Romanian Journal of Biology - Zoology
ROMANIAN ACADEMY Institute of Biology - Bucharest
2007-2008, VOLUMES 52-53 (2008)
HEMIGASTERINI (HYMENOPTERA: ICHNEUMONIDAE: CRYPTINAE) NEW AND RARE FOR THE ROMANIAN FAUNA
IRINEL CONSTANTINEANU, RAOUL CONSTANTINEANU, CAMIL ŞTEFAN LUNGU-CONSTANTINEANU
In this paper the authors present 16 species of Ichneumonidae belonging to 7 genera of the tribe Hemigasterini, subfamily Cryptinae, collected from some ecosystems, especially protected areas, in different counties of Romania. The species Aptesis gravipes Grav. and Cubocephalus distinctor (Thunb.) are new for the Romanian fauna. The other species are rare or very rare for the Romanian fauna.
THE ORTHOPTERA (INSECTA: ORTHOPTERA) OF THE RAZELM-SINOE LAGOON COMPLEX (DANUBE DELTA BIOSPHERE RESERVATION, ROMANIA)
LAURA MARIANA PĂIŞ, IONUŢ ŞTEFAN IORGU
Our studies on Orthoptera diversity from 7 collecting sites in the Razelm-Sinoe Lagoon Complex revealed a number of 49 species. The most interesting taxa are Isophya dobrogensis, Saga campbelli gracilis and Gryllotalpa unispina. The species Isophya dobrogensis is endemic and can be found only on Popina Island.
SPREADING AND ECOLOGY OF MANAYUNKIA CASPICA ANNENKOVA, 1929 (POLYCHAETA: SABELLIDAE) IN ROMANIAN DANUBE STRETCH
Manayunkia caspica Annenkova, 1929, a Ponto-Caspian element, was found in the Danube zoobenthos between 1943–2002, along almost entire Romanian stretch: from Iron Gates up to a few kilometers close to the river mouth. It is a species which does not suffer wide salinity variations, being the most oxyphilic among the three Danube polychaetes, and prefers the stony facies. It was well developed at about 1 m/s water flow, in the Sulina and Sf. Gheorghe river branches, on right and left riparian zones, as well as between the riparian and navigable zone, while in the Lake Iron Gates II, on left riparian and navigable zone. The richest populations were revealed in the Lake Iron Gates II, in 2002, followed by those in Sulina and Sf. Gheorghe Danube branches, in 1958–1961.
Trophic elements regarding the non-indigenous Pseudorasbora parva (Schlegel, 1842) fish species spreading success - Olt River BASIN, a case study
ANGELA CURTEAN-BĂNĂDUC, DORU BĂNĂDUC
Pseudorasbora parva (Schlegel, 1842) is one of the accidentally introduced fish species in the Romanian Carpathians hydrographical net and its spreading speed is one of the highest in the regional fish fauna. This study results highlight some trophic elements (the broader ecologic niches; the highest degree trophic niches overlaping; the macroinvertebrate group with the highest relative abundance in the trophic supply and highest weight in the analyzed individuals; the macroinvertebrate groups number present in the trophic supply used as food by species) regarding this species competitive ecology in the native fish species communities context.
THE FRESHWATER PEARL MUSSEL (MARGARITIFERA MARGARITIFERA LINNÉ, 1758) IN UPPER AUSTRIA – A SPECIES THREATENED WITH EXTINCTION AND CURRENT MEASURES FOR ITS SUSTAINED PROTECTION
CHRISTIAN SCHEDER, CLEMENS GUMPINGER
The freshwater pearl mussel (Margaritifera margaritifera Linné, 1758) is one of the most threatened species in Austria. Once having occurred in the northern parts of Upper and Lower Austria in enormous densities, there are only some isolated scattered beds left nowadays, the largest ones not exceeding a few hundred mussels. Most populations lack juveniles, as the natural reproduction obviously does not work any more due to several reasons. The most important impairments comprise habitat loss for adults and juveniles, loss of appropriate host fish for the parasitic larvae, water pollution, climate change and, for the main part, the high fine sediment loads of the Austrian watercourses.
INTEGRATED PEST MANAGEMENT OF BYCTISCUS BETULAE LINNÉ, 1758 POPULATION (COLEOPTERA: RHYNCHITIDAE) IN ODOBEŞTI VINEYARD, VRANCEA COUNTY (ROMANIA)
IULIANA ANTONIE, IRINA TEODORESCU
In Romania, Byctiscus betulae (Linné, 1758) was for a long time mentioned only as a part of the fauna, without economic importance, but lately in some vineyard, their population’s outbreak has been noticed. Our investigations took place between 2000 and 2002, in the vineyard Odobeşti, Vrancea County. We analyzed the numeric abundance of the Byctiscus betulae adults and the “cigarettes” produced by their females from vine leaves, the female’s preference to lay its eggs on different vine sorts, the parasitic degree of the Byctiscus betulae eggs by the oophagous parasitoid Poropoea minkiewiczi Now. (Trichogrammatidae, Chalcidoidea, Hymenoptera). Based on the field and lab researches has been promoted a new approach to the integrated control of Byctiscus betulae pest populations. This approach emphasizes the integration of the agrophytotechnic methods (the selection and cultivation of sorts and hybrids of vine with any resistance against the pest attack), the soil works, some mechanic, physical and biological methods (oophagous parasitoid action).
