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Start Over Subject mravenci

1. Historie výzkumu mravenců (Hymenoptera: Formicidae) v Jeseníkách /

Creator:
Bezděčka, Pavel,
Type:
články
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, entomologie, vědy přírodní, biologie, dějiny vědy, přírodovědci, mravenci, české země od r. 1993 do současnosti, Československo 1918-1992, vědy o neživé přírodě, přírodní prostředí, astronomie, and vědy o živé přírodě
Language:
Czech
Description:
Geschichte der Forschungen zu Ameisen (Hymenoptera: Formicidae) in Jeseníky.
Rights:
unknown

3. Site latitude influences on respiration rate, fat content and the ability of worker ants to rear larvae: A comparison of Myrmica rubra (Hymenoptera: Formicidae) populations over their European range

Creator:
Elmes, Graham W., Radchenko, Alexander G., Barr, Boyd, Wardlaw, Judith C., Nielsen, Mogens G., Kipyatkov, Vladilen E., and Lopatina, Elena B.
Format:
print, text, and regular print
Type:
article, bibliography, conference publication, model:article, and TEXT
Subject:
zoologie, fyziologie živočichů, ekofyziologie, hmyz, mravenci, Myrmica rubra, dýchání, obsah tuku, péče o larvy, hranice rozšíření, vliv zeměpisné polohy, 591.5, 061.3, and 595.2/.7
Language:
English
Description:
Myrmica rubra is a northern, temperate Palaearctic ant species with a geographical range that extends from the Atlantic coast of Europe to central Asia. In Europe, its range covers > 25° of latitude where it lives under a variety of climates that vary from extreme oceanic in the west, to continental in the east. Colonies nest in the soil and their life cycles are known to be highly dependent on ambient temperature and soil moisture. We hypothesised that the brood-rearing behaviour of populations might be focally adapted to climate and that we might detect differences when the ants were reared under \"common-garden\" conditions. Brood-rearing behaviour was compared for 38 colonies of M. rubra drawn from 13 populations representing a range of 6 latitudes: all 6 were represented in eastern Europe and 2 in western Europe. A sample of ants from each colony was used to estimate respiration rate, body mass and fat content at the start of the experiment in spring (immediately post hibernation) and at the end of the experiment (mid summer). Respiration had a linear relationship with latitude, with northern populations having greater respiration rate in spring compared to southern populations. It is suggested that this is an adaptation to different seasonality over the species' range that results in the \"more active\" northern workers rearing fewer brood to maturity more quickly than southern workers. Fat content, a measure of worker \"quality\", had a parabolic relationship with latitude with mid latitude colonies having the fattest workers. Fatter workers appeared to rear heavier brood. This probably represented a functional response to environment with populations living at \"edge of range\" sites being physiologically more stressed and performing brood-rearing tasks less well than centre of range populations. We believe that this is the first demonstration of a consistent, intra-specific trend for Variation in the social physiology of an ant species over its geographic range., Graham W. Elmes, Judith C. Wardlaw, Mogens G. Nielsen, Vladilen E. Kipyatko, Elena B. Lopatina, Alexander G. Radchenko, Boyd Barr, and Lit
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

4. Tajemství pestrosti společenstev mravenců v korunách tropických stromů

Creator:
Petr Klimeš and Mottl, Ondřej
Format:
bez média and svazek
Type:
article, text, články, journal articles, model:article, and TEXT
Subject:
Biologické vědy, Akademie věd České republiky., Biologické centrum, biologie, mravencovití, biocenózy, tropické lesy, tropické dřeviny, biodiverzita, biology, ants, biocenoses, tropical forests, tropical woody plants, biodiversity, Nová Guinea (ostrov), New Guinea Island, mravenci, stromová společenstva, Formicidae, 2, and 57/59
Language:
Czech
Description:
Mravenci jsou jednou z nejpočetnějších skupin bezobratlých živočichů žíjících v korunách tropických stromů. Tým vědců z Českých Budějovic objasnil otázky ohledně biodiverzity a ekologických nároků stromových společenstev mravenců za pomoci nejrůznějších metod od vykácení a rozebrání celých kusů pralesa, sestrojení experimentálních pastí až po počítačové simulace. Výzkum pomohl získat klíčové poznatky nejen o tropických lesích pro vědu, ale přispět i k jejich ochraně a vzdělání domorodých obyvatel, kteří v nich žijí., Ants are one of the most abundant groups of invertebrates living in the canopies of tropical trees. In their research a team of scientists from České Budějovice clarified the drivers of high diversity and the ecological preferences of ant arboreal communities using a variety of techniques from felling and dissecting trees in entire forest plots and the construction of special experimental traps to computer simulations. This research helped to advance not only our knowledge about tropical rainforests, but it was also significant for tropical forest conservation and the education of the native people depending on them., and Petr Klimeš, Ondřej Mottl.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public