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The use of neuroactive catecholamines to chemically induce metamorphosis of hatchery reared flat oyster, Ostrea angasi, larvae.


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O'Connor, S, Moltschaniwskyj, NA and O'Connor, W 2009 , 'The use of neuroactive catecholamines to chemically induce metamorphosis of hatchery reared flat oyster, Ostrea angasi, larvae.' , Aquaculture Research, vol. 40, no. 14 , pp. 1567-1577 , doi: 10.1111/j.1365-2109.2009.02203.x.

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Low numbers and unreliable wild catch of the native
£at oyster, Ostrea angasi, spat has resulted in
the NSW £at oyster industry being reliant on
hatchery-produced spat. The need to produce
culchless spat in the hatchery stimulated investigation
of several catecholamines to induce metamorphosis
in O. angasi larvae. Larvae were treated with
one of four neuroactive catecholamines (epinephrine,
epinephrine bitartrate, L-Dopa and GABA) at one
of four concentrations (103,104,105 or106 M)
for one of three treatment durations (0.5,1^2 h) to determine
morphogenic action for culchless spat production.
Epinephrine bitartrate at 103 and 104 M
and epinephrine at 103, 104 and 105 M, for a
treatment duration of 1^2 h, produced signi¢cantly
greater numbers of spat and culchless spat, compared
with any other treatment combination.
The other catecholamines tested did not induce a signi¢
cant increase in the total number of spat or culchless
spat, over untreated controls. Separate trials
found that long-termtreatment (24 h) with epinephrine
bitartrate and epinephrine at morphogenic concentrations
inhibited metamorphosis. Consecutive
daily use of epinephrine bitartrate increased the
numbers of spat and culchless spat produced, but
did not a¡ect larval or short-term post-larval survival.
Treatment with 103 M epinephrine bitartrate
or 104 M epinephrine for 1h is recommended for
routine commercial production of culchless £at
oyster spat.

Item Type: Article
Authors/Creators:O'Connor, S and Moltschaniwskyj, NA and O'Connor, W
Keywords: Ostrea angasi, catecholamine, epinephrine, epinephrine bitartrate, GABA, L-Dopa
Journal or Publication Title: Aquaculture Research
ISSN: 1355-557X
DOI / ID Number: 10.1111/j.1365-2109.2009.02203.x
Additional Information:

© 2009 NSW Department of Primary Industries
Journal Compilation © 2009 Blackwell Publishing Ltd

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