scholarly journals The status of Asthenopus Curtus (Hagen) (Ephemeroptera: Polymitarcyidae) ()

1978 ◽  
Vol 8 (1) ◽  
pp. 103-105 ◽  
Author(s):  
Lewis Berner
Keyword(s):  
Adult Male ◽  
Single Species ◽  
Sexually Dimorphic ◽  
Male And Female ◽  
The Status ◽  
Males And Females

Abstract Study of a series of reared adult male and female mayflies in the genus Asthenopus from the Amazon demonstrated that males had been described by Hagen as A. curtus and females as A. amazonicus. As only a single species is represented by the strongly sexually dimorphic males and females, all should be designated as A. curtus (Hagen) and A. amazonicus (Hagen) is, therefore, a synonym.

scholarly journals Heightened condition dependent expression of structural colouration in the faces, but not wings, of male and female flies

2021 ◽  
Author(s):  
Thomas E White ◽  
Amy Locke ◽  
Tanya Latty
Keyword(s):  
Mate Choice ◽  
Condition Dependence ◽  
Sexually Dimorphic ◽  
Male And Female ◽  
Honest Signals ◽  
Mutual Mate Choice ◽  
Close Range ◽  
Males And Females ◽  
Structural Colouration

Abstract Structurally coloured sexual signals are a conspicuous and widespread class of ornament used in mate choice, though the extent to which they encode information on the quality of their bearers is not fully resolved. Theory predicts that signalling traits under strong sexual selection as honest indicators should evolve to be more developmentally integrated and exaggerated than nonsexual traits, thereby leading to heightened condition dependence. Here we test this prediction through examination of the sexually dimorphic faces and wings of the cursorial fly Lispe cana. Males and females possess structural UV-white and golden faces, respectively, and males present their faces and wings to females during close-range, ground-based courtship displays, thereby creating the opportunity for mutual inspection. Across a field-collected sample of individuals, we found that the appearance of the faces of both sexes scaled positively with individual condition, though along separate axes. Males in better condition expressed brighter faces as modelled according to conspecific flies, whereas condition scaled with facial saturation in females. We found no such relationships for their wing interference pattern nor abdomens, with the latter included as a nonsexual control. Our results suggest that the structurally coloured faces, but not the iridescent wings, of male and female Lispe cana are reliable guides to individual quality and support the broader potential for structural colours as honest signals. They also highlight the potential for mutual mate choice in this system, while arguing for one of several alternate signalling roles for wing interferences patterns among the myriad taxa which bear them.

The Males of Dialictus laevissimus (Smith) and D. rohweri (Ellis) (Hymenoptera: Halictidae)

1962 ◽  
Vol 94 (11) ◽  
pp. 1228-1231 ◽  
Author(s):  
G. Knerer ◽  
C. E. Atwood
Keyword(s):  
Late Summer ◽  
Early Summer ◽  
Morphological Features ◽  
Limited Area ◽  
Male And Female ◽  
The North ◽  
Junior Author ◽  
The Status ◽  
Males And Females ◽  
Correct Association

Proper association of males with females of the bee family Halictidae presents difficulties not found in most insect groups. In the north temperate zone males emerge in late summer, mate with the females and then die, only females surviving over winter. Collecting in spring and early summer therefore yields only females and only in the later collections do males appear.Correct association between males and females may be secured by excavating burrows after males have emerged from the pupae, by collecting mating pairs or by making such extensive collections in a limited area that statistical evidence may be secured to support conclusions based on morphological features. This technique was used by the junior author in his original studies of Andrenidae and Halictidae (Atwood, 1933) but is by no means a universal practice. Consequently, many species names in the Halictidae are based on descriptions of one sex only while in other instances the association between male and female rests upon a very shaky foundation. This paper is designed to clarify the status of two species which are now in the above categories.

scholarly journals Sexual dimorphism in the permeability response of coronary microvessels to adenosine

2005 ◽  
Vol 288 (4) ◽  
pp. H2006-H2013 ◽  
Author(s):  
Virginia H. Huxley ◽  
JianJie Wang ◽  
Stevan P. Whitt
Keyword(s):  
Sexual Dimorphism ◽  
Serum Albumin ◽  
Adult Male ◽  
Volume Regulation ◽  
Solute Flux ◽  
Male And Female ◽  
Porcine Serum ◽  
Males And Females ◽  
Gender Influences ◽  
Coronary Arterioles

