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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Tran Vinh Phuong1, Hoang Thi Van Anh2, Le Thi Nhu Phuong3 and Nguyen Quang Linh1
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DOI:10.17265/2161-6256/2015.12.014
Affiliation(s)
1. Center for Incubation and Technology Transfer, Hue University, 07 Ha Noi Street, Hue City 47000, Vietnam
2. Faculty of Fisheries, College of Agriculture and Forestry, Hue University, 102 Phung Hung Street, Hue City 47000, Vietnam
3. Faculty of Pre-School Pedagogy, Ha Long University, 58 Nguyen Van Cu, Ha Long City, Quang Ninh 20000, Vietnam
ABSTRACT
The study aimed
to investigate biological characteristics and distribution of a new
fish species Giant trevally (Caranx
iginoblis) in Tam Giang-Cau Hai lagoon systems and preliminarily discover the
reproductive abilities of a migration species from sea into lagoon. Results
showed that the species appeared in the lagoon since 2005 and farmers started raising by cages at
Tu Hien estuary and Loc Binh area for well-growing and a best market to consumers.
There were distributed of the fingerlings from sea into lagoon from October to
December through inlets, so
fishermen can collect every year by bottom nets and enclosed net. Fish heads
are growing a faster than other species, but not sustainable development of the culture model.
Besides, wild fish also can
be collected by fishmen at inlets with the bigger of averaged body weight 1.99 ± 1.22 kg and length 45.66 ±
17.56 cm. The species are big mouth and contained sharp teeth. There are flat
body and head length, pectoral fin rays, dorsal and anal yellow, gray dorsal, and ventral surface is
silver white. They adapted in water environmental conditions of pH (7.1-8.5), dissolved
oxygen (DO) (2.7-4.5 mg/L), salinity
(17.0‰-33.3‰) and
temperatures (16.8-32.5 °C). The reproductive performance of 50 fish samples, which
were detected on mature female fish and male fish for eggs or spermatorrhoea, respectively, was investigated.
Results of slices on gonads in stages I, II and III showed
that the germplasm is a special source of valuable genes of
the species and local aquatic resources.
KEYWORDS
Giant trevally, lagoon, biological features, distribution, characteristics.
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