo salar</topic><topic>Salmo salar - parasitology</topic><topic>Seasons</topic><topic>Vertebrate aquaculture</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>STONE, J</creatorcontrib><creatorcontrib>SUTHERLAND, I. H</creatorcontrib><creatorcontrib>SOMMERVILLE, C</creatorcontrib><creatorcontrib>RICHARDS, R. H</creatorcontrib><creatorcontrib>VARMA, K. 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J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Commercial trials using emamectin benzoate to control sea lice Lepeophtheirus salmonis infestations in Atlantic salmon Salmo salar</atitle><jtitle>Diseases of aquatic organisms</jtitle><addtitle>Dis Aquat Organ</addtitle><date>2000-06-19</date><risdate>2000</risdate><volume>41</volume><issue>2</issue><spage>141</spage><epage>149</epage><pages>141-149</pages><issn>0177-5103</issn><eissn>1616-1580</eissn><coden>DAOREO</coden><abstract>Two trials were conducted at commercial salmon farms to evaluate the efficacy of emamectin benzoate (Slice, 0.2% aquaculture pre-mix, Schering-Plough Animal Health) as a treatment for sea lice Lepeophtheirus salmonis (Krøyer) and Caligus elongatus Nordmann infestations in Atlantic salmon Salmo salar L. Trials were carried out in 15 m2 commercial sea pens, at temperatures of 5.5 to 7.5 degrees C and 10.8 to 13.8 degrees C. Each pen was stocked with 14,000 to 17,500 fish with mean weights of 0.44 to 0.74 and 1.33 to 1.83 kg. Fish were naturally infested with sea lice at the start of each trial. At Day -1, samples of 10 or 15 fish were taken from each pen to determine pre-treatment numbers of lice. Emamectin benzoate was administered in feed, to 4 replicate pens, at a dose of 50 micrograms kg-1 biomass d-1 for 7 consecutive days (Days 0 to 6). Sea lice were counted again, between Days 7 and 77, and comparisons made with untreated control fish. Despite adverse weather conditions, wide variations in fish weights and exposure to new infestations, treatment was effective against chalimus and motile stages of L. salmonis. In the autumn trial, efficacy at Day 27 was 89%, and lice numbers remained lower on treated fish than on control fish 64 d from the start of treatment. In the winter trial, reductions in lice numbers at low temperatures were slower but good efficacy was achieved by Day 35. Although control fish had to be treated with hydrogen peroxide at Day 21, fish treated only with emamectin benzoate on Days 0 to 6 still had 89% fewer lice than control fish at Day 35. There were very few C. elongatus present, but at the end of both trials numbers were lower on treated fish. No adverse effects were associated with treatment of fish with emamectin benzoate.</abstract><cop>Oldendorf</cop><pub>Inter-Research</pub><pmid>10918982</pmid><doi>10.3354/dao041141</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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ispartof | Diseases of aquatic organisms, 2000-06, Vol.41 (2), p.141-149 |
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source | MEDLINE; Inter-Research; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
subjects | Animal aquaculture Animal productions Animals Biological and medical sciences Crustacea Ectoparasitic Infestations - prevention & control Ectoparasitic Infestations - veterinary Fish Diseases - prevention & control Fundamental and applied biological sciences. Psychology Insecticides - therapeutic use Ivermectin - analogs & derivatives Ivermectin - therapeutic use Lepeophtheirus salmonis Marine Pisciculture Salmo salar Salmo salar - parasitology Seasons Vertebrate aquaculture |
title | Commercial trials using emamectin benzoate to control sea lice Lepeophtheirus salmonis infestations in Atlantic salmon Salmo salar |
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