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1.
Int J Parasitol Parasites Wildl ; 12: 165-171, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32577376

RESUMO

Five species of the subfamily Clinocerinae from the Tatra Mountains (S Poland) were observed to be parasitized by larval water mites. Two of them: Kowarzia plectrum Mik, 1880 and Clinocera storchi Mik, 1880 are recorded from this massif for the first time. In addition, C. storchi, is new for Polish fauna. The most infected species was Clinocera appendiculata Zetterstedt, 1838, following by Wiedemannia mikiana (Bezzi, 1899), Clinocera storchi Mik, 1880, Kowarzia plectrum Mik, 1880 and Wiedemannia jazdzewski Niesiolowski, 1987. The highest number of hosts occurred in the case of Panisopsis curvifrons (Walter, 1907) with five host species, following by both Hydrovolzia placophora (Monti, 1905) and Protzia eximia (Protz, 1896) with one species each. In the case of Clinocera appendiculata more parasites were recorded on males than on females and in C. storchi more parasites were recorded on females. The abdomen of the hosts was the most often chosen by water mites larvae.

2.
Foods ; 9(6)2020 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-32503124

RESUMO

The objective of the present study is to determine the differences between the mineral content of various organs of Helix vladika and H. secernenda, the two most abundant edible snail species in Montenegro. The bioaccumulation of 12 examined elements (zinc, manganese, copper, aluminum, cadmium, lead, nickel, iron, chromium, lithium, selenium and mercury) was determined in the hepatopancreas, albumen gland, digestive tract, reproductive system, mantle, foot and shell from three sampling sites (Biogradska Gora, Niksic and Malesija). The examined populations of H. vladika and H. secernenda showed a significant difference in their lithium and selenium contents. The levels of the most examined metals (Zn, Mn, Cu, Al, Cd, Pb, Se and Hg) varied significantly among organs. The digestive tract and hepatopancreas tend to bioaccumulate selenium and cadmium. The general mean concentration of cadmium in the examined snail tissues exceeded the maximum allowable level at the Biogradska Gora and Malesija sites. Therefore, the use of the Montenegrin edible snails collected from the wilderness for human consumption seems to be limited by their higher bioaccumulation capacity for toxic elements such as cadmium.

3.
Zootaxa ; 4585(3): zootaxa.4585.3.6, 2019 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-31716158

RESUMO

This paper provides a current overview of the diversity of the marine water mite family Pontarachnidae of the Mediterranean Sea. The checklist includes ten species from two genera, i.e. Litarachna Walter, 1925 and Pontarachna Philippi, 1840. Two species i.e., Litarachna muratsezgini sp. nov. and Pontarachna turcica sp. nov. from the Gulf of Antalya (Levantine Sea, Turkey), are described as new for science. Moreover, the key for the identification of Mediterranean Pontarachnidae species and a brief discussion on the current gaps and future prospects of our knowledge of this important but neglected component of the marine meiofauna are given.


Assuntos
Gastrópodes , Ácaros , Animais , Mar Mediterrâneo , Turquia , Água
4.
Zookeys ; 865: 31-38, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31379442

RESUMO

The larvae of water mites of the genus Hydrachna parasitise water bugs and water beetles. Larvae of the genus Hydrachna attach to the thorax and abdomen sternites and tergites under the elytra. Up to now six species of Hydrachna were recorded from Iran, but there are no records on larvae parasitising on water beetles. There is some information about parasitising of Hydrachna on water beetles from the genus Eretes, which is very well adapted to dry climate. The aim of this paper is to describe the morphology of an unknown larva of the genus Hydrachna, found on Eretesgriseus.

5.
Exp Appl Acarol ; 77(4): 471-486, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31011882

RESUMO

Springs are often recognized as biodiversity hotspots on the regional scale but at the same time they are among the most endangered freshwater habitats. Water mites are among the aquatic animal groups with highest share of crenobiotic (= spring-dwelling) species and, therefore, are possibly the best indicators of the ecological status of spring habitats. We studied water mites and environmental factors correlated with their distribution pattern along a eucrenon-hypocrenon gradient. The sampling was conducted in 14 karstic springs located in the Mediterranean part of Montenegro. We collected 17 water mite species of which four species were crenobiotic. We did not find significant differences between the water mite assemblages from the source and springbrook. Similarly, there were no significant differences in number of species and abundance between the studied spring sections, neither for crenobiotic taxa nor for non-crenobiotic taxa. We found that the number of non-crenobiotic taxa was predicted mainly by water depth, whereas the abundance of crenobionts was most strongly associated with temperature. No significant predictors for the number of crenobiotic species in spring habitats were found. Our results revealed also that distance from the nearby water body was the main driver of the crenobiotic species abundance in eucrenon suggesting the large effects of the local flooding events on crenobiotic species. Water mites may help in assessing the response of crenobiotic assemblages in those spring habitats which likely to be flooded in future as the results of ongoing climatic changes.


