Nghiên cứu quy luật sinh trưởng của loài nghêu bến tre (meretrix lyrata) ở cửa sông bạch đằng và ý nghĩa cảnh báo môi trường hội nghị khoa học công nghệ biển toàn quốc lần thứ v tiểu ban sinh thái, môi trường và qu

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HOINGHI
•
•

K H O A H O C vA eO N G N G H t B IE N loA N Q uae
I

I .

LANTHUV
TUYEN TAp
B A o cA o
•

QUYEN5

SINH THAI, MOl TRUONG
. vAQuANLYBIEN
"

NHA XUAT BAN KHOA HOC
. TIT
. NHIEN vA CONG NGHE.

NHAXUA.T BAN KHOAHOC.

TUNHIENVACONGNGHE
ZYXWVUTSRQPONM
..
.

18 dirong Hoang QuBe Vi~t, C~u Gi~y, Ha NQi
DT: Phong Quan Iy TAng hQ1J:04.22149041;
Phong Phat

hanh:

04.22149040; Phong Bien t~p: 04.37917148

Fax: 04.37910147; EmaiI: ; www.vap.ac.vn

HOINGHI
•
•
KHOA HOe y A eONG NGHE BIEN
ToAN Q u a e LAN THU·Y

TIEU BAN SINH THAI, MOl TRUONG

C H !U T R A c H

N H II;M

XUAT

v A QUAN L Y BIEN

BAN

doc
VAN sA c

G ia m
TRAN

T o n g b ie n ta p
G S .T S K H .

In '2 0 0

se

culm

KHOA SON

x 2 7 cm ta i: N h a in K h o a h o c v a
1112-2011/CXB/005 - 1 5 /K H T N C N c a p

khb 19

dang ky K H X B :

N G U y f:N

Cong
ngay

In x o n g v a n Q P lu u c h ie u q u y IV n a r n 2 0 1 1 .

ngh$.

7/10/2011


TilillHGFEDCBA
b a n S in h th a i.

34.

M 6 i tr u o n g

va quan

I); B id n

qponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
VII

guy~n Huy Anh, Dinh Thanh

Kien

254

Danh gia tiern nang va dinh huong phat tri~n ben virng du lich bi~n - dao d~m pha tinh Thira Thien - Hu~
Assessment of tourism potentials and orientation of sustainable
the area of sea - island - lagoon in Thua Thien - Hue province

35.

Nguyen Thj Minh Huyen,

tourism

for

Chu Van ThuQc, Pharn Th~ Thu

261

Quan h~ gifra SIJ phat tri~n mat dQ cua quan xa thirc V?t phu du voi cac yeu
t6 moi twang
tai vung bi~n Quang Tri
Relations between development
density of phytoplankton
environmental
factors in Quang Tri coastal waters

36.

Le Xuan Sinh, Tdn

Nghien

communities

with

Du'c Th~nh, D~ng Kim Chi

ciru quy luat sinh twang

cua loai ngheu

269

(m e r e tr ix

ly r a ta )

a cira

'1 nghia canh bao rnoi twang
song Bach Dang va ZYXWVUTSRQPONMLKJIHGFEDCBA
Study on growth

of clam

(m e r e tr ix

ly r a /a )

and its environmental

indication

in Bach Dang estuary

37.

Chu Van
Terreton

ThuQc,

Patrice

Got,

Phan b6 tao nanophytoplankton,

Cao

Th]

Thu

picophytoplankton

Trang,

Jean-Pascal

va vi khu~n lam

276

a vung

cira song Bach Dang
Distribution

of nanophytoplankton,

picophytoplankton

and cyanobacteria

in

the Bach Dang estuary

38.

ve

l-Iai Thi,

r.s Hoai

Huong

284

Vi sinh V?t gay benh trong m6i quan h~ gifra moi twang
nuoi

c r a s s o s tr e a

Pathogenic
c r a s s o s tr e a

39.

v ir g in ic a

voi chat luong

hau

1971) tai d~m Nha Phu, Khanh Hoa.