Gender influences volume regulation via several mechanisms; whether these include microvascular exchange, especially in the heart, is not known. In response to adenosine (Ado), permeability ( Ps) to protein of coronary arterioles of female pigs decreases acutely. Whether Ado induces similar Ps changes in arterioles from males or whether equivalent responses occur in coronary venules of either sex has not been determined. Hypotheses that 1) basal Ps properties and 2) Ps responses to vasoactive stimuli are sex independent were evaluated from measures of Ps to two hydrophilic proteins, α-lactalbumin and porcine serum albumin (PSA), in arterioles and venules isolated from hearts of adult male and female pigs. Consistent with hypothesis 1, basal Ps values of both microvessel types were independent of sex. Contrary to hypothesis 2, Ps responses to Ado varied with sex, protein, and vessel type. Confirming earlier studies, Ado induced a ∼20% decrease in Ps to both proteins in coronary arterioles from females. In arterioles from males, Ado did not change Ps for α-lactalbumin ([Formula: see text], 3 ± 13%), whereas Ps for PSA ([Formula: see text]) decreased by 27 ± 8% ( P < 0.005). In venules from females, Ado elevated [Formula: see text] by 44 ± 20% ( P < 0.05), whereas in those from males, Ado reduced [Formula: see text] by 24 ± 5% ( P < 0.05). The variety of outcomes is consistent with transvascular protein and protein-carried solute flux being regulated by multiple sex-dependent mechanisms in the heart and provides evidence of differences in exchange homeostasis of males and females in health and, likely, disease.

A study on comparison of bleeding time and clotting time in young adult male and female subjects

2021 ◽  
Vol 18 (3) ◽  
pp. 05-09
Author(s):  
Ayesha Anjum ◽  
Keyword(s):  
Young Adult ◽  
Adult Male ◽  
Bleeding Time ◽  
P Value ◽  
Clotting Time ◽  
Male And Female ◽  
Young Adult Male ◽  
Males And Females ◽  
The Mean ◽  
Female Subjects

Background: Bleeding time is a laboratory test to assess the platelet function. It is dependent on various factors like function of platelets and pathway of coagulation. Clotting time is the time required for a sample of blood to clot in vitro under standard conditions. It is known from previous studies that there is a difference in the bleeding time and clotting time among males and females. The exact reasons for such differences have been postulated, but are insufficient. Therefore the aim of this study is to study and compare the gender differences in bleeding time and clotting time in young male and female subjects. Aims and objectives: The aim of this study is to determine and compare the differences in bleeding time and clotting time in young adult male and female subjects. Materials and Methods: This study was done in the Department of Physiology, Raichur Institute of Medical Sciences, Raichur. Sixty medical students studying in first year M.B.B.S, were selected for the study, out of which thirty were males, and thirty were females. Bleeding time was determined by Duke’s method and Clotting time was determined by Wrights Capillary tube method. Data was analysed using SPSS software. Unpaired ‘t’ test was used for comparing the values. p value less than 0.05 was considered significant. Result: The mean value of bleeding time in males was found to be,127.69±51,02 and in females it was 133.28±44.30. The mean of the CT in males was 212.18±60 and in females it was found to be 257.16±61.00.The mean BT and CT was significantly higher in females as compared to the males. Conclusion: It was found that there are differences in bleeding time and time in males and females, BT and CT were statistically more in females as compared to females.

Unraveling the white-clothed Diestostemma Amyot & Serville: a taxonomic revision of the American sharpshooters of the D. bituberculatum complex (Hemiptera: Cicadellidae)

Zootaxa ◽  
2017 ◽  
Vol 4281 (1) ◽  
pp. 135 ◽  
Author(s):  
ÂNGELO PARISE PINTO ◽  
GABRIEL MEJDALANI ◽  
DANIELA MAEDA TAKIYA
Keyword(s):  
New Species ◽  
Species Diversity ◽  
Species Complex ◽  
Taxonomic Revision ◽  
Mato Grosso ◽  
Male And Female ◽  
The Status ◽  
Males And Females ◽  
New Geographical Record ◽  
General Appearance

The taxonomy of the Proconiini genus Diestostemma Amyot & Serville is revisited and the D. bituberculatum species complex is proposed to include D. bituberculatum (Signoret), D. rubriventris (Schmidt), and four new species. A revision of this species complex includes a new geographical record for D. rubriventris and description and illustration of three Ecuadorian and one Brazilian new species based on males and females: D. albinoi sp. nov. (Ecuador: Orellana Province), D. cavichiolii sp. nov. (Brazil: Mato Grosso State), D. gervasioi sp. nov. (Ecuador: Orellana Province), and D. olivia sp. nov. (Ecuador: Orellana Province). These species, all named as homages to the treehopper specialist Dr. Albino Morimasa Sakakibara and his former students, are very similar to D. bituberculatum in general appearance, differing mainly by the shape of the male and female terminalia, but also by slight aspects of the external morphology. The status of the name-bearing specimen of D. rubriventris is modified from lectotype to holotype. The study shows that the species diversity of Diestostemma is far from being entirely known. However, several old available names should be evaluated in a full revision context before description of other new species. 

