scholarly journals POPULATION DYNAMIC OF HONEYBEE (Apis mellifera L.) DISEASES IN UPPER EGYPT

2022 ◽  
Vol 4 (1) ◽  
pp. 32-38
Author(s):  
Mohamed Attala ◽  
Hosafy Eshbah ◽  
Abdelsalam Mohamed ◽  
Mahmoud Omar ◽  
Abdul Monem Ramadan
Keyword(s):  
Apis Mellifera ◽  
Population Dynamic ◽  
Upper Egypt

Differentiation Processes of the Ocellar Retina of the Honeybee (Apis Mellifera L.)

1990 ◽  
Vol 48 (3) ◽  
pp. 430-431
Author(s):  
Maria Anna Pabst
Keyword(s):  
Apis Mellifera ◽  
Distal Part ◽  
Cell Layer ◽  
Single Layer ◽  
Photoreceptor Cells ◽  
Distal Segment ◽  
Compound Eyes ◽  
Thin Sections ◽  
Ultrastructural Studies ◽  
Adult Worker

In addition to the compound eyes, honeybees have three dorsal ocelli on the vertex of the head. Each ocellus has about 800 elongated photoreceptor cells. They are paired and the distal segment of each pair bears densely packed microvilli forming together a platelike fused rhabdom. Beneath a common cuticular lens a single layer of corneagenous cells is present.Ultrastructural studies were made of the retina of praepupae, different pupal stages and adult worker bees by thin sections and freeze-etch preparations. In praepupae the ocellar anlage consists of a conical group of epidermal cells that differentiate to photoreceptor cells, glial cells and corneagenous cells. Some photoreceptor cells are already paired and show disarrayed microvilli with circularly ordered filaments inside. In ocelli of 2-day-old pupae, when a retinogenous and a lentinogenous cell layer can be clearly distinguished, cell membranes of the distal part of two photoreceptor cells begin to interdigitate with each other and so start to form the definitive microvilli. At the beginning the microvilli often occupy the whole width of the developing rhabdom (Fig. 1).

Benefits of performing learning flights in honeybees, Apis mellifera

2003 ◽  
Author(s):  
Cynthia A. Wei ◽  
Fred C. Dyer
Keyword(s):  
Apis Mellifera

Biodiversity, spatial distribution and seasonality of heterotrophic straminipiles and true zoosporic fungi in two water bodies exposed to different effluents at Assiut (Upper Egypt).

2020 ◽  
Vol 72 (1) ◽  
pp. 43-70
Author(s):  
Abdel-Raouf M. Khallil ◽  
Essam H. Ali ◽  
Elhagag A. Hassan ◽  
Sabreen S. Ibrahim
Keyword(s):  
Spatial Distribution ◽  
Water Bodies ◽  
Upper Egypt ◽  
Zoosporic Fungi

УГРОЗЫ РАСПРОСТРАНЕНИЯ ВИРУСНЫХ ИНФЕКЦИЙ У ПЧЕЛ (Apis mellifera L.) И РОЛЬ КЛЕЩА Varroa destructor В РАЗВИТИИ ПАТОЛОГИЙ

2016 ◽  
Vol 51 (2) ◽  
pp. 156-171
Author(s):  
А.В. СПРЫГИН ◽  
◽  
Ю.Ю. БАБИН ◽  
Е.М. ХАНБЕКОВА ◽  
Л.Е. РУБЦОВА ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Varroa Destructor
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