Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam So 06(127)/2021 A N H H l/C JN G C U A N H IE T D O VA D O M A N L E N TA N G T R U O N G VA H IE U Q U A S I / D U N G T H U C A N CLJA T O M C A N[.]
Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - So 06(127)/2021 A N H H l/C JN G C U A N H I E T D O VA D O M A N L E N T A N G T R U O N G VA H I E U Q U A S I / D U N G T H U C A N CLJA T O M C A N G X A N H Tran Le Cam Tu1, Nguyen Viet Hien1, Tran Minh Phu1, Tran Thi Thanh Hien1 TOM TAT Nghien ciiu diipc thiic hien nham danh gia anh hiidng cua nhiet va man len hieu qua sii dung thiic an cua tom cang xanh (Macrobrachium rosenbergii) Thi nghiem dupe bo tri gom nghiem thiic vdi miic man la 0; 5; 10%o ket hop vdi miic nhiet nUdc 27 - 28°C (nhiet moi triidng - NDMT), 31°C va 34°C; moi nghiem thiic dvtpc lap lai lan; thcri gian thi nghiem la tuan Ket qua thi nghiem cho thay nhiet da anh hiidng den tang tnidng co y nghia thong ke (p < 0,05) Tom tang triidng cao nhat d NDMT vdi cac man 0; va 10%o va khac biet co y nghia thong ke so vdi cac nghiem thiic lai (p < 0,05) Tom nuoi d cac nghiem thiic 34°C d 0; va 10%o co toe tang tnidng thap nhat va khac biet co y nghia thong ke so vdi tom nuoi d cac nghiem thiic 31°C (p < 0,05) He so thiic an (FCR) va hieu qua sii dung protein (PER) cung bi anh hiidng bdi nhiet Tom nuoi d nghiem thiic NDMT va man 0; 5; 10%o co he so chuyen hoa thiic an FCR thap nhat, ty le chuyen hoa protein PER cao nhat va khac biet so vdi cac nghiem thiic lai (p < 0,05) Diia vao ket qua tang triidng, FCR va PER, cho thay tom cang xanh co the phat trien tot d man khong qua 5%o va nhiet diidi 31°C Tii khoa: Tom cang xanh (Macrobrachium rosenbergii), man, nhiet do, tang tiidng I DAT VAN DE Bien doi hau la van de da va dang diipc the gidi quan tarn, sii gia tang nhiet va xam nhap man la nhflng hau qua nghiem gay tii bien doi hau Sii am len toan cau lam nhiet tang trung binh 0,5°C 50 nam qua, mo hinh bien doi hau toan cau dii bao nhiet co the tang tvi 0,8 den 2,7°C vao nam 2060 va tvi 1,4 - 4,2°C vao nam 2090 (Anh et a l, 2016) Bien doi hau gay tac dong tieu ciic den sinh trvidng va phat trien cua dong vat thuy san d qui mo khu viic va toan cau, mac du phan ling givia cac loai doi vdi nhiet va man la khac Tang trvidng cua ca co the bi anh hiidng bdi mot so yeu to moi trvidng, nhiet moi trvidng nvidc va nhiet be mat bien diidc nghien cdu nhieu nhat Cac yeu to moi trvidng khac nhvi man, lvicfng mvia cung gop phan anh hiidng len phat trien cua dong vat thuy san (Ding et al., 2016) Tom cang xanh la loai co gia tri kinh te cao diidc nuoi bien d Chau A Cac nghien cdu ve anh hvidng cua nhiet va man tren tom cang xanh len cac chi tieu sinh ly, tang trvidng, sinh san da dvipc thvic hien (Manush et al., 2006; Huong et al., 2010; Habashy and Hassan., 2011; Shailender et al, 2012; Chand et