The effect of diet and parasite load on female phonotaxis in the Texas field cricket, Gryllus integer

Female crickets respond selectively to variations in species-specific male calling songs. This selectivity has been shown to be age-dependent; older females are less choosy. However, female quality should also affect female selectivity. The effect of female quality on mate choice was examined in Gryllus integer by comparing the phonotactic responses of females on different diets and with different parasite loads to various synthetic models of conspecific calling song. Test females were virgin, 11-14 days old, and had been maintained on one of five diets varying in protein and fat content. Phonotaxis was quantified using a non-compensating Kugel treadmill which generates vector scores incorporating the speed and direction of movement of each female. Test females were presented with four calling song models which differed in pulse rate, but were still within the natural range of the species for the experimental temperature. After testing, females were dissected and the number of gregarine parasites within the digestive tract counted. There were no significant effects of either diet or parasitism on female motivation to mate although the combined effects of these variables seem to have an effect with no apparent trend. Control females did not discriminate among song types, but there was a trend of female preferences for lower pulse rates which are closest to the mean pulse rate for the species. Heavily parasitized females did not discriminate among pulse rates altho~gh there was a similar trend of high vector scores for low pulse rates. Diet, however, affected selectivity with poorly-fed females showing significantly high vector scores for pulse rates near the species mean. Such findings raise interesting questions about energy allocation and costs and risks of phonotaxis and mate choice in acoustic Orthoptera. These results are discussed in terms of sexual selection and female mate choice.

The effect of gregarine parasite infections, age, and diet on calling song structure and mating behaviour in the Texas field cricket, Gryllus integer

In the past ten years, many researchers have focussed their attention on parasites regarding the role they may play in causing variations in male secondary sexual traits and subsequent effects on female choice. Male age has also been suggested to be an important factor in female choice if old age reflects superior genes. This study investigated the effects that gregarine gut parasites, age, and diet have on the calling and mating behaviour of the male Texas field cricket, Gryllus integer. Male calling songs were recorded in the laboratory using a Digital Signal Processing Network. The song parameters measured were: pulse rate, pulse width, burst duration, pulses per burst, interburst interval, and percent missing pulses. The effects of parasite load and age on the various calling song parameters was investigated in crickets that were fed two different diets varying in nutritional quality. None of the calling song parameters were affected by either parasite load or age in either diet grou p. Courtship behaviour was ob served and recorded using an Eventlog recorder on an IBM computer in the laboratory. Females mated equally with paras(tized and unparasitized males and with old and young males The total duration and proportion of time spent performing each of 9 courtship displays were recorded for males on each diet. Only one display was affected by parasite load. Highly parasitized males fed the nutritionally inferior diet juddered for a proportionately shorter time than males with low parasite loads. Also, older males performed juddering and shaking antennae proportionally longer and juddering and raising wings for longer durations than younger males. Males that successfully mated were observed for performance of 8 post-copulatory guarding behaviour displays. None of the guarding behaviours were affected by parasite load. However, one display was affected by age, with older males performing guard turning for shorter durations than younger males. Results are discuss,ed in terms of the influence of parasites and age on female choice.

An assessment of autism knowledge in the medical field

Once thought to be rare, pervasive developmental disorders (PDDs) are now recognized as the most common neurological disorders affecting children and one of the most common developmental disabilities (DD) in Canada (Autism Society of Canada, 2006). Recent reports indicate that PDDs currently affect 1 in 150 children (Centre for Disease Control and Prevention, 2007). The purpose of this research was to provide an understanding of medical resident and practicing physicians' basic knowledge regarding PDDs. With a population of children with PDDs who present with varying symptoms, the ability for medical professionals to provide general information, diagnosis, appropriate referrals, and medical care can be quite complex. A basic knowledge of the disorder is only a first step in providing adequate medical care to individuals with autism and their families. An updated version of Stone's (1987) Autism survey was administered to medical residents at four medical schools in Canada and currently practicing physicians at three medical schools and one community health network. As well, a group of professionals specializing in the field ofPDDs, participating in research and clinical practice, were surveyed as an 'expert' group to act as a control measure. Expert responses were consistent with current research in the field. General findings indicated few differences in overall knowledge between residents and physicians, with misconceptions evident in areas such as the nature of the disorder, qualitative characteristics of autism, and effective interventions. Results were also examined by specialty and, while pediatricians demonstrated additional accurate 11 knowledge regarding the nature of the disorder and select qualitative impairments, both residents and practicing physicians demonstrated misconceptions about PDDs. This preliminary study replicated the findings of Stone (1987) and Heidgerken (2005) concerning several misconceptions of PDDs held by residents and practicing physicians. Future research should focus on additional replications with validated measures as well as the gathering of qualitative information, in order to inform the medical profession of the need for education in PDDs at training and professional levels.

Gilbert Field House research collection, 1823, 1966, 1968, n.d.

