The dimensions of spermatozoa from different levels of the reproductive tract were measured in 6 buffalo-bulls castrated under local anesthesia ; the same measurements were taken in the semen of 6 breeding buffalo-bulls. During transit from caput to cauda epididymis the sperm showed a significant increase in the length of head and main piece. However, a significant decrease was observed in midd...

Skull morphology is fundamental to evolution and the biological adaptation of species to their environments. With aquaculture fish species, head size is also important for economic reasons because it has a direct impact on fillet yield. However, little is known about the underlying genetic basis of head size. Catfish is the primary aquaculture species in the United States. In this study, we per...

Morphometric comparisons of two populations each of Races 1 and 2 of Meloidogyne arenaria from tobacco, peanut, and soybean in different localities in Florida showed no significant differences in any characters measured by light microscopy. Thirteen morphometric characters of females, 22 of males, and 21 of infective second-stage juveniles were measured for each population. The stylet length in...

Objective: The aim of this study was to compare the fetal biometric growth measurements (Head Circumference, Bi-Parietal Diameter, and Femur Length) between male female fetuses on antenatal ultrasound in our population. Methodology: This an observational carried out Department Radiology CMH Malir, Karachi Ziauddin hospital, from July 2016 till 2018 using non-probability sampling technique. A to...

EaStCHEM School of Chemistry, The Unive Edinburgh, EH9 3FJ, UK. E-mail: E.Brec [email protected] UK National Crystallography Service, C Higheld Campus, Southampton, SO17 1BJ Instituto de Ciencia de Materiales de Aragón Departamento de Física de la Materia Cond School of Chemistry, The University of Ma 9PL, UK. E-mail: eric.mcinnes@manchester. Department of Chemistry, University of Cop Copenhagen,...

A new inbred strain, MSKR, originated from Japanese wild mice was established in April, 1998. The MSKR mice were 60% of the C57BL/6N inbred mice in the 60-day body weight. Tail length/head-body length and hind-foot length/head-body length of the MSKR mice were significantly smaller than those of the C57BL/6N mice (0.896 vs 1.061, 0.189 vs 0.204), but ear length/head-body length of the MSKR mice...

Interspecific comparative studies have shown that, in most taxa, postcopulatory sexual selection (PCSS) in the form of sperm competition drives the evolution of longer and faster swimming sperm. Work on passserine birds has revealed that PCSS also reduces variation in sperm size between males at the intraspecific level. However, the influence of PCSS upon intra-male sperm size diversity is poor...

• General sperm shape characterized by conical head • Eggs characterized as large spheres in vitelline membrane • Atlantic and Pacific populations’ spermatozoa show major morphological differences from each other (Landry et al. 2003) • Western Pacific species’ sperm head length measured twice that of Central Pacific (Marks et al. 2008). • Deep sea sperm head length elongated compared to shallow...

The objective of this study was to identify morphological measurements that best distinguish Moroccan Barcha and Atlas goat breeds. Ten measurements (body weight - BW, body length - BL, heart girth - HG, withers height - WH, rump height - WH, back length - BAL, neck length - NL, head length - HL, ear length - EL, and ear width - EW) of 876 adult animals of both sexes (547 Barcha and 329 Atlas) ...