geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Regulierung des Proteinhaushaltes im Bienenvolk (Apis mellifica L.) durch Brutkannibalismus


, : Regulierung des Proteinhaushaltes im Bienenvolk (Apis mellifica L.) durch Brutkannibalismus. Apidologie, 153: 339-354

Newly emerged bees were put into small wooden test-cages (50 bees/cage) and fed a solution of saccharose and water (50%). They also received brood of different ages in small dishes (larvae, prepupae and pupae). One part of the cages was provided also with pollen. The bees of one cage received only sugar water and pollen and in another cage they got nothing but sugar water. For the experiments the bees were kept in an incubator (30.degree. C, 60% r.h. relative humidity ). The bees began to eat brood and, as long as it was offered, pollen. They ate pollen up to the 12th day and brood up to the 25th day, and to a minor extent after the 15th day. The brood-eating bees were nervous and aggressive and consumed comparatively more sugar water. Bees provided with pollen as well as those without pollen ate brood. Both groups had an equal lifespan between 33 and 46 days (to 50% mortality). Bees fed with very young larvae without pollen had shorter lifespans. The reason for this may have been insufficient protein. The shortest lifespan (20 days) occurred in control bees fed only sugar water. In another series of experiments under the same conditions each cage was provided continuously with pieces of broodcombs containing 2 larvae 0.5-3 days old. In addition to this one group received only sugar water, another sugar water and pollen and a 3rd group sugar water and brood in small dishes. With the protein consumed by brood-eating the caged bees were able to raise brood. They took care of only a few cells (1-15 per cage) if they received only the continuously renewed pieces of broodcomb in their cages. Considerably more cells were sealed if the bees obtained additional larvae. If they got pollen instead of larvae the result of brood-rearing was poorer. Brood-eating lasted until the 27th day of life and only as long as bees reared brood. The bees reared by brood-eating bees were relatively small but their organs developed normally.

US$29.90


Other references

Schweickerdt, H.G., 1950: Neue Untersuchungen an Secale africanum Stapf I Zur Wieder-auffindung des afrikanischen Roggens A Entdeckung und systernatische Stellung des Secale africanum B Geschichte der Wiederauffindung. References to S. africanum and its distr. are reviewed. It is concluded that it is endemic to a narrow region in Cape Prov., Africa.

Lee, I.S.; Slonczewski, J.L.; Foster, J.W., 1994: A low-pH-inducible, stationary-phase acid tolerance response in Salmonella typhimurium. Acid is an important environmental condition encountered by Salmonella typhimurium during its pathogenesis. Our studies have shown that the organism can actively adapt to survive potentially lethal acid exposures by way of at least three possibly...

Erfurt, C.; Hahn, G.; Roesner, D.; Schmidt, U., 2010: Pediatric radiological diagnostics in suspected child abuse. Advanced and specialized radiological diagnostics are essential in the case of clinical suspicion of pediatric injuries to the head, thorax, abdomen, and extremities when there is no case history or when "battered child syndrome" is assu...

Rodday, A.Mae.; Parsons, S.K.; Mankiw, C.; Correll, C.U.; Robb, A.S.; Zima, B.T.; Saunders, T.S.; Leslie, L.K., 2016: Child and adolescent psychiatrists' reported monitoring behaviors for second-generation antipsychotics. The number of children and adolescents (hereafter referred to as "children") who have been prescribed second-generation antipsychotics (SGAs) has increased over the last decade, but little is known about monitoring practices in pediatric...

Bolton, P.H.; Kearns, D.R., 1977: Effect of magnesium and poly amines on the structure of yeast phenyl alanine transfer rna. The effect of magnesium and polyamines (spermine, spermidine, putrescine and cadaverine) on the structure of yeast tRNAPhe was investigated. It was found that Mg induces structural changes and stabilizes H- bonds in the temperature range 22-44.deg...

Anonymous, 2002: Let market be your guide. Farmers Weekly 137(19

Hansen J.W.; Olsen K.J., 1985: Theoretical and experimental radiation effectiveness of the free radical dosimeter alanine to irradiation with heavy charged particles. Dose-response characteristics have been measured for the crystalline amino acid L-.alpha.-alanine irradiated with ion beams of 6 and 16 MeV protons, 20 MeV .alpha. particles, 21 MeV7Li ions, 64 MeV16O ions, and 80 MeV32S ions. The experimental rad...

Taiti, S.; Ferrara, F., 1980: The family Philosciidae (Crustacea Oniscoidea) in Africa, south of the Sahara. The family Philosciidae is represented in Africa by 22 genera including Aphiloscia Budde-Lund, 1908; Buddelundiscus Verhoeff, 1942; Massaiscia Verhoeff, 1942; Komatla Barnard, 1932; Perinetia Barnard, 1958; Pleopodoscia Verhoeff, 1942; Didema Budd...

Moreno Manas M.; Pleixats R., 1992: Dehydroacetic acid triacetic acid lactone and related pyrones. Katritzky, A R (Ed ) Advances in Heterocyclic Chemistry, Vol 53 Vii+429p Academic Press, Inc : San Diego, California, Usa; London, England, Uk Illus 1-84

Ebert, R., 1994: Prognostic parameters in equine colic. In a retrospective study on records of 271 horses referred with colic over a period of 2 years, to examine the prognostic value of different clinical and diagnostic laboratory parameters, by Student's t-test and the Chi-quadrat test, the foll...