al., 2015) Tang trvidng cua tom cang xanh d man va 10%o thi tot hdn d man va 15%o (Huong et al., 2010) Ty le song cua tom nuoi d va 15%o thi tot hon dieu kien nuoi niidc ngot (Huynh Kim Hvidng, 2015) Chand va cong tac vien (2015) da nuoi tom cang xanh d cac man khac va ket qua cho thay tom co tang trvidng cao nhat d man 10%o tiep theo la 5, 15, va 0%o, nhien svi khac biet khong co y nghia thong ke Mot nghien ciiu cua Habashy and Hassan (2011) cho thay tom tang trvidng tot d nhiet 24 - 29°C va giam tang trvidng d 34°C, man toi liu cho tang trvidng va sinh san cua tom cang xanh la 0%o - 8%o Shailender va cong tac vien (2012) cho biet tom cang xanh co toe tang triidng tang nhiet tang tvi 26 den 30°Cva giam d nhiet 34°C Nhiet va man toi liu cho sinh san tom cang xanh la 30°C va 6%o Cac nghien cdu da cho thay d cac nhiet va man khac nhau, tom dap ling ve tang trvidng va ty le song khac Cac nghien ciiu triidc day chu yeu tap trung vao nghien ciiu anh hiidng cua nhiet va man len tang tnidng va sinh san cua tom cang xanh hieu qua sd dung thiic an nhii: he so chuyen hoa thiic an (FCR), hieu qua sii dung protein (PER) va he so rich luy protein (NPU) thi chiia diipc nghien ciiu Vi vay nghien ciiu diipc thvic hien nham danh gia anh hiidng cua ket hpp nhiet va man len tang tnidng, ty le song va hieu qua svi dung thiic 1Khoa Thuy san, Truong Dai hoc Can Tho 129 Tap chiKhoa hoc va Cdng nghe Nong nghiep Viet Nam - So 06(127)/2021 an cua tom cang xanh, ket qua thi nghiem co the cung cap dh lieu cho mo hinh nuoi thuy san dap ling vdi bien doi hau II DOI t u O n g v A p h u Q n g p h Ap NGHIEN CUtJ 2.1 Doi tdqng nghien ciiu Tom cang xanh (3 g/con) diiqc mua tii vung nuoi tom thiiong pham va chuyen ve Khoa Thuy san, Triicing Dai hoc Can Tho de thuan diidng cho thi nghiem 2.2 PhiiOng phap nghien ciiu 2.2.1 B o tri thi nghiem Tom diiqc thuan diidng tuan cac be 500 lit co chiia cac gia the nilon de tranh hien tiidng an Do man cua tom diiqc dieu chinh tang dan vdi miic - %o/ngay bang each bo sung niidc ot (do man 80%o) Thi nghiem diiqc bo tri gom nghiem thiic vdi miic man la ,5 va 10%o ket hop vdi miic nhiet niidc nhiet moi triidng NDMT (27 - 18°C), 31°C va 34°C Moi nghiem thiic diiqc lap lai lan Tong so be thi nghiem (500 lit) la 27 be Moi be thi nghiem tha 28 vdi ty le diic : cai la 1: Thi nghiem diiqc thiic hien tuan 2.2.2 Qudn ly th i nghiem Thiic an thi nghiem la thiic an vien co ham liiong protein 40% lipid 6%, va 11% am Tom diiqc cho an lan/ngay (8 gid va 16 gid) theo nhu cau Liiqng thiic an dii diiqc lay va tinh theo khoi liiqng kho Trong qua trinh thi nghiem, tom chet diidc can tiing va ghi nhan hang Cac thong so moi triidng niidc nhii nhiet do, man, pH, oxy diiqc moi lan (7 gid va 15 gid) Nhiet niidc va man cua cac nghiem thiic diiqc kiem tra va dieu chinh moi theo dung tiing nghiem thiic Mau niidc diiqc thu