title: Stocking density and Piscirickettsia salmonis infection effect on Patagonian blennie (Eleginops maclovinus, Cuvier 1830) skeletal muscle intermediate metabolism.
abstract: The need to expand aquaculture production has led to other fish to be considered as potential species for culture, such as the sub-Antarctic notothenioid Eleginops maclovinus (Valenciennes, 1830). The aim of this study was to determine the cumulative effect of density and pathogen infection by protein extract of Piscirickettsia salmonis on skeletal muscle metabolism. In a first experiment, specimens were submitted to three different stocking densities: (1) 3.1 kg m(-3), (2) 15 kg m(-3) and (3) 60 kg m(-3), for a period of 10 days. In a second experiment, metabolic changes caused by an infection of P. salmonis protein extract (a single injection of 0.5 μL P. salmonis protein extract g body weight(-1) was inoculated in the fish) and its combined effect with stocking density was assessed during a period of 10 days. This study concludes that stress caused by high stocking density led to the reorganization of some metabolic routes to fulfill skeletal muscle energy needs. Furthermore, infection response by pathogen P. salmonis differed when stocking density increased, suggesting an increase of energy needs with density in skeletal muscle of infected fish.
authors.affiliation: Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile, luis.vargas@uach.cl.
authors.forename: L
authors.initials: L
authors.lastname: Vargas-Chacoff
authors.forename: E
authors.initials: E
authors.lastname: Ortíz
authors.forename: R
authors.initials: R
authors.lastname: Oyarzún
authors.forename: D
authors.initials: D
authors.lastname: Martínez
authors.forename: E
authors.initials: E
authors.lastname: Saavedra
authors.forename: R
authors.initials: R
authors.lastname: Sá
authors.forename: V
authors.initials: V
authors.lastname: Olavarría
authors.forename: D
authors.initials: D
authors.lastname: Nualart
authors.forename: A
authors.initials: A
authors.lastname: Yáñez
authors.forename: C
authors.initials: C
authors.lastname: Bertrán
authors.forename: J M
authors.initials: JM
authors.lastname: Mancera
mesh_terms: D000596:Amino Acids / Q000378:metabolism; D000822:Animal Husbandry; D000818:Animals; D017756:Aquaculture; D005393:Fish Diseases / Q000378:metabolism / Q000382:microbiology* / Q000473:pathology; D005786:Gene Expression Regulation / Q000502:physiology; D005947:Glucose / Q000378:metabolism; D006003:Glycogen / Q000378:metabolism; D009124:Muscle Proteins / Q000235:genetics / Q000378:metabolism; D018482:Muscle, Skeletal / Q000378:metabolism*; D010473:Perciformes; D053522:Piscirickettsia / Q000145:classification*; D044225:Piscirickettsiaceae Infections / Q000662:veterinary*; D012307:Risk Factors
chemical_list: D000596:Amino Acids; D009124:Muscle Proteins; D006003:Glycogen; D005947:Glucose