Reproductive Physiology & Vet Care Of The Boar

Question 1

T or F: testes are fully descended at birth

Answer 1

True

Question 2

2 phases where sperm proliferation occurs

Answer 2

• birth to 1 month
• 3 to 4 months

Question 3

Spermare in epididymis @ age

Answer 3

4.5 months

Question 4

Libido and ejaculation present @ what age

Answer 4

After 5 mos

Question 5

Juvenile penis lacks _____ and is attached to prepuce by ______

Answer 5

• sigmoid flexure
• frenulum

Question 6

Breedin soundness exam tests include

Answer 6

• locomotion
• atrophic rhinitis
• parasites
• infectious disease test

Question 7

External genitalia soundness exam includes

Answer 7

• testicular palpation & measurements
• palpation of penis and sigmoid flexure
• eval of prepuce and preputial diverticulum
• exam of nipples

Question 8

Semen collection methods

Answer 8

• double glove (vinyl) hand technique
• artificial vagina
• electroejaculation

(Afterwards give 2-4 days of sexual rest)

Question 9

Pre-ejaculate contains

Answer 9

• prostatic & seminal vesicular fluid
• 5-15 mL
• clear

Question 10

Bulbourethral gland produces

Answer 10

Gel fraction

Question 11

Volume of semen usually prod.

Answer 11

• 1to 300 mL in young boar
• more than 500 mL in adult boars

Question 12

Characteristics evaluated for semen

Answer 12

• motility
• morphology
• total sperm count
• concentration

Question 13

Watery sperm conc.

Answer 13

0-200x10^6 ml

Question 14

Milky semen conc.

Answer 14

200-500x10^6 mL

Question 15

Creamy semen conc.

Answer 15

500-1000x10^6 mL

Question 16

T or F: boar nees to be trained to use phantom. Needs to se other boars have their semen collected.

Answer 16

True

Question 17

How many semen collections per week if older than 12 mos

Answer 17

2

Question 18

Use what hormone before collectioin

Answer 18

PGF2-alpha

Question 19

If boar is less than 18 mos, collect semen how often

Answer 19

Once every 7-10 days

Question 20

If boar is 8-10 mos, collect semen how often

Answer 20

Once every 7 days

Question 21

If boar is 10-12 mos, collect semen how often

Answer 21

Up to 3x in 14 day pd. Every 4-5 days.

Question 22

Short-term semen extenders

Answer 22

Guarantee quality for a couple days

Question 23

Long-term semen extenders

Answer 23

Maintain biological value of sperm up to one week or longer

Question 24

Dose of semen is how many mL

Answer 24

80 mL

Question 25

How many sperm per day of storage

Answer 25

1 billion

Question 26

Temp semen is stored in w/ constant agitation

Answer 26

15-18 degrees celsius

Question 27

W/ extender added, the final conc. Of semen should be

Answer 27

25-80x10^6 sperm/mL

Question 28

Insemination dose formula

Answer 28

Volume x sperm per mL x motility x normal morphology/minimum insemination dose

Question 29

Boar semen doesn’t respond well for cryopreservation b/c

Answer 29

• they aren’t protected by an egg yolk or milk proteins from the cold
• glycerol is toxic to them
• they have low cholesterol/phospholipid ratios in their membrane

Question 30

What is the conception rate for frozen semen compared to fresh/cooled semen

Answer 30

20% lower

Question 31

Issues seenwith semen collection/breeding males

Answer 31

• diverticulectomy
• testicular/scrotal hernia
• preputial prolapse
• persistent frenulum

Question 32

Divertiulectomy procedure

Answer 32

• 5-8 cm incision on dosrsolat. Aspect of prepuce
• blunt dissect. Of both diverticular sacs
• ID neck of diverticulum
• place purse string suture around neck of diverticulum
• don’t tie off neck of diverticulum until grasped w/ allis forceps & inverted out preputial orifice
• tie knot, close w/ 2 layer continuous suture pattern