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Rey Torres, Juan Carlos, 2016. Plasma insulin concentrations in Icelandic Horses, individual variations and effects of management practices. Second cycle, A2E. Uppsala: SLU, Dept. of Animal Nutrition and Management (until 231231)



The aim of the present study was to describe pre-exercise basal plasma insulin variation levels in a group of Icelandic horses considered to be healthy on Iceland. A second aim was to investigate possible correlations between basal plasma insulin levels and individual factors like sex, age, body weight, body condition score (BCS), height and management practices such level of training, travel time before competition, forage and concentrate consumption. Data from 201 horses were collected (4-11 years) 129 mares and 72 stallions. BCS was assessed using a 5 degree scale. A venous blood sample was taken before exercise. Plasma insulin levels were analysed in duplicates by ELISA (Mercodia AB, Sweden) and between samples variation was < 10 %. ANOVA (mixed model) was used and effects considered significant at P < 0.05. Plasma insulin levels ranged from 0.01 to 0.60 μg/L. Concentrate allowance and BCS had a significant effect on the plasma insulin level. BCS ranged from 2.3 to 4.0 (approximately 4 to 7 on a 9-degree scale) and concentrate allowance from 0 to 4 kg. For one degree of increase in BCS, log-insulin increased with 0.45 μg/L and for every kilo of increase in the concentrate allowance, log-insulin increased with 0.26 μg/L. However, there were large variations in the insulinemic response to changes in BCS and concentrate allowance as reflected in low determination coefficients in the regression equations. Thus, this study shows that there may be other factors in addition to BCS and concentrate allowance that will determine the response in basal plasma insulin concentrations in young, fit and healthy Icelandic horses.

Main title:Plasma insulin concentrations in Icelandic Horses, individual variations and effects of management practices
Authors:Rey Torres, Juan Carlos
Supervisor:Jansson, Anna
Examiner:Lindberg, Jan Erik
Series:Examensarbete / Sveriges lantbruksuniversitet, Institutionen för husdjurens utfodring och vård
Volume/Sequential designation:549
Year of Publication:2016
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:VM003 Animal Science - Master's Programme 120 HEC
Supervising department:(VH) > Dept. of Animal Nutrition and Management (until 231231)
Keywords:insulin, pre-exercise, BCS, concentrate
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:Animal husbandry
Animal feeding
Animal physiology - Nutrition
Deposited On:28 Jan 2016 14:43
Metadata Last Modified:28 Jan 2016 14:43

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