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Progress of Joint Research Activities

Research No. 3: TC Model Joint Research (Aquaculture and Fisheries) D Daattee:: NNoovv.. 1111 ,, 22001199
t thh
Effects of increased carbon dioxide (CO ) concentration and temperature
1 G Geenneerraall TTiittllee 2
on important aquaculture species in the Mekong Delta, Viet Nam
C CTTUU::
D Doo TThhii TThhaannhh HHuuoonngg ((PPrroojjeecctt LLeeaaddeerr)),,Tran Minh Phu (Project Secretary), Tran Ngoc Hai, Nguyen Thanh Phuong, Chau Tai Tao,
Bui Minh Tam, Nguyen Thi Kim Ha (Contact's person), Nguyen Hieu Trung and Van Pham Dang Tri.
2 C Coorree MMeemmbbeerrss
J Jaappaanneessee UUnniivveerrssiittiieess:
OHSHIMA Toshiaki (TUMSAT), TAKAGI Yasuaki (Hokkaido), HARADA Kazuo (Osaka), KOSHIO Shunsuke (Kagoshima),
FUJINO Tadanori (Nagasaki), ISHIMATSU Atsushi (Nagasaki), UTSUNOMIYA Yuzuru (Nagasaki).
3 D Duurraattiioonn A Auugg.. 22001166 –– AAuugg.. 22001188 ((22 yyeeaarrss))
The overall objective of the project is to assess the potential impacts of climate change (CC) on selected aquatic species of
commercial importance in order to propose proper adaptation for sustainable development. The specific objectives of the
4 M Maaiinn OObbjjeeccttiivveess project is (1) to monitor and stimulate the changes of CO 2 and temperature in air and aquaculture ponds; (2) to understand
the impact level of CO 2 and temperature raised due to climate change on various developmental stages of selected culture
species including striped catfish (Pangasianodon hypophthalmus), black tiger shrimp (Penaeus monodon) and white-leg shrimp
(Penaeus vannamei); and (3) to suggest feasible adaptation solutions for sustainable farming.
A A.. RREESSEEAARRCCHH AACCTTIIVVIITTIIEESS
There are 2 main work packages (WP) including WP1 research activities at CTU and WP2 collaborative research activities with
Japanese Universities. The details of research works are presented in the below diagrams

B B.. RREESSUULLTTSS
1. Field survey of CO 2 in shrimp ponds: High variation of
all parameter by time and depth CO 2 : 2.5 to 5.6 mg/L
(shrimp ponds) and max 55 mg/L in striped catfish From left to right: experimental tanks, glass containers, striped catfish,
ponds – CO 2 at bottom of catfish pond is high at the end whiteleg shrimp and black tiger shrimp
of the culture cycle.
5 5.. SSttaaffff ttrraaiinniinngg aatt NNaaggaassaakkii UUnniivveerrssiittyy aanndd tthhee UUnniivveerrssiittyy ooff
2. Effects of CO 2 and temperature on striped catfish T Tookkyyoo:: there were four staff members participated in training
(Pangasianodon hypophthalmus): Embryonic in Japanese Universities including Do Thi Thanh Huong (in NU
development time was longer and the hatching rate was and UT), Chau Tai Tao (NU), Tran Ngoc Hai and Nguyen Thanh
low in high CO 2 concentrations. Embryos were not able Phuong (NU) and Nguyen Thi Kim Ha (UT).
5 F Fooccaall PPooiinnttss to develop at conditions of above 36˚C. The growth
performance of the fish decreased high CO 2 6 6.. RReesseeaarrcchh oouuttppuuttss:: attended 2 international conferences in
Vietnam and Belgium with poster and oral presentations, 2
concentration.
full paper in Vietnamese, 1 paper in conference proceedings
3 3.. EEffffeeccttss ooff CCOO 22 aanndd tteemmppeerraattuurreess oonn wwhhiittee--lleegg sshhrriimmpp in English, trained 1 PhD (on progress), and 4 MSc. and 10 BSc.
( (PPeennaaeeuuss vvaannnnaammeeii)):: The embryo could develop at 34˚C (completed).
with high hatching rate (44%). The growth of shrimps
were high in 34˚C, in contrast the survival rate was high A
in 27˚C. The embryo could not develop when pH
decreased to 6.8. The larvae could not grow to PL15 in
the water with pH=7.2. The growth and survival rates of
shrimp decreased with the increase of CO 2 concentration
(pH 6.8 and 7.2) .
4 4.. EEffffeeccttss ooff CCOO 22 aanndd tteemmppeerraattuurreess oonn bbllaacckk ttiiggeerr sshhrriimmpp
( (PPeennaaeeuuss mmoonnooddoonn)):: The embryo and larvae were B
undeveloped at 34˚C; all stages of shrimp grew fast at
33-34˚C but the survival rate was high at 27˚C; the
shrimp could not survive at 36˚C. At high CO 2
concentrations in water (pH=6.8 and pH=7.2), the
embryonic stage of shrimp developed but larvae could
not grow normally. The growth and survival rate of Abnormal development of embryos of striped catfish was
shrimp decreased at pH7.2. The correlation between CO 2 concentration, temperature observed under microscope (40x magnification) in
and time in white leg shrimp (A) and black tiger shrimp
treatments under combination effect of temperature and
(B) pond. CO 2.
6 Comments
ⓒ All Rights Reserved, Dec. 2019 (CTU) The research works were completely conducted, final report and papers are in writing process.

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