EJE, vol. 102 (2005), issue 1
Variability along a latitudinal gradient in the chiasma frequency and morphological characters of Dichroplus pratensis (Orthoptera: Acrididae)
Claudio J. BIDAU, Dardo A. MARTÍ
Eur. J. Entomol. 102 (1): 1-12, 2005 | DOI: 10.14411/eje.2005.001
The grasshopper Dichroplus pratensis Bruner is polymorphic and polytypic for a complex Robertsonian system. In this species, centric fusions induce changes in number and position of chiasmata, and thus potentially affect intrachromosomal genetic recombination and genetic variability. Males and females, from 23 populations covering most of the geographic range of the species and spanning 22 degrees of latitude, were studied. We analyzed chiasma frequency in relation to variability in six exomorphological characters. The chromosomal polymorphisms of D. pratensis are widely geographically distributed, and show a central-marginal pattern,...
Gene cloning and sequencing of aminopeptidase N3, a putative receptor for Bacillus thuringiensis insecticidal Cry1Ac toxin in Helicoverpa armigera (Lepidoptera: Noctuidae)
Gui-Rong WANG, Ge-Mei LIANG, Kong-Ming WU, Yu-Yuan GUO
Eur. J. Entomol. 102 (1): 13-19, 2005 | DOI: 10.14411/eje.2005.002
A cDNA encoding aminopeptidase N3 was cloned by degenerated PCR and RACE techniques. The full-length of APN3harm is 3486bp. Open reading frame is 3042bp in length, encoding 1014 amino acid residues. Its predicted molecular weight and isoelectric point are 117.04 kDa and 5.14, respectively. This deduced amino acid sequence shares some common structural features with aminopeptidase N from Lepidoptera, including the consensus zinc-binding motif HEXXHX18E and the GAMEN motif common to gluzincin aminopeptidases. The full-length of the APN3harm gene from three susceptible and three resistant strains were cloned and sequenced. Comparison...
The role of 20-hydroxyecdysone in the CNS metamorphosis in flesh fly (Neobellieria bullata) larvae (Diptera: Sarcophagidae)
Petr MY©KA, Jan ®ÏÁREK
Eur. J. Entomol. 102 (1): 21-26, 2005 | DOI: 10.14411/eje.2005.003
The role of 20-hydroxyecdysone (20E) in the metamorphosis of the central nervous system was investigated by recording feeding, wandering and pupariation behaviour as the measures of hormonal effects on the neural tissues in the flesh fly Neobellieria (Sarcophaga) bullata. The minimum amount of food essential for the commitment to metamorphosis is rather small and constant and the larvae ingest it during the first 4 to12 h of the last instar. Underfed larvae maintain food appetency for a certain time and this period of hunger can be considerably shortened by the application of 20E. Application of 20E also significantly shortens...
Action of fenoxycarb on metamorphosis and cocoon spinning in Chrysoperla carnea (Neuroptera: Chrysopidae): identification of the JHA-sensitive period
Laura BORTOLOTTI, Anna MICCIARELLI SBRENNA, Giovanni SBRENNA
Eur. J. Entomol. 102 (1): 27-32, 2005 | DOI: 10.14411/eje.2005.004
Fenoxycarb is an insecticide with a juvenile hormone mimicking effect, which disturbs metamorphosis in several insect species, including the neuropteran Chrysoperla carnea. Administration of different doses of fenoxycarb to third instar larvae causes a dose dependent inhibition of metamorphosis and cocoon spinning. When treated within 48 h of the last larval ecdysis, this insect shows a temporary inhibition of metamorphosis and cocoon spinning, which leads to a prolongation of the third larval instar. When treated after 60 h into the last instar, most of larvae were unable to metamorphose and spin a cocoon. Thus, C. carnea is most sensitive...
Effects of different wavelengths of light on the life attributes of two aphidophagous ladybirds (Coleoptera: Coccinellidae)
OMKAR, Geetanjali MISHRA, Kalpana SINGH
Eur. J. Entomol. 102 (1): 33-37, 2005 | DOI: 10.14411/eje.2005.005
The effect of different wavelengths of light, white (control; broad spectrum), blue (ca. 475 nm), yellow (ca. 570 nm) and red (ca. 650 nm), at constant intensity (195 ± 5 lux) on developmental time, reproductive and non-reproductive periods, fecundity, egg viability, prey consumption and fitness of two aphidophagous ladybirds, Cheilomenes sexmaculata and Propylea dissecta were studied. Both ladybird species consumed most aphids, developed fastest and reproduced best when kept under white light, followed by yellow, blue and red light. Fitness of both the ladybirds was highest under white and lowest under red light. There were positive...