Assuntos
Distribuição Animal , Ácaros/fisiologia , Nascentes Naturais , Animais , Biota , Montenegro
6.
PeerJ ; 7: e6282, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30697485

RESUMO

Background: Conventional river engineering operations have a substantial influence on the fluvial ecosystem. Regulation and channelization generally reduce the physical heterogeneity of river beds and banks and the heterogeneity of habitats. They determine the character, diversity and species richness of plant communities. The effect of river regulation on vegetation has been repeatedly investigated, but few studies have been conducted within reaches of previously regulated rivers. The aim of this work is to expand and current knowledge about the impact of dredging on the vegetation of a regulated section of a lowland river. Materials & Methods: The study included pre-dredging (1 year before) and post-dredging surveys (results 1 and 2 years after dredging). The vegetation was analysed in terms of species composition, origin of species, life forms, distribution of Grime's life strategies, and selected ecological factors. The Shannon-Wiener biodiversity index (H) and evenness were also analysed in each year of the study. The impact of dredging on the vascular flora was assessed by 'before-after-control-impact' (BACI) analysis. Results: The number of species and biodiversity as measured by the Shannon-Wiener index (H) increased in the analysed section of the river valley. However, enrichment of the flora was observed only on the floodplain, on the surface of the deposited dredging material, while the number of species in the river channel decreased, as dredging of the river bed and levelling of the banks had markedly reduced habitat diversity. Although species richness in the second year after the dredging approached the values recorded before the intervention, the absence of particularly species or phytocenoses associated with shallow river banks and sandbars was still observed. The change in habitat conditions and the destruction of the vegetation cover during the dredging enabled penetration by numerous previously unrecorded alien species of plants and apophytes. There was a perceptible increase in the role of therophytes in the flora. It is worth noting that the number of alien species and therophytes declined significantly in the second year after the dredging. Analysis of the proportions of species representing various life strategies showed that previously unrecorded species with the type R (ruderal) life strategy had appeared, representing by pioneer species occurring in frequently disturbed habitats. There was also a marked increase in the share of species representing the mixed C-R (competitive-ruderal) strategy, occurring in habitats with low levels of stress, whose competitive abilities are limited by repeated disturbances. By the second year after the dredging, however, these changes were largely no longer observed. Conclusions: Through appropriate maintenance of the regulated river, it can be rapidly recolonized by vegetation after the procedure, but it may lead to the loss of some species and phytocoenoses.

7.
PeerJ ; 6: e5662, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30280034

RESUMO

Dystrophic lakes undergo natural disharmonic succession, in the course of which an increasingly complex and diverse, mosaic-like pattern of habitats evolves. In the final seral stage, the most important role is played by a spreading Sphagnum mat, which gradually reduces the lake's open water surface area. Long-term transformations in the primary structure of lakes cause changes in the structure of lake-dwelling fauna assemblages. Knowledge of the succession mechanisms in lake fauna is essential for proper lake management. The use of fractal concepts helps to explain the character of fauna in relation to other aspects of the changing complexity of habitats. Our 12-year-long study into the succession of water beetles has covered habitats of 40 selected lakes which are diverse in terms of the fractal dimension. The taxonomic diversity and density of lake beetles increase parallel to an increase in the fractal dimension. An in-depth analysis of the fractal structure proved to be helpful in explaining the directional changes in fauna induced by the natural succession of lakes. Negative correlations appear between the body size and abundance. An increase in the density of beetles within the higher dimension fractals is counterbalanced by a change in the size of individual organisms. As a result, the biomass is constant, regardless of the fractal dimension.

8.
Zootaxa ; 4457(3): 415-430, 2018 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-30314157

RESUMO

Based on published records and original data, a list of the epibiont suctorian and peritrich ciliates (Ciliophora) on halacarid and hydrachnid mites is presented. Altogether 13 suctorian and 10 peritrich species from hydrachnid and halacarid mites were listed. From this list, six suctorian and one peritrich species have been reported from halacarid mites, while four suctorian and four peritrich species were found on hydrachnid mites determined up to species level. The remaining specimens were determined upto the generic level. The halacarid and hydrachnid species do not share any suctorian and peritrich species and some of the ciliate species are specific to certain taxonomic groups of the hosts.The host specificity of both suctorian and peritrich ciliates, localization on the host body and environment are discussed. Some ciliate species specific to hydrachnid mites prefer lotic or lentic habitats. In most cases, both suctorian and peritrich ciliates prefer only marine or only fresh water bodies. It was also mentioned that both suctorian and peritrich ciliates have not distinct preferences in localization on their host body.


Assuntos
Cilióforos , Ácaros , Animais , Ecossistema , Água Doce
9.
Zootaxa ; 4457(2): 346-350, 2018 Aug 08.
Artigo em Inglês | MEDLINE | ID: mdl-30314177

RESUMO

Majumderatax was originally established by Vidrine (1993) as a subgenus of Unionicola Haldeman, 1842 with U. hankoi Szalay, 1927 as type species. It is probably a monophyletic clade (Gerecke et al. 2016), characterized by the following features: (i) I-L-5 with a characteristic, blade-like distoventral seta, and (ii) P-5 short and stocky, with a strong, bifurcated claw.


Assuntos
Ácaros , Animais , Sri Lanka , Água
10.
PeerJ ; 6: e4797, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29844962

RESUMO

This paper examines the impact of disturbance factors-flooding and intermittency-on the distribution of water mites in the riparian springs situated in the valley of a small lowland river, the Krapiel. The landscape factors and physicochemical parameters of the water were analysed in order to gain an understanding of the pattern of water mite assemblages in the riparian springs. Three limnological types of springs were examined (helocrenes, limnocrenes and rheocrenes) along the whole course of the river and a total of 35 water mite species were found. Our study shows that flooding influences spring assemblages, causing a decrease in crenobiontic water mites in flooded springs. The impact of intermittency resulted in a high percentage of species typical of temporary water bodies. Surprisingly, the study revealed the positive impact of the anthropogenic transformation of the river valley: preventing the riparian springs from flooding enhances the diversity of crenobiontic species in non-flooded springs. In the conclusion, our study revealed that further conservation strategies for the protection of the riparian springs along large rivers would take into account ongoing climatic changes and possible the positive impact of the anthropogenic transformation of river valleys.

11.
Zookeys ; (738): 89-96, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29670424

RESUMO

Larvae of water mite Hydrachna processifera Piersig, 1895 (Acari, Hydrachnidiae) were reported on diving beetles Dytiscus marginalis Linnaeus, 1758 (Coleoptera, Dytiscidae) from Turkey. The redescription of the larva was made. Earlier, the larva H. processifera was described as H. inermis, but it was subsequently synonymized with H. processifera. The larva of H. processifera is a new record for the Turkish fauna. All larvae of H. processifera were found on the mesosternum of the one specimens (prevalence = 16.7%).

12.
Zootaxa ; 4394(2): 151-184, 2018 Mar 13.
Artigo em Inglês | MEDLINE | ID: mdl-29690368

RESUMO

The last checklist of the water mites of the Balkan countries published in 2010 by Pesic et al. is updated to November 2017. This supplement includes new records of water mite species from the Balkan countries (Croatia, Bosnia Herzegovina, Montenegro, Albania, Macedonia, Serbia, Bulgaria and Greece) published after 2010, as well as unpublished records based on material collected from Croatia, Montenegro, Albania, Macedonia, and Greece. Numerous new records for the national faunas, including one species new for the Mediterranean region (Arrenurus stjordalensis Thor, 1899), are reported and one species new to science (Trichothyas jadrankae Pesic sp. nov.) is described. With these additions, a total number of 390 water mite species and subspecies from 34 families and 77 genera is now recorded from the Balkan peninsula (including the Greek Islands).


Assuntos
Ácaros , Albânia , Animais , Península Balcânica , Bósnia e Herzegóvina , Bulgária , Croácia , Grécia , Montenegro , Sérvia , Água
13.
Exp Appl Acarol ; 74(3): 283-289, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29504065

RESUMO

Little research has been done on egg diapause and the embryonic development of water mites. The aim of this study was to check the impact of temperature and periods of light on hatching of larvae of Eylais extendens. Three batches of eggs which were spawned on 30 July were placed at one of three temperatures (4, 10 and 20 °C) and two periods of light (7 and 14 h per day). Egg hatching (both, percentage of hatched larvae and rate of hatching) was found to differ between 4 versus 10 °C and between 4 versus 20 °C, but not between 10 versus 20 °C. The periods of light had no influence on hatching. This synchronization of hatching, enabling the eggs to emerge from diapause in the spring, could be considered an evolutionary adaptation aimed at postponing hatching of late-spawned eggs until a time allowing for completion of the full development cycle, including the parasitic larval stage.