va moi tuan lan cac chi tieu NH3-N, N -N bang bo nhanh hieu Sera (Diic) Gia tri pH dao dong tii 7,2 - 8,3, oxy hoa tan 5,9 - 6,8 mg/L, NH3 N la 0,05 ± mg/L va N N la 0,08 ± 0,07 mg/L Cac chi so tang triidng, ty le song va hieu qua si£ dung thiic an diiqc ghi nhan * Ty le song (%), SR: so tom ket thiic thi nghiem/so tom bo tri thi nghiem ban dau x 100 * Cac chi so tang triidng: Tang (g): WG = Wf - W 130 Tang triidng tren (g/ngay): DWG = - — Trong do: W: khoi liidng tom ban dau bo tri thi nghiem; Wf khoi lUdng tom ket thuc thi nghiem; t: thdi gian thi nghiem Hieu qua sd dung thiic an: H« s6 th ic an FCR = l^ n g th fc an sCl dung (g) tang (g) W -W Hieu qua sd dung Protein PER = -1— a -protein an vao Hieu qua tich luy protein: ^ T proteincuatomsauthi nghiem- proteintombandau NPU = - - — -xlOO proteintieuthu 2.2.3 P han tich m au Mau tom triidc va sau thi nghiem diiqc phan tich phan sinh hoa nhii am do, protein tho, lipid tho bang phiicing phap mo ta bdi AOAC (2000) 2.2.4 P han tich so lieu So lieu diiqc tinh trung binh va lech chuan Sd khac biet ve gia tri trung binh gida cac nghiem thde diiqc xd ly hai nhan to ANOVA va phep thd Duncan bang phan mem SPSS V.20 vdi mdc y nghia p < 0,05 2.3 Thdi gian va dia diem nghien cdu Nghien cdu diiqc thiic hien td thang 10/2018 den 9/2019 tai trai thiic nghiem Khoa Thuy san, Tnidng Dad hoc Can Tho IH KET QUA VA THAO LUAN 3.1 Ket qua 3.1.1 Tang triidng vd ty le song Ket qua cho thay khong co sd tdOng tac gida man va nhiet len tang trddng cua tom xanh (p > 0,05), chi co yeu to nhiet anh hddng len cac chi so tang trddng cua tom cang xanh (p < 0,05) (Bang 1) Tang tnidng cua tom co xu hddng giam dan gia tang nhiet d tat ca cac man Khoi ldqng tom thap nhat d mdc nhiet 34°C d ca mdc man 0; va 10%o va khac biet co y nghia thong ke so vdi cac nghiem thde khac (p < 0,05) Cac nghiem thde tom nuoi d nhiet moi tnidng (27 - 28°C) vdi cac man khac co tang tnidng cao nhat va khac biet co y nghia thong ke (p < 0,05) so vdi cac nghiem thde nhiet 31°C va 34°C Tap chi Khoa hoc va Cong nghe Nong nghiip Viet Nam - So 06(127)/2021 Bang Tang triidng cua tom cang xanh sau tuan thi nghiem Wi Wf WG (g) DWG (g/ngay) SR (%) 0%o - NDMT 3,92 ±0,10 6,59 ± 0,27c 2,80 ± 0,27b 0,05 ± 0,005b 41,7 ± 0,04a 0%o - 31°C 3,93 ± 0,22 6,10 ± 0,31b 2,33 ± 0,28a 0,04 ± 0,005a 46,4 ± 0,03a 0%o - 34°C 3,73 ± 0,04 5,38 ± 0,14a 2,23 ± 0,13a 0,04 ± 0,003a 45,2 ± 0,05a 5%o - NDMT 4,06 ± 0,14 6,60 ± 0,09c 2,45 ± 0,24b 0,04 ± 0,004b 50,0 ± 0,03ab 5%o - 31°C 3,89 ± 0,04 5,82 ± 0,3 lb 2,09±0,35a 0,04 ± 0,006a 53,6 ± 0,05ab 5%o - 34°C 3,86 ±0,09 5,53 ± 0,56a l,89±0,54a 0,03 ± 0,001a 53,6 ± 0,05ab 10%o - NDMT 3,95 ±0,07 6,48 ± 0,09c 2,57±0,09b 0,05 ± 0,002b 52,4 ± 0,02b 10%o - 31°C 4,09 ±0,15 635 ± 0,09b 2,09±0,12a 0,04 ± 0,002a 52,4 ± 0,07b 10%o - 34°C 3,86 ± 0,08 530 ± 0341 l,63±0,13a 0,03 ± 0,002a 48,8 ± 0,02b P (do man, DM) 0,192 0,719 0,073 0,111 0,049 P (nhiet do, ND) 0,135 0,05) Wi: k h o i lU d n g t o m b a n d d u k h i b o t r i t h i n g h i e m , Wf: khoi lUdng tom ket thuc thi nghiem, WG: tang DWG: t a n g t n i d n g t r i n n g a y , SR: ty l i s o n g 3.1.2 Hieu qua s i dung thtic an cua tom cdngxanh nhiet 34°C va man 0, va 10%o, gia tri FCR thi nghiem dat cao nhat va gia tri PER dat thap nhat va khac biet Ket qua thi nghiem cho thay he so chuyen hoa thdc an (FCR), hieu qua sd dung protein (PER) chiu tac dong cua nhiet (p < 0,05) (Bang 2) Hieu qua sd dung thdc an cua tom chiu anh htidng bdi sd gia tang nhiet va man nghiem thdc co mdc co y nghia thong ke so vdi cac nghiem thdc khac (p < 0,05) FCR dat thap nhat d cac nghiem thdc 28°C - 0,5 va 10%o va hieu qua sif dung protein PER la cao nhat nhien khong khac biet co y nghia thong ke (p > 0,05) so vdi cac nghiem thdc 31°C Bang Hieu qua sd dung thdc an cua tom cang xanh thi nghiem FCR PER (%) NPU (%) 0%0 - NDMT 3,53 ± 0,54a 0,74 ± 0,1 lb 32,8 ± 5,77b 0%o - 31°C 4,28 ± 0,58a 0,61 ± 0,09b 31,5 ± 2,18b 0%o - 34°C 4,72 ± 0,64b 0,55 ± 0,08a 29,9 ± 7,70b 5%o - NDMT 4,12 ± 0,40a 0,62 ± 0,06b 30,5 ± 14,9b 5%o - 31°C 4,36 ± 0,59a 0,59 ± 0,08b 30,9 ± l,84b 5%o - 34°C 6,26 ± 2,09b 0,45 ± 0,14a 29,3 ± 9,07b 10%o - NDMT 3,94 ± 0,17a 0,65 ± 0,03b 22,3 ± 3,84a 10%o - 31°C 4,54 ± 0,21a 0,56 ± 0,03b 16,4 ± 5,80* 10%o - 34°C 7,19 ± l,55b 0,37 ± 0,03a 11,5 ± 5,19a P (do man, DM) 0,184 0,105 0,004 P (nhiet do, ND) 0,003 0,001 0,506 P (DM*ND) 0,504 0,725 0,904 Nghiem thdc Ghi chu: Gia tri trung binh va lech chudn citng cot theo sau bdi cac chut cai giong thi khac biet khdng co y nghia thong ke (p > 0,05) FCR: he so chuyen hoa thutc an, PER: hieu qua sit dung protein, NPU: hieu qua tich luy protein 131 Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - So 06(127)/2021 3.1.3 Thanh phdn sinh h o a cua tdm th i nghiem Thanh phan sinh hoa cua tom cang xanh khong co sd tddng tac cua man va nhiet (p > 0,05), ngoai trd ham 1ifpng protein tom co xu hifdng giam man tang, qua trinh tich luy protein tom cang xanh giam (p < 0,05) Ham lifpng protein tom cang xanh dat thap nhat tai man 10%o - NDMT; 31 va 34°C va khac biet co y nghia thong ke so vdi cac nghiem thilc lai (p < 0,05) Am va lipid cua tom giifa cac nghiem thilc khac biet khong co y nghia thong ke (p < 0,05) Gia tri nang lifqng tho (GE) bi anh hifdng bdi nhiet (p < 0,05), nhiet tang gia tri nang lifpng tho cua tom giam Bang Thanh phan sinh hoa cua tom thi nghiem nuoi d cac nhiet va man khac Nghiem thiic Am (%) Protein (%) Lipid (%) Nang lifpng GE (KJ/g) 0%o - NDMT 70,1 ± l,79a 65,4 ± 3,07b 5,20 ± 0,94a 19,3 ± 0,46b 0%o - 31°C 70,9 ± l,26a 66,5 + l,02b 4,52 ± 3,31a 18,9 ± l,05ab 0%o - 34°C 71,3 ± 0,27a 66,0 + 3,96b 5,41 ± l,48a 19,1 ± l,21a 5%o - NDMT 69,1 ±2,62a 66,7 ± 6,00b 6,79 + 2,23a 20,2 ± l,25b 5%o - 31°C 