Skip Navigation

ICES Journal of Marine Science: Journal du Conseil 2006 63(2):285-295; doi:10.1016/j.icesjms.2005.10.011
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Park, H. G.
Right arrow Articles by Brown, J. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Park, H. G.
Right arrow Articles by Brown, J. A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 2005 International Council for the Exploration of the Sea

Effect of enriched rotifers on growth, survival, and composition of larval Atlantic cod (Gadus morhua)

Heum Gi Parka, Velmurugu Puvanendranb,*, Anne Kellettb, Christopher C. Parrishb and Joseph A. Brownb

a Faculty of Marine Bioscience and Technology, Kangnung National University Kangnung 210-702, South Korea
b Ocean Sciences Centre, Memorial University St. John's, Newfoundland, Canada A1C 5S7

*Correspondence to V. Puvanendran: tel: +1 709 737 3026; fax: +1 709 737 3220. e-mail: puvy{at}mun.ca.

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.

Keywords: Atlantic cod larvae, DHA proportion, DHA/EPA ratio, enrichments, rotifer

Received 13 June 2004; accepted 6 October 2005.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.