نتایج جستجو برای: ornamental fishes
تعداد نتایج: 24540 فیلتر نتایج به سال:
Formalin is a chemical disinfectant for surface and premises beside its effect on several infective pathogens in ornamental and food fishes. Determination of formalin concentration for precious fish is critical. This problem is so important because of the aquarium fish varieties. In this study, OECD standard method was used for Koi fish formalin LC50 assessment. After a series of basic experime...
In line with the growth of the aquaculture industry, the reproduction and cultivation of ornamental fish has developed significantly due to its high economic importance. One of the most important challenges in the aquaculture industry is the improvement of formulated diets to improve the growth efficiency, nutrition and immunity of fish. In recent years, many efforts have been made in connectio...
The present study examined women's attentional bias toward ornamental objects in relation to their menstrual phase as well as to motivations of intersexual courtship or intrasexual competition. In Experiment 1, 33 healthy heterosexual women were tested in a bias-assessment visual cuing task twice: once on a high-fertility day (during the ovulatory phase) and once on a low-fertility day (during ...
Bamboos were introduced into Europe from China and Japan in the early 1800s and their cultivation in parks and gardens became quite popular. The first records of scale insects on ornamental bamboos in Europe date to early in the XX century (i.e. Kuwanaspis pseudoleucaspis), but the presence of some species was unknown until recently due to their concealed habit (i.e. Balanococcus kwoni Pellizza...
this checklist aims to reviews and summarize the results of the systematic and zoogeographical research on the iranian inland ichthyofauna that has been carried out for more than 200 years. since the work of j.j. heckel (1846-1849), the number of valid species has increased significantly and the systematic status of many of the species has changed, and reorganization and updating of the publish...
Elaborate secondary sexual traits, such as the ornamental plumage of birds, may be favored by female choice because they serve as honest indicators of male quality. Elaborate traits are thought to be honest signals because they are expensive to produce and increase predation risk. Here we investigate another potential cost of elaborate traits, i.e., the time and energy required to maintain them...
The knowledge of nutritional requirements in ornamental fish species is essential to improve the productive development; however, the nutritional information of these species is scarce and sometimes this information is extrapolated from results obtained from nonornamental fish species. In ornamental fish, a correct formulation of the diet improve the nutrient digestibility and supply the metabo...
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