72,2 ± 0,82a 66,9 ± l,58b 4,70 ± 0,61a 19,4 ± 0,05ab 5%o - 34°C 71,9 ± l,15a 66,0 ± 4,8 lb 5,34 ± 2,08a 19,4 + 0,29a 10%o - NDMT 70,5 ± 3,33a 63,9 ± 2,80a 6,83 ± 2,42a 20,0 ± 0,48b 10%o - 31°C 70,4 ± l,06a 59,4 + 2,46a 5,29 ± l,91a 18,9 + 0,73ab 10%o - 34°C 71,9 ± 0,99a 57,8 ± 2,90a 2,33 ± l,65a 17,2 ± 0,83a P (do man, DM) 0,966 0,012 0,078 0,139 P (nhiet do, ND) 0,202 0,601 0,253 0,046 P (DM*ND) 0,759 0,675 0,482 0,259 Ghi chu: Gia tri trung binh va lech chuan ciing cot theo sau bdi cac chit cai giong thi khac biet khdng coy nghia thong ke (p > 0,05) Ket qua tii sit tich luy protein NPU (Bang 2) va ham lifpng protein tom (Bang 3) cho thay, man da anh hifdng tnJc tiep den sd tich luy protein tom, din den ham lifdng protein tom giam dan man tang dan vdi cac mute nhiet Nang ldpng tho (GE) cua tom cang xanh giam nhiet tang len, GE dat cao nhat d cac nghiem thdc NDMT va khac biet co y nghia thong ke (p < 0,05) so vdi nghiem thdc 34°C va khac biet khong co y nghia thong ke (p > 0,05) so vdi nghiem thdc 31°C 3.2 Thao luan Ket qua thi nghiem cho thay khong co sd tiiOng tac cua nhiet va man len cac chi so tang trddng cua tom cang xanh O cac nghiem thdc NDMT (27 - 28°C) tom tang trifbng nhanh hon so vdi nghiem thdc co mile nhiet 31°C va 34°C d ca mile man 0, va 10%o Nhiet thich hop cho tom cang xanh la 24 - 30°C, khoang nhiet de tom tang trifdng tot nhat la khoang 26 - 28°C, gidi han nhiet thap la 14°C, gidi han nhiet cao la 35°C (Liiong Dinh Trung, 2000) Tom cang 132 xanh luon difpc biet la co rong nhiet tif 15 - 32°C vdi khoang nhiet toi ifu cho tang tnfdng la 29 - 31°C (Ling, 1969) Theo Habashy and Hassan (2011) toe tang tnfdng cua tom tang d mile nhiet 24°C va 29°C, giam dan d mile nhiet 34°C Huynh Kim Hifdng va cong tac vien (2015) da tim khoang nhiet va man toi ifu cho tang trifdng cua tom la 0%o - 29°C va 8%o - 29°C, man 5%o la thich hcfp cho sif phat trien cua tom cang xanh ve tang trifdng U man td - 10%o thi tom cang xanh tang trifdng binh thifdng, man len hdn 10%o thi toe tang trifdng cua tom cang xanh giam dan (Nguyen Thanh Phifcfng va ctv., 2003) Ket qua thi nghiem cho thay anh hifdng cua nhiet la nhan to quan cho sif phat trien cua tom cang xanh Khi nhiet tang se lam tang hoat dong trao doi chat, tang chuyen hoa vat chat va tieu hao nhieu nang lifpng co the tom cang xanh, tom se mat khoang thdi gian ban dau de thay doi va thich nghi vdi moi trifdng mdi Vi vay, Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam -So 06(127)/2021 thi nghiem nay, cac nghiem thdc co nhiet 34°C d cac mile man cho thay toe tang triidng tren (DWG) cua tom cang xanh thap hdn so vdi cac nghiem thde khac Sit tac dong cua nhiet va man anh htidng ldn den tang triidng cua tom cang xanh nhiet lam thuc day qua trinh trao doi chat va hap thu chat dinh diidng thde an de tom tri sil song va tang tnidng, neu nhiet tang qua