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UFIR IFAS



Improving Cow Fertility Through Fish Meal Supplementation
http://edis.ifas.ufl.edu/ ( Publisher's URL )
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Permanent Link: http://ufdc.ufl.edu/IR00001649/00001
 Material Information
Title: Improving Cow Fertility Through Fish Meal Supplementation
Physical Description: Fact Sheet
Creator: Staples, Charles R.
Publisher: University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication: Gainesville, Fla.
Publication Date: 2005
 Notes
Acquisition: Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status: Published
General Note: "Original publication date February 7, 2002. Revised July 19, 2005."
General Note: "DS-95"
 Record Information
Source Institution: University of Florida Institutional Repository
Holding Location: University of Florida
Rights Management: All rights reserved by the submitter.
System ID: IR00001649:00001

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DS-95 Improving Cow Fertility Through Fish Meal Supplementation1 Charles R. Staples, Richardo Mattos, Carlos S. Risco and William W. Thatcher 2 The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Larry Arrington, Dean Introduction

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Improving Cow Fertility Through Fish Meal Supplementation 2 Fat Sources Effects of Feeding Fish Meal on Reproduction of Lactating Dairy Cows Figure 1. Improvements in conception or pregnancy rates when fish meal was fed to lactating Holstein cows in five separate experiments.

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Improving Cow Fertility Through Fish Meal Supplementation 3 How Fish Meal May Work To Improve Fertility Figure 2. Full regression of the corpus luteum (defined as less than 1 nanogram of progesterone per milliliter of blood plasma) at 48 hours after an injection of PGF2-alpha occurred in fewer lactating dairy cows fed menhaden fish meal at a Florida dairy farm. Twenty-four out of 25 cows (96%) fed a 0% fish meal diet (white box) regressed their corpus luteum normally compared with 22 out of 31 (71%) cows fed a diet of 2.8% menhaden fish meal (black box).

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Improving Cow Fertility Through Fish Meal Supplementation 4 Figure 3. Potential mechanism by which fish meal may improve fertility of lactating dairy cows. If conception does not occur (left side), the uterus secretes PGF2-alpha at the end of the estrous cycle to regress the corpus luteum (CL) and recruit a new follicle for another ovulation. If conception does occur (right side), PGF2-alpha is not released from the uterus and the CL is maintained on the ovary to produce progesterone to preserve the life of the embryo. Unique fatty acids in fish meal may help suppress synthesis of PGF2-alpha. Summary References