Observations on the gestation period of Ronderib-Afrikaner sheep

(1)

01Hfr.r.<tt'/11111rl ./nu,.,10/ of

l

'l't1•r·111111 !J .'\r1P11rP nnrl .l11i11111!

/m/11.<./l'.11, rohi1111· 12 • . \'11111lw1· I . .1111111,,r!J. J!J:~!J.

l'rillletl i11 tli(• r11io11 ul !--n11tli .\lrin1 II~· tlw Gonff1111wr1t l'1·i11ll'r, l'1·<•torin.

Observations on the Gestation Period o f Ronderib-Afrikaner Sheep .

II, \' .J OHX

<H~lS

L.\X , St><·f i1111 of :-;u1· µ·.,,.,,. arnl H,,·11111·<'olng ·,\".

011<lP1·~f1•1H1ort,

(. '. ('. ( ' L.\ ASS l·;,\S, H. l'.

lHISS~L\ a11d

J> . JJ . llOSJ.:.

l>

ivi:-;i11t1 ot .\ g- ri<·111tu1·n l Et

l11

catio11 011d

l~:dp11,..io11.

\·~:1n lilllP j, k110,n1 ot

tht>

11rii.ti11 111 1ht•

l{ omlP1ih-.\ fr ika111'!'

;..hpc•11,

hut il

j.., J:Pllt>I

all_,.

b~lit>\'l'd

to

^h¹¹^\'^P

lwen clt>wl opt•rl

h~

..,t>l1•1·ti11n ll'('lll llw i11tlig-f'nou,.; :-:lwc•JJ cit th1• l'nt-1:1ilt>1l 1y1w '' hi1·h "'"It' i11 the 1w,.;,,l';..,.io11 ol t he l-l1•1tf'nlob

wh1·11

llw

(\tpt·

,,·,1.s ^fir,.1

^0tT11pi1·^d ¹¹¹

11;;,~1.

'l'li P H1111il<•rih-• .\hiJrn11t1Pr

j,.. " ,·er~·

hnnly hn•t•tl 11 11d i:< to he lou11d mnst l,\·

i11 thi> 111._, .

.'io 1 ·th \

\'t>11krn

(listi·id s (1 1' tlw

Cape

l' r0\·i11<·l· .

.\s

ilw lll't>Prl

11111sf

of'

11t•t·E's~it>· n111li1111t•

In pb y :111

i1t1pcH'l;1llf pad

in

tht> f'ar111i11g· S,\'S(l'lll

of' ihe

lllcll'l' arid l'f'gi1111:- i11

t

ht'

C 11it111 nr Stinth .Hri(·:1. it

11

u-. df'1·irh·d fo ohfain dul:1

011

tlw ag-1' ut "PXual ma tm ity. 0P•dr11, .;. I h1·

111·~t1·ou;;

<·.\·1·lP. n11d

t

h 1• g't"•lalion

pt>ri1

d 11 1

lhl't.P

,.hf'ep. Th i-.. puhlinifinn rl•'<d"

11111.'

with tlu• g-p.;tali1111 pp1·i11d.

T

ht· ot hf'1 a:<p1>1•1.;

11 I

I

ht· -,11111.\ 1111 t

lwi r

't'.\-ph,\ ...

i olog-\' will appt>ar lntn.

Jl

t•:'J llOll.

'l'h1•

l'hl'P(J \\'t'l'L'

t<>,.:tf'd

n111"·

tlni ly . 111 tlw !'arl.\ 111 111·1 1111g" for

11es1 t'lls

l>y n .;;i 11 g-

1

·H.;N·lo111i1wd ..

f~·ast'l"' .

Thn."E' sl1owi11g O<'slr11, ., wen· pf;11·1'<l in a ><lH·d t11L(

il lnl1•r ll'ii<'11 f.ltl'.\'

11·pn• u

ll

oll'Pd 1101·111al ro p11l1\lio11 , 11s i11g· ;wl ecit •d n1111-.;, ur

lht',\'

,,·pn• arlil i1·iully imw111i11atcd.

ll nud ,,•n·i1·p

··

"·a,.

(•111111111•11(·1·<1 1111 :I() 1-t/:H;

and di!"1·011ti1111t'1l nr1 21 f j / :11>. Smue of thl• H1111d1•rili-.\ l'i·ikant·r

t'\\t"' \l'<'l't•

111;dt•d 10

a ra111

ol lht> ... ame 11rPt>tl. nt l11•r ....

111 a

\Y t'J.,Ji )Lou ntai11

r:111l.

