2010, Vol. 5 No. 1, Article 54
Characterizations of Chestnut in Relation to Age, Height and Body Weight in Equines
Gholam Ali Kojouri1*, Mohammad Shadkhast2, Bijan Ziaiie3, and Camellia Taghadosi3
1Associate Professor, Department of Clinical Science
*Corresponding Author; e-mail address: firstname.lastname@example.org
A study was carried out on 100 horses of Thoroughbred (20), Arabian (20) and Akhal-Teke breeds (60) to determine chestnut dimensions and its relation with age of horse and length of respective limbs. Results showed that the means of forelimb chestnut length (2.604±0.601 cm) and width (1.617±0.41 cm) were significantly more (P<0.01) than hind limb chestnut length (2.202±0.627 cm) and width (1.313±0.388 cm). In Thoroughbreds hind limb length was significantly more than that of Arabian and Akhal-Teke breeds and in Arabian breeds it was more than Akhal-Teke (P<0.05). The length of fore limb in Akhal-Teke breed was significantly less than that of Arabian breed (P<0.014). The length of chestnut increased (r= +0.829, Pvalue= 0.021) and and width decrease (r= -0.724, Pvalue= 0.043) with aging in Arabian and Thoroughbred horses, the chestnut dimensions varied with the age, body weight and length of respective limbs in horses.
Chestnut, Equine, Arabian breed, Akhal-Teke breed, Thoroughbred.
Chestnut (Torus carpus, Torus tarsseus) is a keratinized process with a thick end containing keratinized membrane and corium. This process originates from hypodermal glands without any sweat/sebum glands and appears like a frog in histological resection (Nickle et al. 1986; Sisson and Grossman 1997; Raymond and Ashdown 1996). The equine chestnuts may be of oval shape with round ends in forelimbs to irregular shape with sharp ends in hind limbs (Nickle et al. 1986) and are bigger in horses with heavier body weight (Vega et al. 1997 ). Principally, chestnuts in forelimbs are longer than those of hind limbs, chestnut in onager, donkey and mule is a highly pigmented area that has a round shape with smooth and soft surface (Sisson and Grossman 1997). Merge information is available about the shape and characterization of hind and fore limb chestnut of the Thoroughbred, Arabian and Akhal-Teke) breeds of horses, The present study was therefore under taken to determine the dimension and shape of chest nut and its relation to the length of hind and fore limbs, age and body weight in these equine breeds.
MATERIALS AND METHODS
The study was carried out on 100 pure breed horses comprising, of Thoroughbred (20), Arabian (20) and Akhal-Teke breeds (60), aged (7.84±3.32) years, weighing( 623.6±471.7) Kgs to determine the shape and dimensions of chestnut in fore and hind limbs with relation to, age body weight and length of respective limbs of the horse. The distances from shoulder joint and tuber ischium to the ground level was taken as the length of fore limb and hind limb respectively. After hoof trimming, all four limb chestnuts were molded using special human dentistry powder (Albejinat Beyer®) One teaspoon of the powder was mixed with 50 ml water and after one minute, the paste was spread over a plastic ribbon. The ribbon was applied on the chestnut to mould within 5 minutes. After separating the ribbon, length, width, and depth of each chestnut mould was recorded with caliper., taking two dimensional views from the surface and depth of the moulds by using 3dmax computer programme Results were analyzed by Sigmastat (2nd version) program, using One Way Analysis of Variance (ANOVA) and Pearson Correlation at the level of P<0.05.
RESULTS and discussion
The shape of equine chestnut was highly variable, from oval to circular oval, amygdalate, gyrate, bean shape and in some cases indistinguishable.( table 1 and figures 1 to 4). The correlation between the chestnut size and length of respective limbs, age and body weight of horses is indicated at table 2 & 3.
Table 1: chestnut shape in different breeds of horses
Figure 1: Circular oval shape chestnut mold (Right front of Arabian breed)
Figure 2: Bean shape chestnut mold (Left front of Thoroughbred horse)
Figure 3: Elongated oval shape chestnut mold (Right front of Thoroughbred horse)
Figure 4: Indistinguishable shape chestnut mold (Left hind of Thoroughbred horse)
Table 2: Results of performing ANOVA test
on chestnut and other parameters data's in three different breed of
Table 3: Results of performing Pearson
correlation test on chestnut and other parameters data in three
different breed of horses
Copyright © Vet Scan 2005-
powered by eMedia Services