نتایج جستجو برای: Permocalculus minutus
تعداد نتایج: 495 فیلتر نتایج به سال:
مطالعات ریزدیرینه‌شناسی سیستماتیک انجام شده روی توالیهای کربناته سازند تیرگان در برش‌های چینه‌شناسی باختر روستای طاهرآباد و یال جنوبی تاقدیس اشلیر در خاور حوضه رسوبی کپهداغ، به شناسایی جنس و گونه‌های متنوعی متعلق به خانوادههای Dasycladaceae، Triploporellaceae، Udoteaceae، Solenoporaceae و Gymnocodiaceae از جلبک‌های آهکی و نیز نمونههایی متعلق به ریزمرجانیان راسته Gorgonacea انجامیده است. در...
Species distributed across vast continental areas and across major biomes provide unique model systems for studies of biotic diversification, yet also constitute daunting financial, logistic and political challenges for data collection across such regions. The tree frog Dendropsophus minutus (Anura: Hylidae) is a nominal species, continentally distributed in South America, that may represent a ...
New records of the harvest mouse (Micromys minutus) were obtained for first time from mapping square 5741 in Karlovy Vary Region. The individuals collected during a faunistic survey small mammals 2016–2020. In total, 13 specimens Micromys minutus found at three sites (Jindřichovice v Krušných horách, Háj u Jindřichovic, Lomnice Sokolova).
Acanthocephalan parasites are known to alter the reproductive biology and physiology of their hosts in various ways. In this study we investigated the influence of two acanthocephalan parasites, Pomphorhynchus laevis and Polymorphus minutus, on the fecundity and pairing success of female Gammarus pulex. The results show that P. laevis and P. minutus affect female intermediate host reproduction ...
We investigated the influence of the acanthocephalan parasite Polymorphus minutus on the mortality of its intermediate host, Gammarus roeseli, exposed to cadmium, by the measure of LC(50-96h) values as well as the bioaccumulation of cadmium both in the host and in its parasite. LC(50) results revealed that infected G. roeseli males died less under cadmium stress than uninfected ones; while the ...
The objective was to examine fiber capillarization in relation to fiber mitochondrial volume in the highly aerobic diaphragm of the shrew, the smallest mammal. The diaphragms of four common shrews [Sorex araneus; body mass, 8.2 +/- 1.3 (SE) g] and four lesser shrews (Sorex minutus, 2.6 +/- 0.1 g) were perfusion fixed in situ, processed for electron microscopy, and analyzed by morphometry. Capil...
The acanthocephalan parasite Polymorphus minutus is a manipulator of its intermediate host Gammarus roeseli, which favours its transmission to the final host, a water bird. In contaminated environments, G. roeseli have to cope with two stresses, i.e. P. minutus infection and pollutants. As P. minutus survival relies on its host's survival, we investigated the influence of P. minutus on the anti...
Recently, the lineage hTURDUS2 of Haemoproteus minutus (Haemosporida, Haemoproteidae) was reported to cause mortality in captive parrots. This parasite lineage is widespread and prevalent in the blackbird Turdus merula throughout its entire distribution range. Species identity of other closely related lineages recently reported in dead parrots remains unclear, but will be important to determine...
Anthropogenic habitat disturbance can often lead to rapid evolution of environmental tolerances in taxa that are able to withstand the stressor. What we do not understand, however, is how species respond when the stressor no longer exists, especially across landscapes and over a considerable length of time. Once anthropogenic disturbance is removed and if there is an ecological trade-off associ...
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