'l'ht' l::i.llt>l' ram f'xpe ricn <·ecl

g-1enf dilli<-1111~·

i11 111ating- with tl111.;1•

(•wp;;

with l'.\c·t•plinnnll.'

lar!!'1'

tail ...

a11cl

cll'Oopiug

l'llill(h.

;mil artifiri:d

i!l~t·mi11ulio11

\\· a-: 1·e"ndNl io in

tl11'-w r·a~c·

....

'l'li p

t'\.<H·t

hou 1 · nf

st>n

i(·v

\\'1h 11nl t't•conl~·d. ln1l

ull "f. ·1·,· 11·t>s wer('

dn1w

hehn•Pn 8

•1.111.

ancl I 0 a

.111.,

t·o11i::eq11r1 dly !J

:1.

m. is lakt>u :1H

I

Iii' a\'1

·1·11µ-P 1

i111e of

~l'n·i<'<'

in

1111•

f'p

llmYi11g- calt-11h1!

ion;<.

::?n

J

(2)

0Jo:l'TA'l'JON PEJtIOD OJ:' llONDEl!l 11-.\FltJ'KA;':JW ~UEJ-~P.

During gest <1I iou ihe ewes "ere ru n unde1 ordinary li.urrcH1-vt' l<l 1 ·<1u<lilions, but ''"ere b1·011gl1t iuf· o a lnaal foi cl ose ohserYation nae wef'k p1·ior lo !he dah" on whieh they "·e re exped1>d In hilllb.

Coufine nwul al th

is

J.Jetiocl was

1H•<·esf'<1l'Y

so that the ew1>s rould

lw

kept under c ;oustnot ohsorvatiou 1hU"i11g- the

1la~...

l 11speclio11s d m·iIJf!' I he nig ht wt'l'e l11<1de at t lnee hourly i1dcrYak 'l'he g ·(•,;lal ion periods are, therefore, eulc- uln ted In t he uearest 11.iree hour>'.

'rhe followjup: cli;;tributio11 of th e g<'stalion perio

ds

. iakt-'11 io tlw 11e:

:

11·esl 24 hour,;, gi,·es a

s11111rnarised

retlf'<;t ion of the resulL"'

olJLaiut>d :- -

Grst11Lion period in days ... 1146 147 148 I

149

I

^lij() ^1:;1 J 52 1163 liH 15~;

· - -

1

- - - -- - --- - - - - ----

^- ^-

Dist.1·ih11Lion of l;tmbing .... :3 I 6 :1

I

¹¹

I

ⁱⁱ

_{" I}

4

In Tahlt> 2

c~rrnplel('

detail,; of -tl i11rliYi1lua1 e w('s, n:=-erl for nhserv;1 ti on.

~1Tf g-n-Pn.

Drnl T SS 1 os.

Tlw ge:;lnlioJl periods of - 1 1 sheep

sho\Y~·d

a raug·e of

l..J.-~1 d:iy;;

12 honrs lo ]:);) days 9 hour;;, ,,·ilh n rnolle of 14H days,

;111cl a HH'au

nf JJD · 57 tla.\·s. 'L 'his <luratiou of

ge,~taiiou

is shode r than that ret·cwdt•tl Ii.'· (.-l uii.ilun. J\[are ai1d Roux,

H):l;2,

for

·

M:erino . o;lieep kept in n ,-irni lar tJnvfroninenl. These autho

r,;

l'N·or<l<>tl the 1luratin11 ot fhf' g-1>statin11

pniorls

of 9H Jieri110 s

l

wep. Th<> range wa;; from 14() to 16G da_ n,.

an(l lhe

mc~an

150

·

9 lht,vs.

t)Ul'Nf11-\N, J., ;\fARB. G. S., .1No ROUX. C. L. (1932). The Vitality of the Spermatozoon in tire GPnit:tl 'l'r·:H·t of tlrte 1forino c•we, with special rcft•rcnce to its l'ractic:il Appli1:atio11 in Breeding. 18th llept. ])ir. 1·et.

Serr. and Anim.. Ind. U. of S.rl.

252

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'J'.\111.E

2. ...

(Jc.,luti1111 l\·l'i<>d. Ewe No. Date s..,rvecl.

B y

Ram.

I

^Da

ti' L:rnt l)('d. II 11tll'. J,nmh ~(). Birth \\'t. lb.

I

Dt\,I'~. Ho11r•. '/, :.-

I

...

im

1 ... 'l3/f;i/:~6 \Y)L 3 ... :?:I/ 10/:Jli l;!.:10 p. in. \\'H. 87 .... 6·8 I :Vi :I! \)

... ...

1'1./5/'?.6 WM. :L ... S/ 10/:lfl 111 ..

w

p.m. 7G .... 7.;1 J4l)

II!