bacteria

in the relations of environment
and quality of oyster
v i r g i n i c a (gmelin,
1971) at Nha Phu lagoon, Khanh Hoa

Nguy~n Xuan Thanh,
Nguon

(GMELIN,

Nguyen Du'c C", Dean Thj Nhinh

291

goc tich liiy mam benh gay ra dich benh lam hoang hoa cac ao nuoi

tom su
The insight of diseases

40.

in unculturable

ponds of tiger shrimp

L~i Thuy Hi~n, Nguy~n Thj Thu Huyen, DB Thu Phuong, Pham Thj
Hang, Ki~u Quynh Hoa, Vuong Th] Nga, Nguy~n Th] Yen, Hoang Van
Th~ng, Tdn Dinh M§n
Nghien

ciru da dang vi khu~n bi~n tao chat hoat hoa b~ mat sinh hoc nh~m

irng dung trong cong nghiep

va

xu

1 '1 0 nhiem moi twang

Study on the diversity of marine bacteria
to industry and environmental
treatment

producing

biosurfactants

to apply

297


Tidu ban Sinh thai, M6i truting va quan If

N G H IE N

CUU

(Meretrix Iyrata)

269HGFEDCBA

Q U Y qponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
LU~ T S I N H T R U O N G C U A L o A I N G H E U

0

CD A SO NG
BAo

Le

su»

X uan

B~CH

DANG

vA

Y N G H iA

C A .N H

M O l TRUO NG

S in h , T d n

Due Thanh,

D { in g K im

Chi

Vien Tai nguyen va M6i tnrong bien, 246- Duong Da Nang - Hai phong

Email:

T om

LKJIHGFEDCBA
t~ t

D(Lc trung cheft day cua biii ngheu vung ndm LKJIHGFEDCBA
a hai ben bo cua song Bach
D6ng thuong lit cat pha bun hlnh thanh do su tuong tac giiia dong chieu vit
dong chay cua song. Dong chay cua nuac vica p h a i vit duac tdp nhdn boi
nguon dinh d u iin g d6i d a o tit luc dia tao nen cdc biii trieu thudn loi cho su
p h a t trien cua con Ngheu. Nhu v¢iy, v o i cac d(Lc ddm thuy hoa, dong chay ma
quy trinh nuoi Ngheu a ctra song Bach Dang co mot s6 d(Lc ddm rieng so voi
cac khu v~rc khac nhu kich d l con gi6ng, thai gian tha gi6ng. Quy ludt phdt
tridn cua ngheu tuong ung giiia tu6i sinh truong vit kich thuoc vo dLWC xac
('+0.7455

dinh theo cong thuc la : y (thong tuoi) = e 1025. C a c giai doan p h d t tridn cua
ngheu chiu su tac dong cua moi trucng, vi v¢iy quy ludt sinh truong cua Ngheu
chi thi su thay d6i moi truong.

A b str a c t

STUDY

ON GROWTH

ENVIRONMENTAL

OF CLAM
INDICATION

(Meretrix lyrata) AND ITS
IN BACH

DANG

ESTURY

The characteristics of the clam ground substrate on both sides of the Bach
Dang estuary is usually muddy-sand formed by the interaction between tidal
and river flows, The medium flow receiving the rich nutrients from land
created the tidal flats which were suitable for the clam growth. Thus, there
were the special features in the process of clam culture in the Bach Dang
estuary which differed from the other areas to fit with the flow and hydrochemistry characteristics in the area, such as size of breeding clam and time
for stocking. The growth of clam correspondence between age and size of the
C+0.7455

shell is determined by the formula:
y (months) = e J : 0 2 5 , The growth stages
of clam had been affected by the environment variations, so the clam growth
indicated for the changes of environment.


270jihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA H(Ji nghi Khoa h9C

va

C6ng nghe bidn toan quoc Ian thu V qponm

1. Mo-LKJIHGFEDCBA
d ftu
Vung cira song Bach £)~ng thuoc ki~u vung cira song hinh pheu voi hai ben bo phan b6
cac bili trieu, la dia hinh quan trong nhit trong cac dang dia hinh bi ngap mroc theo chu kY
trieu, Bai trieu thirong la cat pha bun co cac ti~u hoan hru hinh thanh do SlJ nrong tac giira
dong chieu va dong chay cira song [2].V6'i nguon dinh duong phong phu do dong chay
mang ill luc dia ra vung cira song nen ngheu BSn Tre diroc nuoi tai day dang phat tri€n
manh. Chua co nghien ciru nao vS quy luat sinh tnrong cua con Ngheu ma chi do kich
thuoc Ngheu theo nghien ciru nho le va danh gia chi thi moi tnrong cua con Ngheu.

a khu vue cira song Bach D~ng co
Vi d?-c diem chit hrong rnroc, bai trieu, trao d6i mroc LKJIHGFEDCBA
net rieng so voi vung chau th6 nlnr bai Ngheu Nam Dinh nen con ngheu tai day phat tri€n
theo quy luat rieng. D~ xac dinh tuoi Ngheu thong qua kich tlnroc vo ma khong dn phai
phan tich sinh hoc la nghien ciru rit co y nghia trong khoa hQC va thuc ti~n, nham tang
nang suit va co giai phap phong tranh cac tac dong xiu cua moi tnrong.
2 . P h u rrn g

2 .1 .

phap

ttu ue«

Cac s6 lieu trong bai bao nay diroc trich ill dS tai luan an tien S1 "Nghien ctru kha ndng
tich liiy thuy ngdn trong ngheu Meretrix lyrata tai khu V l, l'C ctea song Bacti Dang" va luan
van thac S1 ill nam 2009 dSn nam 20 11 tai khu vue xil D6ng Bai, huyen Cat Hili, Hili
Phong,
2 .2 . P h u o n g p h tip

- Phuong phap nuoi ngheu ngoai hien
tnrong theo S6 tay huang d~n nuoi ngheu
cua MCD, 2009 [3].
- Do kich thuoc ngheu bang thuoc
Panmer, cac kich thuoc c~n do la: chiSu dai
x chien rong x chiSu cao (mm).
- Xac dinh guy luat sinh tnrong cua
Ngheu theo phuong phap binh phuong t6i
thieu phan tich ANOV A bang ph~n mern
Excel 2003.

Hinh

1 :Khu

nuoi ngheu 0'pham vi cua
song Bach Dang

V l! C

3. K~t qua

3.1. M{jt

sa dij.c diJm

chis y~u cua moi truong biii nuiii ngheu

- Nhiet ill): K~t qua quan tr~c nhiet do mroc cua bai nuoi Ngheu trong 12 thang (tit

thang 6/2010 dSn thang 5/2011) cho gia tri dao dong ill 15°C dSn 34°C, nhiet dO trung binh
la 25,1 0 c .


271
Tie'u ban Sinh thai, M6i trutrng va quan If Bidn qponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA

- Dc) muJi: Vao mua mua, dQ muo; trong mroc tai bai Ngheu thap (5%0), mang tinh ch~t
cua kh6i nuoc IQ'nhat. Vao mua kho, dQ mu6i cua mroc tang cao d~n 30%0, mang tinh chat
cua kh6i nuoc IQ'vira.
- pH: pH cua mroc khu V\IC song Bach D~ng co gia tri dao dong tir 6,4 d~n 8,3, trung
binh la 7,6. Nhan dinh nay phu hop voi cac k~t qua nghien ciru truce day [4,5].

..

