Effects of docosahexaenoic acid on growth, survival and swim bladder inflation of larval amberjack (Seriola dumerili, Risso)

Abstract

The effect of docosahexaenoic acid (DHA) on the growth performance, survival and swim bladder inflation of larval Seriola dumerili during the rotifer feeding period was investigated in two feeding experiments. Amberjack larvae at 3 day post hatching were fed rotifers enriched with (1) freshwater Chlorella (Chlo), (2) a mixture (2:1, v/v) of Chlo and DHA-enriched Chlorella (DHA-Chlo), (3) DHA-Chlo and (4) DHA-Chlo and commercial DHA emulsion, in triplicate for 7 days. The average DHA contents of the rotifers were 0.0, 0.4, 1.0 and 1.9 mg g À1 DM respectively. The survival rate was improved by the enrichment of rotifers with DHA-Chlo alone, and DHA-Chlo and emulsion. Growth and swim bladder inflation of fish fed rotifers enriched with DHA-Chlo were significantly (P < 0.05) improved, however, with increased levels of DHA further improvement was not found. DHA content in the larval whole body proportionally increased with the DHA level in the rotifers. These results suggest that DHA enrichment of rotifers is effective to improve the growth, survival rate and swim bladder inflation of amberjack larvae. The DHA requirement of amberjack larvae is estimated to be 1.5 mg g À1 on a dry matter basis of rotifers.

Effects of dietary docosahexaenoic acid on growth performance, fatty acid profile and lipogenesis of blunt snout bream ( Megalobrama amblycephala )

“…Docosahexaenoic acid is one of the main n‐3 LC‐PUFAs, which is significant to fish development (Matsunari et al, ). M. amblycephala is one of the most commonly eaten freshwater fish in China (Fisheries Bureau & Ministry of Agriculture of China, ).…”

“…Some studies have reported that the effect of DHA was superior to EPA in the growth of some larval fishes (Emery, Norambuena, Trushenski, & Turchini, ; Takeuchi, Arakawa, Satoh, & Watanabe, ; Wu, Ting, & Chen, ). DHA is one of the main n‐3 LC‐PUFAs, which could promote normal growth, survival rate and swim bladder inflation of larval fish (Campoverde & Estevez, ; Matsunari et al, ). Feeding diets deficient in DHA showed growth retardation, and diets supplemented with DHA significantly increased the growth of fish (Bransden, Battaglene, Morehead, Dunstan, & Nichols, ).…”

Free Amino Acid Enriched Rotifer for Larval Grouper Cromileptes altivelis (Pengkayaan Rotifer dengan Asam Amino Bebas Untuk Larva Kerapu Bebek Cromileptes altivelis)

“…Kandungan lemak rotifer yang cukup tinggi di semua perlakuan dipengaruhi oleh penambahan minyak ikan pada saat pengkayaan sebagai sumber asam lemak n3-highly unsaturated fatty acids, terutama 22:6n-3. Asam lemak tersebut sangat esensial bagi ikan kerapu (Wu et al, 2002) dan ikan laut lainnya, seperti larva amberjack Seriola dumerili, karena dapat meningkatkan pertumbuhan, sintasan dan perkembangan gelembung renang (Matsunari et al, 2013). Namun, kadar lemak rotifer yang tinggi belum mampu secara maksimal memberikan energi berlebih kepada larva untuk mengkonsummsi rotifer.…”

“…Namun, untuk meningkatkan pertumbuhan dan sintasan larva ikan amberjack Seriola dumerili dibutuhkan taurin sebanyak 800 mg/l media pengkaya (Matsunari et al, 2013), untuk larva Japanese flounder Paralichthys olivaceus sebanyak 400 mg.L -1 media pengkaya (Chen et al, 2005), dan untuk larva udang Litopenaeus vannamei sebesar 50 mg.L -1 (Jusadi et al, 2011). Perbedaan dosis taurin di antara dua spesies ini bisa menjadi pertimbangan dalam menentukan dosis optimal taurin untuk pengkayaan rotifer sebagai pakan species larva ikan lain.…”

Membrane Lipid Microenvironment Modulates Thermodynamic Properties of the Na+-K+-ATPase in Branchial and Intestinal Epithelia in Euryhaline Fish In vivo

“…Unlike saturates and monoenes, which can be synthesized by most vertebrates, including marine fish, LCPUFA cannot be produced (or are produced in very limited amounts) and their needs are mostly covered by their food intake. Amongst most important LCPUFA fatty acids, those belonging to the n-3 series (n-3 LCPUFA) and n-6 series (n-6 LCPUFA) are considered essential (Sargent et al, 1995; Díaz and Marín, 2013; Spector and Kim, 2015), and their deficiency are associated with a number of pathophysiological conditions and with the failure in adaptive responses (Bell et al, 1986; Gerbi et al, 1993, 1994, 1998; Sargent et al, 1995; Bogdanov et al, 2008; Russo, 2009; Díaz and Marín, 2013; Matsunari et al, 2013). …”