scholarly journals Species and sex divergence in vocalizations between hybridizing role-reversed shorebirds, Northern Jacana (Jacana spinosa) and Wattled Jacana (Jacana jacana)

2019 ◽  
Author(s):  
Evan J. Buck ◽  
Toni Brown ◽  
Gina Zwicky ◽  
Elizabeth P. Derryberry ◽  
Sara E. Lipshutz
Keyword(s):  
Fundamental Frequency ◽  
Sex Role ◽  
Peak Frequency ◽  
Male And Female ◽  
Mate Attraction ◽  
Males And Females ◽  
Species Specific ◽  
Isolating Mechanism

ABSTRACTSpecies-specific vocalizations can act as a reproductive isolating mechanism between closely related populations. We analyzed vocal divergence between two hybridizing species of sex-role reversed polyandrous shorebirds, the Northern Jacana (Jacana spinosa) and Wattled Jacana (Jacana jacana). We found that J. spinosa calls have higher peak frequency and fundamental frequency than J. jacana calls. We also compared calls between males and females, as both jacana species are sex-role reversed and females compete for male mates. Males produce calls with a higher peak frequency, exhibit shorter note lengths and emit a greater number of notes within a calling bout than females, which could relate to mate attraction. These results suggest that vocal divergence could act as a behavioral barrier to limit hybridization between the species and vocalizations may function differently between male and female jacanas.

Comparison of Factors from the Bem Sex-Role Inventory for Male and Female College Students

1980 ◽  
Vol 46 (3) ◽  
pp. 1011-1017 ◽  
Author(s):  
Thomas M. Kimlicka ◽  
James A. Wakefield ◽  
Alan F. Friedman
Keyword(s):  
College Students ◽  
Principal Components ◽  
Sex Role ◽  
Female College Students ◽  
Poor Agreement ◽  
Bem Sex Role Inventory ◽  
Male And Female ◽  
Males And Females ◽  
Principal Components Method ◽  
Components Method

The 40 sex-typed items of the Bern Sex-role Inventory were analyzed by the principal components method for samples of 169 male and 206 female undergraduates. The Bern Sex-role Inventory assumes psychological masculinity (M) and femininity (F) as independent, unipolar dimensions of personality which can be measured using pools of items treated as homogeneous. The two analyses were compared with each other and with theoretical orthogonal factors of masculinity and femininity. The results indicated that the two sets of items measure the same constructs for males and females and show agreement with theoretical factors. In addition, the masculine items defined three small factors (rather than one) for each sex and eight feminine items showed poor agreement with the femininity factor. Suggestions for improving the inventory were presented.

Developmental Aspects of Adolescent Sexuality as Reflected in Reactions to Sexually Explicit Humor

1980 ◽  
Vol 46 (2) ◽  
pp. 543-548 ◽  
Author(s):  
Frank J. Prerost
Keyword(s):  
Sex Role ◽  
Late Adolescence ◽  
Age Group ◽  
Sexual Content ◽  
Male And Female ◽  
Factors Affecting ◽  
Sexually Explicit ◽  
Males And Females ◽  
Middle Adolescence ◽  
Significant Factors

Male and female appreciation of sexual humor was assessed at the stages of early, middle, and late adolescence. 30 males and 30 females from Catholic schools served in each age group. Age, sex of subject, and sexual content explicitness of humor material were significant factors affecting enjoyment of sexual humor. Convergence in the appreciation of sexual humor between males and females occurred in middle adolescence, but dissimilar patterns of appreciation divergence appeared in early and late adolescence. The differential patterns of appreciation evidenced by the males and females of different ages was discussed in terms of the current patterns of sex-role restraints on the expression of sexuality during adolescent years and how these restraints have changed from those in preceding generations.

