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ANH Hl/ONG CUA DO MAN VA HAM LUONG VAT CHAT HUTJ CO DEN THANH PHAN GlAP XAC LON (MALACOSTRACA) 6 HE SINH THAI RUNG NGAP MAN CU LAO DUNG, TINH SOC TRANG Huynh TrUcfng Giang1, Au Van Hoa1, Tran Trung Gi[.]
ANH Hl/ONG CUA DO MAN VA HAM LUONG VAT CHAT HUTJ CO DEN THANH PHAN GlAP XAC LON (MALACOSTRACA) HE SINH THAI RUNG NGAP MAN CU LAO DUNG, TINH SOC TRANG Huynh TrUcfng Giang1, Au Van Hoa1, Tran Trung Giang1 Dilcfng Van Ni2, Nguyen Thi Kim Lien1 TOM TAT Nghien cPu anh hildng cua man va ham lppng vat chat hflu CO den phan Malacostraca d he sinh thai rPng ngap man Cu Lao Dung (CLD) dope thtfc hien tO 9/2019 - 3/2020 Tong cong co 24 diem thu mau dupe chia nhom thuy vpc Trong co nhom thuy vpc thuoc viing noi dong va nhom thuy vpc thuoc rtfng ngap man CLD Ket qua cho thay co tong cong 13 loai thuoc Malacostraca dilpc ghi nhan Sii thay doi man co anh hudng dang ke den su phan bo cua Malacostraca Mat Malacostraca bien dong kha cao giuta cac diem khao sat va vao mua kho co xu hudng cao hdn mua miia Cac loai Macrophthalmus depressus, Uca sp., Limnoria lignorum va Squilla mantis tiidng quan thuan co y nghia vdi man (p < 0,05) Ngoai ra, hau het cac loai Malacostraca thong quan thuan khong co y nghia thong ke vdi ham liipng TOM (p > 0,05), ngoai trrt loai S mantis Nhin chung, phan loai Malacostraca kha thap va can dhpc bao ton nham tri sh can bang sinh thai d rilng ngap man CLD Th khoa: Malacostraca, man, ham liipng TOM, rhng ngap man Cu Lao Dung I DAT VAN DE Malacostraca la mot nhflng 16p ldn nhat cua nganh phu giap xac (Crustacea) thuoc nganh chan khdp Arthropoda, co phan loai rat da dang, chung phan bo ca moi triicfng midc ngot, lp - man, ca niidc ngam O he sinh thai rilng ngap man, khu he dong vat khong xhPng song chu yeu la cac loai giap xac Ngoai vai tro quan trong chuoi dinh dildng, mot so loai giap xac lien tuc dao hang bun de tim noi tru an va dp trP thPc an Cac loai giap xac van chuyen chat hflu cO tP cac dia tang ben dildi len be mat bang each dao lefp tram tich (Macintosh, 1988) RPng ngap man la he sinh thai ven bien thuoc vung chuyen tiep giPa dat lien va bien, bi anh hodng manh me bdi thuy trieu, nen phan loai giap xac bien dong ldn Sp phong phu cua giap xac bi anh hiicing Khoa Thuy san, Truong Dai hoc Can Tho : Khoa Moi tnrbmg va Tai nguyen Thien nhien, Truong Dai hoc Can Tho 42 Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - So 06(127)/2021 bdi dieu kien moi trQdng song, sQ phong phu va nguon thiic an san co cung nhQ so lQpng dich hai Ngoai ra, vat chat hQu co d rQng ngap man la nguon thQc an quan cho cac quan the sinh vat khac □hau nhQ ca, tom va cua San liipng tom, ca d vimg bien phu thuoc nhieu vao san liipng vat chat hQu cO rQng ngap man tao (Anneboina and Kumar, 2017) Tuy nhien, Hariyadi va cong tac vien (2020) cho rang quan xa giap xac khu vQc riing ngap man rat da dang va on dinh Cac loai giap xac cung co cac yeu to moi trQdng gicfi han cho ddi song cua chung, chang han nhii nhiet do, man, pH, tinh chat nen day va ham liipng chat hQu cO nen day