Elektronenmikroskopische untersuchungen an den Guanin-Speicherzellen von Araneus diadematus clerck (Araneae, Araneidae)

Zoomorphology ◽  
1972 ◽  
Vol 72 (3) ◽  
pp. 245-262 ◽  
Author(s):  
Karl -August Seitz
Keyword(s):  
Araneus Diadematus

scholarly journals Design features of the orb web of the spider, Araneus diadematus

1994 ◽  
Vol 5 (3) ◽  
pp. 280-287 ◽  
Author(s):  
Alun ap Rhisiart ◽  
Fritz Vollrath
Keyword(s):  
Design Features ◽  
Orb Web ◽  
Araneus Diadematus

The mechanical design of spider silks: from fibroin sequence to mechanical function

1999 ◽  
Vol 202 (23) ◽  
pp. 3295-3303 ◽  
Author(s):  
J.M. Gosline ◽  
P.A. Guerette ◽  
C.S. Ortlepp ◽  
K.N. Savage
Keyword(s):  
Mechanical Design ◽  
Polymer Network ◽  
Nephila Clavipes ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Clear Link ◽  
Silk Fibroins ◽  
Araneus Diadematus ◽  
Spider Silks ◽  
Β Sheet

Spiders produce a variety of silks, and the cloning of genes for silk fibroins reveals a clear link between protein sequence and structure-property relationships. The fibroins produced in the spider's major ampullate (MA) gland, which forms the dragline and web frame, contain multiple repeats of motifs that include an 8–10 residue long poly-alanine block and a 24–35 residue long glycine-rich block. When fibroins are spun into fibres, the poly-alanine blocks form (β)-sheet crystals that crosslink the fibroins into a polymer network with great stiffness, strength and toughness. As illustrated by a comparison of MA silks from Araneus diadematus and Nephila clavipes, variation in fibroin sequence and properties between spider species provides the opportunity to investigate the design of these remarkable biomaterials.

The effect of prey type on the geometry of the capture web of Araneus diadematus

1998 ◽  
Vol 85 (8) ◽  
pp. 391-394 ◽  
Author(s):  
Jutta M. Schneider ◽  
Fritz Vollrath
Keyword(s):  
Prey Type ◽  
Araneus Diadematus

Multiaxial anisotropy of spider (Araneus diadematus) cocoon silk fibres

Polymer ◽  
2001 ◽  
Vol 42 (13) ◽  
pp. 5797-5800 ◽  
Author(s):  
J.Y.J. Barghout ◽  
J.T. Czernuszka ◽  
C. Viney
Keyword(s):  
Araneus Diadematus

Regulation of external respiration by the book-lung spiracles of the spiders, Araneus diadematus Clerck and A. marmoreus Clerck

1969 ◽  
Vol 47 (3) ◽  
pp. 355-364 ◽  
Author(s):  
G. L. Robinson ◽  
U. Paim
Keyword(s):  
External Respiration ◽  
Continuous Release ◽  
Ambient Concentrations ◽  
Araneus Diadematus

Recordings were made of the movements of the valves of the book-lung spiracles of Araneus diadematus Clerck and A. marmoreus Clerck. The slit-like spiracles of quiescent spiders were usually almost closed, but opened widely whenever the spiders moved. Respirometry indicated that CO2, retained in the spiders while the spiracles were closed, was released in bursts when the spiracles opened. High ambient concentrations of CO2 as well as lack of O2 caused spiracular opening and continuous release of CO2 from the spiders. It is suggested that CO2 elicits, whereas O2 inhibits, spiracular opening.

scholarly journals On the Biological Regulators of Bloodsucking Blackflies(Diptera:Simuliidae) of Mixed Forests of Belorussian and Ukrainian Woodlands

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
V. M. Kaplich ◽  
E. B. Sukhomlin ◽  
O. P. Zinchenko
Keyword(s):  
Rana Temporaria ◽  
Rutilus Rutilus ◽  
Hirundo Rustica ◽  
Carassius Carassius ◽  
Insectivorous Birds ◽  
Mixed Forests ◽  
Scardinius Erythrophthalmus ◽  
Blood Sucking ◽  
Caddisfly Larvae ◽  
Araneus Diadematus

This article considers the natural regulators of blood-sucking Simuliidae subzone of mixed forests on the territory of Belarus and Ukraine. In the mixed forests, the major regulators of preimaginal phases of bloodsucking blackflies are microsporidia (Polidyspirenia simulii, Polidyspirenia sp., Thelohania fibrata, Amblyospora bracteata, A. varians), fungi and mermithides (Gastromermis boophthorae). Caddisfly larvae (Hydropsyche angustipennis, Neureclipsis bimaculata, Polycentropus flavomaculatus, Cyrnus flavidus, Oligostomis reticulata, Brachycentrus subnubilus and Rhyacophila nubila) and fishes (Scardinius erythrophthalmus, Rutilus rutilus, Carassius carassius, Gobio gobio) significantly reduce the number of blackflies larvae and pupae. Adult blackflies are eaten by spiders (Araneus diadematus) dragonflies, robberflies, wasps, frogs (Rana temporaria and Rana terrestris), and insectivorous birds (Delichon urbicum, Hirundo rustica, Apus apus). Bactolarvicid and BLP-2477 are among the most effective biological products.

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