Assuntos
Diapausa , Ácaros/fisiologia , Óvulo/fisiologia , Fotoperíodo , Temperatura , Animais , Larva/crescimento & desenvolvimento , Ácaros/crescimento & desenvolvimento , Reprodução
14.
Acta Parasitol ; 62(1): 38-45, 2017 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-28030346

RESUMO

The relationships between water mite larvae parasitizing Coenagrion scitulum in core and edge populations were described. A total of 636 larvae of 7 water mite species were found on 143 C. scitulum adults (82 females and 61 males). C. scitulum was recorded for the first time as a host species for Arrenurus cuspidator, A. bruzelii, A. bicuspidator, A. tricuspidator, A. claviger and Hydryphantes octoporus. The degree of infestation by particular parasite species was typical for these species. In contrast, the parasites' preferences for host body parts were not typical, as they preferred abdominal segments 2-4, which in earlier studies had been avoided by water mite larvae. No differences were found in degree of infestation of Coenagrion scitulum individuals between core and edge populations, with the exception of Hydryphantes octoporus, which parasitized damselflies only in core populations.


Assuntos
Insetos/parasitologia , Ácaros/fisiologia , Animais , Feminino , Interações Hospedeiro-Parasita , Larva/fisiologia , Masculino
15.
Acta Parasitol ; 60(2): 196-9, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26203985

RESUMO

During the studies on ecology of Trichoptera of anthropogenic water bodies we have unexpectedly discovered the parasitic larvae of water mites of the species Tiphys torris on the pupa of Triaenodes bicolor. This is the first documented case of the parasitism of water mites on the caddisfly pupa as well as the first ever record of the species which is regarded as a dipteran parasite on caddisflies. The situation is very untypical for preimaginal stages of caddisflies are used by phoretic and not parasitic water mite larvae. Parasitism has been confirmed in this case by the formation of stylostomes and enlarged sizes of the bodies of the larvae. This is probably the case of facultative parasitism in which the pupa has served as a substitute of the adult form of a caddisfly.


Assuntos
Ácaros e Carrapatos/crescimento & desenvolvimento , Insetos/parasitologia , Ácaros e Carrapatos/classificação , Animais , Interações Hospedeiro-Parasita , Microscopia , Pupa/parasitologia , Água
16.
Acta Parasitol ; 58(4): 486-95, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24338309

RESUMO

Larvae of a vast majority of water mite species are parasites of aquatic insects. Owing to this, they migrate to new localities, and are able to survive unfavourable environmental conditions. This also concerns species from subgenus Arrenurus s. str., parasites of dragonflies. The detailed analysis of this phenomenon, however, has only been possible in the last several years, since the key to the identification of larvae from genus Arrenurus Dug. was published. In 2010, the parasitism of Arrenurus s. str. larvae on dragonflies in the Lake Swidwie reserve (NW Poland) was analysed. Larvae of 9 species of water mites were recorded on 107 imagines of dragonflies from 8 species. The following were identified as hosts of water mites for the first time: Anax imperator, Libellula quadrimaculata, and Leucorrhinia caudalis. The highest prevalence occurred in the case of: Erythromma najas and Lestes dryas (100%), Coenagrion pulchellum (96.5%), and C. puella (80.0%). Coenagrion pulchellum was infested by 9 species of parasites, C. puella by 6, and Erythromma najas and Lestes dryas by three species. The highest number of host species occurred in the case of Arrenurus maculator (5); followed by A. cuspidator, A. batillifer cf., A. bicuspidator, and A. tetracyphus (3 each); A. papillator, A. tricuspidator, and A. bruzelii (2 each), and A. claviger (1). Differentiation of preferences of particular parasites towards various parts of the host body was observed, probably related to the coevolution of parasites and hosts, and competition between the host species. The body sizes of the parasites suggest that approximately 50% of body size growth of water mites from subgenus Arrenurus s. str. occurs at the stage of parasitic larva.


Assuntos
Ácaros e Carrapatos/crescimento & desenvolvimento , Odonatos/parasitologia , Animais , Feminino , Lagos , Larva/crescimento & desenvolvimento , Polônia
17.
Acta Parasitol ; 58(1): 57-63, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23377913

RESUMO

Many aquatic insect species, including aquatic Hemiptera, are parasitized by water mite larvae. Although this situation may cause damaging impacts to the hosts, the mites can disperse and colonize new localities in this way. Little is known about the frequency of water mite ectoparasitism amongst the aquatic Hemiptera in Turkey. In this study, larval water mite parasitism on aquatic Hemiptera, which have been collected from different localities in Turkish Thrace, was evaluated. It was found that only nine individuals, belonging two different species in a total of 367 hemipteran specimens, were parasitized by larval water mites. Furthermore, variations in sizes and shapes of the mites on the waterscorpion Ranatra linearis Linne, 1758 and Nepa cinerea Linne, 1758 were determined. These are the first records for larval mite parasitism on R. linearis and N. cinerea in Turkish Thrace.


Assuntos
Hemípteros/parasitologia , Ácaros/classificação , Ácaros/fisiologia , Animais , Interações Hospedeiro-Parasita , Larva , Turquia
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