نتایج جستجو برای: perch
تعداد نتایج: 1712 فیلتر نتایج به سال:
An experiment was conducted over a period of 150 days at Can Tho, Vietnam to adapt integrated cage-cum-pond systems to local conditions in Vietnam, to determine appropriate stocking density of selected fish species in cages, to assess growth and production of fishes in both cages and open ponds, and to assess the economic and environmental benefits of this integrated system. Nile tilapia (Oreoc...
Although it has been reported that adult yellow perch (Perca flavescens) chronically exposed to metals in the environment exhibit endocrine impairment characterized by blunted cortisol secretion, little is known about the vulnerability of early life stages. Young-of-the-year (YOY) and 1+ yellow perch were captured, subjected to a standardized stress test or adrenocorticotropic-hormone stimulati...
To explore the feeding ecology of the Pfiesteria-like dinoflagellate (PLD) Luciella masanensis (GenBank Accession no. AM050344, previously Lucy), we investigated the feeding behavior and the kinds of prey species that L. masanensis fed on and determined its growth and ingestion rates of L. masanensis when it fed on the dinoflagellate Amphidinium carterae and an unidentified cryptophyte species ...
three complete cdnas encoding different forms of vitellogenin (vtg) were cloned from a white perch (Morone americana) liver cdna library. the two longest cdnas encoded Vtgs with a complete suite of yolk protein domains that, based on comparisons with vtg sequences from other species, were categorized as Vtgaa and Vtgab. the shorter cdna encoded a Vtg that lacked a phosvitin domain, had a shorte...
Flow-through toxicity tests were conducted on common freshwater fishes: rainbow trout (Oncorhynchus mykiss), three-spined stickleback (Gasterosteus aculeatus), roach (Rutilus rutilus), perch (Perca fluviatilis) and dace (Leuciscus leuciscus), to estimate their sensitivity to acute toxicity of nickel. The 96-hour median lethal concentration (96-hour LC50) values obtained from the tests ranged fr...
Background Worldwide, lower respiratory infections (LRIs) are the most frequent cause of death in children under 5 years. The Pneumonia Etiology Research for Child Health (PERCH) project is a large, multi-center case-control study of hospitalized pediatric patients with severe LRI to determine the etiology and risk factors associated with the syndrome. By applying modern tools with standardized...
One of the keys for an optimal Eurasian perch aquaculture broodstock management is being able to determine sex individuals. For perch, compared with other methods identification fish and according 3R principle (replacement, reduction refinement), ultrasonography a rapid, non-lethal, non-invasive accurate method. During two successive experiments, we used ultrasound identify gender immature broo...
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