Attitudes of Male and Female Athletes Toward Male and Female Coaches

1984 ◽  
Vol 6 (4) ◽  
pp. 448-453 ◽  
Author(s):  
Robert Weinberg ◽  
Margie Reveles ◽  
Allen Jackson
Keyword(s):  
High School ◽  
Junior High School ◽  
Female Athletes ◽  
Sex Role ◽  
Background Information ◽  
Basketball Players ◽  
Male And Female ◽  
Sex Role Socialization ◽  
Males And Females ◽  
Female Coaches

This investigation was done to gather some exploratory data concerning the attitudes and feelings of male and female college, high school, and junior high school varsity basketball players toward having a female coach versus a male coach. Subjects (N = 85) indicated their attitudes for playing for a hypothetical male or female coach (randomly assigned to condition) in a 2 x 2 (sex of athlete x sex of coach) between-subjects design. They were instructed to complete a questionnaire consisting of 11 items that tapped their attitudes and feelings toward a new coach. Identical background information was provided to subjects concerning the qualifications of the coach, the only difference being that for one group of subjects the coach was said to be female whereas for the other group of subjects the coach was said to be a male. Results were analyzed by a MANOVA and indicated significant interactions on seven questions, with simple main effects consistently indicating that males displayed more negative attitudes toward female coaches than did females while males and females did not differ in their view of male coaches. Results are discussed in terms of sex-role socialization patterns for males and females.

PERCEPTIONS OF MEN, WOMEN, AND CEOS: THE EFFECTS OF GENDER IDENTITY

2004 ◽  
Vol 32 (2) ◽  
pp. 155-171 ◽  
Author(s):  
Michael Robert Dennis ◽  
Adrianne Dennis Kunkel
Keyword(s):  
Gender Identity ◽  
Chief Executive Officer ◽  
Sex Role ◽  
Chief Executive ◽  
Bem Sex Role Inventory ◽  
Male And Female ◽  
Leadership Attributes ◽  
Males And Females ◽  
Similarities And Differences ◽  
Schein Descriptive Index

Previous studies (e.g., Heilman, Block, & Martell, 1995; Heilman, Block, Martell, & Simon, 1989; Kunkel, Dennis, & Waters, 2003; Schein, 1973, 1975; Schein & Mueller, 1992) have detected differences in how participants perceive the characteristics of males and females in general and those of male and female managers, though sex-based stereotyping dissipated with the consideration of successful managers. This study, an administration of the Schein Descriptive Index (SDI, Schein, 1973) and the Bem Sex Role Inventory (BSRI; Bem, 1974) to 220 participants (125 women and 95 men), is the second to extend the operationalization of the extant program beyond the commonplace label of manager to that of chief executive officer (CEO) and the first to find that participants' gender identities may be critical to their perceptions of similarities and differences between the sexes. While males and masculinity continue to be associated with organizational leadership attributes, individuals of either sex who express feminine orientations perceive little difference between the sexes.

A bio-syringe mechanism and the pattern of genital correspondence in the weevil genus Sitona (Coleoptera: Curculionidae): an approach to the great interest of Sharp and Muir

Zootaxa ◽  
2021 ◽  
Vol 4933 (4) ◽  
pp. 514-526
Author(s):  
MAHMOOD ALICHI
Keyword(s):  
Bursa Copulatrix ◽  
Genital Morphology ◽  
Male And Female ◽  
Male Transfer ◽  
Species Specific ◽  
Thickened Wall ◽  
Isolating Mechanism ◽  
Transfer Apparatus ◽  
Female Genital

The remarkable diversity in male and female genital morphology among the species of Sitona Germar might contribute to the understanding of the structural “lock-and-key” isolating mechanism. Recently, it has been found that in spite of the phallic sizes in male weevils of the genus Sitona, their internal sacs should precisely match with the vaginal infoldings of conspecific females. The present research also deals with the male transfer apparatus, which is a special organ for insemination procedure inside the female bursa copulatrix. A wedge-shaped structure with a fused ejaculatory pump was distinguished as the bio-syringe part of the transfer apparatus in the examined species. Two paired sclerites of the transfer apparatus support the bio-syringe, so that it would slide freely between them and lock precisely over the opening of the spermathecal duct inside the bursa copulatrix of the female. In this phenomenon, several new structures were also found, including a bursal sclerite (“bursal disc”) and a pair of miniature pouches (“bursal plugs”) which are embedded in the thickened wall of the female bursal lumen. These findings explain how the shapes of male and female copulatory organs are normally species-specific and provide an opportunity for understanding the role of the structural lock-and-key isolating mechanism. 