thuy vQc Nhiing thay doi ve chat liipng cua he sinh thai thuy sinh va tinh chat nen day cung se anh hiidng den sQ phong phu va da dang cua giap xac cung nhii cac sinh vat khac Do man cung la mot nhiing yeu to moi triidng quan anh hiicfng den sii phan bo cua cac loai giap xac (Delgado et at, 2011) Vi vay, nghien cdu diipc thpc hien nham tim hieu anh hQdng cua man va ham liipng vat chat hQu cO den phan cua Malacostracca d riing ngap man Cu Lao Dung, tinh Soc Trang nham co bien phap bao ton nguon lpi giap xac d khu viic nghien cQu n gau Petersen (dien tich mieng gau 0,03 m2) vdi tong cong 10 gau va cho lan lQpt qua sang day co kich thQdc mat hidi 0,5 mm Mau sau thu dQpc sang loc that sach va cho vao chai nhQa ldn, co dinh bang formol d nong tQ -10% Dinh danh phan loai Malacostraca bang phQdng phap hinh thai dQa theo cac tai lieu phan loai cua Thai Thanh DQdng (2003), Lee va cong tac vien (2015) va Ng va Davie (2002) Mat Malacostraca dQpc xac dinh theo cong thQc: D = X/S (Trong do: X la so ca the dem diidc, S Id dien tich thu mau (S = n x d , vdi n la so gau thu mau vd d la dien tich mieng gau) Ngoai ra, man dQpc trQc tiep tai cac diem thu mau bang may da chi tieu (Hana HI9828) Mau bun day dQpc thu tren mat nen day d sau khoang -2 cm vdi lQpng khoang 500 g/mau, tron deu mau, trQ lanh d 4°C va sau xac dinh ham lQpng vat chat hQu cd (TOM) bang phQdng phap dinh lQpng d nhiet 80°C 24 gid, tiep tuc nung d 450°C gid, sau can de xac dinh phan tram TOM TQdng quan (Pearson) giQa man va TOM dQpc xQ ly bang phan mem SPSS 22.0 DOI THONG VA PHl/ONG PHAP NGHIEN CtfU 2.1 Doi tiipng nghien ciiu Thanh phan loai va mat Malacostraca d he sinh thai riing ngap man cua Cu Lao Dung thuoc tinh Soc Trang la doi tiipng chinh nghien cQu 2.2 PhiiPng phap nghien ciiu Tong cong co dpt thu mau vao miia mQa (thang 9/2019) va miia kho (thang 3/2020) moi dpt nghien cQu co 24 diem thu dQpc d cac song, rach thuoc khu viic riing ngap man Cu Lao Dung va chia lam nhom thuy vpc (ky hieu tQ N1 den N8), moi nhom thuy viic diipc thu lap lai lan Cac nhom thuy viic diipc thu theo mat cat ngang cua rQng ngap man (RNM) va theo hiidng tQ vimg noi dong (VND) gom cac diem N l, N2, N3, N4 va N5 den RNM vimg ven bien co cac diem N6, N7 va N8 Cac diem thu mau d VND co khoang each tQ 6,5 - 9,5 km va d khu vQc RNM co khoang each tQ 3,5 - 5,0 km, mQc nQdc tai cac diem thu mau bien dong tQ - 2,5 m Vi tri cua cac diem thu mSu dQpc trinh bay d Hinh Thanh phan loai va mat Malacostraca tai moi vi tri dQpc thu d cac bang III KET QUA VA THAO LUAN 3.1 Do man va ham lQdng vat chat hflu cd d rQng ngap man Cu Lao Dung, tinh Soc Trang Do man tai cac diem thu mau theo mua d Cu Lao Dung, Soc Trang ghi nhan dao dong tQ 0,1 - 18,6%o, trung binh 5,7 ± 4,4%o, cao nhat d diem N6 vao mua kho va thap nhat d diem N l vao mua mQa (Hinh 2) Bien dong man co sQ chenh lec rat ldn giQa mua mQa va mua kho Vao mua mQa, man giQa cac diem thu mau dao dong tQ 43 Tap chiKhoa hoc va Cong nghe Nong nghiep Viet Nam - So 06(127)/2021 0,1 - 4,9%o, trung binh 1,3 ± l,6%o, va co xu hiicfng tang dan tP diem