Diving behaviour of male and female western grebes

1988 ◽  
Vol 66 (12) ◽  
pp. 2695-2698 ◽  
Author(s):  
L. Scott Forbes ◽  
Spencer G. Sealy
Keyword(s):  
British Columbia ◽  
Body Size ◽  
Water Depth ◽  
Wave Action ◽  
Diving Behaviour ◽  
Sexually Dimorphic ◽  
Habitat Conditions ◽  
Male And Female ◽  
Males And Females

We studied diving in western grebes (Aechmophorus occidentalis), which are sexually dimorphic, at Duck and Kootenay lakes in southeastern British Columbia to determine if differences in sex, and hence body size, resulted in differences in behaviour. Springing dives were used more frequently in deeper water and when wave action was higher, but there were no clear differences between males and females. As well, the dive–pause regressions for males and females did not differ. We conclude that differences in body size are not important determinants of diving behaviour in western grebes, but that habitat conditions (e.g., water depth, wave action) are.

scholarly journals Comparison of the Status of Interstitial Cells of Cajal in the Smooth Muscle of the Antrum and Pylorus in Diabetic Male and Female Patients with Severe Gastroparesis

2020 ◽  
Vol 2 (3) ◽  
pp. 236-245
Author(s):  
Zorisadday Gonzalez ◽  
Irene Sarosiek ◽  
Mohammad Bashashati ◽  
Brian Davis ◽  
Osvaldo Padilla ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Interstitial Cells Of Cajal ◽  
Interstitial Cells ◽  
Diabetic Patients ◽  
Tissue Samples ◽  
Male And Female ◽  
The Status ◽  
Males And Females ◽  
Stimulation System ◽  
Cells Of Cajal

Females dominate in the area of gastroparesis (GP), making up to 70–80% of these patients. One attractive hypothesis is that females have less smooth muscle reserve and thus less resilience to recover from an insult. Our aim was to investigate if there are gender differences in the number of interstitial cells of Cajal (ICC) in the antral and pyloric smooth muscle of diabetic (DM) patients with severe gastroparesis refractory to standard medical management. Full thickness antral and pyloric biopsies were obtained during surgery to implant a gastric electrical stimulation system and perform a pyloroplasty. Thirty-eight DM patients (66% females, n = 25; mean age 44) who failed medical therapies provided antral biopsies. Pyloric tissue samples were also collected from 29 of these patients (65% females, n = 19). Tissues were stained with H&E and c-Kit for the presence of ICC. ICC depletion was defined as less than 10 cells/HPF. In the antrum, 40% of females had significant ICC depletion, similar to 38% in males. In the pylorus, 68% of females had depletion of ICC, compared to 80% depletion in males. When combining both antral and pyloric smooth muscle regions, ICC depletion was similar in males (40%) when compared to females (38%). In diabetic patients with severe GP, females and males showed similar degrees of reduction in antral ICC, while more males had depletion of pyloric smooth muscle ICC compared to their female counterparts. Future larger studies should focus on whether differences in other smooth muscle biomarkers can be identified between males and females.

scholarly journals Heightened condition dependent expression of structural colouration in the faces, but not wings, of male and female flies

2021 ◽  
Author(s):  
Thomas E White ◽  
Amy Locke ◽  
Tanya Latty
Keyword(s):  
Mate Choice ◽  
Condition Dependence ◽  
Sexually Dimorphic ◽  
Male And Female ◽  
Honest Signals ◽  
Mutual Mate Choice ◽  
Close Range ◽  
Males And Females ◽  
Structural Colouration

Structurally coloured sexual signals are a conspicuous and widespread class of ornament used in mate choice, though the extent to which they encode information on the quality of their bearers is not fully resolved. Theory predicts that signalling traits under strong sexual selection as honest indicators should evolve to be more developmentally integrated and exaggerated than nonsexual traits, thereby leading to heightened condition dependence. Here we test this prediction through examination of the sexually dimorphic faces and wings of the cursorial fly Lispe cana. Males and females possess structural UV-white and golden faces, respectively, and males present their faces and wings to females during close-range, ground-based courtship displays, thereby creating the opportunity for mutual inspection. Across a field-collected sample of individuals, we found that the appearance of the faces of both sexes scaled positively with individual condition, though along separate axes. Males in better condition expressed brighter faces as modelled according to conspecific flies, whereas condition scaled with facial saturation in females. We found no such relationships for their wing interference pattern nor abdomens, with the latter included as a nonsexual control. Our results suggest that the structurally coloured faces, but not the iridescent wings, of male and female Lispe cana are reliable guides to individual quality and support the broader potential for structural colours as honest signals. They also highlight the potential for mutual mate choice in this system, while arguing for one of several alternate signalling roles for wing interferences patterns among the myriad taxa which bear them.

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