| dc.creator | Moyano,Guillermo | |
| dc.creator | Plaza,Guido | |
| dc.creator | Toledo,María Isabel | |
| dc.date | 2012-09-01 | |
| dc.date.accessioned | 2019-05-03T13:27:19Z | |
| dc.date.available | 2019-05-03T13:27:19Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2012000300019 | |
| dc.identifier.uri | http://revistaschilenas.uchile.cl/handle/2250/87815 | |
| dc.description | Otolith microstructure (MO) analysis was used to back-calculate growth patterns from hatching to the yolk-sac absorption in Rainbow trout alevins (Oncorhynchus mykiss), under experimental conditions, from winter to spring in Central-Chile. MO showed the following main features: (i) occurrences of multiple primordia in the central region of otolith (MP); (ii) several increments (22 ± 3 rings) before a prominent hatch check surrounding MP and (iii) existence of a very distinctive check associated to yolk-sac absorption. Further findings were the validation of daily periodicity of micro-increments and a significant linear relationship (P < 0.001; r² = 0.91) between the maximum otolith length (MOL) and total length (TL) of alevins. The linear MOL-TL relationship validated the use of the biological intercept method to back-calculate daily growth rates. Growth rates profiles followed a decreasing trend from hatching to the end of yolk-sac period (16 ± 1 days), ranging from 0.34 mm d-1 to 0.22 mm d-1 (0.30 ± 0.037). MO analysis demonstrated to be a powerful tool in back-calculating growth patterns of alevins once they had absorbed their yolk-sac. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar | |
| dc.relation | 103856/vol40-issue3-fulltext-19 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Latin american journal of aquatic research v.40 n.SpecIssue 2012 | |
| dc.subject | Sagittae | |
| dc.subject | otolith | |
| dc.subject | growth rate | |
| dc.subject | Oncorhynchus mykiss | |
| dc.subject | Chile | |
| dc.title | Otolith micro-structure analysis of rainbow trout alevins (Oncorhynchus mykiss) under rearing conditions | |