N1 den N7 nhiing giam hcfn 2,3 lan tai diem N8 Do man vao mua miia rat thap la vao thdi diem la mua lu, bi anh hiidng trite tiep bdi nguon niicfc tii thtfe/ng nguon song Hau ve va nhan diipc liipng niicfc miia rat ldfn nen co sit giao thoa giPa niicfc ngot va niidc bien tai day Ngiipc lai, vao mua kho man cao hcfn rat nhieu so vefi mua miia va dao dong tii 1,1 - 18,6%o, trung binh 10,1 ± 7,l%o, co xu hiicfng tang dan tii diem N1 den N6 sau giam nhe diem N7 va N8 Vao thdi diem liicfng mila giam, qua trinh xam nhap man tii bien vao nen man tang cao hefn Ket qua nghien cPu cho thay man tai cac diem thu mau co xu hiicfng tang dan tii khu vpc noi dong (N1 - N5) den khu vPc riing ngap man (N6 - N8) cua huyen Cu Lao Dung, tinh Soc Trang 4.500 4.00 ^ 3.500 ^ 3.00 ^ 2.500 S 2.00 g l.5 0 H 1.00 500 00 ! I I I I ! N1 N2 N3 N4 N5 N6 N7 N8 (b) Hinh (a) Do man va (b) TOM cua cac diem thu mau d he sinh thai riing ngap man Cii Lao Dung Ham liipng TOM the hien ham liipng vat chat hiiu ccf tren nen day cua cac diem thu mau cf viing nghien cPu Ham liipng TOM trung binh tii 2,5 ± 0,3% va 2,7 ± 0,4% tiicfng Png cho mua miia va mua kho Ham liipng TOM nghien cPu tiicfng doi thap hcfn so vPi nghien ciiu cua Nguyen Thi Kim Lien (2017), TOM tren song Hau bien dong tii 2,4 - 10,0%, trung binh 5,7 ± 1,4% Cf nghien cPu hien tai, TOM co xu hiiong cao hdn vao mua kho cf cac diem N6, N7 va N8 vimg RNM, vao mua kho la cay riing rPi rung nhieu hon, qua trinh phan huy xac la cay riing lam gia tang ham liipng vat chat htfu c p , tii ham liipng TOM cung tang len tinh Soc Trang Viec xac dinh phan loai cua giap xac phu thuoc vao phiiPng phap thu mau va mua vu thu mau Vao mua miia tai cac vi tri N l, N2 va N3 moi triicfng niicfc co man rat thap (< l%o) nen khong tim thay sif hien dien cua cac loai Malacostraca Diem N6 co phan loai cao nhat (6 loai) so cac diem thu mau vao mua kho, day cung la diem thu co man trung binh cao hpn cac diem thu khac cf khu vpc khao sat (Hinh 3) Thanh phan loai cua Malacostraca co xu hiicfng cao d cac vi tri RNM ca miia miia va mua kho Ket qua tii hinh cho thay co loai diipc ghi nhan ca mua miia va miia kho nhii Alpheus digitalis, Uca sp., Macrophthalmus 3.2 Thanh phan loai Malacostraca cf riing ngap japonicas, Squilla mantis, Cirolana sp va Acetes man Cu Lao Dung, tinh Soc Trang indicus cho thay day la cac loai rong muoi co the Qua cac dpt khao, ket qua da ghi nhan tong cong phan bo d cac man khac Co loai chi tim 59 loai dong vat day, co 13 loai, 12 giong, thay vao mua miia gom Sesarma mederi, Ocypode ho thuoc lefp Malacostraca, chiem ti le 22% tong ceratophthalmus, Gammarus locusta va Aratus so loai cua dong vat day cf riing ngap man Cu Lao pisonii va loai ghi nhan diipc miia kho la Dung, Soc Trang Thanh phan loai Malacostraca Pseudosesarma moeschi, Macrophthalmus depressus xac dinh diipc nghien cdu tiiOng doi thap va Limnoria lignorum Ngoai ra, ket qua hinh hon so v6i nghien cdu cua Negromonte va cong tac cho thay co loai hien dien mua miia cf khu vien (2012), da xac dinh diipc 17 loai giap xac thuoc vpc RNM, la O