Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

animal science fall 23 > repro 2 > Flashcards

repro 2 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

what do we mean by repro management

A

Reproductive Management has a different meaning
based on what species or production system it is in: Milk Production vs Meat Production vs Replacement Stock Production. Breeder/Show/Sport vs Companion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

when hormones go bad…

A

recall cylcles of fertilities and hormones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

puberty

A

Acquisition of reproductive competency, also associated with behavioral changes in males and females

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

male puberty

A

Aggression, territorial, muscle deposition, searching for females, mounting activity (libido)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

female puberty

A

Estrus behavior. Increased vocalization, nervous/aggression, searching for males, vocalization, standing to be mounted by males (“lordosis”)
Where do the major sex hormones come from?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

cattle

A

bull, steer cow, cow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

sheep

A

ram, wether, ewe, ewe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

goat

A

buck/billy, wether, nanny/doe, nanny/doe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

horse

A

stallion/stud, gelding, mare/brood mare, mare

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

swine

A

boar, barrow, sow, sow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

poultry (chicken/turkey)

A

rooster/tom, capon, hen, hen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

dog

A

sire, neutered, bitch, spayed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

cat

A

stud/tom, neutered, dame, spayed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

when to remove hormone influences and why females

A

Females: Mostly done in either animals destined to be companions (pets), or in meat production during finishing. Remove disruptive behaviors associated with estrus activity, Remove possibility of unwanted pregnancy (companion animals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

when to remove hormone influences and why males

A

Males: Depends on production outcomes
Meat production – removes libido and allows easier handling (less aggressive) – some species
improves carcass characteristic (Capon)
Companion animal – removes libido and territorial behaviors - less aggressive animal
Sport Animal – in addition to those for companion animal modifies growth rate/muscle
deposition that impacts performance
Both – animal not destined to reproduce in a production/breeding situation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

seman in AV is evaluated for…

A

cell number, motility, live/dead, morphology

17
Q

pedometer based systems….

A

detect estrus for us

18
Q

follicles produce…

A

estrogen

19
Q

estrogen is produced in response to…

A

FSH from pituitary which is produced by LH which is produced by GnRh from hypothalamus

20
Q

we use reproductive hormones…

A

to time ovulation/ estrus.
Give GnRH/LH (Desorlein/Cystorelin) –> Give Progesterone (CIDR)
Give Prostaglandin F2alpha (PGF2A;
Estrumate/Luteolyse) –> Cause Ovulation & CL formation
Delay ovulation (mimic CL/Pregnancy) –> Regress CL early, shorten cycle

21
Q

natural vs shorten cycles

A

21 days or 10 days

22
Q

tech for females

A

allows them to have as much offspring as males do, but it costs more to produce oocyte then sperm

23
Q

super ovulation

A

to increase the number of follicles, increased from 1 calf/year to 50+

24
Q

larger sex chromosomes…

A

have more DNA

25
Q

production of sexed semen

A

orting performed under high pressure
 Rate = 8K-40K live sperm of each sex/second!!!!!!!!
 Pod of Genesis III machines = 500 million cells/hour
 To obtain 6 million sperm (1 dose of semen for 1 cow) at 10,000
sperm/sec requires a 10-min wait (600,000 sperm/min)!!!!
 Sorting efficiency is not necessarily complimentary
 Sorting efficiency is ~10/11% for each sex,
 e.g., if 100 sperm were started thru a sort, 22 sperm would survive, 11 X and 11 Y
 90% Accuracy X-bearing Spermatozoa
 Mostly cattle but also sheep, goats, some horses and deer. Still working
on swine

26
Q

traditional vs sexed seman

A

traditional life span is 6.5-7 years, with sexed seman every bull as a likelihood of producing a superior offspring

27
Q

repro history ad physical exam

A

age, body deposition, disease, observed interactions, location of testes, epididymis location, scrotal cicumfrance, penis and prepuce

28
Q

undefended testes

A

cryptorchid, in bulls testes should be symmetrical in size smooth, resilient, and freely moveable in scrotum

29
Q

epididymis

A

should be in proper location for species and free of masses

animal science fall 23 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions