Growth of juvenile Atlantic cod Gadus morhua in land-based recirculation systems. Effects of feeding regime, photoperiod and diet
(2009) In Aquaculture 292(3-4). p.225-231- Abstract
- The combined effect of feeding regime and photoperiod on the growth of juvenile Atlantic cod Gadus morhua in land-based recirculating aquaculture systems (RAS) was examined using three different commercial diets. Fish of 8-10 g were reared in 1 m³ tanks at an initial density of 10 kg m-³ for 78 d. Three RAS units were used to simultaneously test three feed/photoperiod regimes that might be encountered in the wild or aquaculture; LightDark (LD) 24:0, LD12:11 (+1 h crepuscular periods) and LD6:6 (+12 h crepuscular periods). Feed was administered during the light period every 30 min for a 3 min feeding duration. In each RAS unit three diets (A, B and C) were tested, which were broadly similar in composition but from different manufacturers.... (More)
- The combined effect of feeding regime and photoperiod on the growth of juvenile Atlantic cod Gadus morhua in land-based recirculating aquaculture systems (RAS) was examined using three different commercial diets. Fish of 8-10 g were reared in 1 m³ tanks at an initial density of 10 kg m-³ for 78 d. Three RAS units were used to simultaneously test three feed/photoperiod regimes that might be encountered in the wild or aquaculture; LightDark (LD) 24:0, LD12:11 (+1 h crepuscular periods) and LD6:6 (+12 h crepuscular periods). Feed was administered during the light period every 30 min for a 3 min feeding duration. In each RAS unit three diets (A, B and C) were tested, which were broadly similar in composition but from different manufacturers. Water exchange rate averaged 10-19% in the three recirculation systems, and key water quality parameters such as NH4+ and CO2 remained at low effect concentrations (<0.4 and <3 mg L-1, respectively). Final stocking densities were 45-60 kg m-³. There was a significant influence of both feed/photoperiod regime and diet on specific growth rate (SGR). Fish receiving the LD12:11 and LD6:6 regimes and Diet A grew best (SGR 2.59 and 2.54 % d-1 respectively). Fish fed Diet B and C also grew best under the LD12:11 and LD6:6 feed/photoperiod regimes (SGR range of 2.41 – 2.46 % d-1). Conversely, fish kept in the LD24:0 feed/photoperiod regime grew relatively slowly irrespective of diet type (SGR range of 2.26 – 2.32 % d-1). The feed conversion performance of the feed/photoperiod regimes and diets followed the same pattern. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1981399
- author
- Fülberth, M ; Moran, Damian LU ; Jarlbæk, H and Støttrup, J.G
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Feeding regime, Growth, Photoperiod, Recirculation system, Feed conversion, Diet
- in
- Aquaculture
- volume
- 292
- issue
- 3-4
- pages
- 225 - 231
- publisher
- Elsevier
- external identifiers
-
- scopus:67349094514
- ISSN
- 0044-8486
- DOI
- 10.1016/j.aquaculture.2009.04.028
- language
- English
- LU publication?
- no
- id
- 2f9b58c2-a20e-47fe-9122-0b468b6cb692 (old id 1981399)
- date added to LUP
- 2016-04-01 12:02:28
- date last changed
- 2022-01-26 21:56:18
@article{2f9b58c2-a20e-47fe-9122-0b468b6cb692, abstract = {{The combined effect of feeding regime and photoperiod on the growth of juvenile Atlantic cod Gadus morhua in land-based recirculating aquaculture systems (RAS) was examined using three different commercial diets. Fish of 8-10 g were reared in 1 m³ tanks at an initial density of 10 kg m-³ for 78 d. Three RAS units were used to simultaneously test three feed/photoperiod regimes that might be encountered in the wild or aquaculture; LightDark (LD) 24:0, LD12:11 (+1 h crepuscular periods) and LD6:6 (+12 h crepuscular periods). Feed was administered during the light period every 30 min for a 3 min feeding duration. In each RAS unit three diets (A, B and C) were tested, which were broadly similar in composition but from different manufacturers. Water exchange rate averaged 10-19% in the three recirculation systems, and key water quality parameters such as NH4+ and CO2 remained at low effect concentrations (<0.4 and <3 mg L-1, respectively). Final stocking densities were 45-60 kg m-³. There was a significant influence of both feed/photoperiod regime and diet on specific growth rate (SGR). Fish receiving the LD12:11 and LD6:6 regimes and Diet A grew best (SGR 2.59 and 2.54 % d-1 respectively). Fish fed Diet B and C also grew best under the LD12:11 and LD6:6 feed/photoperiod regimes (SGR range of 2.41 – 2.46 % d-1). Conversely, fish kept in the LD24:0 feed/photoperiod regime grew relatively slowly irrespective of diet type (SGR range of 2.26 – 2.32 % d-1). The feed conversion performance of the feed/photoperiod regimes and diets followed the same pattern.}}, author = {{Fülberth, M and Moran, Damian and Jarlbæk, H and Støttrup, J.G}}, issn = {{0044-8486}}, keywords = {{Feeding regime; Growth; Photoperiod; Recirculation system; Feed conversion; Diet}}, language = {{eng}}, number = {{3-4}}, pages = {{225--231}}, publisher = {{Elsevier}}, series = {{Aquaculture}}, title = {{Growth of juvenile Atlantic cod Gadus morhua in land-based recirculation systems. Effects of feeding regime, photoperiod and diet}}, url = {{http://dx.doi.org/10.1016/j.aquaculture.2009.04.028}}, doi = {{10.1016/j.aquaculture.2009.04.028}}, volume = {{292}}, year = {{2009}}, }