Using genetic methods for analysis of fish meals and feeds employed in Greek mariculture
| Autor: | L. Kokokiris, Nikoleta Karaiskou, Elena Drosopoulou, Alexander Triantafyllidis, Foteini‐Izampela Zampeta, Antonis Vlachavas |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
biology business.industry 010604 marine biology & hydrobiology Pelagic zone 04 agricultural and veterinary sciences Aquatic Science biology.organism_classification 040401 food science 01 natural sciences Commercial fish feed Fishery 0404 agricultural biotechnology Fish meal Engraulis Aquaculture Marine ecosystem Mariculture business Trophic level |
| Zdroj: | Aquaculture Research. 50:312-322 |
| ISSN: | 1365-2109 1355-557X |
| DOI: | 10.1111/are.13900 |
| Popis: | Large quantities of high protein fish meals are needed to sustain cultured species and thus the impact to marine ecosystem has been highly discussed. The aim of this study was to apply a PCR‐cloning methodology for a robust insight into the composition of commercial fish meals and feeds for farmed species of the Greek mariculture, assessing the risk posed by aquaculture to marine ecosystems but also the risk posed by commercial fish feeds to the increase in trophic level of species farmed in Greece. 89% of the sequences were identified to species level and only 11% to genus/family level. Overall, a total of 49 taxa were identified (44 fish species/taxon, five non‐fish species/taxon). Even though small pelagic fish like Engraulis sp. were the main portion, a wide range of species constituted the fish meals and feeds. Plant and animal species were also detected as an alternative protein source. Feed products employed in Greek mariculture still contain large portions of fish meals which increase the mean trophic level of farmed species causing a farming up trend. The results emphasize that such molecular methodologies are needed to certify aquafeeds allowing fish feed producers to demonstrate their commitment to sustainable aquaculture. |
| Databáze: | OpenAIRE |
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