- Chift rein LKJIHGFEDCBA
/ 0 ' lung: Ham IUQ'ng ch~t

r~n la lung khu V\IC cira song Bach
D~ng kha cao, dao dong khoang
159,1- 1383,2 mg/I, trung binh la
667,2 mg/l. Trang ngay, TSS dao
dong 16'n, ur 195 mg/I dEn 935 mg/I
(vao mua kho), trung binh la 440mg/l.
Vao mua mira, TSS trang ngay dao
dong khoang
159,1 - 1383,2 mg/I,
trung binh la 666 mg/l.
hu vay, ham
IUQ'ngTSS trong mroc r~t cao va b ] chi

phoi theo mua kha ro rang.
- Thanh phan

1000 00

50000

I

000

aidm

q lly

trinh

n u iii

Nglteu

•

Dot 1

Oqt2

Dot3

Dot 4

Oqt5

(1 1 6 )

(2 7 1 6 )

(2 7 fT )

(29/8) (2719) (30110) (4112)

biii Ngheu

cap hat cua bdi nuoi Ngheu:

cua

I

Dot6

Oqt7

Oqt8

Oqt9

(511) (2711)

Oqt10 Dot 11 Dot 12

(413)

(8 1 4 )

!

LKJIHGFEDCBA

(6JS)

Hinh 2: Bidn thien ham Luong TSS trong nutrc tai

75:24. Cac thong s6 phan tich thanh phan
nuoi Ngheu [1,3,6].
3.2. D ( lc

i
D~I

I

thi nghiem

Dang tram tich d~u la loai cat nho theo ty I~
IWt tr~m tich bai Ngheu kha phu hop voi

dp

0' kltu V { I'Ccica s o n g

B (1 c 1 1 D a n g

. Dong chay cua khu vue cira song Bach Dang quyet dinh phirong phap nuoi Ngheu tai
day. Duoi day la mot s6 d~c diem khac biet so voi vung nuoi nhir Nam Dinh:
- Cai tao biii: D6i voi bai trieu thap co ty I~ bun 16'n khoang 30-40% thi duoc barn cat
VaG bai, dQ day cua 16'p cat 15 ern la thich hop. Tuy nhien day la lach tau nen viec barn cat
co th~ lam sa b6i luong ma nha mroc hang nam phai bo nhi~u ti~n d~ nao vet.
- T h a i gian tha giJng: Hien tai Ngheu giong diroc tha t~p trung VaG mot dot b~t d~u tir
thang 5 am lich, tranh tha giong VaG cac thang 3 va thang 4 am lich vi Ngheu thuong bi
chet hang loat. Tuy nhien lai xay ra hien tuong khan hiem Ngheu giong, d~n d~n khong
ki~m scat duoc ch~t IUQ'ng nguon giong, Khi Ngheu dat kich thucc thuong pham cung luc
lam giam gia mua va nhu du tieu thu khong dap irng diroc h~t.

- Cii Ngheu g io n g : Kich co Ngheu giong t6t nh~t la khoang 400-500 con/kg. Chung toi
da tien hanh thi nghiern tha Ngheu giong - Ngheu t~m (2-3 nghin con/kg) va k~t qua la
giong bi phat tan 100%,
- Thu hoach: Chu y~u sir dung cao thu c c n g d~ thu hoach Ngheu, trong khi tai Nam
Dinh nguoi ta dung thuyen may 'd~ khai thac. Ngheu thu hoach tai day co trong IUQ'ng
khoang 45 -50 con/kg, Thai gian thu hoach di~n ra n r thang 2 d~n thang 5 dirong lich.


272 jihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
H9i nghi Khoa h9C va Cong ngM bidn loan quoc Idn thu V

N g h e u tit:khi thd gi6ng aJn thu hoach
3.2.1. Su' tang truong kich thuac cua LKJIHGFEDCBA

SIJ tang tnrong kich thuoc cua
Ngheu trong mot vu nuoi 12 thang,
k~ i l l khi tha giong o€n khi thu

hoach, duoc trinh bay tren hinh 3
dira van k€t qua 00 dac kich thiroc
vo Ngheu hang thang tai cac 0 thi
nghiern, voi s6 luong 80 con.

