About this book Introduction These notes are intended to help undergraduates who need to understand something of behavior both for its intrinsic interest and for their future careers in medicine, biology, psychology, anthropology, veterinary medicine, and nursing. In Emory University's Biology Department, a single-semester course called Evolutionary Perspectives on Behavior is given to undergraduates. It amounts to four, not eight months of study, so a great deal of compression is essential. There are several excellent textbooks available that deal with behavioral science from different perspectives, but we have found them too compendious for use in a short course when students are so heavily burdened; it is unsatisfactory to direct them to a chapter here and there in several different books or to this or that review article and original paper.
Validating the assessment of bull sperm morphology by veterinary practitioners
Janaina T Carreira: This article has been cited by other articles in PMC. Abstract Background Proximal cytoplasmic droplets PCDs , a remnant of germ cell cytoplasm, are common non-specific morphological defects in bovine semen. This study evaluated the effect of higher percentages of PCDs on the quality of frozen-thawed bovine semen, embryo production and early embryo development.
Jacob Thundathil; e-mail: Abstract The objective of this study was to validate the assessment of bull sperm morphology done by veterinary practitioners. Out of bulls, The importance of sperm morphology has been well-documented 1 — 4. Although BBSE is a common procedure in veterinary practice, the reliability of the assessment of sperm morphology has not been evaluated.
Glossary Sperm Morphology An important part of any breeding soundness exam is an evaluation of sperm morphology. In the most fundamental case, the size and shape of the head, midpiece and tail are examined. Additional information can be gained by evaluating integrity of the acrosome and sperm membranes. Sperm from different species vary in size and shape. Bull and human sperm, for example, have paddle-shaped heads, rodent sperm have hook-shaped heads, and the heads of chicken sperm are spindle-shaped and almost difficult to distinguish from the midpiece.