NATURAL ENEMIES POPULATIONS MANAGEMENT, A TOOL FOR PEST POPULATION CONTROL
IRINA TEODORESCU, IULIANA ANTONIE
In our opinion, the management of the main natural enemy populations (dominant and efficient predators and specific parasitoids) is a good tool for the crops protection against the pest attack. Some measures to increase the natural enemy’s diversity, abundance, time persistence and, in consequence, efficient control of pest population are recommended. In this work our attention focused on finding good measures favourable for the natural enemies: unpolluted control methods applied, favourable surrounding habitats maintaining, poliniferous and nectariferous plants in association with crop plant or in proximity presence and abundance of anthophylous pollinator, coprophagous, necrophagous, detritophagous species, other species without direct trophic connection with the respective crop, which are alternatively host or prey from parasitoids and predators. Many other species as concurrent, commensal or mutual partners for the natural enemies or pests are important.
BIOCOENOTIC DIFFERENTIATION OF QUERCUS PETRAEA AND OF MIXED QUERCUS PETRAEA AND FAGUS SYLVATICA DECIDUOUS FORESTS FROM THE LOWER DOFTANA VALLEY (PRAHOVA COUNTY)
LILIANA VASILIU-OROMULU, MIHAELA PAUCǍ-COMĂNESCU, MARILENA ONETE, SANDA VASILE, CLAUDIA NICOLAE, ŞTEFǍNUŢ SORIN, DANIELA ŞINCU, VIORICA HONCIUC, MINODORA STǍNESCU, FALCǍ MARIN, CRISTINA FIERA, DORINA PURICE, SANDA MAICAN, CRISTINA MUNTEANU, MIHAELA ION
The forest biocoenoses belonging to the two plant associations:Querco petraeae – Carpinetum Soó et Pócs 1957 and Petraeo – Fagetum Scam./1956/1959, representative for the hill vegetation of the Doftana Valley, are characterised by a herbaceous layer dominated by many nemoral and poor acidophilous elements such as: Luzula luzuloides, Galium odoratum, Stellaria nemorum, Anemone nemorosa, Oxalis acetosella, Festuca drymeja, Mercurialis perennis, etc., with an annual dynamics of the herbaceous biomass differentiated mainly according to the underlying substrate. The tree layer, significant for the ecosystemic production, is modified by composition, the proportion of the species that form the density and the biomass. The biocoenotic components of the invertebrate fauna are different in the two forest ecosystems, revealing the role of the consumers and decomposers within the complex processes of matter transfer from these sites. The main purpose of the study was to reveal the spatial architecture of the natural forest biocoenoses and the way in which the biomass grows and accumulates at the level of the primary producers and how it is transferred to the secondary consumers.
ZINC ACTION UPON CYPRINUS CARPIO LINNÉ, 1758 (PISCES: TELEOSTEI) MEDIUM INTESTINE AND LIVER
MARIA NĂSTĂSESCU, VIORICA MANOLACHE, VIRGINIA POPESCU-MARINESCU, DANIELA TEODORESCU, LUMINIŢA NISTOR
Cyprinus carpio juvenile fishes were intoxicated with zinc 0.3 mg/l, 1mg/l and 1.5 mg/l during 24 h, 48 h, 96 h, 7 and 10 days. The structural changes of medium intestine and liver were investigated in optical microscopy. Such changes were more severe, as the dose and exposure duration increased. In the medium intestine, the modifications were remarked at high doses through damages more pronounced in enterocytes than in mucous cells. In the liver, the hepatocyte structural changes were stronger than in the intestine, but sometimes, we also found in such organ a cell capacity of regeneration.
CELL AND MOLECULAR ASPECTS OF THE DERMAL-EPIDERMAL INTERFACE DURING GOLDEN HAMSTER (MESOCRICETUS AURATUS) EMBRYO DEVELOPMENT
DORINA MIRANCEA, NICOLAE MIRANCEA
In this paper we report about the ultrastructural localization of the major molecular components of the dermal-epidermal junction zone during golden hamster (Mesocricetus auratus) ontogenesis. Here, we focused our interest on the spatialtemporal sequential detection of the hemidesmosomal molecular components located intracytoplasmic (plectin/HD1 and BPAG1, both linkers for cytoskeleton keratin filaments), transmembranar (BPAG 2 and ß4 chain of the α6ß4 integrin complex) and extracellular (laminin 5, type IV collagen and type VII collagen). During embryo development there is a successive appearance of each hemidesmosomal infrastructural elements as well as of the molecular components.
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