Abstract
Inferior Assimilation of Algae-based Diets by Sea Cucumber Holothuria scabra under Laboratory Condition Expressed by Stable Isotope Mixing Model
Highlights
Sea cucumbers (Phylum: Echinodermata), close cousins to sea stars, sea urchins are exclusively marine and obtain food by ingesting marine sediment or by filtering seawater [1,2]
Four kinds of diets were prepared for H. scabra containing one algae each mixed with marine pellet in the ratio of 7:3 i.e. SGP diet (Sargassum + marine pellet), SPP diet (Spirulina + marine pellet), FCP diet (Fucus + marine pellet) and ULP diet (Ulva + marine pellet) respectively
The carbon stable isotope ratios (δ13C) and carbon contents of H. scabra fed with different diets are provided (Table 2)
Summary
Sea cucumbers (Phylum: Echinodermata), close cousins to sea stars, sea urchins are exclusively marine and obtain food by ingesting marine sediment or by filtering seawater [1,2]. Carbon stable isotope analysis (CSIA) is a useful technique to determine the exact food sources and feeding selectivity, trophic positions and movement patterns of both aquatic and terrestrial animals [7,8,9,10,11]. It implies diet information over a time-period depending on the tissue specific turnover rates [12,13,14]. The influence of diets on the growth of sea cucumber is recorded to provide scientific evidence for optimizing the ingredients of artificial feed generally used in sea cucumber farming under captivity
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