Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua)
Abstract Recently, the nutritional requirements of marine finfish larvae have received considerable attention, and studies have shown that docosahexaenoic acid (DHA) affects the growth and survival of marine finfish larvae. We investigated the effects of different rotifer diets containing variable a...
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Online Access: | http://dx.doi.org/10.1016/j.icesjms.2005.10.011 http://academic.oup.com/icesjms/article-pdf/63/2/285/29124771/63-2-285.pdf |
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croxfordunivpr:10.1016/j.icesjms.2005.10.011 2024-09-15T17:55:23+00:00 Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua) Park, Heum Gi Puvanendran, Velmurugu Kellett, Anne Parrish, Christopher C. Brown, Joseph A. 2006 http://dx.doi.org/10.1016/j.icesjms.2005.10.011 http://academic.oup.com/icesjms/article-pdf/63/2/285/29124771/63-2-285.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 63, issue 2, page 285-295 ISSN 1095-9289 1054-3139 journal-article 2006 croxfordunivpr https://doi.org/10.1016/j.icesjms.2005.10.011 2024-07-08T04:26:11Z Abstract Recently, the nutritional requirements of marine finfish larvae have received considerable attention, and studies have shown that docosahexaenoic acid (DHA) affects the growth and survival of marine finfish larvae. We investigated the effects of different rotifer diets containing variable amounts of DHA on the growth and survival of larval Atlantic cod (Gadus morhua L.). Four different commercial rotifer enrichment formulations were used: spray-dried whole cells composed of Crypthecodinium sp. (ED1), spray-dried whole cells of Schizochytrium sp. (ED2), an oil emulsion (ED3) and ED1, and dried Chlorella at a 7:3 ratio by weight (ED4). The resultant rotifers contained a similar concentration of DHA (1.1–1.6% DW), but the level of DHA differed in proportion to EPA for each enrichment, and was designated ER1–4. Twelve 30-l aquaria were used with three replicates per treatment. Larvae were fed with rotifers from 3 to 43 days post-hatch (dph) at 4000 prey l−1. At the end of the experiment, no significant differences were found in body length and dry weight between the larvae reared on ER1 and ER2. However, larvae reared on ER3 were significantly smaller (both in length and weight) than larvae reared on ER1 and ER2. Larval survival on the ER2 treatment at 43 dph was significantly higher than on the other three treatments. Our results showed a positive effect of rotifer DHA proportions on growth and survival of cod larvae, and demonstrated that Atlantic cod larvae require a high ratio of dietary DHA to EPA. Article in Journal/Newspaper atlantic cod Gadus morhua Rotifer Oxford University Press ICES Journal of Marine Science 63 2 285 295 |
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Oxford University Press |
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croxfordunivpr |
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description |
Abstract Recently, the nutritional requirements of marine finfish larvae have received considerable attention, and studies have shown that docosahexaenoic acid (DHA) affects the growth and survival of marine finfish larvae. We investigated the effects of different rotifer diets containing variable amounts of DHA on the growth and survival of larval Atlantic cod (Gadus morhua L.). Four different commercial rotifer enrichment formulations were used: spray-dried whole cells composed of Crypthecodinium sp. (ED1), spray-dried whole cells of Schizochytrium sp. (ED2), an oil emulsion (ED3) and ED1, and dried Chlorella at a 7:3 ratio by weight (ED4). The resultant rotifers contained a similar concentration of DHA (1.1–1.6% DW), but the level of DHA differed in proportion to EPA for each enrichment, and was designated ER1–4. Twelve 30-l aquaria were used with three replicates per treatment. Larvae were fed with rotifers from 3 to 43 days post-hatch (dph) at 4000 prey l−1. At the end of the experiment, no significant differences were found in body length and dry weight between the larvae reared on ER1 and ER2. However, larvae reared on ER3 were significantly smaller (both in length and weight) than larvae reared on ER1 and ER2. Larval survival on the ER2 treatment at 43 dph was significantly higher than on the other three treatments. Our results showed a positive effect of rotifer DHA proportions on growth and survival of cod larvae, and demonstrated that Atlantic cod larvae require a high ratio of dietary DHA to EPA. |
format |
Article in Journal/Newspaper |
author |
Park, Heum Gi Puvanendran, Velmurugu Kellett, Anne Parrish, Christopher C. Brown, Joseph A. |
spellingShingle |
Park, Heum Gi Puvanendran, Velmurugu Kellett, Anne Parrish, Christopher C. Brown, Joseph A. Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua) |
author_facet |
Park, Heum Gi Puvanendran, Velmurugu Kellett, Anne Parrish, Christopher C. Brown, Joseph A. |
author_sort |
Park, Heum Gi |
title |
Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua) |
title_short |
Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua) |
title_full |
Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua) |
title_fullStr |
Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua) |
title_full_unstemmed |
Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua) |
title_sort |
effect of enriched rotifers on growth, survival, and composition of larval atlantic cod (gadus morhua) |
publisher |
Oxford University Press (OUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1016/j.icesjms.2005.10.011 http://academic.oup.com/icesjms/article-pdf/63/2/285/29124771/63-2-285.pdf |
genre |
atlantic cod Gadus morhua Rotifer |
genre_facet |
atlantic cod Gadus morhua Rotifer |
op_source |
ICES Journal of Marine Science volume 63, issue 2, page 285-295 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2005.10.011 |
container_title |
ICES Journal of Marine Science |
container_volume |
63 |
container_issue |
2 |
container_start_page |
285 |
op_container_end_page |
295 |
_version_ |
1810431678996283392 |