dc.creatorJara, Betzabel
dc.creatorAbarca, Marcelo
dc.creatorWilson, Rodolfo
dc.creatorKrapivka Flores, Sebastián
dc.creatorMercado, Ana
dc.creatorGuiñez, Ricardo
dc.creatorMarchant, Lorena
dc.date.accessioned2018-05-23T17:51:54Z
dc.date.accessioned2019-04-26T01:34:03Z
dc.date.available2018-05-23T17:51:54Z
dc.date.available2019-04-26T01:34:03Z
dc.date.created2018-05-23T17:51:54Z
dc.date.issued2017
dc.identifierAquaculture Research, 2017, 48, 4420–4428
dc.identifier10.1111/are.13267
dc.identifierhttp://repositorio.uchile.cl/handle/2250/148079
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/2452146
dc.description.abstractA central problem facing worldwide culture of yellowtail kingfish (Seriola lalandi) is the presence of skeletal malformations, including jaw deformities. This study presents a morphological characterization of normal and abnormal cartilage jaw structures during early larval development. Samples of 70-150 larvae were collected from three cohorts from 2 to 9days post hatching, anaesthetized and fixed for cartilage staining. Cartilaginous components were defined clearly at four days post hatch (dph) (4.65 +/- 0.05mm total length), and abnormal jaw structures were detectable at this time. Jaw deformities observed included extension of Meckel's cartilage with or without ventral bending of the anterior tip, displacement of ceratohyal and hypohyal cartilage ventrally and below Meckel's cartilage, and shortening and dorsal flexion of the lower jaw. At 4 dph, between 44% and 47% of all larvae examined had jaw abnormalities. The contribution of each deformity to the total number of deformities was variable among the three cohorts examined. To compare shape difference accurately we performed an exploratory, landmark-based geometric morphometric analysis using seven homologous landmarks. Larvae were classified into three jaw morphology groups. The geometric morphometric approach provides a useful tool to standardize classification of cartilage jaw abnormalities at early developmental larval stages. Early recognition of developing abnormalities is of importance for fish farmers in both improving fish selection efficiency and for evaluating effects of rearing parameters.
dc.languageen
dc.publisherWiley
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile
dc.sourceAquaculture Research
dc.subjectLarval development
dc.subjectLandmark shape analysis
dc.subjectJaw deformities
dc.subjectSeriola lalandi
dc.titleQualitative analysis of cartilaginous jaw element malformation in cultured yellowtail kingfish (Seriola lalandi) larvae
dc.typeArtículos de revistas


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