Theriogenology2014; 81(9); 1214-1222; doi: 10.1016/j.theriogenology.2014.01.042

Effects of body condition and leptin on the reproductive performance of Lusitano mares on extensive systems.

Abstract: The aim of this study was to investigate the effects of body condition (BC), BC changes, and plasma leptin concentrations on the reproductive performance of Lusitano broodmares on extensive systems. Data from 119 mares (ranging from 4 to 22 years of age) were collected over a period of four consecutive breeding seasons. Each case was considered as one foaled mare bred in 1 year. Body condition changes at conception (ΔBCScon) showed a strong effect on fertility at the first two postpartum estrous cycles and a significant interaction with body condition score at conception (BCScon) was observed (P < 0.01). The best fertility results were obtained with positive and greater ΔBCScon. The best predictive value of fertility (91%) was achieved when the BCScon was 3.0 and ΔBCScon was 0.375. Global foaling rate for the 4-year period was 74.5%. Mean foaling interval and gestation length were, respectively, 368.0 ± 2.8 and 340.3 ± 1.0 days. Gestation length was influenced by the month of foaling (P < 0.05) and decreased as mares got older (P < 0.01). The number of estimated estrous cycles per live foal was 1.78 ± 0.12, including foal heat ovulation. Leptin was correlated with BCS (0.41; P < 0.001), but in the present study, plasma leptin concentrations on late gestation and early lactation did not influence fertility results. At 90 days of age, lower growth performances were obtained in foals which dams presented negative BCS changes on the first 3 months of lactation (P < 0.05). In conclusion, BC changes at early postpartum period influence the reproductive efficiency of broodmares and the growth of their suckling foals. These findings are important to help breeders on management options concerning feeding strategies in the Lusitano production systems and others under similar conditions.
Publication Date: 2014-02-08 PubMed ID: 24613603DOI: 10.1016/j.theriogenology.2014.01.042Google Scholar: Lookup
The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research study explores how the body condition, body condition changes, and the plasma leptin concentrations of Lusitano broodmares affect their reproductive performance. It was discovered that changes in body condition at the time of conception had a significant effect on fertility and that the growth of offspring was affected by the mothers’ body condition changes during early lactation.

Objective of the Study

The primary objective of this research was to examine how a Lusitano mare’s body condition, the changes in the body condition, and the levels of plasma leptin in their system affected their ability to reproduce successfully within extensive systems. This included understanding how these factors influenced the mares’ overall fertility, the intermission time between births, the duration of gestation, and the growth performance of their offspring.

Methodology

  • The researchers gathered data from 119 mares, whose ages ranged from 4 to 22 years, across four consecutive breeding seasons.
  • Each case represented one mare that had given birth and bred within a single year.
  • The team looked at changes in body condition at the time of conception (ΔBCScon) and how it correlates with the body condition score at conception (BCScon).
  • Additionally, they also examined the plasma leptin concentrations in the mares during late gestation and early lactation.
  • Another area of focus was how the ΔBCScon influenced the growth performances of the foals when they reached 90 days of age.

Findings

  • The researchers noted that changes in body condition at the time of conception significantly affected fertility during the first two postpartum estrous cycles.
  • The best fertility was observed when there were positive and greater ΔBCScon, with a predictive value of 91% when BCScon was at 3.0 and ΔBCScon at 0.375.
  • The overall foaling rate for the four-year period was 74.5%.
  • The average length of gestation decreased as the mares aged and was also impacted by the month of foaling. Furthermore, the number of estimated estrous cycles per live foal was approximately 1.78.
  • Leptin was found to have a significant correlation with the body condition score. However, the concentration of plasma leptin during the latter stages of pregnancy and early lactation did not have any influence on fertility.
  • Deterioration in the body condition score of the mothers during the initial three months of lactation affected the growth performances of the foals negatively.

Conclusions

The study concluded that alterations in the body condition of broodmares during the early postpartum period significantly influence their reproductive efficiency, as well as the growth of their offspring. These findings provide valuable insights to breeders and can impact feeding and management strategies for Lusitano mares and similar breeds.

Cite This Article

APA
Fradinho MJ, Correia MJ, Gru00e1cio V, Bliebernicht M, Farrim A, Mateus L, Martin-Rosset W, Bessa RJ, Caldeira RM, Ferreira-Dias G. (2014). Effects of body condition and leptin on the reproductive performance of Lusitano mares on extensive systems. Theriogenology, 81(9), 1214-1222. https://doi.org/10.1016/j.theriogenology.2014.01.042

Publication

ISSN: 1879-3231
NlmUniqueID: 0421510
Country: United States
Language: English
Volume: 81
Issue: 9
Pages: 1214-1222
PII: S0093-691X(14)00078-8

Researcher Affiliations

Fradinho, M J
  • CIISA, Faculdade de Medicina Veterinu00e1ria, Universidade de Lisboa, Av. Universidade Tu00e9cnica, Lisboa, Portugal.
Correia, M J
  • Coudelaria de Alter, Tapada do Arneiro, Alter-do-Chu00e3o, Portugal.
Gru00e1cio, V
  • Coudelaria de Alter, Tapada do Arneiro, Alter-do-Chu00e3o, Portugal.
Bliebernicht, M
  • Qta. da Lagoalva de Cima, Alpiaru00e7a, Portugal.
Farrim, A
  • Companhia das Lezu00edrias, Porto Alto, Portugal.
Mateus, L
  • CIISA, Faculdade de Medicina Veterinu00e1ria, Universidade de Lisboa, Av. Universidade Tu00e9cnica, Lisboa, Portugal.
Martin-Rosset, W
  • INRA, Centre de Recherche de Clermont-Ferrand/Theix, Saint Genes Champanelle, France.
Bessa, R J B
  • CIISA, Faculdade de Medicina Veterinu00e1ria, Universidade de Lisboa, Av. Universidade Tu00e9cnica, Lisboa, Portugal.
Caldeira, R M
  • CIISA, Faculdade de Medicina Veterinu00e1ria, Universidade de Lisboa, Av. Universidade Tu00e9cnica, Lisboa, Portugal.
Ferreira-Dias, G
  • CIISA, Faculdade de Medicina Veterinu00e1ria, Universidade de Lisboa, Av. Universidade Tu00e9cnica, Lisboa, Portugal. Electronic address: gmlfdias@fmv.ulisboa.pt.

MeSH Terms

  • Animal Husbandry / methods
  • Animals
  • Body Composition
  • Female
  • Fertility
  • Horses / physiology
  • Leptin / blood
  • Pregnancy
  • Pregnancy, Animal
  • Time Factors

Citations

This article has been cited 5 times.
  1. Hallman I, Karikoski N, Kareskoski M. The effects of obesity and insulin dysregulation on mare reproduction, pregnancy, and foal health: a review.. Front Vet Sci 2023;10:1180622.
    doi: 10.3389/fvets.2023.1180622pubmed: 37152686google scholar: lookup
  2. Cooper CJ, Arroyo LG, Pearl DL, Hewson J, Lillie BN. Survey of the equine broodmare industry, abortion, and equine herpesvirus-1 vaccination in Ontario.. Can Vet J 2021 Feb;62(2):124-132.
    pubmed: 33542550
  3. Dorado J, Bottrel M, Ortiz I, Du00edaz-Jimu00e9nez M, Pereira B, Consuegra C, Carrasco JJ, Gu00f3mez-Arrones V, Domingo A, Hidalgo M. Factors Affecting Embryo Recovery Rate, Quality, and Diameter in Andalusian Donkey Jennies.. Animals (Basel) 2020 Oct 26;10(11).
    doi: 10.3390/ani10111967pubmed: 33114673google scholar: lookup
  4. Hong SM, Chung EC, Kim CH. Anti-obesity Effect of Fermented Whey Beverage using Lactic Acid Bacteria in Diet-induced Obese Rats.. Korean J Food Sci Anim Resour 2015;35(5):653-9.
    doi: 10.5851/kosfa.2015.35.5.653pubmed: 26761894google scholar: lookup
  5. Galvu00e3o A, Tramontano A, Rebordu00e3o MR, Amaral A, Bravo PP, Szu00f3stek A, Skarzynski D, Mollo A, Ferreira-Dias G. Opposing roles of leptin and ghrelin in the equine corpus luteum regulation: an in vitro study.. Mediators Inflamm 2014;2014:682193.
    doi: 10.1155/2014/682193pubmed: 25125800google scholar: lookup