Sexual differences in morphology and niche utilization in an aquatic snake, Acrochordus arafurae

Oecologia ◽  
1986 ◽  
Vol 69 (2) ◽  
pp. 260-267 ◽  
Author(s):  
Richard Shine
Keyword(s):  
Sexual Differences ◽  
Acrochordus Arafurae

Sexual differences in human cranial morphology: is one sex more variable or one region more dimorphic?

2021 ◽  
Author(s):  
Marco Milella ◽  
Daniel Franklin ◽  
Maria Giovanna Belcastro ◽  
Andrea Cardini
Keyword(s):  
Sexual Differences ◽  
Cranial Morphology

Infection of American smelt in Lake Ontario and Lake Erie with the microsporidian parasite Glugea hertwigi (Weissenberg)

1972 ◽  
Vol 50 (9) ◽  
pp. 1183-1188 ◽  
Author(s):  
M. Chen ◽  
G. Power
Keyword(s):  
Digestive Tract ◽  
Lake Erie ◽  
Ovarian Tissue ◽  
Lake Ontario ◽  
Parasite Load ◽  
Sexual Differences ◽  
Striking Difference ◽  
Female Fish ◽  
Microsporidian Parasite ◽  
Male Fish

In samples taken monthly throughout the year the percentage of American smelt in Lake Ontario and Lake Erie containing cysts of Glugea hertwigi was 5.2% and 62.7% respectively. Sexual differences in incidence were observed, the significance of which was uncertain as results from the two lakes were contradictory.In male fish infection was almost entirely restricted to the digestive tract with few cysts in the liver, skin, and testes. In female fish the digestive tract and ovaries were similarly infected.Seasonal fluctuations in Glugea infection were obvious and seemed correlated with the gonadal cycle. In both sexes the highest parasite load corresponded with the onset of maturation.A striking difference in fecundity between the two smelt populations was attributed to the Glugea infection. In females parasite cysts replaced ovarian tissue, causing a reduction in the number of maturing eggs.

Sexual Difference, Animal Difference: Derrida and Difference “Worthy of Its Name”

Hypatia ◽  
2009 ◽  
Vol 24 (2) ◽  
pp. 54-76 ◽  
Author(s):  
Kelly Oliver
Keyword(s):  
Sexual Difference ◽  
Sexual Differences ◽  
Binary Opposition ◽  
Infinite Variety

I challenge the age-old binary opposition between human and animal, not as philosophers sometimes do by claiming that humans are also animals, or that animals are capable of suffering or intelligence, but rather by questioning the very category of “the animal” itself. This category groups a nearly infinite variety of living beings into one concept measured in terms of humans—animals are those creatures that are not human. In addition, I argue that the binary opposition between human and animal is intimately linked to the binary opposition between man and woman. Furthermore, I suggest that thinking through animal differences or differences among various living creatures opens up the possibility of thinking beyond the dualist notion of sexual difference and enables thinking toward a multiplicity of sexual differences.

Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding

2012 ◽  
Vol 112 (2) ◽  
pp. 90-96 ◽  
Author(s):  
Andrea Raya Rey ◽  
Klemens Pütz ◽  
Gabriela Scioscia ◽  
Benno Lüthi ◽  
Adrián Schiavini
Keyword(s):  
Foraging Behaviour ◽  
Sexual Differences ◽  
Magellanic Penguins

Sexual Differences and Character Trends

Psychiatry ◽  
1943 ◽  
Vol 6 (3) ◽  
pp. 301-305
Author(s):  
Ruth Herschberger
Keyword(s):  
Sexual Differences

Variation in Weight, Size, and Sex Ratio of Coccinellid Adults (Coleoptera: Coccinellidae)

1966 ◽  
Vol 98 (6) ◽  
pp. 639-644 ◽  
Author(s):  
B. C. Smith
Keyword(s):  
Body Size ◽  
Sex Ratio ◽  
Water Content ◽  
Food Supply ◽  
Sexual Differences ◽  
Intraspecies Variation ◽  
Food Scarcity ◽  
Food Requirement ◽  
Males And Females

AbstractThe weight and size of coccinellid adults varied with species, sex, and feeding. Intraspecies variation in weight was generally similar in the eight species studied. Females were more variable than males in body size. Females of some species were heavier and larger than males, and species can be classified on a basis of difference in the weight and size of the sexes.An increase in the food supply after a period of food scarcity affected the sex ratio, as the minimum food requirement of females was greater than males. Females increased in weight more rapidly than males after feeding. The availability of food in the field affected the weight and size of some species. Adult water content was influenced by feeding but not by sex or the quantity of food given to the larva.Males were more abundant in species with small sexual differences in weight and size. The degree of difference in weight and size between males and females may be used as a criterion to select species that are best adapted to survive when food is scarce.

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