The use of nutritional supplementation to improve responses to the 'ram effect' in Merino ewes

Phillip Clemens Khaiseb

doi:10.4225/23/5a56ca07ef27a

The use of nutritional supplementation to improve responses to the 'ram effect' in Merino ewes

Phillip Clemens Khaiseb

Research output: Thesis › Master's Thesis

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Abstract

In the development of 'clean, green and ethical' systems for sheep management, we can reduce our dependence on hormones
for controlling reproduction by using pheromones from novel rams to induce ovulation (the 'ram effect'). With a view to improving the efficiency of the 'ram effect', we tested whether nutritional supplementation of the ewes would improve their responses. Supplementation did not increase the proportion of the ewe flock that ovulated or showed normal cycles. However, there was an increase In the frequency of multiple ovulations when supplementation was sustained well into the preovulatory stage of the ram induced oestrous cycle.

Original language	English
Qualification	Masters
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Martin, Graeme, Supervisor Hawken, Penelope Alison, Supervisor
Award date	30 Nov 2017
DOIs	https://doi.org/10.4225/23/5a56ca07ef27a
Publication status	Unpublished - 2016

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10.4225/23/5a56ca07ef27a

THESIS - MASTER BY RESEARCH - KHAISEB Phillip Chemens - 2017
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Cite this

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title = "The use of nutritional supplementation to improve responses to the 'ram effect' in Merino ewes",

abstract = "In the development of 'clean, green and ethical' systems for sheep management, we can reduce our dependence on hormonesfor controlling reproduction by using pheromones from novel rams to induce ovulation (the 'ram effect'). With a view to improving the efficiency of the 'ram effect', we tested whether nutritional supplementation of the ewes would improve their responses. Supplementation did not increase the proportion of the ewe flock that ovulated or showed normal cycles. However, there was an increase In the frequency of multiple ovulations when supplementation was sustained well into the preovulatory stage of the ram induced oestrous cycle.",

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AB - In the development of 'clean, green and ethical' systems for sheep management, we can reduce our dependence on hormonesfor controlling reproduction by using pheromones from novel rams to induce ovulation (the 'ram effect'). With a view to improving the efficiency of the 'ram effect', we tested whether nutritional supplementation of the ewes would improve their responses. Supplementation did not increase the proportion of the ewe flock that ovulated or showed normal cycles. However, there was an increase In the frequency of multiple ovulations when supplementation was sustained well into the preovulatory stage of the ram induced oestrous cycle.

KW - reproduction

KW - sheep

KW - male effect

KW - nutrition

U2 - 10.4225/23/5a56ca07ef27a

DO - 10.4225/23/5a56ca07ef27a

M3 - Master's Thesis

ER -

The use of nutritional supplementation to improve responses to the 'ram effect' in Merino ewes

Abstract

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