Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

SEX RATIOS IN THE POPULATION OF THYSANOESSA RASCHII (M. SARS, 1864) (EUPHAUSIACEA) IN THE BARENTS SEA (WITH SOME NOTES ON THE SEX RATIOS IN THE ORDER EUPHAUSIACEA)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Crustaceana

The seasonal and interannual variability of sex ratios (SR) of the Barents Sea population of the euphausiid, Thysanoessa raschii has been studied. In the winter-spring population the males dominate (SR > 1), in summer and autumn the females prevail (SR < 1). A connection was found between the SR and the water temperature two years earlier (minimal in that year and average for May, during which period zygotes are maturing, and embryogenesis and larval development take place). As a result of the increasing temperature, the share of the males in the population is reduced. The seasonal dynamics of the SR of T.raschii are discussed in connection with a general view about life cycles in euphausiids. The evolutionary processes ensuring the formation of the proper sexual structure in euphausiid populations as a whole, are considered.

La variabilité saisonnière et interannuelle des sex-ratios (SR) de la population d'Euphausiacés de Thysanoessa raschii de la mer de Barentz a été étudiée. Dans la population d'hiver et de printemps, les mâles sont dominants (SR > 1); en été et en automne, les femelles sont dominantes (SR < 1). Une relation a été établie entre la SR et la température de l'eau, deux ans plus tôt (minimale cette annéelà et moyenne en mai, lors de la maturation des zygotes, de l'embryogenèse et du développement larvaire). Avec la baisse de la température, la proportion des mâles dans la population a diminué. La dynamique saisonnière de la sex-ratio (SR) de T. raschii a été discutée par rapport aux données générales concernant le cycle de vie des Euphausiacés. Des hypothèses sont émises sur les processus évolutifs responsables d'une répartition particulière des sexes dans les populations d'Euphausiacés en général.

Loading

Full text loading...

/content/journals/10.1163/15685400260569599
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/15685400260569599
Loading

Article metrics loading...

/content/journals/10.1163/15685400260569599
2002-08-01
2017-05-28

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Crustaceana — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation