SDL - Somatotropin use

what is Bovine somatotropin?

• Growth hormone to enhance milk production and growth by altering physiological mechanisms

• used in united ststes and south ameica illeagsl in the uk and the eu

How have diary cows increased their production

At first, this has been increased naturally through natural mangement and nutrition.

As being provided with the hormone reduces the amount of maintenance energy the cow eequires And lowers the amount of food the cow needs to ear..

What is the most commonly used rBST product/..

• increases milk production - will require more feed

• Injected at 9-10 weeks..

• particularly beneficial for older cows

• MAY cause risk of udder oedema, decreases pregnancy rates, may also increase mastitis risk…

What is the purpose nutrient increase in the milk…

• Increases protein production

• need more nutirents,

• energy going into milk as opposed to producing the grwoth hormone…

Why might these cows end up hotter

more growth hormone there, increased somatotropin, therefore more metabolic processes and more heat release

What does somatorropin do

• can increase the risk of clinical mastitis

• can increase the risk for them to concieve

• pregnancy decreases, no affect on gestation levels, but may ne more twins..

• Also increase in culling from cows which had had previous pregnancies

lactogenesis

dtart milk production

galactopoiesis

maintianing milk production (stimulated by prolactin)

What does oestrogen stimulate in terms of lmilke produced

stimulates the release of prolactin

• anterior pituatiory gland

• increases number of prolactin receptors

• 
  

When is there a surge in prolactin

pre partuations

What plays a role in partuition

• glucocorticoids eg cortisol helps lactogenejs

• increase in rer

• increases secretion of a lactabumin and b casin (milk components)

What is the hormones involved in gLa topoisus

• thyroid hornones ensure mammary glands are a high priority

• reduces thyroxine into t3 prolactin AND T3 are both important for this

• suckling will stimulate galactopoeisus, if milk is NOT removed theb there is a down regularion of milk synthesis

What is gh role is galactopoiesis

• partition of additionafk nutrients i. manmary cells

• aynthesis of lactiswglucose taken into adipose tissue a d conveted to dat

• somatopeibwb inhibits lipogebesjs and instead activate sHSL WHIC MOBILISES FTYY ACIDS to adipose and good

At what point do posikax eeccomand giving the hormone - lactogenejss and galactopoiess?

• 9-10 weeks

• no lactogenejs affects

• prolonged lactopoiesss and encourages nutrients fo mammary glands

Overall should bst be hsed?

• increases risk of disease

• may cause nutritional deficienxies

• decreases bse

• but NOT harmful to himans but the milk produced are the same..