Animal Structures Commons^™

Descriptive Anatomy Of The Female Reproductive Organs In Thamin Eld’S Deer (Rucervus Eldii Thamin) And Fea’S Muntjac (Muntiacus Feae) With Utilizing Of The Glycerin Impregnation Technique For Specimen Preservation, Paisan Tienthai, Pawana Chuesiri, Itti Boonorrana, Piyaporn Kongmakee, Ampika Thongphakdee

The Thai Journal of Veterinary Medicine

The reproductive anatomy of rare cervid species remains insufficiently documented, limiting comparative studies and preservation efforts. This study describes the anatomical details in the female reproductive organs of Thamin Eld’s deer (Rucervus eldii thamin) and Fea’s muntjac (Muntiacus feae), while the application of a modified glycerin impregnation technique was achieved for specimen preservation. Dissections of female reproductive tracts revealed morphological variations that correlate with the known female reproductive characteristics of domestic and closely related species. In both species, the ovaries were characterized as small, ovoid structures, exhibiting prominent follicles or corpora lutea consistent with the stage …

A Geometric Morphometric Analysis Of Acetabular Shape Variation Across Bat Families, Jordan L. Huff

Electronic Theses and Dissertations

Bats are the only mammals capable of powered flight, and research is concentrated on this adaptation. Their non-flight locomotion has received comparatively little attention. Previous studies show that non-flight locomotor behaviors vary across families. Members of Pteropodidae are efficient climbers but cannot effectively walk, whereas Phyllostomidae and Vespertilionidae are better at terrestrial locomotion but show reduced arboreal capabilities. The non-flight locomotion of Hipposideridae and Rhinolophidae is less understood, although rhinolophids exhibit limited terrestrial locomotion. This study examined whether differences in locomotor behavior are associated with variation in acetabular morphology. A geometric morphometric analysis of acetabular shape was conducted across multiple …

Dog Sniffing Biomechanic Responses In An Odor Detection Test Of Odorants With Differing Physical Properties, Lydia Burnett, Nicholas Hebdon, Pete A. Stevens, Monica Moljo, Lindsay D. Waldrop, Lauryn Degreeff

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Dogs are utilized in forensic science for their extensive scent detection capabilities. They are often considered the “gold standard” in field detection for targets such as illicit drugs and explosives. Despite their prevalence in the field, relatively little is known about how dogs interact with and transport volatile organic compounds through their olfactory system. In this study, two groups of dogs were utilized – Sport detection dogs (n=19) that participate in the National Association of Canine Scent Work and have achieved advanced standing through training and successful search competitions and law enforcement explosive detection dogs (n=8) which were included for …

Heritability Of Maxillary Dental Arch Dimensions In A Pedigreed Sample Of Hamadryas Baboons, Samuel Park

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

This thesis presents a study of heritability of maxillary dental arch dimensions in a captive baboon colony. Arch dimensions are important subject because they influence the entirety of the craniofacial and masticatory complex. The goal of this study was to quantify the relative genetic influence on arch dimensions and the nature of this influence at different points along the maxillary arcade. Referencing virtual, three-dimensional dental cast scans, widths were measured at different points between the a) maxillary left and right canines, and b) maxillary left and right first molars (M1). Specifically, measurements were taken at the inner (lingual) gingival margin, …

Validation Of Rotoscoping Method For Two-Marker Bones In The Alligator Forearm, Nina Pitre

Biology Student Scholarship

Nina Pitre ’22
Majors: Biology and Psychology
Faculty Mentor: Dr. David Baier, Biology

XROMM methods "re-animate" 3D skeletal motion of living animals by aligning digital bone models to X-ray videos. Surgically implanted markers permit automatic alignment of bone models if three or more markers are used. However, one of our specimens only had two markers implanted. These bones could be automatically positioned and partially oriented using the two markers, but then required manual alignment to the X-ray images to orient about the axis passing between the two markers. Here, we validated the method by digitally removing a marker from a …

Neuroanatomy Of The Blackspotted Rockskipper, Entomacrodus Striatus, Pooja Dayal

Williams Honors College, Honors Research Projects

Here I characterized the central neuroanatomy of the Blackspotted Rockskipper, Entomacrodus striatus, native to French Polynesia. The neuroanatomy of E. striatus has not been studied prior to this paper. I used several histology and antibody staining techniques to accomplish this, including Crystal Violet, immunohistochemistry, immunofluorescence, and Bielschowsky’s Silver Nitrate staining. This paper describes the most successful techniques used, identifies major structures in the species’ neuroanatomy, and also explains why studying E. striatus is important in the future of vertebrate research.

The Morphology And Evolution Of The Primate Brachial Plexus, Brian M. Shearer

Dissertations, Theses, and Capstone Projects

Primate evolutionary history is inexorably linked to the evolution of a broad array of locomotor adaptations that have facilitated the clade’s invasion of new niches. Researchers studying the evolution of primates and of their individual locomotor adaptations have traditionally relied on bony morphology – a practical choice given the virtual non-existence of any other type of tissue in the fossil record. However, this focus downplays the potential importance of the many other structures involved in locomotion, such as muscle, cartilage, and neural tissue, which may each be influenced by separate selective forces because of their different roles in facilitating movement. …

Rescuing Perishable Neuroanatomical Information From A Threatened Biodiversity Hotspot: Remote Field Methods For Brain Tissue Preservation Validated By Cytoarchitectonic Analysis, Immunohistochemistry, And X-Ray Microcomputed Tomography, Daniel Hughes, Ellen Walker, Paul Gignac, Anais Martinez, Kenichiro Negishi, Carl Lieb, Eli Greenbaum, Arshad Khan

Selected Works Temporary Series

Biodiversity hotspots, which harbor more endemic species than elsewhere on Earth, areincreasingly threatened. There is a need to accelerate collection efforts in these regionsbefore threatened or endangered species become extinct. The diverse geographical, ecological,genetic, morphological, and behavioral data generated from the on-site collection ofan individual specimen are useful for many scientific purposes. However, traditional methodsfor specimen preparation in the field do not permit researchers to retrieve neuroanatomicaldata, disregarding potentially useful data for increasing our understanding of braindiversity. These data have helped clarify brain evolution, deciphered relationships betweenstructure and function, and revealed constraints and selective pressures that provide contextabout the evolution …

Rescuing Perishable Neuroanatomical Information From A Threatened Biodiversity Hotspot: Remote Field Methods For Brain Tissue Preservation Validated By Cytoarchitectonic Analysis, Immunohistochemistry, And X-Ray Microcomputed Tomography, Hughes, Ellen Walker, Paul Gignac, Anais Martinez, Kenichiro Negishi, Carl Lieb, Eli Greenbaum, Arshad Khan

Departmental Papers (Biology)

Biodiversity hotspots, which harbor more endemic species than elsewhere on Earth, areincreasingly threatened. There is a need to accelerate collection efforts in these regionsbefore threatened or endangered species become extinct. The diverse geographical, ecological,genetic, morphological, and behavioral data generated from the on-site collection ofan individual specimen are useful for many scientific purposes. However, traditional methodsfor specimen preparation in the field do not permit researchers to retrieve neuroanatomicaldata, disregarding potentially useful data for increasing our understanding of braindiversity. These data have helped clarify brain evolution, deciphered relationships betweenstructure and function, and revealed constraints and selective pressures that provide contextabout the evolution …

The Development Of Skeletal Muscle In Young Horses: An Ultrasonography And Satellite Cell Approach, Emma K. Lavigne

Honors Scholar Theses

Muscle growth in young horses is characterized by an increase in muscle cross-sectional area, which can be accomplished through the activation and differentiation of satellite cells. Satellite cells can be stimulated or inhibited in response to different cytokines and growth factors and are key mediators of muscle hypertrophy and regeneration. The aim of this study was to investigate the growth of the longissimus dorsi (LD) muscle in horses under 5 years of age and to obtain preliminary data on satellite cell behavior in foals. The area, width, height, and subcutaneous fat were measured using ultrasonography at 6-month increments over the …

Evaluation Of The Gross Anatomy Seasonal Changes Function And Histology Of The Perineal Gland In The Hispid Cotton Rat, Sigmodon Hispidus, Julie Anne Winchell

Biological Sciences Theses & Dissertations

The perinea! gland in the hispid cotton rat, Sigmodon hispidus, is a seasonally cyclic, subcutaneously located organ which is associated with the reproductive system. On gross dissection, the gland possesses a strong attachment to the penis with only loose fascia! connections to the rectum and surrounding muscle and skin. Histologic exam confirms this connection to the reproductive tract and shows the organ to be a compound tubuloacinar gland with a projection leading into the penis. The cyclic hypertrophy and regression of the gland closely parallels that of the testes and seminal vesicles indicating that this cyclicity may be under …

A Study Of Thoracic Skeletomusculature In Peracarida (Crustacea), Donna R. Gill

Masters Theses

Two species of peracarid malacostracans, a mysid, Neomysis americana, and an oniscid isopod, Trachelipus cf. rathkei, were used to study the skeletomusculature system. Serial sections, whole mounts, and gross dissections were made. Coxal promotors and remotors and basal adductors and abductors were the muscle groups examined.

The promotor and remotor muscles of N. americana were found to be numerous, well developed, taking origin primarily from the dorsal thoracic wall, and extending nearly ventrally to insert in the coxa; the adductor muscle and two abductor muscles are weakly developed. The coxa in T. cf. rathkei is incorporated completely …

The Comparative Morphology Of The Female Gonads Of Two Members Of The Nematode Order Tylenchida, Owen G. Coker

Masters Theses

No abstract provided.

Kidney Of The Frog, Felix Taubman

Bachelors’ Theses

The frog has been used exclusively in both high school and college as the main source of experimental biological and zoological studies. Because it is so easily obtained and so finely adapted to our purposes, we chose it as the specimen upon which to do our thesis work. Much has been done experimentally on the kidneys with the frog. The purpose of this thesis is to present a general view of the external and microscopic anatomy of the frog kidney and with this as a groundwork to present the problems of secretion; whether secretion is carried on by the renal …

Chelonian Brain-Membranes, Brain-Bladder, Metapore And Metaplexus, John P. Munson

Biology Faculty Scholarship

The chelonian brain is not too small to be studied macroscopically. It is easily removed from the skull. Minute surface details and the cell structure can be easily observed.