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Food Value of Cyclopoid Copepod, Paracyclopina nana for Flounder Paralichthys olivaceus Larvae

넙치자어에 대한 cyclopoid copepod, Paracyclopina nana 의 먹이효과

  • Lee, Kyun-Woo
  • 이균우
  • Received : 2018.10.04
  • Accepted : 2018.11.02
  • Published : 2018.11.30

Abstract

This study investigated the food value of Paracyclopina nana for flounder Paralichthys olivaceus larvae in two feeding stages, rotifer (for 12 days) and Artemia (for 16 days). In the rotifer feeding stage, survival and growth of flounder larvae in the only P. nana (nauplii) feeding experiment were higher than in the only rotifer feeding experiment on 12 DAH (days after hatching). In the Artemia feeding stage, the growth of flounder larvae in the only P. nana (C4-adult) feeding experiment and mixture feeding experiment (P. nana+Artemia) were higher than in other experiments on 30 DAH, but the survival of flounder larvae did not differ significantly among experiments. The n-3 HUFA contents of nauplius and C4-adult were 4.0% and 5.4%, respectively. Overall the results of this study indicate that the brackish water cyclopoid copepod, P. nana, is an effective live food organism for larval seedling production of marine fish.

Keywords

Copepod;Paracyclopina nana;Paralichthys olivaceus;food value;live food

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Fig. 1. Growth (A) and survival (B) of Paralichthys olivaceus larvae fed different diets (C, copepod 100%; CR, copepod 50% + rotifer 50%; R, rotifer 100%) on 12 DAH (days after hatching). Different letters indicate a significant difference (P<0.05).

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Fig. 2. Growth of Paralichthys olivaceus larvae fed different diets on 30 DAH (days after hatching) [C, copepod 100%; CA, copepod 50% + Artemia nauplius 50%; A, Artemia nauplius 100%; CA5, fed C from 14 DAH to 18 DAH and then A from 19 DAH] from 14 DAH to 30 DAH at Artemia nauplius feeding stage. Different letters indicate a significant difference (P<0.05).

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Fig. 3. n-3 HUFA contents (% dry weight) of food organisms fed to Paralichthys olivaceus larvae. Rotifer and Artemia were enriched with A1 Super Selco®.Copepod nauplii and adults were enriched with Tetraselmis suecica.

Table 1. Fatty acids composition (% of total fatty acids) of food organisms fed to the flounder Paralichthys olivaceus larvae. Rotifer and Artemia were enriched with A1 Super Selco. Copepod nauplii and adults were cultured with Tetraselmis suecica*

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Table 2. Fatty acids composition (% of total fatty acids) of Paralichthys olivaceus fed different diets on twelve days after hatching*

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Table 3. Fatty acids composition (% of total fatty acids) of Paralichthys olivaceus fed different diets on 30 DAH*

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Acknowledgement

Supported by : 한국해양과학기술원