Go toArchive
Browse byFacets
Bookbag ( 0 )
'Honey Bee' in keywords
Results  4 Items
Sorted by   
Publication Year
1990 (1)
1980 (1)
1979 (1)
1977 (1)
1Author    G. S. Dogra, G. M. Ulrich, H. RemboldRequires cookie*
 Title    A Comparative Study of the Endocrine System of the Honey Bee Larvae under Normal and Experimental Conditions  
 Abstract    The endocrine system of the honey bee (Apis mellifera L.) has been studied morphologically through post-embryonic development with several histological techniques. Marked differences in the structure of the neurosecretory complex of queen and worker larvae have been observed during larval stages. In queen larvae, morphogenesis of the neurosecretory cells, their axons and the formation of the chiasma takes place during end of 2nd and beginning of 3rd, in the workers at beginning of 4th larval instar. Stainable neurosecretory material was found in queen larvae at the beginning, in worker larvae at the end of 4th instar. In early larval stages, the corpora allata are more active in the queen. During initial 3 — 5 days of larval development the gland volume is reduced in both castes. After 36 to 48 hours of endocrine retardation, the glands become active again. The same histological effects are found under experimental conditions, where worker larvae of 2nd instar were reared in the incubator on basic food, Royal Jelly and with topically applied juvenile hormone I. 
  Reference    (Z. Naturforsch. 32c, 637 [1977]; received February 9 1976/April 4 1977) 
  Published    1977 
  Keywords    Insect, Endocrinology, Honey Bee, Caste Determination, Juvenile Hormone 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0637.pdf 
 Identifier    ZNC-1977-32c-0637 
 Volume    32 
2Author    Randolf Menzel, Lars Chittka, Stefan Eichmüller, Karl Geiger, Dagmar Peitsch, Peter KnollRequires cookie*
 Title    Dominance of Celestial Cues over Landmarks Disproves Map-Like Orientation in Honey Bees  
  Reference    Z. Naturforsch. 45c, 723—726 (1990); received February 23 1990 
  Published    1990 
  Keywords    Compass Orientation, Cognitive M ap, Honey Bee, Landmarks 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0723.pdf 
 Identifier    ZNC-1990-45c-0723 
 Volume    45 
3Author    Heinz Rembold, Christian Czoppelt, GireeshK. SharmaRequires cookie*
 Title    Precocene II is no Anti-Juvenile Hormone in the Honey Bee, Apis mellifera  
 Abstract    The effect o f precocene II on development o f the honey bee, Apis mellifera, was studied in vitro. One-to two-day-old worker larvae (body weight 0.5 — 1.0 mg) were removed from the colonies, reared on royal jelly-yeast extract, and after 24 h were topically applied with different amounts (5 -75 |ig/larva) of precocene II. Toxicity was observed only with precocene doses o f 50 (ag/larva and more. The larval weight-gains declined with the increase o f doses. The acetone-treated control had better survival and weight-gain as compared to the no-treatment control. The larval and pu­ pal periods in the treated larvae remained unchanged as compared to the controls. The possibility of precocene acting as an antifeedant is discussed. 
  Reference    Z. Naturforsch. 34c, 1261—1263 (1979); received July 31 1979 
  Published    1979 
  Keywords    Precocene II, Anti-Juvenile Hormone, Honey Bee, Apis mellifera, Anti-Feedant 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-1261.pdf 
 Identifier    ZNC-1979-34c-1261 
 Volume    34 
4Author    G.Erhard PflughöftRequires cookie*
 Title    Zum Farbunterscheidungsvermögen der Honigbiene bei niedrigen Umgebungshelligkeiten Colour Discrim ination of the Honey Bee at Low Light Intensities  
 Abstract    Homing foragers of the honey bee (Apis mellifera carni-ca) were tested for discrim ination o f colour marks presen­ ted to them at the hive entrance. At a low rate o f natural il­ lum ination the bees were not able to distinguish the colou­ red (yellow, blue) marks from those with a corresponding gray. However, their general orientation was not disturbed. From this the conclusion is drawn that at low light intensi­ ties bees have an achrom atic vision besides their known co­ lour vision at higher intensities. 
  Reference    Z. Naturforsch. 35c, 1114—1116 (1980); received July 21/A ugust 26 1980 
  Published    1980 
  Keywords    Colour Vision, A chromatic Vision, Low Light Intensities, Honey Bee, Training Experiments 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-1114_n.pdf 
 Identifier    ZNC-1980-35c-1114_n 
 Volume    35