Comparison of the Hemacytological Constitution of Male and Female Rabbits

Abstract

Previous reports from this laboratory on the hemacytological constitution of the rabbit have been limited to observations on male animals. These studies have now been extended to normal females and to females presenting various defects referable to constitutional (hereditary) or environmental influences. It is the purpose of the present paper to present one aspect of these studies; namely, a comparison of the blood cytology of normal male and female litter mates. These comparisons were made in order to determine whether there were statistically significant differences between values obtained for any of the blood cells of the two sexes. Furthermore, correlation coefficients were calculated with the purpose of disclosing to what extent a knowledge of the blood cytology of a buck was relevant information concerning the blood cytology of a litter mate sister. Material and MethodsObservations were made on the blood cytology of 41 pairs of normal rabbits, each pair consisting of a buck and a doe of the same litter; an analysis of these observations forms the basis of the present report.Animal Materiat.--All animals were bred and raised in this laboratory, and all were bred in pure line from standard stock with the exception of three pairs of Rexes. These were obtained by a back-cross mating of an F1 Rex to a pure line Rex parent and were of normal Rex type. The breeds and the number of animals in each breed were as follows: Havana 7; Dutch and Rex 6; Himalayan and Beveren 4; English, Chinchilla, and Belgian 3; Polish and Silver 2; Tan 1. All the rabbits were virgin stock and gave no evidence of disease as determined by careful clinical examination. The age ranged from a minimum of 16.0 weeks to a maximum of 37.8 weeks, with a mean value of 26.0 4-0.59 weeks.Housing and Feeding.--The buck and doe comprising a pair were weaned at

The Concentration of Haemoglobin in the Blood of Young Adult Men and Women: the Effect of Administering Small Doses of Iron for Prolonged Periods

“…Wintrobe, Shumacker & Schmidt (1935-6) carefully studied the blood of considerable numbers of dogs, rabbits and rats. Though they found that there was a greater concentration of haemoglobin in the blood of dogs than in the blood of bitches, they did not confirm the claims of Rosahn et al (1934) that buck rabbits had a greater concentration of haemoglobin in their blood than had doe rabbits. The mean concentration of haemoglobin in the blood of female rats was slightly greater than that in the blood of male rats.…”

“…Readings on a few wild birds, however, were higher and then the effect of sex was not obvious. Rosahn, Pearce & Hu (1934) found that buck rabbits had a significantly greater concentration of haemoglobin in their blood than had virgin doe rabbits of the same litter. Vaulont (1935) found that the mean haemoglobin concentration in the blood of ten female cats was 12.56 g/Ioo ml., whereas that in the blood of ten tom cats was 13-07 g/Ioo ml.…”

The Hemocytological Constitution of Adult Male Rabbits From Fifteen Standard Breeds

“…This study on blood cytology has been extended in various directions and the influence of such factors as disease (5), breed (6), sex (7), age, certain physiological states, and diet has been investigated. The present paper is the report of observations made on laboratory bred strains of standard varieties of rabbits.…”

Haematological studies on two rodents after zinc phosphide and vacor poisoning

“…Likewise male gerbils also had higher RBC and haemoglobin but shorter bleeding time (tables 2 and 3). Simi!.ar sex differences in blood parameters has been reported for other mammals (Rosalin et al 1934;Winthrobe 1933;Anderson and Gee 1958;Arafa et al 1974;Rahaman et al 1975). However both Sealander (1964), WiUiamson and Pelton (1976) failed to observe sex-dependent variations for RBC, WBC, packed cell volume (PCV), haemoglobin and platelets in several small mammals and European wild hogs respectively.…”