_O·TB

-

R-TB

5.00

4.00

3.00

2.00

1.00
'hangt~
0.00
7

6

9

12

10

13

15

16

17

18

Hinh 3: BiJn thien kich thutrc trung binh cua Ngheu
tai khu v~'c cua song Bach Dang

Tir k€t qua nghien ciru cho thay, bien dong kich thuoc cua Ngheu nr luc tha giong o€n
i l l 2,12 - 4,05 em; chi~u rong i l l 1,78 - 3,29cm; chi~u cao
tnrong thanh nhir sau: chi~u daiLKJIHGFEDCBA
i l l 1,1 o€n 2,16 ern.
K€t qua phan tich ANOYA giira ba nhan t6 (chieu dai, cao va rong trung binh) cua
gheu tai cira song Bach D~ng cho F =33 < Fa« = 3.28 chap nhan HIla c6 SIJ sai khac v~
quy luat phat tri~n giira cac kich thiroc khac nhau cua Ngheu diroc 00. en quy lu?t sinh
tnrong giira thang tu6i va kich thiroc tuy thuoc chon bi€n s6 chieu dai, chi~u rong hay
chieu cao.
3 .2 .2 .

Xu' If; s6 lieu va tim quy ludt

Theo oi~u tra khao sat thirc t€ Ngheu giong tha tai cac bai nuoi
6 thang tuci, qua phong nuoi va ba giai doan irorn giong.

(y

cira song Bach D~ng la

Kich thiroc 0 0 tai dot 2 (Ngheu diroc 8 thang tuoi) c6 t6c 0 ( > phat tri~n cham la do
gheu rnoi diroc tha trong 1 thang dn c6 thai gian lam quen voi moi twang tai cira song
Bach D~ng. hir vay, t6c 0 ( > phat trien cua Ngheu dot nay khong phan anh chinh xac t6c
0 ( > sinh tnrong cua Ngheu nuoi tai d a y nen loai bo s6 lieu nay.
Xac dinh duoc quy lu?t phat tri~n Ngheu va kich thiroc theo chieu dai, chi~u rong hoac
chieu cao duoc th~ hien nhir sau:
0+0.8075

R+0.7342

y (thang tuoi) = el:i057 = e 1.4237 = e

C+0.7455

(3.l)

1025

Trang 06: D - Chi~u dai (ern); R - Chieu rong (em); C - Chi~u cao (cm).
K~t qua kiem tra sai s6 khi tinh thang tu6i theo kich thiroc vo cua
tren bang 1.

Bans;

1.

gheu duoc th~ hien

Sai so phdn tram (%) tinh tuoi Ngheu theo ale kich thuoc khac nhau
Sai

s6

trung binh

Thang tuoi tinh theo chieu dai (%)

7,2

Thang tu6i tinh theo chieu rong (%)

7,1

Thang tuoi tinh theo chieu cao (%)

6,6


va

273
t u « jihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
ban Sinh thai, M6i truong
quan If; Bdn qponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA

Nhir vay, sai s6 trung binh tu6i Ngheu tinh theo chieu rong 1£1thap nhat (6,6%) nen
C+O.7455

= e~
(3.2) diroc xac dinh d~ xac dinh tu6i Ngheu thee kich
cong thirc y (thang tuoi) LKJIHGFEDCBA
thiroc vo.

4.Thaolu~n

4.1. Ciing thuc 3.2
Cong thirc nay cho thay quy lu~t phat trien cua Ngheu giira tu6i va chieu cao thee ham
s6 mfi. Nhir vay, tuy van nrng giai doan va d~n nguong nh~t dinh thi Ngheu Ian cham nen
Ngheu a day thirong duoc thu hoach sau 1 nam nuoi.
So sanh voi k~t qua nghien ciru cua Truong QuocPhu d6i voi Ngheu B~n Tre nuoi tai
cac bai trieu tai mien N am c6 th~y rang, quy luat ciing bien thien theo ham s6 mii. Tuy
nhien, khi kiern tra cong thirc nay d6i voi Ngheu nuoi a cira song Bach D~ng cho k~t qua
khong phu hop.
Nhir vay, tuy thuoc van diSu kien nr nhien ma quy luat phat tri~n cua Ngheu 1£1khac
nhau tai cac vung miSn.