~ 1:1 •... l'i/5/36 W".\1. :1 (11.R.)* .... 1 :111

o ; :rn

H.oo n.111. 7·0 I iii (I r: 14 ... 17/H/36 \\':IL :L ... ll\111/:1(; ~.:1:i p.u\. l\l(J. ... 8·1 I:'\:.! I:.! Iii,. .... 10/(i/:~6 \\')f. 4 ... 7/11/:J(l (\,.j(j 11.rlt. fl8 ....

( )· s

1 l!l :!:.?

,.., -

I(). ... J!J/{i/36 \\'1[. 4 ... 1~/l I /:16 :i,30 p.111. 10;! .... 8·7 l:i:! s~ :.- 17." ... 7/H1:16 \DI. I (l>.H.)t .... 2 11 /:lfj (UltJ JI.Ill. !J.) .... 7· l 148 !I ;... NI tr. C• :16 ... 1;;;;; :l6 ")[, :1 •.•. ••·•••• I:?/ 111/:111 11.110 11.m. 7!l .... 7· I l!iO II '/ c.:i 38 •... 616/:!6 \Dl. 4 ... :1, ll /:lli :1.;111 JI.Ill. !Jtl •... 6·9 liitl f\d C'l .10 ....•• 'l'J/'>/:l6 \Y)f. 3 ... 2;;, 1111

:rn

!1,110 ti.Ill, !JH .... 6·7 J.i:{ 0 y .fl. ... :!3;i3/36 \\')[, :3 ... !!I 1111 :lH H.oo n.111.

s+ . ...

6·8 1.)(1 :?I

=

•14 ... 18 'i\/:ltl \DI. :L ... 14JI0, 36 11. !""> H.lll. 82 ...• 7·H 1-l!l :? 4!l. ... :? 6 36 \Dl. I (U.R)t .... :21.l Ill :JG 'i.:lu p.m. \I:? .... 6·() 14!1 111.i ('; iii ....•• :!7 ;)/36 \\")[, :L ... :?:1 JO

:rn

HUHl:i.m. 81i. ... 7·0 1111 I 5-1 ... IU/5!3G \nt. 3 ... I:? 10,:111 ll.00 p.111. 80 .... 7·:1 I l!t \I 126 ...

:m

1+;36 \\')L :l ... 27 II :111 11.:l.i p.111. IJ.t •.•. 7·:! I.ill 14! ~ 127 ... :! 5136 \nL 3 (l".~.)· .... :!.l !I :iii 11.:Jll II.Ill. !ii. ... , ... i 1rn

.. ,

·r

:i1 ::::

I:!

...

:1;.~

: rn

\\")L :1 (l'.S.)* .... :!!l !I

:3n

I :!.4.i p.111. tlS .... .>·6 1-111 :.- 130 ... 11 /."Vil6 "'~r. :1 ( l'.S.)~ .... Ii 111 31i 7,t:; .l.lll. 117 :?:l 13:? ...

..

5 36 \r~l. :1. ... :J lfl :111 7.-111 n.m. 7~ .... 7·:? I.ii :!:I 'Z 1:13 ... :?/;,;:36 \\")[. :1 ... :!lS !I

:rn

:l.OO 1t.ttt. llu .... S·IJ 1-18 IS c:: 136 ... l!.jtr/36 \\'1L 3 ... :; JO :!fl I:! noon. 2:1 ••.. 7·0 1.-,0

:1

~

-=

::;j 0

"' !'1

(4)

l>:i <:,.1 ,f'-

r:""

~o. 1:111 ... l:Hl ... 1111 ... l1l:J ... l·lli ... l·lfl. ... I Ii ... I UL .... I l!l ... l.i:i ... IOU ... 1111. ... IH:! ... ltl I :!.; 11:1 Iii Ill> ... I :!:I. No'l'g: • l'.8.

'l'.u11.~· '.! (1'1111/

in

11rrf). t:1•<1t.ntio11 P!'riocl. Dall' l:'ctH'1I. By Ram. l>.1ll' l..3mhccl. llour. 1,;1111b )\ri. llirth \\·1.. lit. l>n~~. llo11n..

---

:?:?,ii/:111 \\':\f. ;{

...

18/lU/:l(i I:! f\0011 83 .... 7 "'" I hl :1 18/ii/:Hi \\':l\1. :1 (U.8.)* .... 1:!/111/!l(i :J.00 11.111. 77 .... 7·4 1·111 Ill :31/G/:Jli Wlll. 4 .. " ... 17/11 /:lH :i.:IO n.m. 101 .... 7·G l1IH 17 ~ 3/;i/:w \\')l. :3 ... '!.!1/ 11/:J(i 11 Ji.i 11.111. 63 .... 7·11 141~ 1:. 2/.)/:16 \\')f. ;{ (U.8.)* .... ~Ii/ !) 13(1 O.i10 II.II•. 6:L ... 6·:} J.1(1 :!:! :!H/.i

au

\\')f. ;{ (C.S.}* .... :!2 HI

:rn

I I.IHI n.m. S.'i •••• 7·~ 1411

..

