Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture
Kelp is widely used as feed in the abalone aquaculture industry in South Africa, and farmers have reported different feed quality between the two dominant kelp species occurring along the west and southwest coasts with Ecklonia maxima reported as having a better Food Conversion Ratio (FCR) than Lami...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Biological Sciences
2017
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613739749998592 |
|---|---|
| access_status_str | Open Access |
| author | Forbes, Cherie Janine |
| author2 | Bolton, John J |
| author_browse | Bolton, John J Forbes, Cherie Janine |
| author_facet | Bolton, John J Forbes, Cherie Janine |
| author_sort | Forbes, Cherie Janine |
| collection | Thesis |
| description | Kelp is widely used as feed in the abalone aquaculture industry in South Africa, and farmers have reported different feed quality between the two dominant kelp species occurring along the west and southwest coasts with Ecklonia maxima reported as having a better Food Conversion Ratio (FCR) than Laminaria pallida. Total protein content and other nutritional components (Carbon, Nitrogen and moisture content) of two kelp species, E. maxima and L. pallida were investigated. The kelps were collected from Kommetjie (borderline of west and southwest coasts). Seasonal total protein content of E.maxima from a commercially-harvested kelp bed in Jacobsbaai (west coast) was compared with crude protein levels (measured as %N x 6.25). Total protein was extracted and quantified using the Bradford method. No significant difference in carbon content was found between seasons for E. maxima but there was a significant difference in average carbon content between E. maxima (30.79 %) and L. pallida (27.79 %). No seasonal pattern was observed in the nitrogen content, and hence crude protein content, of E. maxima (seasonal crude protein averaged 7.8% of dry weight) and there was no significant difference found between E. maxima and L. pallida (crude protein averaged 9. 05% of dry weight). There was no significant seasonal difference in total protein (averaged 0.99% of dry weight) and no significance found between species. The reported better FCR in abalone feed comprised of E. maxima rather than L.pallida, if correct, is likely to be related to higher carbohydrate content (measured here as carbon) and not to higher protein content. E. maxima differs from L. pallida with regards to carbon storage, but not protein content |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/25872 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:40:56.567Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/25872 Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture Forbes, Cherie Janine Bolton, John J Botany Marine Biology Kelp is widely used as feed in the abalone aquaculture industry in South Africa, and farmers have reported different feed quality between the two dominant kelp species occurring along the west and southwest coasts with Ecklonia maxima reported as having a better Food Conversion Ratio (FCR) than Laminaria pallida. Total protein content and other nutritional components (Carbon, Nitrogen and moisture content) of two kelp species, E. maxima and L. pallida were investigated. The kelps were collected from Kommetjie (borderline of west and southwest coasts). Seasonal total protein content of E.maxima from a commercially-harvested kelp bed in Jacobsbaai (west coast) was compared with crude protein levels (measured as %N x 6.25). Total protein was extracted and quantified using the Bradford method. No significant difference in carbon content was found between seasons for E. maxima but there was a significant difference in average carbon content between E. maxima (30.79 %) and L. pallida (27.79 %). No seasonal pattern was observed in the nitrogen content, and hence crude protein content, of E. maxima (seasonal crude protein averaged 7.8% of dry weight) and there was no significant difference found between E. maxima and L. pallida (crude protein averaged 9. 05% of dry weight). There was no significant seasonal difference in total protein (averaged 0.99% of dry weight) and no significance found between species. The reported better FCR in abalone feed comprised of E. maxima rather than L.pallida, if correct, is likely to be related to higher carbohydrate content (measured here as carbon) and not to higher protein content. E. maxima differs from L. pallida with regards to carbon storage, but not protein content 2017-10-30T06:25:17Z 2017-10-30T06:25:17Z 2009 2017-02-20T08:34:14Z Bachelor Thesis Honours BSc (Hons) http://hdl.handle.net/11427/25872 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Botany Marine Biology Forbes, Cherie Janine Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture |
| thesis_degree_str | Bachelor's / Honours |
| title | Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture |
| title_full | Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture |
| title_fullStr | Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture |
| title_full_unstemmed | Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture |
| title_short | Analysis of protein content of two kelps, Ecklonia maxima and Laminaria pallida for feed in abalone aquaculture |
| title_sort | analysis of protein content of two kelps ecklonia maxima and laminaria pallida for feed in abalone aquaculture |
| topic | Botany Marine Biology |
| url | http://hdl.handle.net/11427/25872 |
| work_keys_str_mv | AT forbescheriejanine analysisofproteincontentoftwokelpseckloniamaximaandlaminariapallidaforfeedinabaloneaquaculture |