4.2. Ttu: il~ng cua moi truong tOi quy lu~t phtit triin cua Ngheu
K~t qua nghien ciru cho thay, qua trinh phat trien cua Ngheu a vung nghien ciru c6 th~
chia ra 3 giai doan. Tir thang 6 d~n thang 10/2010 Ngheu Ian nhanh (giai doan 1) va Ian
cham nr thang 1112010 d~n thang 112011 (giai doan 2), sau do Ngheu Ian nhanh a giai
doan thu hoach nr thang 2 d~n thang 5/2010 (giai doan 3).

a. Giai doan 1
Giai doan I (sau mot thang k~ nr khi tha
giong - thang 7) Ngheu c6 t6c dQ Ian cham (hinh 3).

Sa di nhir vay c6 th~ 1£1do Ngheu duoc tha nr cac h6
irorn giong ra

bai nuoi nen c6 sir thay d6i vS moi

tnrong dQt ngot, diSu nay doi hoi Ngheu phai c6 thai
gian thich

nghi.

Sau do,

ill

thang

7 d~n thang

10/2010, Ngheu Ian r~t nhanh. Sir phat trien vS chieu
rong duoc nhan biet qua mau s~c vo va van sinh

Hinh 4: Vaclt phdn chia su sinh
truong cua N g h e u

tnrong.
Giai doan nay 1£1m ua rmra, mroc song mang nhiSu v~t chat dinh dirong nr luc dia ra cira
song lam cho nguon thirc an phong phu. Ham hrong TSS trong cac thang 7, 8, 9 c6 gia tri
trung binh nr 731 d~n 875 mg/l, gia tri cue dai trong thang 8 dat 1382 mg/l.
.

274 jihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
H9i nghi Khoa

h9C

va

Cong ngh¢ bien toan qu6c Idn thir V

b. Giai doan 2
K~t qua giai ph§.u Ngheu trong giai
doan nay cho thfty co the Ngheu ti~t ra
tuyen nhon (hinh 5). Day hi bi~u thi sinh ly
cua Ngheu khi bi anh huong cua moi
tnrong. Xac suat co mat cua tuyen nhon
trong ruot Ngheu la 98%. Tuy~n nhon co
mau hong trong suot dai 1em hinh sung
trau. Theo nghien ciru cua Tnrong Quoc
Phu (1999), day la mot trong nhirng bi~u
hien cua sir trao d6i mroc kern khi thuy
tri~u rut luc mroc dirng hoac dong chay
cham.

Hinh 5: Tuyen nhon trong ruot Ngheu

Hien nrong nay xay trong giai doan mua kho khi ma song gio dil keo cac v~t chftt dinh
dirong ra bien, nguon dinh duong cung dp nr dftt lien thap, th~ hien (y ch6 ham hrong TSS
trong cac thang 11, 12 trung binh la 355-392 mg/l, thap so voi trung binh cua cac dot khao
sat (hinh 2).

Day la dau hieu chi thi moi tnrong cua Ngheu d~ cac hQ nuoi co giai phap phong tranh
phu hop, cu th~ nhir:
- Dan mat dQ Ngheu

(y

nhirng vi tri co Ngheu phan b6 day.

- Chuyen Ngheu phan b6
c.