!i

.; , :m

\ \'.\[. 3 (l'.8.)* .... :!7 !I 3{; I I .:Jr, p.111. {j.i .... 6·6 I 17 11~ ~!) .j :Iii \\":Ir. :J. ... 2:1 Ill :If, 7.110 p.111. G·!l 117 111 :.!II.~ :!ti \\')f. :L ... :!I !I

:m

:1.:111 I'·"'· 5!l .. } .)·U H7

, .. ' •

(JO •• 4·!1 7 6/3G W)f. -! ... " ... 1/11 :111 . i.IKl JI.Ill. 94 .... G·6 117 N :m;.i/36 \\')[. :1 (l',f;,)• .... :.!II/ !I :u1 11.:;.1 p.111. (ii .... -; ·O 1:;1 1;, l 1/U/31l \\'M. I (D.1'.)t .... :1 II :Iii !l.CKI p.111. \)7 .... 7·2 11:; 12 .'j 6/31l \Dr. I (1>$.)1 •..• I II :10 .i.OOa.m. f1:1. •••

G·i

I Ill :!II II J/:lli \DL :L ...

"

IU :lll 11.1;; 11.111 • ii. ... t;-x 11.;

.... ....

~ ;; :Jli KH. li.i ... 111 10 3H II.IN\ p.111. Im. Iii .... i· I 1:,:; II ~s ~ :111 llR. 1;.· ... :.?;; Ill :1r. 11.1"1 p.m. li!I .... Ii· 1;,41 I.! :10 I :l(J

n

It. Ii.> ... ·••• 2!1

~·

3G 11111111.m. IH .. } 4.:; Ji.j .. :;

. .,

1:;2 II i

.

; 36 HIL li.i ... Ii Ill 31i 11.:!.i

I'·"'·

I iii. ... 6· l:i:! II~ HI.:; 3li Hll. !l.i ... Ill 111 :ltl I:!. Ill p.111. Iii! .... 7·:! 1:.0 :1

-

---- lndirutP• th11t ~t·mcn was wilh<lnrn11 !rum nn !'\II' i11111wd111td,\ 11ft1•1 1111rn1nl 1·op11lt1tiu11, hy 111£'1<11< of n )!I"'" pi1M·tll', rtncl inj1•1'11•d i11 n11 undilntt·al a'<mdilion \\ilh n pip1•lfr intu tho· !'nlllial nlr1·rtlll,\ 11! lht• rngino of th1· l'\ll' to he insl'min11lt~I. t ll.:O-. :-l111lir1tlb thnt l'!'m<'n ""~ t.akt'n frn111 1111• nrt1lrrial \lll!illn nl n 1l11llll\1\ 1•w1:. 11i111t1~I I : 2. "ith (:.P . .'.-8. nnd injt·r·tNI into tlw ••t•rvh nf thl' l·\lt' to I"• it1-1'1ninatctl h.'' n ~11ilaltl1' i:la'' ',\ri111:1• 11111l 1·IH1111t•• 1·11tltt•tt•r. 11-in~ fl \n)!in11l :'JW<'l1lu111 10 i1111mi1u11\' tht• gr11it11I 1"'"'11\!C'.

'=> t'I r:r.

...,

;.. -! c '/

"=

:<: ::0

-

0 0 ':: ::;:; :i ·...:

.., ...

j" , ..,., ::0 ~ ;.. '/. t;! "F

... ~

(5)

.I. l)l.f.\1..1.'\. ( . ( . ( 1 .. 1.1~!-.E.\, II.< . 110'\.'<)I \ .1.'\"Il f'. 0. llO-.;£.

1.-ig. J..--lto11d1·ri IJ-.\ fri kanc•r Ha 111.

Fig. 2.- 11011111-rib-.\frikaner Hum.

(6)

C:ES'L\TIOX P1':1Uf>ll 01•' RO.'iJJl·:Jl l 11-.H'ltl I\ 1:\1"1 !';JIJ::l_;;P.

Fig. !l.- Honderib-Arrikaner Ram showing clt•Y<>lopmPnl ol tile tail.

Fig. 1.- Huuclerih-.\tnknllt'r F:\\t'.

256

(7)

Fig: . . ) . -R u11tl1•ri h·.\ I ri 1111 m·r l·:11·p, 11·i lh In 111I1-..