Abundance of mycophagous arthropods present on different species of fungi in relation to resource abundance at different spatial scales
Kazuo H. TAKAHASHI, Nobuko TUNO, Takashi KAGAYA
Eur. J. Entomol. 102 (1): 39-46, 2005 | DOI: 10.14411/eje.2005.006
The abundance of Coleoptera, Diptera and Collembola on different species of fungi was investigated in relation to the size and abundance of fungal resources at different spatial scales; i.e., the size of the fungal fruiting body, the quality of resource in terms of number of conspecific sporophores growing within a radius of 50 cm, crowding of the clumps of fruiting bodies, and the quality of resource within a plot (20 m × 30 m). Multiple linear regression analyses showed that the influential spatial scale varied among the arthropod orders. The amount of resource at the scale of a clump made a significant contribution to the abundance of Coleoptera,...
Habitat factors influencing the presence of adult Calopteryx splendens (Odonata: Zygoptera)
Louise WARD, Peter J. MILL
Eur. J. Entomol. 102 (1): 47-51, 2005 | DOI: 10.14411/eje.2005.007
1. In Great Britain the distribution of the riverine damselfly Calopteryx splendens is predominantly southern. However, the last decade has seen records of the species in previously unoccupied areas in the northeast of England, prompting speculation regarding northward range expansion. The current study is the first to quantify the physical features of the habitat that influence the presence of C. splendens.
2. A field survey was carried out on the physical characteristics of habitat supporting C. splendens along a section of the River Wharfe, West Yorkshire, U.K. Adult C. splendens were marked uniquely for individual...
Ecological and seasonal patterns in the diversity of a species-rich bee assemblage (Hymenoptera: Apoidea: Apiformes)
Sabine OERTLI, Andreas MÜLLER, Silvia DORN
Eur. J. Entomol. 102 (1): 53-63, 2005 | DOI: 10.14411/eje.2005.008
Meaningful ecological studies on insect communities require sampling protocols that take into consideration temporal fluctuations in abundance and species composition. Bees with their specific requirements for nutrition and nesting are good indicators of landscape structure and overall biodiversity, provided the ecological and seasonal patterns they show are taken into consideration. The present two year study traced the ecological and seasonal patterns on 2 km2 of a southern slope in the Swiss Alps, ranging from 1150 to 1550 m above sea level. The study area consisted mainly of grassland under different regimes, mostly hay meadows and pastures....
The composition of the arthropod fauna of the canopies of some species of oak (Quercus)
T. Richard E. SOUTHWOOD, G.R. William WINT, Catherine E.J. KENNEDY, Steve R. GREENWOOD
Eur. J. Entomol. 102 (1): 65-72, 2005 | DOI: 10.14411/eje.2005.009
1. A study was made by knockdown sampling and branch clipping of the arthropod fauna of the canopy of two native oak species (Quercus robur and Q. petraea) and of two introduced species (Q. cerris and Q. ilex ) in woods near Oxford, UK, and of two native species (Q. pubescens and Q. ilex) in southern France. Sampling was undertaken for five years in the UK and for four years in France. All the specimens from the UK, except Acarina, Collembola and Nematocera were identified to species or, occasionally, to morphotype.
2. In terms of overall numbers, species richness and biomass,...
Abundance of non-target pests in transgenic Bt-maize: A farm scale study
Xavier PONS, Belén LUMBIERRES, Carmen LÓPEZ, Ramon ALBAJES
Eur. J. Entomol. 102 (1): 73-79, 2005 | DOI: 10.14411/eje.2005.010
The impact of transgenic Bt-maize, expressing the Cry1Ab protein, on aphids, leafhoppers, cutworms and wireworms was evaluated at the farm scale by comparing their abundance on Bt-plots and those sown with the isogenic variety over three consecutive growing seasons. The impact of Bt-maize was different on each of the three-herbivore groups. There were significantly more aphids on the Bt-maize but in terms of aphid species, the difference was only statistically significant for Sitobion avenae and not for the other three most abundant species (Metopolophium dirhodum, Rhopalosiphum padi and Macrosiphum euphorbiae). The analysis...
Ultrastructural study of tergal and posterior sternal glands in Prorhinotermes simplex (Isoptera: Rhinotermitidae)
Jan ©OBOTNÍK, Franti¹ek WEYDA, Robert HANUS
Eur. J. Entomol. 102 (1): 81-88, 2005 | DOI: 10.14411/eje.2005.011
In Prorhinotermes simplex, tergal glands are present on the last three tergites (from the 8th to the 10th) in imagoes of both sexes. In addition, males possess posterior sternal glands of the same structure on sternites 8 and 9. The tergal and the posterior sternal glands consist of four cell types: class 1 and class 2 secretory cells, and class 3 cells with corresponding canal cells. The cytoplasm of class 1 cells contains smooth endoplasmic reticulum, elongated mitochondria and numerous microtubules. Apical parts of these cells are formed by dense and long microvilli with a central ductule. Class 2 cells contain predominantly lucent vacuoles...
