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dc.contributor.author
Bravo, Jonathan P.  
dc.contributor.author
Hernández, Adrián J.  
dc.contributor.author
Morales, Gabriel Alejandro  
dc.contributor.author
Dantagnan, Patricio  
dc.contributor.author
Márquez, Lorenzo  
dc.date.available
2019-12-12T19:14:37Z  
dc.date.issued
2018-12  
dc.identifier.citation
Bravo, Jonathan P.; Hernández, Adrián J.; Morales, Gabriel Alejandro; Dantagnan, Patricio; Márquez, Lorenzo; Digestive coordination of the gastric function in atlantic salmon salmo salar juveniles; Pontificia Universidad Católica de Valparaíso; Latin American Journal of Aquatic Research; 46; 5; 12-2018; 1083-1090  
dc.identifier.issn
0718-560X  
dc.identifier.uri
http://hdl.handle.net/11336/92105  
dc.description.abstract
Artificial diets have been reported to produce suboptimal pH values in the stomach of salmonid species. Therefore, it is interesting to investigate the gastric function of different species fed commercial diets. In the present work, two groups of Atlantic salmon juveniles were either fasted or fed with a commercial diet. The gastric and duodenal pH values were measured over a 25 h post-prandial period and, dry matter, moisture and protease activity in the gastric chyme of the fed group were also determined. In the fed group, the gastric pH dropped to 3.5, and duodenal pH increased from 7.0 to 7.5 at the 4th h post-feeding, whereas fasted fish showed no significant changes in the gastric pH or duodenal pH. Fed animals showed: i) two discrete events of evacuation, before the 2nd hand after the 8th h of digestion, ii) a change in the moisture of the gastric chyme from less than 10% in the diet to 60% at the 2nd h post-feeding, and iii) a maximal gastric proteases activity of 600 U mL-1 at the 2nd h followed by a nearly constant of value of ~300 U mL-1. It can be concluded that the juveniles of the Atlantic salmon can suitably acidify a commercial diet to a value generally accepted as optimal for gastric proteases of fish, and to retain about 2/3 of the ingested diet under such conditions and at a nearly constant protease activity until the 8th h of digestion.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Pontificia Universidad Católica de Valparaíso  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
COMMERCIAL DIET  
dc.subject
DIET BUFFERING CAPACITY  
dc.subject
GASTRIC EVACUATION  
dc.subject
GASTRIC PH  
dc.subject
GASTRIC PROTEASES  
dc.subject
SALMO SALAR  
dc.subject.classification
Otras Producción Animal y Lechería  
dc.subject.classification
Producción Animal y Lechería  
dc.subject.classification
CIENCIAS AGRÍCOLAS  
dc.title
Digestive coordination of the gastric function in atlantic salmon salmo salar juveniles  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-18T19:08:48Z  
dc.journal.volume
46  
dc.journal.number
5  
dc.journal.pagination
1083-1090  
dc.journal.pais
Chile  
dc.journal.ciudad
Valparaíso  
dc.description.fil
Fil: Bravo, Jonathan P.. Universidad Católica de Temuco; Chile  
dc.description.fil
Fil: Hernández, Adrián J.. Universidad Católica de Temuco; Chile  
dc.description.fil
Fil: Morales, Gabriel Alejandro. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Dantagnan, Patricio. Universidad Católica de Temuco; Chile  
dc.description.fil
Fil: Márquez, Lorenzo. Universidad Católica de Temuco; Chile  
dc.journal.title
Latin American Journal of Aquatic Research  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://lajar.ucv.cl/index.php/rlajar/article/view/vol46-issue5-fulltext-20/994  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2018000501083&lng=es&nrm=iso&tlng=en  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3856/vol46-issue5-fulltext-20