نتایج جستجو برای: r rutilus

تعداد نتایج: 447746  

Journal: :Zootaxa 2014
Pier Giorgio Bianco Valerio Ketmaier

By combining morphology, ecology, biology, and biogeography with the available molecular (sequence variation of the entire mitochondrial cytochrome b gene; cyt-b) and karyology data, the taxonomy of several species of the Rutilus complex inhabiting southern Europe is revised. Rutilus stoumboudae, new species, is described from Lake Volvi, Greece. It differs from Rutilus rutilus in possessing mo...

2016
Zeynep Pekcan‐Hekim Noora Hellén Laura Härkönen Per Anders Nilsson Leena Nurminen Jukka Horppila

The coexistence of competing species relies on niche partitioning. Competitive exclusion is likely inevitable at high niche overlap, but such divide between competitors may be bridged if environmental circumstances displace competitor niches to enhance partitioning. Foraging-niche dimension can be influenced by environmental characteristics, and if competitors react differently to such conditio...

Journal: :caspian journal of environmental sciences 2011
m. sattari h. khara sh. nezami s. f. mirhasheminasab s. a. mousavi

the boojagh international wetland with a surface area of 80 hectares and 25 fish species is located in the southwest shores of the caspian sea (guilan province, iran), but there is no report about fish parasites in this wetland. in the present study, a total of 553 individuals of 8 fish species including cyprinus carpio (n=71), abramis bjoerkna (n=153), carassius auratus gibelio (n=89), esox lu...

2016
Ana Ruiz‐Navarro Phillipa K. Gillingham J. Robert Britton

Predictions of species responses to climate change often focus on distribution shifts, although responses can also include shifts in body sizes and population demographics. Here, shifts in the distributional ranges ('climate space'), body sizes (as maximum theoretical body sizes, L∞) and growth rates (as rate at which L∞ is reached, K) were predicted for five fishes of the Cyprinidae family in ...

Journal: :Journal of the American Mosquito Control Association 1986
B J Smittle D A Focks

Females and eggs of Toxorhynchites r. rutilus were labeled with 32P by feeding fourth-stage larvae 32P labeled Aedes aegypti larvae. Eggs from females up to 3 weeks in age had detectable levels of radioactivity and individual eggs contained ca. 0.3% of the mother's total radioactivity. Comparisons of labeled and unlabeled females in indoor and outdoor cage tests indicated that survival and fecu...

Journal: :Journal of evolutionary biology 2004
Raine Kortet Anssi Vainikka Markus J Rantala Janne Myntti Jouni Taskinen

According to the 'good genes' hypothesis, sexual ornaments provide an indication of the 'quality' of the bearer. In roach, Rutilus rutilus, breeding tubercles (BTs) may signal resistance against the digenean parasite, Rhipidocotyle campanula. Life history theory predicts that there should be a trade-off between parasite resistance and other life history traits. In roach, this could imply a trad...

H. Khara M. Ahmadnezhad M. Sattari, S. A. Mousavi S. F. Mirhasheminasab Sh. Nezami

The Boojagh international wetland with a surface area of 80 hectares and 25 fish species is located in the southwest shores of the Caspian Sea (Guilan province, Iran), but there is no report about fish parasites in this wetland. In the present study, a total of 553 individuals of 8 fish species including Cyprinus carpio (n=71), Abramis bjoerkna (n=153), Carassius auratus gibelio (n=89), Esox...

Journal: :nanomedicine journal 0
abdolreza jahanbakhshi department of fishery, faculty of fisheries and environment, gorgan university of agricultural science and natural resources, gorgan, iranسازمان اصلی تایید شده: دانشگاه گلستان (golestan university) aliakbar hedayati department of fishery, faculty of fisheries and environment, gorgan university of agricultural science and natural resources, gorgan, iranسازمان اصلی تایید شده: دانشگاه گلستان (golestan university) aref pirbeigi department of fishery, faculty of fisheries and environment, gorgan university of agricultural science and natural resources, gorgan, iranسازمان اصلی تایید شده: دانشگاه گلستان (golestan university)

objective(s):copper oxidenanoparticles have different industrial applications so it is inevitable that nanoparticulate products finally find their way into aquatic ecosystems. nevertheless there is little information available about their effects on some of edible fish. the present study aims to determine the acute toxicity and evaluate the effect of two sub-acute concentrations (50 and 70% 96 ...

2009
Leslie M. Smith Jarrod Blue Jessica Carlson Grace Metz Joshua Haywood Daniel Bush Christopher J. Paradise

The effects of predation on water-filled treehole communities in North Carolina were examined using mesocosm experiments and observations in natural treeholes. The presence of the predator Toxorhynchites rutilus and leaf litter abundance were manipulated in mesocosms to examine interactions between resources and predation. Long-term examination of interactions in unmanipulated treeholes provide...

Journal: :Journal of the American Mosquito Control Association 1999
J J Dennehy T Livdahl

The 1st recorded capture of Toxorhynchites rutilus in Massachusetts, USA, is reported. This capture represents the northernmost record of Tx. rutilus. The implications of this capture are discussed in the context of range expansion, evolution, and climatic change.

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