Výsledky vyhledávání - "Norbert Hrassnigg"

Akademický článek

Does Patriline Composition Change over a Honey Bee Queen’s Lifetime?

Autor: Karl Crailsheim, Robert Brodschneider, Gérard Arnold, Norbert Hrassnigg

Publikováno v: Insects, Vol 3, Iss 3, Pp 857-869 (2012)

A honey bee queen mates with a number of drones a few days after she emerges as an adult. Spermatozoa of different drones are stored in her spermatheca and used for the rest of the queen’s life to fertilize eggs. Sperm usage is thought to be random

Externí odkaz: https://doaj.org/article/fc46eff75762419b9313e6c70f35b512

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Does Patriline Composition Change over a Honey Bee Queen’s Lifetime?

Autor: Gérard Arnold, Norbert Hrassnigg, Robert Brodschneider, Karl Crailsheim

Publikováno v: Insects; Volume 3; Issue 3; Pages: 857-869
Insects, Vol 3, Iss 3, Pp 857-869 (2012)
Insects

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fa7c3917c4fa5e646bad39466012a5a
https://doi.org/10.3390/insects3030857

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Predator-prey interaction between drones ofApis mellifera carnicaand insectivorous birds

Autor: Martin H. Kärcher, Karl Crailsheim, Norbert Hrassnigg, Peter H. W. Biedermann

Publikováno v: Kärcher, Martin H.; Biedermann, Peter H.W.; Hrassnigg, Norbert; Crailsheim, Karl (2008). Predator-prey interaction between drones of Apis mellifera carnica and insectivorous birds. Apidologie, 39(3), pp. 302-309. Dordrecht: Springer 10.1051/apido:2008001

Large offers of food usually do not remain unexploited in nature. For that reason several mechanisms have evolved to counteract predation, such as congregating in masses or producing a repellent substance. We investigated whether drones are preyed up

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e39b4c78a63065b5b38320ba3c931608
https://doi.org/10.1051/apido:2008001

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Association of Institutes for Bee Research, Report of the 54th seminar in Veitshöchheim, 27–29 March 2007

Autor: E. Etzold, Y. Schrüffer, Norbert Hrassnigg, D. Weber, Helmut Kovac, H. Köglberger, R. Martín, J. Kühn, A. Ashiralieva, B. Fritz, N. Nordhoff, E. Mertens, M. Kleinhenz, M. Petz, Jürgen Tautz, Klaus Hartfelder, K. Forchmann, B. Lichtenberg-Kraag, J. Ruther, I. Illies, Dieter Wittmann, E. Frey, C. Färber, I. Hoffmann, K. Bienefeld, J. Lipka, D. Yue, J. Raehse, Klaus Wallner, W. von der Ohe, Robert J. Paxton, Wolfgang H. Kirchner, Karl Crailsheim, K. von der Ohe, Gerhard Liebig, Peter Rosenkranz, Ulrike Riessberger-Gallé, K. Friedrichs, N. Seelinger, Annette Schroeder, Sophie Krainer, Nikolaus Koeniger, L. H. Wieler, A. Hamm, R. C. Peruquetti, A. Meana, Stefan Fuchs, K. Schneider, L. Trein, I. Loncaric, B. Meffert, J. Wegener, Zachary Y. Huang, W. Schumacher, K. Ruoff, Robin F. A. Moritz, R. Büchler, K. Sölch, M. Kasina, Reinhold Siede, H. Steidle, C. Yue, M. Schröder, J. Radtke, R. Siede, B. Bujok, Jutta Vollmann, C. Weißenborn, A. Schlesinger, M. Interthal, R. Alkattea, S. Berg, B. Mergler, J. Smanalieva, K. Hedtke, I. Derakhshifar, B. Senge, Heinz-Jürgen Thiel, M. Schindler, A. M. Muffert, E. M. Haas, K. Jänicke, P. Aumeier, M. T. Almanza, R. Moosbeckhofer, T. Kühn, Gustavo R. Makert, E. Genersch, K. Uhl, Sebastian Spiewok, I. Iilies, M. Higes, Robert Brodschneider, Matthias König, U. Knauer, Ch. Heimken, E. Schmolz, Ronald Thenius, Ch. Martius

Publikováno v: Apidologie. 38:482-504

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6153507a4a1f338e1d1f5ad0b3758f2
https://doi.org/10.1051/apido:2007030

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Free amino acids in the haemolymph of honey bee queens(Apis mellifera L.)