mdc giefi han 30 - 31°C se gay dc che cho tom khien chung phai tieu hao nhieu nang liidng cho viec thich nghi vdi moi tnidng Nghien cdu cua Nguyen Thanh Phiidng va cong tac vien (2003) cho rang, d man 5%o, tom tang tnidng nhanh hcfn so vdi man 0%o va nhanh hem nhieu so vdi man 15%o, tom nuoi d man 10%o can nhieu nang ldqng cho dieu hoa ap suat tham than Trong nghien cdu man van khong phai la yeu to chinh anh hiidng den sd tang tnidng cua tom, co the thay d nghiem thde NDMT d cac man 0, va 10%o, tom van tang tnidng tot so vdi cac nghiem thde lai Tiidng td nhd tac dong len tang trddng, nhiet trdc tiep tac dong len hieu qua sd dung thde an cua tom cang xanh Khi nhiet tang da thuc day qua trinh trao doi chat ben ccf the cua tom, dieu lam tang eddng kha nang hoat hoa enzyme cua tom cang xanh lam cho tom an nhieu hdn, vi vay FCR tang cad d mdc nhiet 34°C va khac biet co y nghia thong ke (p < 0,05) vdi cac nghiem thde khac Kha nang an thde an cua tom cang xanh tang tuyen tinh theo nhiet td 10 - 30°C, nhdng tom giam an tang nhiet den 32°C va tom chet d nhiet 35°C sau - nuoi (Shi et al, 1991) O tom the chan trang (Penaeus vannamei) giai doan hau au trung, cho an vdi liidng thde an lien tuc theo nhu cau cho thay ti le hap thu thde an cua tom dat cao nhat d mdc nhiet 35°C (Ponce - Palafox et al., 1997) Tuy nhien, tom an mot liidng ldn thde an men tieu hoa tom lai co gidi han, dieu lam cho tom khong the tieu hoa hoan toan thde an, dac biet la hap thu va sd dung hieu qua protein dan den PER dat thap nhat tai nghiem thde 34°C - 10%o, tai nghiem thde nay, gia tri NPU tom la thap nhat Hieu qua sd dung thde an cua tom cang xanh bi anh hiidng bdi nhiet va man, nghiem thde 10%o - 34°C co PER va NPU la thap nhat cho thay kha nang sd dung protein cua tom cang xanh giam tac dong cua moi triidng, de thich nghi tom cang xanh can tieu hao nhieu nang liidng hon dieu se lam tom bi dc che dan den hieu qua sd dung protein kem ma dong vat se sd dung toi da nguon protein de xay ddng cO the (Tran Thi Thanh Hien va Nguyen Anh Tuan, 2009) O nghiem thde nhiet cao va man cao, tom cang xanh co hien tiiqng due co, tom bi coi va cham ldn so vdi cac nghiem thde khac SO tiidng quan gida gia tri NPU va ham liidng protein cd thit tom co the nhan man da anh hiidng tnic tiep den sd tich luy protein tom, dan den ham liidng protein tom giam dan man tang dan d tat ca mdc nhiet Nhiet niidc khong anh hiidng len kha nang tieu hoa lipid, cacbohydrate va vat chat vo cd (Newman et al., 1982) Ket qua thi nghiem cho thay man can trd kha nang tong hop protein de tom xay ddng cd the, dan den hien tiidng due cd nuoi tom cang xanh d man cao ti le tang len nuoi tom d nghiem thde 10%o - 34°C IV KETLUAN Do man cao va nhiet cao da anh hiidng len tang trddng, hieu qua sd dung thde an cua tom cang xanh Tang triidng va hieu qua sd dung thde an cua tom giam tang