Including low levels of lupin seed meal in the diets of\r\nshrimp can stimulate their immune systems.Trials undertaken by researchers from Germany’s Alfred Wegener Institute investigated\r\n...
Including low levels of lupin seed meal in the diets of\r\nshrimp can stimulate their immune systems.
Trials undertaken by researchers from Germany’s Alfred Wegener Institute investigated\r\nthe impact of supplementing the fishmeal content of conventional vannamei\r\nshrimp diets with formulations that included four different levels of meal from\r\nlupin (Lupinus angustifolius) seeds.
The trials took place in a recirculating aquaculture system\r\n(RAS) for eight weeks in which juvenile shrimp were provided formulated diets\r\ncontaining various levels of lupin meal (0, 100, 200 and 300 g kg−1)\r\nsupplementing the fishmeal component, and a commercial feed as general\r\nreference.
Their results showed that survival rates did not differ\r\nsignificantly between groups, although diets containing more than 300 g of\r\nlupin meal per kg of feed led to “significantly impaired” growth levels as well\r\nas led to reduced and nutritional status, as expressed by a reduction in\r\nhemolymph glucose and acyl glyceride content.
On a more positive note, the researchers observed that\r\n“phenoloxidase activity was highest in shrimp fed 100 g kg−1 lupin meal\r\ndiet, indicating improved immune status.”
As a result, the authors conclude: “The results demonstrate\r\nthat dehulled lupin seed meal is a suitable, regional alternative protein\r\nsource for aquaculture feeds that can supply good quality protein to white leg\r\nshrimp and can replace significant amounts of diet fishmeal.”
They also suggest that “higher substitution rates might be\r\nachieved by supplementing a mix of lupin meal and other regional plants, such\r\nas fava bean. This might provide a more balanced nutritional supply and make\r\nuse of the immuno‐stimulating effect of moderate lupin inclusion rates.”
They go on to say that further research to assess methods\r\nfor lupin pretreatment to enhance digestibility would also be worthwhile.
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The full article, published in the latest issue of Aquaculture\r\nNutrition under the title, "Lupin kernel meal as a fishmeal replacement\r\nin formulated feeds for the Whiteleg Shrimp (Litopenaeus vannamei)", can\r\nbe accessed here.
Source: The Fish Site
Ditulis oleh
Tim Minapoli
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Pakar di bidang akuakultur dengan pengalaman lebih dari 15 tahun. Aktif berkontribusi dalam pengembangan industri perikanan Indonesia.