Structure of the cuticle of some ptyctimine oribatids (Acari: Oribatida)
Eur. J. Entomol. 102 (1): 89-95, 2005 | DOI: 10.14411/eje.2005.012
Abstract. The cuticle of Rhysotritia duplicita (Euphtiracaroidea: Euphtiracaridae), Phthiracarus sp., Steganacarus magnus, S. striculus and Tropacarus carinatus (all Phthiracaroidea: Phthiracaridae) was studied by light and transmission electron microscopy. A combination of light and electron microscopy were used to precisely characterize and classify the cuticular layers in oribatid mites and show how they differe in mites and other arthropods. In Rhysotritia duplicata the cuticle of the aspis (upper shield of the prosoma) differs significantly from that of the opisthosoma. Moreover, prosomal cuticle in this...
BOOK REVIEW: Capinera J.L. (ed.): Encyclopedia of Entomology.
Eur. J. Entomol. 102 (1): 96, 2005 | DOI: 10.14411/eje.2005.013
Kluwer Academic Publishers, Dordrecht, 2004. Three volumes, 2580 pp.
Studies on the morphology of immature stages of the tribe Agathidiini (Coleoptera: Leiodidae). Part II. Anisotoma blanchardi
Eur. J. Entomol. 102 (1): 97-105, 2005 | DOI: 10.14411/eje.2005.014
The first and third larval stages of Nearctic Anisotoma blanchardi (Horn, 1880) are described in detail and figured for the first time; measurements and chaetotaxy of head, mouthparts, thorax, abdomen, leg and urogomphi are given. Larval morphology of the blanchardi group is discussed. The blanchardi species group, proposed after a study of adult characters, is very important phylogenetically because it is a basal group in the genus and sister group to all the remaining groups. Larval characters confirm the monophyly of the group. The common larval characters of the blanchardi species group are: (i) presence of primary...
BOOK REVIEW: Mason F., Nardi G. & Tisato M. (eds): Proceedings of the International Symposium "Dead wood: a key to biodiversity", Mantova, May 29th-31st 2003.
Eur. J. Entomol. 102 (1): 106, 2005 | DOI: 10.14411/eje.2005.015
Sherwood 95, Suppl. 2, Compagnia delle Foreste, Arezzo (Italy), 100 pp.
Eothalassius, a new genus of parathalassiine flies (Diptera: Empidoidea: Dolichopodidae) from Southeast Asia and Papua New Guinea
Igor V. SHAMSHEV, Patrick GROOTAERT
Eur. J. Entomol. 102 (1): 107-118, 2005 | DOI: 10.14411/eje.2005.016
A new genus of parathalassiine-like flies, Eothalassius gen. n., and two new species, Eothalassius platypalpus sp. n. (type species), E. gracilis sp. n., are described from the coasts of Southeast Asia and Papua New Guinea. The phylogenetic relationships of the new genus with other genera assigned to Parathalassiinae and Dolichopodidae are discussed.
Coprophagous hydrophilid beetles (Coleoptera: Hydrophilidae) as carriers of phoretic deutonymphs of Uropoda orbicularis (Acari: Mesostigmata) in Poland
Daria BAJERLEIN, Marek PRZEWO¬NY
Eur. J. Entomol. 102 (1): 119-122, 2005 | DOI: 10.14411/eje.2005.017
During a study 20 hydrophilid beetle species and 2,457 individuals of beetles belonging to 4 genera: Cercyon, Cryptopleurum, Megasternum and Sphaeridium were collected. On the surface of the bodies of 59 beetles (2.40% of the beetles collected) belonging to six species, 174 cases of phoresy [55 deutonymphs of Uropoda orbicularis (Müller, 1776) and 119 pedicels without deutonymphs] were observed. New hydrophilid beetle carriers of phoretic deutonymphs of U. orbicularis are given. Most mites were carried by Sphaeridium species. The population dynamics of both groups of arthropods was also studied....
BOOK REVIEW: Wachmann E., Melber A. & Deckert J.: Cimicomorpha: Microphysidae (Flechtenwanzen), Miridae (Weichwanzen). Neubearbeitung der Wanzen Deutschlands, Österreichs und der deutschsprachigen Schweiz. Die Tierwelt Dutschlands. Wanzen. Band 2 [in German].
Eur. J. Entomol. 102 (1): 123, 2005 | DOI: 10.14411/eje.2005.018
Goecke & Evers, Keltern, 2004, 288 pp., 266 colour photographs.
BOOK REVIEW: Braby M.F.: The Complete Field Guide to Butterflies of Australia.
J. JARO©, K. SPITZER
Eur. J. Entomol. 102 (1): 124, 2005 | DOI: 10.14411/eje.2005.019
CSIRO Publishing, Collingwood, VIC., 2004, 339 pp. (paperback).