ceratophthalmus, G locusta va 14 giong va 13 ho cf riing ngap man Gaibu, bang A pisonii, loai chi phan bo vao mua kho cf khu vpc Pernambuco, Brazil Trong Le Van Tho va cong RNM nhii P moeschi va M depressus Rieng khu tac vien (2020) da ghi nhan diipc 34 loai cua thuoc vpc VND khong tim thay loai phan bo dac triing ca 17 giong va ho riing ngap man Cu Lao Dung, mua kho va mua miia 44 Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - So 06f 127)/2021 * |o *< ■ Gammaridae ■ Ocypodidae = Limnoriidae ■ Alpheidae s Macrophthalmidae « Sesarmidae ■ Cirolanidae ss Squiliidae W2 Nl N2 N3 N4 N5 N6 N7 N8 Nl N2 N3 N4 N5 N6 N7 N8 VND RNM Mua mua VND RNM Muakho Hinh Thanh phan loai Malacostraca cua cac nhom thuy vile d riing ngap man CLD Mtia mua-RNM Mua kho Hinh Chia se phan loai Malacostraca vao mua mUa va mua kho d rvfng ngap man Cu Lao Dung Mtia kho-VND Hinh Chia se phan loai Malacostraca d khu vUc VND va RNM vao mua mila va mua kho d riing ngap man Cu Lao Dung 3.3 Mat Malacostraca or riing ngap man Cu cua viing bai trieu loai A nuttingi chiem Lao Dung ilu the d nen day soi Cac diem thu d RNM co mat Malacostraca bien dong til -11 ct/m2, Mat cua Malacostraca trung binh c6 stl dao mat cua loai cua cay A pisonii (Sesarmidae) co dong kha cao gifla cac diem thu mau, bien dong so ltlpng trung binh cao nhat Cua cay riing ngap til - 57 ct/m2 Vao mua miia, mat Malaostraca man dtlpc tim thay d vimg nhiet ddi va ban nhiet kha thap, bien dong til -1 ct/m2, thap hcfn so vdi ddi Day la loai cua rat nhanh nhen, giai doan cua mua kho, dao dong til - 57 ct/m2 (Bang 1) Mat chung thildng bo len nhQng r§ cay nho khoi mat Malacostraca trung binh vao mua kho cao hon mua dat nham tranh dich hai, giai doan trtldng mila d ca khu vtlc VND va RNM va diloc the hien chung co the bo len tdi ngon cay (Branco, 1991; d hinh Conde et ah, 2000) Mot so nghien ctiu cho thay Vao mua mtia, cac diem thu N l, N2 va N3 loai cua (con cai mang trifng) xuat hien quanh khong tim thay sii hien dien cua Malacostraca nam va sinh san lien tuc (Santana et ah, 2018), thdi diem moi trildng ntldc co man thap, nhien nghien cdu cua Nicolau and Oshiro (2002) nen day co ti le set, bim va cat lan lilcft la ± 4%, cho rang chung khong dtlpc tim thay d cac thang 87 ± 14% va ± 7%, chenh lech kha cao so vdi mua den thang Cac loai lai thude ho Gammaridae, kho vdi ti le set, bun va cat lan lildt la 15 ± 5%, Macrophthalmidae, Aegidae, Ocypodidae va 70 ± 14% va 16 ± 10%, nen co the lam han che sil Squiliidae co mat rat thap ( - ct/m2) phat trien cua chung Diem N4 co sil ilu the cua loai Vao mixa kho, mat cua Malacostraca trung tom go mo A digitalis (Alpheidae) phan bo d moi binh co xu htldng cao hdn mua mila Cac diem N l, trildng ntldc lo - man va dieu kien nen day N2 va N3 co mat rat thap, chi khoang ct/m2 bim, chiem ti le 88% bim cau true nen day Doi vdi ho Alpheidae, ben canh sil hien dien cua Theo Mossolin va cong tac vien (2006), cac loai tom loai A digitalis co stl xuat hien cua A indicus go mo (ho Alpheidae) phan bo tren khap the gidi d diem N l va N3 Theo Bhattacharya (1988) (dtlpc va xuat hien til vimg bai trieu den viing nxldc sau trich bdi Xiao and Greenwood, 1993), loai Acetes Loai A armillatus phan bo chu yeu d nen day bun indicus thich nghi moi trildng co nhiet 45 Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - So 06(127)/2021 til 22 den 25°C, khoang nhiet co the ton tai til 14 - 34°C O Malaysia, hai loai A indicus va A japonicas ddpc khai thac thildng mai til thang den thang 12 Cac loai tom chu yeu ddpc sil dung la lam thifc an len men va lam san pham kho Tam quan chinh cua Acetes linh vdc thilcfng mai la lam thdc an cho ngddi va chung co tiem nang nhil mot loai thdc an cho nuoi thuy san (Ung and Itoh, 1989) Loai Uca sp (Ocypodidae) (cua keo dan) co mat trung binh tiidng doi cao hon cac loai khac ( - ct/m2) cac diem til N4 den N8 Cac thong so moi trddng chu yeu anh hddng den sd phan bo cua cac loai cua la tham thdc vat, tinh chat nen day, thdc an, man, che thuy trieu va sd hien dien cua cac loai dong vat khac (Cesar et a l, 2005) Ngoai ra, vao mua kho co sd ilu the cua loai Cirolana sp (Cirolanidae) diem N4, ncfi co man 7%o va ham lilpng TOM 2,6%, cac nghien cdu ve Isopoda hien chila ddpc de cap nhieu Cac ho lai co mat thap hon ( - ct/m2) gom Macrophthalmidae, Sesarmidae, Limnoriidae va Squiliidae Bang Mat trung binh (ct/m2) cua cac ho thuoc lcfp Malacostraca rilng ngap man Cu Lao Dung Muamtla TT Ho RNM VND N1 VND N2 N3 N4 N5 N6 N7 N8 N1 Gammaridae Alpheidae Macrophthalmidae Ocypodidae Sesarmidae Cirolanidae Limnoriidae Squiliidae Tong cong Mua kho RNM N2 N3 N4 N5 N6 N7 N8 1 1 2 6 10 1 1 21 49 14 11 1 57 3.4 Tiitfng quan giiia man va ham lddng TOM U maracoani ddpc tim thay song cat rat vdi mat cua Malacostraca of rilng ngap man Cu Loai U leptodactyla thi tdOng quan nghich vdi ham Lao Dung, Soc Trang ldpng chat hdu co va am, U thayeri cho Nhin chung, man co anh hddng den sil phan thay moi tdcfng quan thuan vdi ca hai yeu to man bo cua cac loai thuoc Malacostraca Ket qua cho va tinh chat nen day Loai U maracoani va U rapax thay tong so 13 loai diipc xac dinh thi co thi khong tdOng quan vdi vat chat hdu cO hoac loai L lignorum va S mantis tilOng quan thuan am (Bezerra et al., 2006) Loai cua cay A pisonii co co y nghia vdi man mile p < 0,05 va loai xu hddng tdOng quan nghich vdi man nhdng M depressus, Uca sp thong quan chat che vcfi khong co y nghia thong ke (p > 0,05) TdOng td man d miic p < 0,01 (Bang 2) Trong nghien cdu nay, vdi nghien cdu cua Conde va cong tac vien (2000), loai M depressus chi ddpc tim thay d man 19%o tac gia cho rang cac yeu to pH, man va nhiet vao mua kho, loai S mantis va L lignorum nddc khong anh hddng den chu ky sinh san hoac ty ddpc phat hien of khoang man bien dong lan liipt le gidi tinh, cac ca the trddng ddpc tim thay til 10 - 17,5%o va - 19%o Do man va tinh chat nen tren re cay, cac cua A pisonii chda day la nhdng yeu to moi trdcing quan nhat trddng ddpc tim thay re ngam co the anh hvlcfng den sd phan bo khong gian cua nhieu loai giap xac (Frusher et al., 1994), dac biet la cac loai cua dan (Macintosh, 1988) Hai loai cua Uca leptodactyla