Food Consumption, Absorption, Assimilation and Growth of the Sea Urchin Strongylocentrotus intermedius Fed a Prepared Feed and the Alga Laminaria japonica
Ya-Qing Chang
Key Laboratory of Mariculture & Biotechnology, Dalian Fisheries University, 52, Heishijiao Street, Dalian, Liaoning Province, 116023, People's Republic of China
Search for more papers by this authorJohn M. Lawrence
Department of Biology, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, USA
Search for more papers by this authorXue-Bin Cao
Key Laboratory of Mariculture and Biotechnology, Dalian Fisheries University, 52, Heishijiao Street, Dalian, Liaoning Province, 116023, People's Republic of China
Search for more papers by this authorAddisonL. Lawrence
Texas A&M Agricultural Experimental Station, Texas A&M University System, 1300 Port Street, Port Aransas, Texas 78373, USA
Search for more papers by this authorYa-Qing Chang
Key Laboratory of Mariculture & Biotechnology, Dalian Fisheries University, 52, Heishijiao Street, Dalian, Liaoning Province, 116023, People's Republic of China
Search for more papers by this authorJohn M. Lawrence
Department of Biology, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, USA
Search for more papers by this authorXue-Bin Cao
Key Laboratory of Mariculture and Biotechnology, Dalian Fisheries University, 52, Heishijiao Street, Dalian, Liaoning Province, 116023, People's Republic of China
Search for more papers by this authorAddisonL. Lawrence
Texas A&M Agricultural Experimental Station, Texas A&M University System, 1300 Port Street, Port Aransas, Texas 78373, USA
Search for more papers by this authorAbstract
Prepared feeds are standard for developed aquaculture programs. Prepared feeds have been shown to be effective for several species of sea urchins. We investigated the use of prepared feeds for culture of the important commercial species Strongylocentrotus intermedius by comparison with the usual food used, the brown alga Laminaria japonica. The experiment was done in the summer and consisted of two successive 30-d periods. Individuals consumed more of the alga than the prepared feed but the absorption efficiencies were the same. This probably resulted from a higher content of structural carbohydrates in the alga and a higher content of available organic matter in the feed. The amount of organic matter absorbed was the same for both foods. However, the amount of gonad production and the assimilation efficiency was greater for the prepared feed. This indicates the prepared feed is of better nutritional quality. The physiological measurements and production were greater in the first 30-d period when the temperature was < 20 C than in the second when it was > 21 C. This indicates temperature will be an important consideration in aquaculture of S. intermedius.
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