Minimizing the use of fish oil enrichment in live feed by use of a self-enriching calanoid copepod Pseudodiaptomus annandalei

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Unlike some harpacticoid and cyclopoid copepods, calanoid copepods are considered unable to enhance their highly unsaturated fatty acid (HUFA) profile in sufficient quantities if at all. This study demonstrates the capability of significant HUFA enhancements in the calanoid Pseudodiaptomus annandalei when cultured on Tetraselmis chuii, a relatively HUFA poor microalgae. A 48 h growth trial using newly spawned nauplii revealed adequate daily specific growth (0.31 ± 0.06 d−1) when fed T. chuii. Another seven day trial was conducted where nauplii were cultured to adult stage while fed T. chuii. Fatty acids profiles were analysed in P. annandalei adults and next generation nauplii, which were then compared to the fatty acid profile in algal feed. Abundances of C20:2n−6, C20:3n−3 and C22:6n−3 were observed in the copepods but never in the algal feed. Copepod C22:6n−3 contents were 4–8 mg g−1 dry weight, which is comparable to what has been observed in traditional live feeds. As P. annandalei tend to dominate habitats with changing food quality, the food environment may act as a selective force on the organism's ability to enhance its HUFA profile, irrespective of taxonomic order. Hence P. annandalei demonstrates good potential as nutritious live feed in extensive aquaculture.
OriginalsprogEngelsk
TidsskriftJournal of Plankton Research
Vol/bind39
Udgave nummer6
Sider (fra-til)1004-1011
Antal sider8
ISSN0142-7873
DOI
StatusUdgivet - 2017

Citer dette

@article{c6a82c3d2a324ff38a7197728e4cdbbf,
title = "Minimizing the use of fish oil enrichment in live feed by use of a self-enriching calanoid copepod Pseudodiaptomus annandalei",
abstract = "Unlike some harpacticoid and cyclopoid copepods, calanoid copepods are considered unable to enhance their highly unsaturated fatty acid (HUFA) profile in sufficient quantities if at all. This study demonstrates the capability of significant HUFA enhancements in the calanoid Pseudodiaptomus annandalei when cultured on Tetraselmis chuii, a relatively HUFA poor microalgae. A 48 h growth trial using newly spawned nauplii revealed adequate daily specific growth (0.31 ± 0.06 d−1) when fed T. chuii. Another seven day trial was conducted where nauplii were cultured to adult stage while fed T. chuii. Fatty acids profiles were analysed in P. annandalei adults and next generation nauplii, which were then compared to the fatty acid profile in algal feed. Abundances of C20:2n−6, C20:3n−3 and C22:6n−3 were observed in the copepods but never in the algal feed. Copepod C22:6n−3 contents were 4–8 mg g−1 dry weight, which is comparable to what has been observed in traditional live feeds. As P. annandalei tend to dominate habitats with changing food quality, the food environment may act as a selective force on the organism's ability to enhance its HUFA profile, irrespective of taxonomic order. Hence P. annandalei demonstrates good potential as nutritious live feed in extensive aquaculture.",
author = "Rayner, {Thomas Allan} and Jiang-Shiou Hwang and Hansen, {Benni Winding}",
year = "2017",
doi = "10.1093/plankt/fbx021",
language = "English",
volume = "39",
pages = "1004--1011",
journal = "Journal of Plankton Research",
issn = "0142-7873",
publisher = "Oxford University Press",
number = "6",

}

Minimizing the use of fish oil enrichment in live feed by use of a self-enriching calanoid copepod Pseudodiaptomus annandalei. / Rayner, Thomas Allan; Hwang, Jiang-Shiou; Hansen, Benni Winding.

I: Journal of Plankton Research, Bind 39, Nr. 6, 2017, s. 1004-1011.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Minimizing the use of fish oil enrichment in live feed by use of a self-enriching calanoid copepod Pseudodiaptomus annandalei

AU - Rayner, Thomas Allan

AU - Hwang, Jiang-Shiou

AU - Hansen, Benni Winding

PY - 2017

Y1 - 2017

N2 - Unlike some harpacticoid and cyclopoid copepods, calanoid copepods are considered unable to enhance their highly unsaturated fatty acid (HUFA) profile in sufficient quantities if at all. This study demonstrates the capability of significant HUFA enhancements in the calanoid Pseudodiaptomus annandalei when cultured on Tetraselmis chuii, a relatively HUFA poor microalgae. A 48 h growth trial using newly spawned nauplii revealed adequate daily specific growth (0.31 ± 0.06 d−1) when fed T. chuii. Another seven day trial was conducted where nauplii were cultured to adult stage while fed T. chuii. Fatty acids profiles were analysed in P. annandalei adults and next generation nauplii, which were then compared to the fatty acid profile in algal feed. Abundances of C20:2n−6, C20:3n−3 and C22:6n−3 were observed in the copepods but never in the algal feed. Copepod C22:6n−3 contents were 4–8 mg g−1 dry weight, which is comparable to what has been observed in traditional live feeds. As P. annandalei tend to dominate habitats with changing food quality, the food environment may act as a selective force on the organism's ability to enhance its HUFA profile, irrespective of taxonomic order. Hence P. annandalei demonstrates good potential as nutritious live feed in extensive aquaculture.

AB - Unlike some harpacticoid and cyclopoid copepods, calanoid copepods are considered unable to enhance their highly unsaturated fatty acid (HUFA) profile in sufficient quantities if at all. This study demonstrates the capability of significant HUFA enhancements in the calanoid Pseudodiaptomus annandalei when cultured on Tetraselmis chuii, a relatively HUFA poor microalgae. A 48 h growth trial using newly spawned nauplii revealed adequate daily specific growth (0.31 ± 0.06 d−1) when fed T. chuii. Another seven day trial was conducted where nauplii were cultured to adult stage while fed T. chuii. Fatty acids profiles were analysed in P. annandalei adults and next generation nauplii, which were then compared to the fatty acid profile in algal feed. Abundances of C20:2n−6, C20:3n−3 and C22:6n−3 were observed in the copepods but never in the algal feed. Copepod C22:6n−3 contents were 4–8 mg g−1 dry weight, which is comparable to what has been observed in traditional live feeds. As P. annandalei tend to dominate habitats with changing food quality, the food environment may act as a selective force on the organism's ability to enhance its HUFA profile, irrespective of taxonomic order. Hence P. annandalei demonstrates good potential as nutritious live feed in extensive aquaculture.

U2 - 10.1093/plankt/fbx021

DO - 10.1093/plankt/fbx021

M3 - Journal article

VL - 39

SP - 1004

EP - 1011

JO - Journal of Plankton Research

JF - Journal of Plankton Research

SN - 0142-7873

IS - 6

ER -