va U rapax ddpc tim thay song d nen day co ti le cat trung binh, U thayeri ddpc ghi nhan nen day cat va rat min, 46 Hau het cac loai Malacostraca co xu hddng tdOng quan thuan nhdng khong co y nghia thong ke (p > 0,05) vdi ham ldpng TOM, ngoai trd loai tom tit S mantis tdOng quan thuan co y nghia vdi ham ldpng TOM va man (p < 0,05) Loai S mantis phan bo d man td 18 - 19%o, nen day bun nOi Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam-S606(127)/202 / ham lddng TOM bien dong td 3,3 - 3,6%, cao hon so vdi cac diem thu khac Day la loai co gia tri kinh •e cao, lam thdc an cho ngddi, phan bo nen day cat - bun va bun - cat Quan the cua chung dat dinh cao vao mua dong va thap nhat vao mua he, sd phan bo cua chung thi tdong quan khong co y nghia vdi man (Vila et a l, 2013) Loai tom co tap tinh dao hang nen thiidng thich nghi vdi nen day mem ven bien, noi co nen day la cat va bun cat (Atkinson et al., 1997) Bang TUdng quan gifla cac loai Malacostraca vdi man va TOM (n = 48) d rdng ngap man Cu Lao Dung, tinh Soc Trang STT Ten loai Do man TOM Gammarus locusta - 0,095 0,030 Alpheus digitalis - 0,177 0,016 Acetes indicus 0,109 0,012 Macrophthalmus japonicus 0,096 0,173 Macrophthalmus depressus 0,408” 0,178 Uca sp 0,458” 0,223 Ocypode ceratophthalmus -0,123 - 0,029 Pseudosesarma moeschi 0,283 0,149 Episesarma mederi - 0,077 0,108 10 Aratus pisonii - 0,076 0,021 11 Cirolana sp 0,030 0,047 12 Limnoria lignorum 0,335* 0,177 13 Squilla mantis 0,356* 0,307* Malacostraca 0,160 0,147 Ghi chu: *Tt(dng quan coy nghia d miicp < 0,05; ** Tiidng quan coy nghia dmticp < 0,01 IV KET LUAN TAI LIEU THAM KHAO Nghien cdu da tim thay tong cong 13 loai Malacostraca d he sinh thai rdng ngap man Cu Lao Dung, tinh Soc Trang Do man co anh hifdng dang ke den sd phan bo cua cac loai thuoc ldp Malacostraca Mat cua Malacostraca bien dong kha cao gida cac diem thu mau (0 - 57 ct/m2) va co xu hddng tang cao cung vdi sd gia tang cua man vao mua kho Mot so loai thich nghi vdi man cao la M depressus, Uca sp„ L lignorum va S mantis nghien cdu nay, hau het cac loai tddng quan khong chat che vdi ham lddng TOM, ngoai trd loai S mantis tddng quan thuan co y nghia vdi TOM Nhin chung, phan loai Malacostraca d khu vdc nghien cdu tddng doi thap nen can dddc bao ton nham tri sd can bang he sinh thai thuy vdc Thai Thanh Diidng, 2003 Mot so loai gidp xac thUdng gap d Viet Nam Trung Tam tin hoc-Bo Thuy san 108 trang LClI CAM ON De tai dddc tai trd bdi Dd an Nang cap Trtfdng Dai Hoc Can Ih d VN14-P6 bang nguon von vay ODA td chinh phu Nhat Ban Nguyen Thi Kim Lien, 2017 Nghien cdu phUdng phap quan trac sinh hoc danh gia chat lUdng nUdc tren tuyen song Hau sii dung ddng vat khdng xUdng s6ng cd Idn Luan an Tien si nganh Nuoi Thuy san Khoa Thuy san, Tritdng Dai hoc CanThd, 180 trang Le Van Tho, Dang Van Scfn, NguySn Thi Mai Hiidng, Phan Doan Dang va Tran Ngoc Diem My, 2020 Thanh pMn loai va phan bo cua cac loai cua (Crustacea: Decapoda: Brachyura) d rdng ngap man huyen Cu Lao Dung, Soc Trang Tap chi Khoa hoc va Cong nghe Viet Nam, 62 (6): 13-18 Anneboina, L.R and