In 1968 the National Historic Sites, Dept. of Indian Affairs and Northern Development undertook to learn more about its recent acquisition, the Gilbert Field House. The house is located in Niagara-on-the-Lake, Ont. along the Niagara Parkway, on what was part of the original land grant to Gilbert Field, a United Empire Loyalist. The house and contents were severely damaged during the War of 1812. After the war Gilbert’s widow, Eleanor, submitted claims for war losses.

Field effectiveness of stimulus equivalence for teaching reading skills to children with autism

Stimulus equivalence involves teaching two conditional discriminations that share one stimulus in common and testing all possible conditional discriminations not taught (Saunders & Green, 1999). Despite considerable research in the laboratory, applied studies of stimulus equivalence have been limited (Vause, Martin, Marion, & Sakko, 2005). This study investigated the field-effectiveness of stimulus equivalence in teaching reading skills to children with Autism. Participants were four children with Autism receiving centre-based intensive behavioural intervention (lBI) treatment. Three of the participants, who already matched pictures to their dictated names, demonstrated six to eight more emergent performances after being taught only to match written words to the same names. One participant struggled with the demands of the study and his participation was discontinued. Results suggest that stimulus equivalence provided an effective and efficient teaching strategy for three of the four participants in this study.

Chapman Stadium athletics field, Chapman University, Orange, California

Chapman Stadium shortly before demolition, Chapman University, Orange, California, 2005. This stadium was originally constructed in 1934 by Orange Union High School, Orange, California. Ownership transferred to Chapman College in 1954. It was re-named in 2

Old Chapman Stadium bleachers and field, Chapman University, Orange, California

Chapman Stadium shortly before demolition, Chapman University, Orange, California, 2005. This stadium was originally constructed in 1934 by Orange Union High School, Orange, California. Ownership transferred to Chapman College in 1954. It was re-named in 2

Exploring Perceptions of Accessibility, Necessity and Use of Social Support for Wilderness Therapy Field Instructors

Organizations offering therapeutic wilderness programming have a responsibility to ensure the well-being of their front line employees. A system of social support that is formed through communication with others, either personally or professionally, can assist field instructors in effectively managing the demands arising from their work. Phenomenological analysis of semi-structured interview transcripts from seven participants provided insight on perceptions of necessity, accessibility and use of social support. Fourteen main themes and thirteen subthemes emerged from the data. Findings are presented using the six components of Parsons’ (1980) staff development model and strongly suggest program managers consider and apply specific measures aimed at increasing the social support for front line field instructors in a wilderness therapy work context.

Photograph - Miss Mabel Field

A photograph of Miss Mabel Field taken by A.L. Lehnkering, no. 158 East Main St., Rochester, New York.

Photograph - Mr. William Field

A photograph of Mr. William Field, photographed by A.L. Lehnkering, no. 158 East Main St., Rochester, New York. The photograph reads "conductor" on back.

Photograph - Mary E. Field

A photograph of Mary E. Field. The rear of the photo reads "Dear Cousin Ester, I send you this photo which is somewhat soiled but is the only one I have at present. Some other time I will send you a better. Yours with Love Mary E. Field".

First Field Artillery Brigade Observer, 22 June 1918

An issue of the First Field Artillery Brigade Observer, 22 June 1918, no.5. The report describes several raids, including "the Austrians, under orders from the Kaiser and with the object of putting new enthusiasm into their disheartened people, launched a big offensive, which the Italians have handled to date masterfully."

First Field Artillery Brigade Observer, 1 July 1918

The report mentions that General Pershing presented Distinguished Service Crosses to soldiers in the First Field Artillery Brigade. It also describes a Sergeant and 3 men finding an enemy soldier asleep with a machine gun. They brought him back to the American lines. Also included is a list of destruction that took place over the the last three days.

Illustration from the First Field Artillery Brigade Observer

A cartoon by Alban B. Butler (signed), titled "National Salute" and dated 4 July 1918. The illustration shows officers loading a canon and firing.

Associate-Candidate Relationships: A Study of Teacher Education Field Experiences

Past research has identified the importance of the relationship between teacher candidates and their associate teachers during field experiences. Through the research questions that framed the study, I sought to contribute to a growing understanding of how the associate teacher-teacher candidate relationship develops from the perspective of teacher candidates. Using an interpretive lens, I explored the associate teacher-teacher candidate relationships of 5 teacher candidates at a mid-sized university in Southern Ontario. In this instrumental multicase study, the 5 participants described 13 pairs of relationships with associate teachers who modeled varying practices. The qualitative data surrounding these case relationships were collected through a focus group and semistructured interviews. Participants’ responses were analyzed using axial coding and constant comparative analysis. Participants identified feedback, guidance, support, genuine interactions, and relationship dynamics as central to successful field experiences. Participants also suggested that associate teachers might be better supported in their role if they were offered increased professional development from the faculties of education that organize the field experiences. The findings documented offer a fresh perspective of the role of the associate teacher in successful teacher education programs, particularly as experienced by the 5 participants.