Basic Dairy Cattle Biology

5 bill f or other infor ma tion on sta te a gr ic

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Unformatted text preview: =$43. 5 bill) F or other infor ma tion on sta te a gr ic ultur e go the Depa r tment of F ood a nd Agr ic ultur e website. Or , for a list of Ca lifor nia ' s top c ommodities, just c lic k. B . B a s i c B i o l o g y o f B o s Ta u r u s ( s a me fo r D a i r y C a t t l e as i n Be e f C at t l e ) a ) Puber ty: 11- 14 months in heifer s; 10- 12 months in bulls (between 600- 800 lbs depending upon br eed a nd sea son) b) Repr oduc tion: N onsea sona lly polyestr us - If not impr egna ted, c ows will c yc le in a ll sea sons of the yea r , however , a s the temper a tur e c limbs some c ows a r e less likely to expr ess the visible signs of estr us (e. g. , sta nding to be mounted, exc ita ble a nd ‘ ner vous’ beha vior ) Estr ous Cyc le - 21 da y a ver a ge (19- 23) Estr us Per iod - la sts 12- 20 hour s Ovula tion - 12- 15 hour s a fter the end of estr us Gesta tion - 281 da ys (longer in la r ger br eeds) c ) Digestive Ana tomy: R...
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