Kumar, K.S.K., 2017 Economic analysis of mangrove and marine fishery linkages in India Ecosystem Services, 24 (4): 114-123 Atkinson, R.J.A., Froglia, C., Ameri, E and Antolini, B., 1997 Observation on the burrows and burrowing behaviour of Squilla mantis (L.) (Crustacea: Stomatopoda) Marine Ecology, 18 (4): 337-359 47 Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - So 06(127)/2021 Bezerra, L.E.A., Carolina, B.D., Givanildo, X.S and Helena, M-C., 2006 Spatial distribution of fiddler crabs (genus Uca) in a tropical mangrove of northeast Brazil Scientia Marina, 70 (4): 759-766 Branco, J.O 1991 Aspectos ecologicos dos brachyura (Crustacea: Decapoda) no manguezal Itacorubi, SC - Brasil Revista Brasileira deZoologia, (1-2): 165-179 Cesar, I.I., Armendariz, L.C and Becerra, R.C., 2005 Bioecology of the fiddler crab Uca uruguayensis and the burrowing crab Chasmagnathus granulatus (Decapoda, Brachyura) in the Refugio de Vida Silvestre Bahia Samborombon, Argentina Hydrobiologia, 545:273-248 Conde, J.E., Tognella, Paes, E.T., Soares, M.L.G., Louro, I.A and Novelli, Y.S., 2000 Population and life history features of the crab Aratus pisonii (Decapoda: Grapsidae) in a subtropical estuary Interciencia, 25 (3): 151-158 Delgado, L., Guillermo, G and Carles, R., 2011 Effects of Different Salinities on Juvenile Growth of Gammarus aequicauda (Malacostraca: Amphipoda) International Journal o f Zoology, (ID 248790): 1-6 Frusher, S.D., Giddings, R.L and Smith III, T.J., 1994 Distribution and abundance of Grapsid crabs (Grapsidae) in a mangrove estuary: effects of sediments characteristics, salinity, tolerance and osmoregulatory ability Estuaries, 17: 647-654 Mossolin, E.C., Shimizu, R.M and Bueno, S.L.S., 2006 Population structure of Alpheus armillatus (Decapoda, Alpheidae) in Sao Sebastiao and Ilhabella, Southern Brazil Journal of Crustacean Biology, 26 (1): 48-54 Negromonte, A.O., Araujo, M.S.L.C and Coelho, P.A., 2012 Decapod crustaceans from a marine tropical mangrove ecosystem on the Southern Western Atlantic, Brazil Nauplius, 20 (2): 247-256 Ng, Peter K.L and Davie, P.J.F., 2002 A checklist of the brachyuran crabs of Phuket and Western Thailand Phuket Marine Biological Center Special Publication, 23 (2): 369-384 Nicolau, C.F and Oshiro, L.M.Y., 2002 Aspectos reprodutivos caranguejo Aratus pisonii (H Milne Edwards) (Crustacea, Decapoda, Grapsidae) manguezal de Itacuru^a, Rio de Janeiro, Brasil Revista Brasileira deZoologia, 19 (2): 167-173 Santana, J D L., Tereza, C.D.S.C., Flavio, D.A.A.A.J., Mylena, A.D.O and Marina, D S.L.C.D.A., 2018 Populational structure and sexual maturity of Aratus pisonii (H Milne Edwards, 1837) (Crustacea, Decapoda, Sesarmidae) in the estuarine channels of Mundau Lagoon, Northeastern Brazil Pan - American Journal of Aquatic Sciences, 13 (1): 1-12 Hariyadi, H., Prasetyo, D., Kurniawati, Y.D., 2020 The relationship of redox potential to Crustacea abundance at Bama beach of Baluran National Park, Situbondo, Indonesia IJOTA, (2): 95-108 Ling, E H and Itoh, S., 1989 A comparison of nutritional