Vannamei Shrimp
is also known as Penaeus Vannamei in Latin.
When raw, it is grey or green in colour, and
cooks to a nice red color. It is mainly a tropical
shrimp. It's average size is 60/80 HO. The farmed
Vannamei Shrimp is particularly resistant to
melanosis and keeps a very good appearance even
3-4 days after defrosting at refrigerated temperature.
The Vannamei
Shrimp has some distinguishing features. The
rostrum is armed with dorsal and usually has
between 2-4 or 5-8 ventral teeth which are moderately
long. The young Vannamei Shrimp has a distinctly
surpassing antennular peduncle. These are shorter
in adults.
This species
has six nauplii stages, three protozeal stages,
and three mysis stages in its life history.
The CL of Vannamei Shrimp postlarvae range from
0.88 to 3.00 mm. The larval stages (1.95 - 2.73
mm CL) can be recognized by the lack of a thoracic
spine on the 7th sternite, and relative rostral
length against the length of eye plus eye stalk
ranges from 2/5 - 3/5, rarely 4/5.
The most distinguishable
morphological character is the development of
supraorbital spines in the second and third
protozoea)..
The color of
the Vannamei Shrimp is translucent white. The
body of the species often has a bluish hue that
is due to a predominance of blue chromatophores
which are concentrated near the margins of the
telson and uropods. It usually grows to about
230 mm or 9 inches.
This marine shrimp
likes muddy bottoms at depths from the shoreline
down to about 72 meters or 235 feet.
In Vannamei Shrimp,
the carapace is translucent, permitting the
color of the ovaries to been seen. In females,
the gonad which is first whitish, turns golden
brown or greenish brown on the day of spawning
. The males deposit the spermatophores only
on hard-shell females which will spawn a few
hours later. The courtship and mating behavior
begins in the afternoon in relation to light
intensity. Regression of developing ovaries
is very rare and development of the ovaries
leads almost every time to spawning. The spawning
process, begins by sudden jumps and active swimming
of the female and the whole process lasts about
one minute.
Several penaeid
shrimp species in aquaculture in the Southeast,
carry several disease pathogens, and various
bacterial, fungal, and viral infections . L.
vannamei is a known carrier of Baculovirus penaei
(BP), Infectious hypodermal and hematopoietic
necrosis virus (IHHNV), Reo-like virus (REO),
and Taura Syndrome virus (TSV). This viruses
can be transmitted to native wild penaeid shrimp
populations, and thus increases the concern
if the disease is introduced by releases from
culture facilities.
Head Office:
Siam
Canadian Foods Co., Ltd.
9th Floor, Suite 283/44, Home Place Office Building.
283 Thonglor 13, Sukhumvit 55
Kongton Nua, Wattana, Bangkok 10110,
THAILAND
Call us at +66-2-185-3311
Fax: +66-2-185-3317
E-mail: info@siamcanadian.com
