2024-03-28T20:04:35Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/441912019-03-05T13:10:43Zcom_10261_123com_10261_8col_10261_376
2012-01-12T11:37:22Z
urn:hdl:10261/44191
Growth and proteolytic activity of Octopus vulgaris paralarvae with different food rations during first feeding, using Artemia nauplii and compound diets
Villanueva, Roger
Koueta, N. Koueta
Riba, J.
Boucaud-Camou, E.
Food ratio
Enzyme
Growth
Cephalopod
Octopus
Larvae
18 pages, 4 figures, 3 tables
Experiments were conducted to investigate growth and proteolytic activity of the common octopus Octopus vulgaris, reared with different diets and ration levels during first feeding. Four ration levels were tested, 0.2, 2, 4 and 10 Artemia nauplii ml−1 day−1 and co-feeding techniques were tested using 10 Artemia nauplii ml−1 day−1 plus three different compound millicapsules. Total proteolytic activity, trypsin and chymotrypsin levels were recorded from eggs, hatchlings and during the first month of paralarval rearing. Five days after hatching, paralarval weight and proteolytic activity was dependent on food ration. The low-food treatment did not lead to an increase in hatchling weight, in contrast with the positive increase of the other treatments. After 20 days, best survival was observed in treatments fed 2 and 4 nauplii ml−1 day−1. High nauplii rations of 10 nauplii ml−1 day−1 plus millicapsule diet treatments produced higher growth and higher proteolytic, trypsin and chymotrypsin levels, but poor survival. Total proteolytic activity was correlated with paralarval weight, whereas trypsin and chymotrypsin were maintained at hatchling levels only for the high food and co-feeding treatments, and decreased in the others. The trypsin activity in the high-food treatment showed a sharp increase after 15 days and 880 μg of the mean dry weight (2.5 times hatchling weight). Millicapsules were ingested by the paralarvae after 5 days but did not lead to a significant increase in weight. Enriched Artemia nauplii seem to be useful only as an initial diet until a doubling in hatchling weight is achieved. This period can extend from 11 to 14 days at 20 °C, after which a larger prey and/or suitable microdiet is required
2012-01-12T11:37:22Z
2012-01-12T11:37:22Z
2002-03-11
artículo
Aquaculture 205 (3-4):269-286 (2002)
0044-8486
http://hdl.handle.net/10261/44191
10.1016/S0044-8486(01)00678-0
eng
https://doi.org/10.1016/S0044-8486(01)00678-0
closedAccess
Elsevier