Chromatin patterns in fishes with emphasis on sexual dimorphism

1970 ◽  
Vol 48 (6) ◽  
pp. 1283-1286 ◽  
Author(s):  
Phyllis A. Gee ◽  
Keith L. Moore
Keyword(s):  
Rainbow Trout ◽  
Sexual Dimorphism ◽  
Sex Difference ◽  
Salmo Gairdneri ◽  
Sex Chromatin ◽  
Chromatin Patterns

Twelve species of fish were investigated to determine whether sexual dimorphism occurs in the nuclei of their tissues as has been described for mammals. Feulgen-positive masses were present in nuclei of most tissues; some were similar in size, shape, and location to sex chromatin found in human buccal smears of the female. Although in Salmo gairdneri (rainbow trout) incidences of intranuclear chromatin masses in tissues of males were significantly higher than those of females, it was impossible to detect microscopically a nuclear sex difference in any of the species examined.

SEXUAL DIMORPHISM IN INTERPHASE NUCLEI OF THE LION, FELIS LEO

1965 ◽  
Vol 43 (3) ◽  
pp. 439-445
Author(s):  
Keith L. Moore
Keyword(s):  
Sexual Dimorphism ◽  
Nucleic Acid ◽  
Sex Difference ◽  
Nuclear Membrane ◽  
Sex Chromosome ◽  
Cell Types ◽  
Interphase Nuclei ◽  
X Chromosomes ◽  
Sex Chromatin ◽  
Inner Surface

A sex difference is present in the structure of interphase nuclei of somatic cells in a variety of tissues of the lion. In the female, but not in the male, there is a special mass of chromatin, the sex chromatin, which stands out from the general particulate chromatin. In neurons the sex chromatin is usually located adjacent to the nucleolus, but in other cell types it nearly always lies against the inner surface of the nuclear membrane. The sex chromatin has the cytochemical properties of desoxypentose nucleic acid and is probably derived from heterochromatic regions of one of the X-chromosomes of the female's sex chromosome complex. A mass similar to the sex chromatin of females is rarely encountered in nuclei of males. The sexual dimorphism present in interphase nuclei of the lion is similar to that described previously in other carnivores and in primates.

Temperature Selection of Rainbow Trout (Salmo gairdneri) Fingerlings in Vertical and Horizontal Gradients

1971 ◽  
Vol 28 (11) ◽  
pp. 1801-1804 ◽  
Author(s):  
R. W. McCauley ◽  
W. L. Pond
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Temperature Preference ◽  
Temperature Selection ◽  
Horizontal Gradients ◽  
Significant Difference ◽  
Preferred Temperatures ◽  
Laboratory Investigations ◽  
Horizontal Temperature Gradients ◽  
Selection Of

Preferred temperatures of underyearling rainbow trout (Salmo gairdneri) were determined in both vertical and horizontal temperature gradients. No statistically significant difference was found between the preferred temperatures by the two different methods. This suggests that the nature of the gradient plays a lesser role than generally believed in laboratory investigations of temperature preference.

scholarly journals The Distribution of 35S-Sulfadiazine and 14G-Trimethoprim in Rainbow Trout, Salmo Gairdneri

1979 ◽  
Vol 20 (1) ◽  
pp. 25-37 ◽  
Author(s):  
Torill Bergsjø ◽  
Inger Nafstad ◽  
Kristian Ingebrigtsen
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri
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