(y

phia bai trieu cao xuong phi a bai tri~u thap.LKJIHGFEDCBA

Giai doan 3

Giai doan 3 (nr thang 2 d~n thang 5): Ngheu phat trien t6t hon giai doan 2. Day la giai
doan co th~ thu hoach Ngheu khi khoi IUQ'ngdat nr 68 d~n 52 con/kg. 6 giai doan 3 Ngheu
dil dat kich thiroc thuong pham nen co kha chong chiu voi sir thay d6i moi tnrong (thang 23 am lich). Vao thai diem nay nguoi ta khuyen cao khong nen tha giong vi kha nang chong
chiu sir thay d6i moi truong cua Ngheu con thirong thap. D~c biet la giai doan rmra phun
nen trong khoang thai gian phoi bai Ngheu thuong bi anh huong cua mroc ngot, d§.n den
bien nrong s6c va chet.HGFEDCBA
5 . K ~ t lu ~ n

Voi cac d~c trung thuy hoa, dong chay d~c thu ma quy trinh nuoi Ngheu (y cira song
Bach D~ng co mot s6 d~c di~m rieng so voi cac khu VlJC khac nhir kich cO-con giong, thai
gian tha giong.
Quy luat phat tri~n cua Ngheu tuong irng giira tuoi sinh tnrong va kich thiroc vo. Sai s6
trung binh tu6i Ngheu tinh theo chien rong la thftp nhat (6,6%) nen cong thirc diroc Slr

dung d~ xac dinh tu6i Ngheu theo kich thuoc vo la:
C+0.7455

y (thang tuoi)

=

e

1025

,trong

do C: la chi~u cao cua vo.


-rdu ban Sinh thai, M6i trirong va quan LKJIHGFEDCBA
Iy Bidn

275

Qua trinh phat tri~n cua Ngheu co baa giai dean tuong irng voi SI,I tac dong cua moi
tnrong.
htr vay, quy luat sinh tnrong cua Ngheu chi thi SI,I thay d6i moi truong.
6. Lo'i earn LKJIHGFEDCBA
0 '0

Tac gia xin earn an SI,I giup d O ' t?n tinh cua thay, co giao huang d~n (GS.TS Dang Kim
Chi, PGS.TS. Tr~n Dire Thanh), cua can b<) Vien Tai nguyen va Moi truong bien va cac h<)
dan khu VI,IC xi} D6ng bai, huyen Cat I-Hi, Hai Phong d~ tac gia hoan thanh nghien ciru nay.

TAl LI~U THAM KHAo
1. Truong Quoc Phu, "Nghien cuu 1119ts 6 tI(tc tlidm sinh h9C, sinh hoa va kji thudt nuoi
ngheu Meretrix lyrata (Sawerby) dat ruing sudt caa ", Luan an Tien si, Dai hoc C~n Tho,
(1999).

2. Tr~n Dire Thanh, Nguyen Can, Dang Dire Nga, "Ban ch6t c d u true estuary cua vung
cira song Bach Dc7ng", Tuy~n tap tai nguyen moi tnrong bien, t?P VII, pp 35-50 (2000).
Trung tam baa ton Sinh vat bi~n & Phat tri~n Cong dong (MCD),
thudt nuoi ngaa, Ha N o i . Vi~t Nam (2009).
3.

s 6 lay huang d6n fry

4. Cao Thi TIm Trang, Le Xuan Sinh va nnk, "Baa cao tong kdl tlJ tai: Danh gid SLI'Ctai
moi truong ala song Bach D{lI1g va tld xudt cac gicii phdp baa V ? moi truong, phat Iridn
bdn viing ", Liru trfr tai TIm vien Vien Tai nguyen va Moi t r u o n g bien, (2009).
Chu Van Thuoc, Baa cao khoa hQC tong ket Nhi?111V ( J HTQT Viet-Phap "Nghien ciru
anh huang nhdn sinh va thuy d o n g luc toi cac qudn xd thuc v(J1phu du va vi khu6n ", Luu
tnr tai TIm vien Vien Tai nguyen va Moi tnrong bi~n (2010).
5.

6. Nguyen Huy Yet, "Bela cao tong kit tld tai: Nghien cuu hien trang va cac gia! phap
baa v¢ "il phat Iridn vung ngheu gi6ng ven bidn Nom Dinh ". LUll trir tai TIm vien Vien Tai
nguycn va Moi truong bien (2008).

Nguoi doc

n lz ( 1 Il

xet: TS. Cliu Viin Th u iic