characteristics between Antarctic euphausiid meal (Euphausia superba) and tropical sergestid meal (Acetes sp.) In Program of the First International Marine Biotechnology Conference Tokyo, Japan Lee, B.Y., Ng, N.K and Peter, K.L.Ng., 2015 The taxonomy of five species of Episesarma De Man, 1895, in Singapore (Crustacea: Decapoda: Brachyura: Sesarmidae) Raffles Bulletin of Zoology Supplement, 31: 199-215 Vila, Y., I Sobrino and Paz Jimenez, M., 2013 Fishery and life history of spot - tail mantis shrimp, Squilla mantis (Crustacea: Stomatopoda), in the Gulf of Cadiz (eastern central Atlantic) Scientia Marina, IT (1): 137-148 Macintosh, D.J., 1988 The ecology and physiology of decapods of mangrove swamps P Zool Soc Lond., 59: 325-341 Xiao, Y and Greenwood, J.G., 1993 The biology of Acetes (Crustacea, Sergestidae) Oceanography and Marine Biology: an Annual Review, 31:259-444 Effects of salinity and organic m atter on M alacostraca composition in mangrove ecosystem of Cu Lao Dung, Soc Trang province Huynh Truong Giang, Au Van Hoa, Tran Trung Giang, Duong Van Ni, Nguyen Thi Kim Lien Abstract The effects of salinity and total organic matter on the Malacostraca composition in the mangrove ecosystem of Cu Lao Dung (CLD) was carried out from September 2019 to March 2020 A total of 24 sampling sites are divided into groups of water bodies In which, groups (sites) belong to the inner area, and others are coastal mangroves of CLD The results showed that a total of 13 species of Malacostraca were recorded The distribution of Malacostraca was strongly affected by salinity changes in the studied areas Malacostraca density has fluctuated relatively high among sampling sites Their densities in the dry season tend to be higher than those in the rainy season Species including m Tap chi Khoa hoc va Cong nghe Nong nghiip Viet Nam - So 06(127)/2021 Mmrmphthalmus depressus, Uca sp„ Limnoria lignorum and Squilla mantis have a significantly positive correlation ■ ih salinity (p < 0.05) In addition, most Malacostraca species have positive relation but are non-statistically significant with TOM concentration (p > 0.05), except S mantis species In general, the species composition of Malacostraca is pretty low and needs to be conserved to maintain ecological balance in CLD mangroves Keywords: Malacostraca, salinity, TOM concentration, Cu Lao Dung mangrove Jigay nhan bai: 16/5/2021 Ngay phan bien: 05/6/2021 Ngifdi phan bien: TS Le Van Khoi Ngay duyet dang: 29/6/2021 ... 3.1 Do man va ham lQdng vat chat hflu cd d rQng ngap man Cu Lao Dung, tinh Soc Trang Do man tai cac diem thu mau theo mua d Cu Lao Dung, Soc Trang ghi nhan dao dong tQ 0,1 - 18,6%o, trung binh... Nhiing thay doi ve chat liipng cua he sinh thai thuy sinh va tinh chat nen day cung se anh hiidng den sQ phong phu va da dang cua giap xac cung nhii cac sinh vat khac Do man cung la mot nhiing... huyen Cu Lao Dung, tinh Soc Trang 4.500 4.00 ^ 3.500 ^ 3.00 ^ 2.500 S 2.00 g l.5 0 H 1.00 500 00 ! I I I I ! N1 N2 N3 N4 N5 N6 N7 N8 (b) Hinh (a) Do man va (b) TOM cua cac diem thu mau d he sinh