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MINISTRY OF EDUCATION AND TRAINING
NHA TRANG UNIVERSITY
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NGO VINH HANH
RESEARH ON ARTIFICIAL SEED
PRODUCTION OF TRIPLETAIL
(LOBOTES SURINAMENSIS BLOCH, 1790)
Major: Aquaculture
Major code: 9620301
SUMMARY OF DOCTORAL THESIS
Khanh Hoa – 2019
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Research was accomplished at Nha Trang University
Supervisors:
1. Dr. Pham Anh Tuan
2. Dr. Le Anh Tuan
Referee 1: Associate Prof. PhD Ton That Chat
Referee 2: PhD Truong Ha Phuong
Referee 3: Associate Prof. PhD Vu Ngoc Ut
The thesis was defended at the committee of doctorate
thesis examiners of University in Nha Trang University
at …………………..
The thesis can be found at:
…………………………………………..
…………………………………………..
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KEY FINDINGS
The thesis project is the first study on reproductive
characteristics and technological solutions to artificial propagation of
tripletail fish (Lobotes surinamensis Bloch 1790) in Vietnam.
Through the research, some reproductive traits of tripletail fish
in the culture condition are identified, including: reproductive season
occurs naturally from August to September annually; the first
maturation age of the male and female is 0+ and 1+, respectively; the
absolute fecundity ranges between 6,840,787 and 12,294,400 eggs
per female whose total body weight is from 3.7 to 5.7 kg each; the
relative fecundity ranges from 1,849 to 2,542 eggs per 1 gram of
female body weight (average = 2,306±283 eggs per 1 gram of female
body weight).
In this study, suitable technical parameters were identified to
develop the artificial fish propagation protocols for tripletail fish,
such as: using fresh cuttle-fish as broodstock food results in the best
performance in maturation, fertilization, hatching and fish larval
rates, and survival rate of fish larvae at the age of 3 days after
hatching; using LHRH-a with dosage of 20µg+2mg DOM per 1 kg
of female body weight results in the best performance; the optimal
incubation density is between 1,500 and 2,000 fertilized eggs per
litter of sea-water; using a combination of live micro-algae, rotifers
and copepods as fish larvae’s food results in the highest survival rate;
the tripletail fish larvae which are reared with the density of 30
individuals per litter and at the salinity between 25 and 30 ppt have
higher growth and survival rate.
Ph.D Student
Ngo Vinh Hanh
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LIST OF PUBLICATION AND CONFERENCE
1. Ngo Vinh Hanh, Nguyen Huu Ninh, 2016. Research on
nursing of Tripletail (Lobotes surinamensis Bloch, 1790).
Science and Technology Journal of Agriculture and Rural
Development, pp. 93-98.
2. Ngo Vinh Hanh, Nguyen Huu Ninh, 2015. Research on
reproductive characteristics of Tripletail (Lobotes
surinamensis Bloch, 1790) under artificial condition.
Science and Technology Journal of Agriculture and Rural
Development, pp. 65-70.
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INTRODUCTION
Tripletail (Lobotes surinamensis Bloch, 1790) is a very
potential aquaculture species due to its rapid growth and high meat
quality (Jason, 2011). The tripletail is natural distribution in coastal
and offshore areas from North to South of Vietnam. Cage culture of
this species is very popular in coastal areas including Quang Ninh,
Hai Phong provinces.
In order to develop tripletail for aquaculture, source of
fingerling is main limited, this issue is not only for tripletail but also
for other marine species in Vietnam. Therefore, it is necessary to
study artificial propagation of tripletail (Lobotes surinamensis Bloch,
1790).
Aims of study: Establishment of procedure for artificial propagation
of tripletail.
Main activities of the study:
1. Study on reproductive characteristics of tripletail in
captive condition.
2. Study on broodstock management and husbandry.
3. Study on induce breeding.
4. Study on nursing from larvae to fry and fingerling.
Scientific and practical application of the study:
For scientific: The research results provide scientific data for
artificial seed production of tripletail. In addition, the achieved
results are also reference for other valuable marine fish species of
similar biological characteristics.
For practical: Building up procedure for artificial seed
production of tripletail that contribute to diversify marine
aquaculture fish species and preserve natural resources.
New findings:
