Comparison of Carcass Composition of Iranian Fat-tailed Sheep

Transcription

1 1348 Comprison of Crss Composition of Irnin Ft-til Shp M. R. Kiynz* Animl Sin Rsrh Institut, P.O. Box, , Krj, Irn ABSTRACT : Most rs of shp in Irn r pt to thir gro ologil nihs whr it is likly tht thy wr lso rtifiilly slt y thir ownrs. In gnrl, most of shp rs r multipurpos prouing lms, wool n milk. To ompr th physil n hmil omposition of th rsss of tn Irnin ntiv ft-til shp rs, 243 ml lms (6-7 months of g) of tn fttil, Irnin rs of shp, Snji (S), Ghzl (G), Afshri (A), Mhrni (M), Lori (L), Lori Bkhtiri (LB), Kori Khorsn (K), Sngsri (S), Bluhi (B) n Chl (C) wr stui. Lm r group h signifint (p<.5) fft on ll th rss trits msur. Th LB n C lms show th sm liv wight whih ws signifintly (p<.5) highr thn th othr rs. Crss rssing- out prntg in S lms ws lowst (p<.5), ut not iffrnt from G lms. K n S rs show th highst (p<.5) rss rssing-out prntg. Th S lms h th highst (p<.5) ln mt prnt. Ln mt prntg ws not signifintly (p>.5) iffrnt in th G, A, M n C rs. Th S n K rs show th lowst ln mt prnt. Th S lms show th lowst (p<.5) ft prnt in thir rss, whil K n S show th highst (p<.5). Suutnous ft in K, S n B ws highr (p<.5) thn th othr rs. Lms of S, G, A n M rs h th lowst suutnous ft in thir rsss (p>.5). Intrmsulr ft ws signifintly (p<.5) lowr in M, S n C spit th ft tht this vlus wr highst in B n K lms. Th K n S rs h highst ft-til prntg (p<.5) in thir rss, whrs S n G show lowst. Lms of G, S n A rs h highr on prnt thn othr rs (p<.5). Lowst on prnt (p<.5) ws sn in K n S lms. Th rss moistur prnt ws not signifintly (p>.5) iffrnt in S, G, A, M, L n C rs. M lms show th lowst ru protin prntg n S r th highst (p<.5). Thr wr no signifint (p>.5) iffrns mong othr lm rs for this trit. Chmil ft prntg ws th sm in S, G, A, C n M rs, ut signifintly (p<.5) lowr from LB, K, S n B. Ash prnt in S, G n A h no signifint (p>.5) iffrn. Aoring to highr ln mt n lowr ft prntgs in th rss, th rnking of rs woul S, G, A, M n C. (Asin-Aust. J. Anim. Si. 5. Vol 18, No. 9 : ) Ky Wors : Irnin Shp, Lms, Ft-til, Liv Wight, Crss Composition INTRODUCTION In Irn, r mt is ommon sour of protin. Th vrg r mt onsumption pr pit is 14 kg. Th min sours of r mt r ttl, ufflo, shp n got. Th shp popultion in Irn is 5 million, omprising 26 gnti groups. Mt proution y shp n got mounts to 57% of th totl r mt proution in th ountry. Shp r kpt for mt, wool, milk n plt (Osfoori n Fsus, 1996; FAO, 1998; Kiynz t l., 3). Most rs of shp in Irn r pt to thir gro ologil nihs whr it is likly tht thy wr lso rtifiilly slt y thir ownrs. In gnrl, most of shp rs r multipurpos prouing lms, wool n milk. Th rs r nm in rltion to thir pl of origin or th tri of th ownr. Almost ll shp rs of Irn r inignous n hv not yt n rgistr in forml ring progrms. Irn posssss rs of shp n 5 rs of gots. Approximtly 65% of th totl shp popultion is onsir pur n 35% rossr. Mor thn 96% of Irnin shp r ft-til n th rmining 4% r thin-til n smi ft-til. Zl is th * Corrsponing Author: M. R. Kiynz. Tl: (4), Fx: , E-mil: kiynz@yhoo. om Riv Novmr 11, 4; Apt Mrh 14, 5 only thin-til shp rising in th ountry (Kiynz t l., 3). Th proportions of ln mt, ft n on in th rss trmins th rltiv mrit of iffrnt rs for mt proution (Fri, 1991). s of shp hv n shown to iffr signifintly in proportions of rss musl, ft n on n in thir istriution (Tylor t l., 1989; Emmjomh, 1993; Bourn, ). Informtion on th rss omposition of th ntiv shp rs in Irn is vry sr n suh informtion is ssntil in plnning ring progrms. This rport omprs th physil n hmil omposition of th rsss of tn Irnin ntiv ft-til shp rs. MATERIALS AND METHODS Animls Two hunr n forty thr ml lms (6-7 months of g) of tn ft-til, Irnin rs of shp, Snji (S), Ghzl (G), Afshri (A), Mhrni (M), Lori (L), Lori Bkhtiri (LB), Kori Khorsn (K), Sngsri (S), Bluhi (B) n Chl (C) wr stui. In rif, S, G, M, L, LB, S n B r rng shp n r mng minly unr migrtory systms with lmost no supplmntl fing ut, in fll n wintr, thy r f forg n post hrvst rls. A, K n C r mor intnsivly frm rs. Th A, K, LB n C r ig in siz (mtur ml vrg 7-9 kg) whrs G, S n L r mium (mtur

2 CARCASS CHARACTERISTICS OF IRANIAN FAT-TAILED SHEEP 1349 Cutting sits: 1-Btwn th 7 th vrtr of nk n 1 th vrtr of loin 2-Joint of shoulr l 3-Longitunl ut from th first ri long th loin n k to th lg utting point 4-Cut through th lst vrtr of loin (lumr) n th first til on (through th slip joint) 5-Joint of th first til on to th rss 6-Cut twn th shoulr l on (strnum) n rst on to sprt th shoulr Prts prou: 1-Nk 2-Shoulr 3-Brst & Flnk 4-Loin & Bk 5-Lg 6-Ft-til Figur 1. Sits of utting of lm rss n th prts prou. ml vrg 6-7 kg) n B, M n S r smll (mtur ml vrg 5-6 kg). Lms wr slt n purhs from th Rm Pivot Projt (RPP) in thir ring r (sprt in iffrnt prts of Country). Sltion ws s on thir hlth (oring to insption tst y vtrinrin) n g (5-7 months). Lms wr wn t 3 to 4 months of g in ll rs. Aftr wning th lms of ll rs wr f n mng minly unr rng systm with no supplmntl fing. Th nimls wr trnsfrr to th Animl Sin Rsrh Institut in Krj. Crss nlysis Tow wks ftr trnsfrring nimls of h r wr wigh n slughtr. H, ft (inluing mtrpls n mttrsls), skin, igstiv trt (mpty n full), livr, lungs, hrt, kinys, plvi, kiny n omntl fts, spln, iphrgm, n gnitl orgns, wr rmov n wigh uring rssing. Th rminr ws wigh s hot rss wight n stor in ool room t 4 C for 24 h. Th rsss wr thn split longituinlly n th right si ws us for rss msurmnts. Th lft si ws ut oring to th tritionl mtho into six iffrnt joints (nk, shoulr, riskt n flnk, loin, lgs n ft-til) (Figur 1) whih ws wigh (Kiynz, 4). Eh joint ws isst into ln mt, intrmusulr n suutnous ft, n ons. Aftr sprting ll rss tissus, totl soft tissus wr groun two tims through plts with 4 mm hols. Gr smpls (pproximtly 15 g) wr tkn for trmining moistur (using rying unr vuum t 95- C), ru protin (trmining nitrogn in Kjlhl mtho (N 6.25)), sh (y ininrtion t 6 C) n hmil ft (y Soxhlt xtrtion) oring to th AOAC, Dt nlysis Th t wr nlyz y SPSS for Winows (SPSS, 1999). Th t on omposition of h hlf rss, n th omposition of h wholsl ut s prntg of th sm omponnt in th hlf rss wr nlyz. Th fft of r on th trits unr stuy ws trmin y using F rtio tst. Mns, vrins n stnr vitions of h trit wr lult. Th signifin of th iffrns twn mns of th vrious rs ws tst with Dunn s nw multipl rng tsts (Stl n Torri, 198). RESULTS AND DISCUSSION Lm r h signifint (p<.5) fft on ll th rss trits msur (Tl 1). Lowr liv wights wr sn in M, L, S n G (p>.5) rs. Th K lms h signifintly (p<.5) highr liv wight thn th othr r groups. Th LB n C lms show th sm liv

3 135 M. R. KIYANZAD Tl 1. Mns (±stnr rror) of trits msur in ml lms of tn Irnin ft-til rs (rnk oring liv wight) Trits K LB C A SA B L G S M Numr of lms Liv wight (kg) (8.3) 36.1 (5.5) 34.4 (5.5) (3.4) 31.2 (4.4) Hot rss wight (kg) (1.5) Ln mt (kg) (2.7) (1.3) Totl ft* (kg) 7.1 f 4.8 E Suutnous ft (kg) Intrmusulr ft (kg) Ft-til (kg) Bon (kg) Drssing-out % (2.9) (3.1) 43.9 Ln mt % (7.6) 55.9 (2.7) 56.6 (2.6) (3.) (3.7) Totl ft % 2, * 31.1 f f (5.1) (3.6) (3.4) Suutnous ft % (2.) (1.8) Intrmusulr ft % (.9) Ft-til % (5.1) (2.9) Bon % (1.7) (2.) (1.8) 17.9 (1.3) (2.1) 21.8 (2.1).1 Moistur % (7.9) 57.8 (11.7) 67.1 (12.3) (17.4) 6.4 (18.7) 63.7 (.4) 69.4 (7.9) 68.5 (4.8) 7.5 (15.6) Cru protin % (4.1) 15.3 (5.4) (6.4) 14.8 (7.1) (1.7) 13.4 (7.) Chmil ft % (7.6) 25.8 (9.6) (12.6) 23.5 (11.8) (5.4) 11.9 (4.6) 14.8 (8.6) Ash % * Inluing suutnous ft, Intrmusulr ft n ft-til. 1 Bs on liv wight. 2 Bs on ol rss wight. 3 As prnt of soft tissu. Mns within row tht o not shr ny suprsript lttrs r signifintly iffrnt t th 5 prnt proility lvl. wight whih ws signifintly (p<.5) highr thn th othr rs xpt K. Liv wight mntion y Hll () t slughtr of Suffolk (36.26 kg), Txl (35.67 kg), Shropshir (36.13 kg), Dorst Down (35 kg) n Ryln (34. kg) wn lms tlly with A, S n B rs, whil LB, K n C r hvir. Th B lms in this stuy wr hvir thn th lms of th sm rs us y Fri (1991); howvr, th M lms h stui, wr hvir thn M lms us in th prsnt stuy. Th iffrn my rlt to th iffrnt g n systm of ring of lms (th lms wr flot in his stuy). Kirton (1995) rport hot rss wights of 15 lm rs rng kg for flot lms tht is tlly with S, G,, M n L, rs in this stuy. Crss rssing-out prntg in S lms ws th lowst (p<.5), ut ws not iffrnt from G rs (Figur 2). K n S rs show th highst (p<.5) rss rssing-out prntg. Sm rss prntg h sn for C, B, LB n A (p>.5). Liv wight (34.41 kg) rport y Mhgou n Erly () for Omni ml lms tlly with S, G, L, S n B rs in prsnt stuy. Howvr, hot rss prnt (53.53) in his rport is highr thn rs mntion ov n this my u to using mpty oy wight to lult rssing-out prnt inst of using full liv wight. Th S lms h th highst (p<.5) ln mt prnt (Figur 3). Ln mt prntg ws not

4 CARCASS CHARACTERISTICS OF IRANIAN FAT-TAILED SHEEP 1351 Drssing-out (%) Mt (%) Drssing-out % K LB C A S B L G S M Figur 2. Mns of rss prntgs for th tn lm rs. Kori Khorsn (K), Lori Bkhtiri (LB), Chl (C), Afshri (A), Sngsri (S), Bluhi (B), Lori (L), Ghzl (G), Snji (S) n Mhrni (M). Ln mt % K LB C A S B L G S M Figur 3. Mns of rss ln mt prntgs for th tn lm rs. Kori Khorsn (K), Lori Bkhtiri (LB), Chl (C), Afshri (A), Sngsri (S), Bluhi (B), Lori (L), Ghzl (G), Snji (S) n Mhrni (M). signifintly (p>.5) iffrnt in G, A, M n C rs. Th S n K rs show th lowst ln mt prnt. Th S lms show th lowst (p<.5) ft prnt in thir rss, whil K n S show th highst (p<.5) (Figur 4). Suutnous ft in K, S n B ws highr (p<.5) thn th othr rs. Lms of S, G, A n M rs h lowst suutnous ft in thir rss (p>.5). Intrmsulr ft ws signifintly (p<.5) lowr in M, S n C rs ws highst in B n K lms. Th K n S rs h th highst (14.8 n 15.1% rsptivly) ft-til prntg (p<.5) in thir rss, whrs S n G show th lowst (4.5 n 6.1% rsptivly). Lms of G, S n A rs h highr on prntgs thn othr rs (p<.5) (Figur 5). Lowst on prntgs (p<.5) wr sn in th K n S lms. Emmjomh (1993) rport lssr ln mt n on prntg, ut highr ft prnt in th C r rm lms. Th iffrnt my rlt to th g of flot rm lms us in his stuy, whrs in this stuy lms wr not Ft (%) f Totl ft % K LB C A S B L G S M flot. Kiynz, (2) rport lssr ln mt n on prntgs (44 n 14.7% rsptivly), ut highr ft prnt (36.6%) in C lms r. Diffrn woul rlt to tht th lms in his stuy wr flot. Th moistur prntg in soft tissus of rss ws not signifintly (p>.5) iffrnt in S, G, A, M, L n C rs. Howvr, LB, K, S n B show signifintly lss (p<.5) moistur prnt in th soft tissus of thir rss. M lms show th lowst ru protin prntg n th S r th highst (p<.5). Thr ws no signifint (p>.5) iffrns mong othr rs for this trit. Chmil ft prntg ws th sm in S, G, A, C n M, ut signifintly (p<.5) iffrnt from LB, K, S n B. Ash prnt in S, G n A h no signifint (p>.5) iffrn. Fri (1991) rport lowr moistur n ru protin prntgs, ut highr hmil ft prntg for M n B lms. This iffrn ws proly u to highr ft prnt in th rss of th flot lms in his stuy. f Figur 4. Mns of rss ft prntgs for th tn lm rs. Kori Khorsn (K), Lori Bkhtiri (LB), Chl (C), Afshri (A), Sngsri (S), Bluhi (B), Lori (L), Ghzl (G), Snji (S) n Mhrni (M). Bon (%) Bon % K LB C A S B L G S M Figur 5. Mns of rss on prntg for th tn lm rs. Kori Khorsn (K), Lori Bkhtiri (LB), Chl (C), Afshri (A), Sngsri (S), Bluhi (B), Lori (L), Ghzl (G), Snji (S) n Mhrni (M).

