The effect of sex upon growth in the pig / being the thesis submitted by

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Copyright is owned by the Author of the thesis. Permission is given for a copy to be downloaded by an individual for the purpose of research and private study only. The thesis may not be reproduced elsewhere without the permission of the Author.

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MASSEY AGRICULTURAL COLLEGE LIBRARY

PALMERSTON NORTH. N.Z.

Number Class Location

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THE EFFECT O:B' �EX UPCr \..t�OWTH Iti 11HE I IG.

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Being the the�in submitted by

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for the M. Agr. �c. de6ree

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C 0 N T E N ^T ^f,.

INTRODUCTION • • • • • • • • •

1. The Expe r i ment a l Ma t er ial

2. �e lec t i o n o f t he Anima ls Spayi n g and ca st ra ti on

• • •

• • • • • •

4. �mplo ymen t o f a st anda r d gro wt h o�r ve wi t hi n groups ^{• • •} ^{• • •}

5. ^.H^a^{t i}^o^{n. used} ^{• •} ^{• • •} ^{• • •} ^{• • •} ^{• • •}

• • •

6. �ea r i ng o f £1gs an d �ro w t h uurves at tained •

1

11 1 3 15

17

19

21 7. �la ught er , Dre s s i n g and �t o ra ge o f Car �a ses ^• 26

8. Bod y and oa roa se Mea s ur emen t s ^{• •} • • • • • •

9.

Jo i n t in g a nd Di esec t i o n • · • • • • • • • • •

10. Hi s t o lo gi ca l t h o d ^{• • •} ^{• • •} • • • • • •

11. �ta t 1s t i oa 1 �reat ment o f He�ult s ^•^{• •} • • •

PART II ^... ^.LXP-. ^fULTS.

1. Effec t o f �ex upo n bo dy pro�o rtion s • • • •

• .Effect o f Sex upon Co mpo si t i o n o f .Le g

and Lo in Jo i n gs • • • • • •

3 ^• .Effec t upo n Or ga ns a nd O ffa ls • • • • • •

4. Effec t o f �ex upo n Ti ss ue s (a ) Effect upo n Bone (b) Effec t upo n Aus c le (c ) Effec t upo n ¥a t

5. £ffeot o f �ex upo n ua rca s e

i n Lo i n an d Leg

• • • • • • • • •

a sur ement s • • •

6. J!;ffec t o sex upo n His to lo gy of .Musc le • • •

(a ) Effec t upo n diamet er o f muscle fibre (b) Effec t u;on t h e �i ze of t h e .uus ole

.Dun d 1e s \Gra in ) • • • • • •

l c) Effec t upon In t ra-lHE ou Jar Fa t ^{• • •} 7. Effec t o f sex upon Fo od vo ns umpt i o n a nd

llti lie a t i o n • • • • • • • • •

Sm.uURY • • • • • • • • • • • • • • • • • •

CONC IIJSIO�T . ^. ... . ^.. . . . ... . ^.. .ttEFERENOES ^{• •} ^{• • •} ^{• • •} ^{• • •} ^{• • •} ^{• • •}

APPENDIX ^{• •} ^{• • •} ^{• • •} ^{• • •} ^{. . .} ^{• • •}

27 27 29 31

33

37 47 52 53 57 5 8 58 66 64

69

70 72

80 85 87 90