A Tape Striation Counting Method for Determining Fundamental Frequency

1979 ◽  
Vol 10 (4) ◽  
pp. 246-248 ◽  
Author(s):  
Peter B. Mueller ◽  
Marla Adams ◽  
Jean Baehr-Rouse ◽  
Debbie Boos
Keyword(s):  
Fundamental Frequency ◽  
Counting Method ◽  
Male And Female ◽  
Fundamental Frequencies ◽  
Counting Procedure ◽  
Female Subjects

Mean fundamental frequencies of male and female subjects obtained with FLORIDA I and a tape striation counting procedure were compared. The fundamental frequencies obtained with these two methods were similar and it appears that the tape striation counting procedure is a viable, simple, and inexpensive alternative to more costly and complicated procedures and instrumentation.

GONADOTROPHIN PATTERNS IN MALE AND FEMALE RATS:

1968 ◽  
Vol 58 (4) ◽  
pp. 600-612 ◽  
Author(s):  
Robert Boyd ◽  
Donald C. Johnson
Keyword(s):  
Ascorbic Acid ◽  
Testosterone Propionate ◽  
Female Rats ◽  
Female Rat ◽  
Feedback Effects ◽  
Male And Female ◽  
Prostate Weight ◽  
Male And Female Rats ◽  
Males And Females ◽  
Normal Males

ABSTRACT The effects of various doses of testosterone propionate (TP) upon the release of luteinizing hormone (LH or ICSH) from the hypophysis of a gonadectomized male or female rat were compared. Prostate weight in hypophysectomized male parabiotic partners was used to evaluate the quantity of circulating LH. Hypophyseal LH was measured by the ovarian ascorbic acid depletion method. Males castrated when 45 days old secreted significantly more LH and had three times the amount of pituitary LH as ovariectomized females. Administration of 25 μg TP daily reduced the amount of LH in the plasma, and increased the amount in the pituitary gland, in both sexes. Treatment with 50 μg caused a further reduction in plasma LH in males, but not in females, while pituitary levels in both were equal to that of their respective controls. LH fell to the same low level in partners of males or females receiving 100 μg TP. When gonadectomized at 39 days, males and females had the same amount of plasma LH, but males had more stored hormone. Pituitary levels were unchanged from controls following treatment with 12.5, 25 or 50 μg TP daily, but plasma values dropped an equal amount in both sexes with the latter two doses. Androgenized males or females, gonadectomized when 39 days old, were very sensitive to the effects of TP and plasma LH was significantly reduced with 12.5 μg daily. Pituitary LH in androgenized males was higher than that of normal males but was reduced to normal by small amounts of TP. The amount of stored LH in androgenized females was not different from that of normal females and it was unchanged by any dose of TP tested. Results are consistent with the conclusion that the male hypothalamic-hypophyseal axis is at least as sensitive as the female axis to the negative feedback effects of TP. Androgenization increases the sensitivity to TP in both males and females.

Gender Differences in Clothing Worn in Current Popular Comic Books

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Kyle Landon Jossy
Keyword(s):  
Gender Differences ◽  
Content Analysis ◽  
Comic Books ◽  
Book Industry ◽  
Comic Book ◽  
Lower Body ◽  
Female Characters ◽  
Male And Female ◽  
Males And Females

This study looked at how males and females were portrayed, based on the amount of skin shown in the clothing worn.  A Content analysis was performed on a sample of 20 randomly selected popular comics from the last 3 years.  Both male and female characters were rated on how much skin they showed in three clothing categories; neck line, sleeve length, and lower body.  Results showed that in all 3 categories, women consistently wore more revealing clothing.  The findings demonstraetd that the comic book industry is comparable to other forms of media, in the sexualization of female characters, by having them wear more revealing clothing.

scholarly journals Spinal Muscular Atrophy after Nusinersen Therapy: Improved Physiology in Pediatric Patients with No Significant Change in Urine, Serum, and Liquor 1H-NMR Metabolomes in Comparison to an Age-Matched, Healthy Cohort

Metabolites ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 206
Author(s):  
Leon Deutsch ◽  
Damjan Osredkar ◽  
Janez Plavec ◽  
Blaž Stres
Keyword(s):  
Machine Learning ◽  
Spinal Muscular Atrophy ◽  
1H Nmr ◽  
Pediatric Patients ◽  
Muscular Atrophy ◽  
Male And Female ◽  
Before And After ◽  
Healthy Cohort ◽  
Males And Females ◽  
Urine Serum