5 1352 M. R. KIYANZAD Kiynz, (2) rport lssr moistur n ru protin prntgs (47.3 n 13.1% rsptivly), ut highr hmil ft prntgs (37.2%) in C lms r. Kirton (1995) rport moistur prntg of 15 non ft-til rs rng tht is lssr thn rs in this stuy. Th iffrnt oul rlt to tht th lms in his stuy wr flot n fft of r. Th ru protin rport y him in iffrnt rs (rng ) tlly with LB, S, B n C rs in prsnt stuy. CONCLUSION Whn th liv wights of th lms wr ompr, thy rnk K, LB, C, A, S, L, B, G, S, L, LB n C. Howvr, K n S lms show th highst rss prntg, thy h lowr ln mt prnt n highr ft prnt in thir rss. Th S r h highst ln mt n lowst ft prntgs. Lowst on prnt ws sn in K n S lms, whil th highst vlus wr foun for G, S, n A lm rs. Aoring to highr ln mt n lowr ft prntgs in th rss, th rnking of rs woul S, G, A, M n C. ACKNOWLEDGEMENTS I woul lik to thnkful for Dr. Allmh, Dirtor of Animl Sin Rsrh Institut of Irn, my o-workr Mr. Monm n workrs of Shp n Got Stion of Animl Sin Rsrh Institut for thir vi, support n frinly rltionship. REFERENCES Assoition of offiil nlytil hmists Offiil Mthos Of Anlysis. AOAC, Wshington, DC. Bouron, R. M.. Unrstning niml ring. Prnti Hll, In USA. Emmjomh, N Stuy on fttning potntil n rss omposition in Chll n Zni shp n thir riprol rosss. Irnin J. Agri. Si. 24(2): FAO Foo n griultur orgniztion of th unit ntions. Qurtrly Vol. 11. Fri, A Crss physil n hmil omposition of thr ft-til rs of shp. Mt Si. 29:9-1. Hll, S. J. G. n R. Hnrson.. Rr n minority British shp for mt proution. Smll Rumin. Rs. 35: Kirton, A. H., A. H. Crtr, J. N. Clrk, D. P. Sinlir, G. J. K. Mrr n D. M. Dugnzih A omprison twn 15 rm rs for xport lm proution. 1) livwight, oy omponnts, rss msurmnts, n omposition. NZ. J. Agri. Rs. 38: Kiynz, M. R. 4. Using linr oy msurmnts of liv shp to prit rss hrtristis for two Irnin fttil shp rs. Asin-Aust. J. Anim. Si. 17(5): Kiynz, M. R., J. M. Pnnm, N. Emmjomh Kshn, Z. A. Jln n I. Dhln. 3. Rproutiv prformn of thr Irnin shp rs. Asin-Aust. J. Anim. Si. 16(1): Kiynz, M. R., J. M. Pnnm, N. Emmjomh Kshn, Z. A. Jln n I. Dhln. 2. Crossring of thr Irnin shp rs with mphsis on growth n rss hrtristis of th lms. PhD thsis. Univrsity Putr Mlysi. Mhgou, C. D. n R. J. Erly.. Effts of itry nrgy nsity on f intk, oy wight gin n rss hmil omposition of Omni growing lms. Smll Rumin. Rs. 37: Osfoori, R. n L. Fsus Gnti rltionships of Irnin shp r using iohmil gnti mrkr. Arh. Tirz. Dumm Rstorf. 39: SPSS SPSS for Winows. Rls.5, Stnr vrsion. Copyright@SPSS In., Stl, R. G. D. n J. Torri Prinipls n prours of sttistis. M Grw Hill Book Compny. Intrntionl Eition. Tylor, S. C. S., J. I. Murry n M. L. Thonny n sx iffrns mong qully mtur shp n got. Anim. Pro. 49:385-9.