Nutrition during periconception and early development can modulate metabolic routes to prepare th... more Nutrition during periconception and early development can modulate metabolic routes to prepare the offspring for adverse conditions through a process known as nutritional programming. In gilthead sea bream, replacement of fish oil (FO) with linseed oil (LO) in broodstock diets improves growth in the 4-month-old offspring challenged with low-FO and low-fishmeal (FM) diets for 1 month. The present study further investigated the effects of broodstock feeding on the same offspring when they were 16 months old and were challenged for a second time with the low-FM and low-FO diet for 2 months. The results showed that replacement of parental moderate-FO feeding with LO, combined with juvenile feeding at 4 months old with low-FM and low-FO diets, significantly (P<0·05) improved offspring growth and feed utilisation of low-FM/FO diets even when they were 16 months old: that is, when they were on the verge of their first reproductive season. Liver fatty acid composition was significantly a...
Despite being proposed as a potential candidate for diversification of marine aquaculture, limite... more Despite being proposed as a potential candidate for diversification of marine aquaculture, limited larval survival and the occurrence of elevated levels of skeletal deformities restrict the commercial production of red porgy. The present study was conducted to determine the effect of rotifer enrichment, particularly on DHA, on growth, survival and occurrence of skeleton deformities in this species. The study included
... Eyad Atalah, Carmen Mar|¤a HernaŁndez-Cruz, Eneko Ganuza,Tibiabin Ben|¤tez-Santana, Rachid Ga... more ... Eyad Atalah, Carmen Mar|¤a HernaŁndez-Cruz, Eneko Ganuza,Tibiabin Ben|¤tez-Santana, Rachid Ganga, Javier Roo, Daniel Montero & Marisol Izquierdo Grupo de Investigacio¤n en Acuicultura, Universidad de Las Palmas de Gran Canaria e Instituto Canario de Ciencias ...
ABSTRACT The effect of two physical tagging systems, Visible Implant Elastomer (VIE) and Passive ... more ABSTRACT The effect of two physical tagging systems, Visible Implant Elastomer (VIE) and Passive Integrated Transponder (PIT), was evaluated in red porgy (Pagrus pagrus) fingerlings, at different sizes. For VIE tagging, the weight classes were &lt;1 and 1–5 g and no tag effect was detected on fish growth. There was a significant difference in mortality between tagged and untagged &lt;1 g fish, but not for the 1–5 g fish. The tag loss rate was null for all sizes, however, tags showed fragmentation. This partial tag loss was evaluated and quantified. Seven VIE colours were compared and arranged from best to worst visibility: green, red, pink, orange, yellow, white and blue. For PIT tagging, 2–6 g, 5–10 g and 10–20 g weight classes were analysed. There was no significant tag effect on fish growth, for any size, nor on mortality from 10 g. Tag loss rate ranged from 2.9 to 5.9%. These results demonstrate that, in red porgy, VIE is a successful tagging system from 2 g onwards whereas PIT system is successful from 10 g onwards. The combination of both systems allows traceability of fish from a very small size on, which is necessary for the implementation of genetic breeding programmes.
Nutrition during periconception and early development can modulate metabolic routes to prepare th... more Nutrition during periconception and early development can modulate metabolic routes to prepare the offspring for adverse conditions through a process known as nutritional programming. In gilthead sea bream, replacement of fish oil (FO) with linseed oil (LO) in broodstock diets improves growth in the 4-month-old offspring challenged with low-FO and low-fishmeal (FM) diets for 1 month. The present study further investigated the effects of broodstock feeding on the same offspring when they were 16 months old and were challenged for a second time with the low-FM and low-FO diet for 2 months. The results showed that replacement of parental moderate-FO feeding with LO, combined with juvenile feeding at 4 months old with low-FM and low-FO diets, significantly (P<0·05) improved offspring growth and feed utilisation of low-FM/FO diets even when they were 16 months old: that is, when they were on the verge of their first reproductive season. Liver fatty acid composition was significantly a...
Despite being proposed as a potential candidate for diversification of marine aquaculture, limite... more Despite being proposed as a potential candidate for diversification of marine aquaculture, limited larval survival and the occurrence of elevated levels of skeletal deformities restrict the commercial production of red porgy. The present study was conducted to determine the effect of rotifer enrichment, particularly on DHA, on growth, survival and occurrence of skeleton deformities in this species. The study included
... Eyad Atalah, Carmen Mar|¤a HernaŁndez-Cruz, Eneko Ganuza,Tibiabin Ben|¤tez-Santana, Rachid Ga... more ... Eyad Atalah, Carmen Mar|¤a HernaŁndez-Cruz, Eneko Ganuza,Tibiabin Ben|¤tez-Santana, Rachid Ganga, Javier Roo, Daniel Montero & Marisol Izquierdo Grupo de Investigacio¤n en Acuicultura, Universidad de Las Palmas de Gran Canaria e Instituto Canario de Ciencias ...
ABSTRACT The effect of two physical tagging systems, Visible Implant Elastomer (VIE) and Passive ... more ABSTRACT The effect of two physical tagging systems, Visible Implant Elastomer (VIE) and Passive Integrated Transponder (PIT), was evaluated in red porgy (Pagrus pagrus) fingerlings, at different sizes. For VIE tagging, the weight classes were &lt;1 and 1–5 g and no tag effect was detected on fish growth. There was a significant difference in mortality between tagged and untagged &lt;1 g fish, but not for the 1–5 g fish. The tag loss rate was null for all sizes, however, tags showed fragmentation. This partial tag loss was evaluated and quantified. Seven VIE colours were compared and arranged from best to worst visibility: green, red, pink, orange, yellow, white and blue. For PIT tagging, 2–6 g, 5–10 g and 10–20 g weight classes were analysed. There was no significant tag effect on fish growth, for any size, nor on mortality from 10 g. Tag loss rate ranged from 2.9 to 5.9%. These results demonstrate that, in red porgy, VIE is a successful tagging system from 2 g onwards whereas PIT system is successful from 10 g onwards. The combination of both systems allows traceability of fish from a very small size on, which is necessary for the implementation of genetic breeding programmes.
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