Autor: B. Leonhard, Norbert Hrassnigg, Karl Crailsheim

Publikováno v: Amino Acids. 24:205-212

In queen honey bees the free amino acid content in the haemolymph clearly depends on the physiological function and social environment of the individual. While in drones and workers the content of free amino acids increases after emergence until it r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ccfed9f86db25378737f47e6e60b46c
https://doi.org/10.1007/s00726-002-0311-y

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Endothermic heat production in honeybee winter clusters

Autor: Anton Stabentheiner, Karl Crailsheim, Thomas Papst, Norbert Hrassnigg, Helga Pressl

Publikováno v: Journal of Experimental Biology. 206:353-358

SUMMARYIn order to survive cold northern winters, honeybees crowd tightly together in a winter cluster. Present models of winter cluster thermoregulation consider the insulation by the tightly packed mantle bees as the decisive factor for survival at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31e82c2ef1387c3870ef0bc2fe2ea49d
https://doi.org/10.1242/jeb.00082

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Sauerstoffverbrauch isolierter Honigbienen bei verschiedenen Aktivitätsstufen und Umgebungstemperaturen (Hymenoptera: Apidae)

Autor: Norbert Hrassnigg, Karl Crailsheim, B. Leonhard, Anton Stabentheiner

Publikováno v: Entomologia Generalis. 24:1-12

Energy metabolism was measured in isolated honeybee foragers [Apis mellifera carnica Pollmann 1879] and compared with their level of activity at two ambient temperatures. Artificially immobilised bees consumed more oxygen (averages: 7.4 and 6.9 μl O

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6dff53eae6e5b847ece9043502074a7d
https://doi.org/10.1127/entom.gen/24/1999/1

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Einfluß von Schlechtwetter auf die Entwicklung von Brutnest und Pollenvorrat bei der Honigbiene (Hymenoptera: Apidae)

Autor: Helmut Guttenberger, Birgit Blaschon, Karl Crailsheim, Norbert Hrassnigg

Publikováno v: Entomologia Generalis. 24:49-60

A honeybee colony of the race Apis mellifera carnica Pollmann 1879 with about 12.300-13.100 individuals, housed in an eight-frame observation hive (2 x 4 vertically arranged frames), was observed in summer 1997. The amounts of food stores and brood w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::037f31b702c5fa580b6c536188f1d245
https://doi.org/10.1127/entom.gen/24/1999/49

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Stoffwechselraten und metabolische Leistung von Honigbienen im Fesselflug in Abhängigkeit von Temperatur und Luftwiderstand (Hymenoptera: Apidae)

Autor: Karl Crailsheim, Norbert Hrassnigg

Publikováno v: Entomologia Generalis. 24:23-30

Worker honeybees of the race Apis mellifera carnica Pollmann 1879 were fed defined amounts of sugar solutions and were stimulated to fly in a flight mill (roundabout) at different temperatures and drag conditions. The bees' metabolic rate (oxygen con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d4bdf0431df72c46bdb35746d0c72eb0
https://doi.org/10.1127/entom.gen/24/1999/23

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The influence of brood on the pollen consumption of worker bees (Apis mellifera L.)

Autor: Norbert Hrassnigg, Karl Crailsheim

Publikováno v: Journal of Insect Physiology. 44:393-404

(1) In midgut dry weight (tissue plus contents) of worker bees we found a representative parameter for pollen consumption. Midguts of bees of successive ages were analyzed and correlated with various parameters. The relative proportions of sugar, pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07816c3162a3b970e9a4ee98abdb74ff
https://doi.org/10.1016/s0022-1910(98)00022-5

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