Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú yđề tài: A 15-year survey of reproductive efficiency of Standardbred and Finnhorse trotters in Finland descriptive results. | Katila et al. Acta VeterinariaScandinavica 2010 52 40 http content 52 1 40 AVS ACTAVETERINARIA Scatand n SCANDINAVICA RESEARCH Open Access A 15 -year survey of reproductive efficiency of Standardbred and Finnhorse trotters in Finland -descriptive results Terttu Katila 1 Tiina Reilas2 Kaisa Nivola3 Terttu Peltonen4 and Anna-Maija Virtala5 Abstract Background The major horse breeds in Finland are the Finnhorse FH and the American Standardbred SB . The foaling rates of the FH have consistently been lower than those of the SB. During the last years a decreasing trend in foaling rates of both breeds has been observed. The purpose of this study was to describe and compare the structure of these two mare populations for age reproductive history and mating type. In addition changes over the years were studied that could explain the decline in foaling rates. Methods In Finland the mating statistics and foaling rates per stallion are published yearly by Suomen Hippos which is the Finnish trotting and breeding association authorized by the EU. The studied material was the electronic breeding data of Suomen Hippos in 1991-2005 which contained 69 180 cases one mare bred in one year with one stallion 20 168 mares 2 230 stallions and 5 397 stud managers. The effect of mare age and type mating type and changes during the study period were examined separately for FH and SB using SAS for descriptive statistical analyses frequencies percentages means standard deviations and confidence intervals . The outcome of the last mating per season foal or not was used in the calculation of the foaling rates. Results The FH mares were on average one year older and belonged to the older age groups more often than the SB mares. Ageing decreased foaling rates and even more in FH the foaling rates were the following young FH and SB middle-aged FH and SB ageing FH and SB and very old FH and SB . The foaled mares were more frequent in .