nhiet d tat ca cac man 0, va 10%o Nhii vay, d mdc nhiet va man khong qua 31°C va 5%o thi tom cang xanh van phat trien on dinh LCfl CAM ON De tai diidc tai trd bdi Dd an Nang cap Triidng Dai hoc Can Thd VN14-P6 bang nguon von vay ODA td chinh phu Nhat Ban TAI l i e u th am khao Tran Thi Thanh Hien va Nguyen Anh Tuan, 2009 Dinh diidng va thiic an thuy san Nha xuat ban Nong nghiep, 191 trang Huynh Kim Hiidng, Tran Ngoc Hai, Do Thi Thanh Hiidng, Le Quoc Viet, va Le Phiidc Sdn, 2015 Anh hiidng man len chu ky lot xac, sinh san va tang tnidng cua tom cang xanh (Macrobrachium rosenbergii) Tap chi Khoa hoc Tnidng Dai hoc Can Thd, 38: 35-43 Nguyen Thanh Phiidng, Tran Ngoc Hai, Tran Thi Thanh Hien va Marcy N Wilder, 2003 Nguyen ly va ky thuat sdn xuat giong tom cang xanh (Macrobrachium rosenbergii) Nha xuat ban Nong nghiep, 127 trang Liidng Dinh Trung, 2000 Ky thuat Udng va nudi tom cang xanh Nha xuat ban Nong Nghiep, 134 trang 133 Tap chiKhoa hoc va Cong nghe Nang nghiep Viet Nam - So 06(127)/2021 Anh, D.N., Dipierri, A.A and Leonardelli I., 2016 Assessing the evidence: migration, environment and climate change in Viet Nam IOM, 86 trang Ling, S.W., 1969 The general biology and development of Macrobrachium rosenbergii de Man EAO Fish Report, 57: 589-606 AOAC (Association of Official Agricultural Chemists), 2000 Official Methods of Analysis Association of Official Agricultural Chemists Arlington Manush, S.M., Pal, A.K., Das, T., and Mukherjee, S.C, 2006 The influence of temperatures ranging from 25 to 36°C on developmental rates, morphometries and survival of freshwater prawn (Macrobrachium rosenbergii) embryos Aquaculture, 256(1-4): 529-536 Chand, B.K., Trivedi, R.K., Dubey, S.K., Rout, S.K., Beg, M.M., and Das, U.K, 2015 Effect of salinity on survival and growth of giant freshwater prawn Macrobrachium rosenbergii (de Man) Aquaculture Reports, 2:26-33 Ding, C.Z., Jiang, X.M., Chen, L.Q., Juan, T and Chen, Z.M, 2016 Growth variation of Schizothorax dulongensis Huang, 1985 along altitudinal gradients: implications for the Tibetan Plateau fishes under climate change / Appl Ichthyol, 32: 729-733 Habashy, M.M., and Hassan, M.M.S, 2011 Effects of temperature and salinity on growth and reproduction of the freshwater prawn, Macrobrachium rosenbergii (Crustacea-Decapoda) in Egypt International journal of environmental science and engineering (IJESE), 1: 83-90 Huong, D.T.T., Wang, T., Bayley, M., and Phuong, N.T, 2010 Osmoregulation, growth and moulting cycles of the giant freshwater prawn (Macrobrachium rosenbergii) at different salinities Aquaculture Research, 41(9): el35-el43 Newman, M.W., Lutz, P.L and Snedaker, S.C, 1982 Temperature effects on feed ingestion and assimilation efficiency of nutrients by the Malaysian prawn, Macrobrachium rosenbergii De Man Journal of the World Mariculture Society, 13(1-4): 95-103 Ponce-Palafox, J., Martinez-Palacios, C.A., and Ross, L.G, 1997 The effects of salinity and temperature on the growth and survival rates of juvenile white shrimp, Penaeus vannamei, Boone, 1931 Aquaculture, 157(12): 107-115 Shailender, M., Ch, S.B., Sarmal, K.P., and Kishor, B, 2012 Effects of temperature and salinity on growth, hatching rate and survival of the giant freshwater prawn, Macrobrachium rosenbergii (de man) under captive conditions International Journal of Bioassays, 1(11): 150-155 Shi, Z., Mei, Z„ and Sun, J, 1991 Effects of water temperature on the feeding of Macrobrachium nipponenses Journal of Fisheries of China, 15:338-343 Effects o f tem perature and salinity on growth and feed utilization efficiency of freshwater prawn Tran Le Cam Tu, Nguyen Viet Hien, Tran Minh Phu, Tran Thi Thanh Hien Abstract This study was conducted to evaluate the effects of water temperature and salinity on growth performance and feed utilization efficiency of giant freshwater prawn {Macrobrachium rosenbergii) Experiment was set up with nine treatments including the combination of three salinity levels (0; and 10%o) and three water temperature levels, at 27 - 28°C (environmental ambient temperature - NDMT); 31°C and 34°C; each treatment was repeated times; the experiment lasted for weeks The results showed that growth performance was affected by temperature (p < 0.05) The best growth performance was found in the treatments rearing at NDMT and salinity levels of 0; and 10%o and they were significantly different (p 0.05) compared to the treatments of prawn rearing at 31°C Feed efficiency was also affected by the temperature (p < 0.05) The prawn rearing in environmental water temperature at different salinities (0; and 10%o) presented the lowest FCR and the highest PER which was significantly different from other treatments (p < 0.05) Based on the growth results, FCR and PER, it is indicated that giant freshwater prawn can grow well at salinity of no more than 5%o and temperatures below 31°C Keywords: Giant freshwater prawn (Macrobrachium rosenbergii), salinity, temperature, growth performance Ngay nhan bai: 24/5/2021 Ngav phan bien: 10/6/2021 134 NgUcfi phan bien: TS Doan Thanh Loan Ngay duyet dang: 29/6/2021 ... cho sif phat trien cua tom cang xanh ve tang trifdng U man td - 10%o thi tom cang xanh tang trifdng binh thifdng, man len hdn 10%o thi toe tang trifdng cua tom cang xanh giam dan (Nguyen Thanh Phifcfng... tdOng tac gida man va nhiet len tang trddng cua tom xanh (p > 0,05), chi co yeu to nhiet anh hddng len cac chi so tang trddng cua tom cang xanh (p < 0,05) (Bang 1) Tang tnidng cua tom co xu hddng... sinh hoa cua tom cang xanh khong co sd tddng tac cua man va nhiet (p > 0,05), ngoai trd ham 1ifpng protein tom co xu hifdng giam man tang, qua trinh tich luy protein tom cang xanh giam (p < 0,05)