Spinal muscular atrophy (SMA) is a genetically heterogeneous group of rare neuromuscular diseases and was until recently the most common genetic cause of death in children. The effects of 2-month nusinersen therapy on urine, serum, and liquor 1H-NMR metabolomes in SMA males and females were not explored yet, especially not in comparison to the urine 1H-NMR metabolomes of matching male and female cohorts. In this prospective, single-centered study, urine, serum, and liquor samples were collected from 25 male and female pediatric patients with SMA before and after 2 months of nusinersen therapy and urine samples from a matching healthy cohort (n = 125). Nusinersen intrathecal application was the first therapy for the treatment of SMA by the Food and Drug Administration (FDA) and the European Medicines Agency (EMA). Metabolomes were analyzed using targeted metabolomics utilizing 600 MHz 1H-NMR, parametric and nonparametric multivariate statistical analyses, machine learning, and modeling. Medical assessment before and after nusinersen therapy showed significant improvements of movement, posture, and strength according to various medical tests. No significant differences were found in metabolomes before and after nusinersen therapy in urine, serum, and liquor samples using an ensemble of statistical and machine learning approaches. In comparison to a healthy cohort, 1H-NMR metabolomes of SMA patients contained a reduced number and concentration of urine metabolites and differed significantly between males and females as well. Significantly larger data scatter was observed for SMA patients in comparison to matched healthy controls. Machine learning confirmed urinary creatinine as the most significant, distinguishing SMA patients from the healthy cohort. The positive effects of nusinersen therapy clearly preceded or took place devoid of significant rearrangements in the 1H-NMR metabolomic makeup of serum, urine, and liquor. Urine creatinine was successful at distinguishing SMA patients from the matched healthy cohort, which is a simple systemic novelty linking creatinine and SMA to the physiology of inactivity and diabetes, and it facilitates the monitoring of SMA disease in pediatric patients through non-invasive urine collection.

scholarly journals Stem cell treatment improves post stroke neurological outcomes: a comparative study in male and female rats

2021 ◽  
pp. svn-2020-000834
Author(s):  
Koteswara Rao Nalamolu ◽  
Bharath Chelluboina ◽  
Casimir A Fornal ◽  
Siva Reddy Challa ◽  
David M Pinson ◽  
...  
Keyword(s):  
Stem Cells ◽  
Sex Differences ◽  
Motor Function ◽  
Infarct Volume ◽  
Female Rats ◽  
Human Umbilical Cord ◽  
Male And Female ◽  
Post Stroke ◽  
Male And Female Rats ◽  
Males And Females

Background and purposeThe therapeutic potential of different stem cells for ischaemic stroke treatment is intriguing and somewhat controversial. Recent results from our laboratory have demonstrated the potential benefits of human umbilical cord blood-derived mesenchymal stem cells (MSC) in a rodent stroke model. We hypothesised that MSC treatment would effectively promote the recovery of sensory and motor function in both males and females, despite any apparent sex differences in post stroke brain injury.MethodsTransient focal cerebral ischaemia was induced in adult Sprague-Dawley rats by occlusion of the middle cerebral artery. Following the procedure, male and female rats of the untreated group were euthanised 1 day after reperfusion and their brains were used to estimate the resulting infarct volume and tissue swelling. Additional groups of stroke-induced male and female rats were treated with MSC or vehicle and were subsequently subjected to a battery of standard neurological/neurobehavioral tests (Modified Neurological Severity Score assessment, adhesive tape removal, beam walk and rotarod). The tests were administered at regular intervals (at days 1, 3, 5, 7 and 14) after reperfusion to determine the time course of neurological and functional recovery after stroke.ResultsThe infarct volume and extent of swelling of the ischaemic brain were similar in males and females. Despite similar pathological stroke lesions, the clinical manifestations of stroke were more pronounced in males than females, as indicated by the neurological scores and other tests. MSC treatment significantly improved the recovery of sensory and motor function in both sexes, and it demonstrated efficacy in both moderate stroke (females) and severe stroke (males).ConclusionsDespite sex differences in the severity of post stroke outcomes, MSC treatment promoted the recovery of sensory and motor function in male and female rats, suggesting that it may be a promising treatment for stroke.

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