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Mapping Emamectin resistance in salmon lice

ABSTRACT: QTL mapping of emamectin benzoate resistance in salmon lice, Lepeophtheirus salmonis (Krøyer 1837)

PROVIDER: PRJEB28746 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	ERR2809791_1.fastq.gz	Fastqsanger.gz
	ERR2809791_2.fastq.gz	Fastqsanger.gz
	ERR2809792_1.fastq.gz	Fastqsanger.gz
	ERR2809792_2.fastq.gz	Fastqsanger.gz
	ERR2809793_1.fastq.gz	Fastqsanger.gz

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Transcriptomic responses to emamectin benzoate in Pacific and Atlantic Canada salmon lice Lepeophtheirus salmonis with differing levels of drug resistance

2014-11-17 | GSE56024 | GEO

Effects of the vertically transmitted microsporidian Facilispora margolisi and the parasiticide emamectin benzoate on salmon lice (Lepeophtheirus salmonis)

Project description:This study investigates transcriptomic responses of Pacific salmon lice, Lepeophtheirus salmonis, to infection with the microsporidian Facilispora margolisi and/or exposure to emamectin benzoate (EMB), an antiparasitic agent commonly used in salmon aquaculture.

2017-08-01 | GSE94692 | GEO

Transcriptomic responses to emamectin benzoate in Pacific and Atlantic Canada salmon lice Lepeophtheirus salmonis with differing levels of drug resistance

Project description:This study investigates the baseline or inducible differences in between populations of Atlantic salmon lice Lepeophtheirus salmonis with differing levels of resistance to the parasiticidal drug emamectin benzoate (EMB), as well as the induced effects of EMB exposure to Pacific salmon lice. F1 generation lice were exposed in bioassays to a dilution series of emamectin benzoate. Two separate experiments were conducted, one for Atlantic and one for Pacific salmon lice (to be analyzed separately). Atlantic pre-adult salmon lice, separated into male and female, and sensitive or resistant to EMB populations, and exposed to a dilution series: 0 (control), 0.1, 25, 300, and 1000 parts per billion EMB. For each combination four biological replicates were included, except male resistant 25 (n = 3) and female resistant 300 (n = 2). Pacific pre-adult lice of both sexes were exposed to a dilution series: 0 (control), 25, 50 parts per billion EMB.

2014-11-17 | E-GEOD-56024 | biostudies-arrayexpress

Sex-Biased Gene Expression and Sequence Conservation in Pacific and Atlantic Salmon Lice (Lepeophtheirus salmonis)

Project description:This study investigates sex-biased gene expression between populations of Atlantic and Pacific salmon lice, Lepeophtheirus salmonis. Two Atlantic L. salmonis populations were previously used for an array study (GSE56024) while a third dataset using Pacific L. salmonis was novel. Using all three populations, a consensus-based, meta-analysis approach was used to identify sex-biased and sex-specific genes. Two separate experiments were conducted, one for Atlantic and one for Pacific salmon lice. As the Atlantic data has been previously published for other comparisons (GSE56024), only the Pacific data is uploaded here. Lice from three populations (2 in the Atlantic and 1 in the Pacific) were collected for in vitro bioassay analysis using emamectin benzoate. After 24hrs, lice were collected as per treatment protocol below. Males and females from all populations were compared separately before forming a consensus probe list of sex-biased genes concordantly expressed across all three populations. Please note that each raw data file contains three or four 'block' data and each block data correspond to individual sample raw data. Therefore, each raw data file contains raw data for 3-4 samples (as indicated in the description field).

2016-06-01 | E-GEOD-73734 | biostudies-arrayexpress

Avermectin treatment for Lepeophtheirus salmonis: Impacts on host (Salmo salar) and parasite immunophysiology

Project description:This study investigates the transcriptomic responses of salmon lice (L. salmonis) infecting salmon treated with emamectin benzoate (either 1x or 3x), ivermectin, or commercial feed controls

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Sex-Biased Gene Expression and Sequence Conservation in Pacific and Atlantic Salmon Lice (Lepeophtheirus salmonis)

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Project description:This study investigates transcriptomic responses of Atlantic salmon lice, Lepeophtheirus salmonis exposed to cypermethrin, a commonly used antiparasitic agent used in aquaculture. Copepodid L. salmonis were exposed to cypermethrin (Betamax®) at a concentration of 1.0ppb

2016-08-08 | GSE76555 | GEO

Salmon lice SSH

Project description:Salmon lice (Lepeophtheirus salmonis) showing varying emamectin benzoate susceptibilities differ in neuronal acetylcholine receptor and GABA-gated chloride channel mRNA expression.

| PRJEB1387 | ENA

Enhanced transcriptomic responses in the Pacific salmon louse Lepeophtheirus salmonis oncorhynchi to the non-native Atlantic Salmon Salmo salar suggests increased parasite fitness

Project description:This study investigates host-specific gene expression of the Pacific salmon lice, Lepeophtheirus salmonis oncorhynchii, while parasitizing a resistant host (Coho salmon), two susceptible hosts (Atlantic salmon, Sockeye salmon), and a population with-held hosts (starved), over 48 hrs.

2017-01-25 | GSE80220 | GEO

Institute of Aquaculture Lepeophtheirus salmonis analysis of gene expression induced by in vitro exposure to emamectin benzoate

Project description:Caligid copepods, also called sea lice, are common ectoparasites of wild and farmed marine fish. The salmon louse Lepeophtheirus salmonis (KrM-xyer, 1837) has emerged as a serious problem for salmon farming in the Northern hemisphere. The annual cost of sea lice to the global salmon mariculture industry has been estimated at M-^@300 million, of which the majority accounts for the cost of chemically treating the farmed salmon. The treatments available for salmonids with sea lice infestation have been limited with a large scale reliance on single products and the use of antiparasitics with similar modes of action, which when used over a long period of time can enhance the selection pressure for reduced sensitivity. The aim of the present study was to identify transcripts whose expression correlated to emamectin benzoate (EMB) susceptibility, or those genes regulated in response to EMB exposure. Two L. salmonis laboratory strains, established from field isolates and differing in susceptibility to EMB were studied using a custom sea louse 15K oligonucleotide microarray and RT-qPCR. Adult male sea lice were sampled from both strains after 1 and 3 hours of aqueous exposure to 0.2 M-5g mL-1 emamectin benzoate, 0.01% PEG300 or sea water. Bioinformatic analysis identified that in the absence of drug treatment, a large number of genes were significantly down regulated in the louse strain hyposensitive to EMB. EMB exposure had marked effects on gene expression in the EMB susceptible strain, but caused little changes in EMB hyposensitive lice. We therefore suggest that transcriptional responses induced by EMB exposure may not be responsible for reduced susceptibility to this antiparasitic compound, but may involve genes that are constitutively expressed in EMB tolerant salmon louse strains.

2013-11-06 | E-MTAB-1478 | biostudies-arrayexpress

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