Temperature is a limiting factor in the distribution of many animals. The ova of brown trout (Salmo trutta) can develop without excessive mortality at water temperatures between 3 and 15° C. (Gray, 1928), while for adult trout, mortality is high above 20 and complete above 25 C. (Gardner & Leetham, 1914; Audige\ 1921; Gardner, 1926). It is generally assumed that temperature is the most importan...

JAVIER LOBÓN-CERVIÁ* , PHAEDRA BUDY AND ERIK MORTENSEN *Department of Evolutionary Ecology, National Museum of Natural Sciences (CSIC), Madrid, Spain Department of Watershed Sciences, Utah State University, Logan, UT, U.S.A. and U.S. Geological Survey, Utah Cooperative Fish and Wildlife Research Unit, Intermountain Center for River Rehabilitation and Restoration, Utah State University, Logan, U...

We applied the adaptive management approach to analyze the demand and feasibility of adaptive management of fish stocks in a large regulated lake, Oulujärvi, in northern Finland. The process consisted of four phases: (1) analysis of the current state of the fisheries system (fishers, related markets and industry, fisheries researches and authorities, related organizations, etc.); (2) analysis o...

Metabolic rates reflect the energetic cost of living but exhibit remarkable variation among conspecifics, partly as a result of the constraints imposed by environmental conditions. Metabolic rates are sensitive to changes in temperature and oxygen availability, but effects of food availability, particularly on maximum metabolic rates, are not well understood. Here, we show in brown trout (Salmo...

The reproductive characteristics of 2 brown trout (Salmo trutta) populations were examined in 2 tributaries, the Anuri and Cenker streams, of the Çoruh River, north-eastern Turkey. Sampling was carried out by electrofishing monthly from November 2000 to October 2002. Age varied from 0 to 6 in the Anuri Stream, and from 0 to 7 in the Cenker Stream. Fork length (L) ranges were 4.29-29.9 cm and 3....

A survey of trout species was carried out to assess the stocks' quality inhabiting Palena River Basin, one most important rivers for recreational angling in Chilean Patagonia. Six sampling campaigns were over 16 selected stretches river between February 2012 and June 2013. total 912 collected, 57% rainbow (Oncorhynchus mykiss), 33.3% brown (Salmo trutta), 9.6% brook (Salvelinus fontinalis). Als...

In this study, changes in malondialdehyde level (MDA), superoxide dismutase (SOD) and catalase (CAT) activity fish liver tissue were investigated by applying two doses of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide to Capoeta umbla for 72 hours. Changes MDA level, CAT SOD determined spectrophotometric methods. As a result the it was that there statistically significant increase C. exposed ...

Avoiding complementarity between primers when designing a PCR assay constitutes a central rule strongly anchored in the mind of the molecular scientist. 3'-complementarity will extend the primers during PCR elongation using one another as template, consequently disabling further possible involvement in traditional target amplification. However, a 5'-complementarity will leave the primers unchan...

Throughout its natural range, the brown trout Salmo trutta L. exhibits a complex pattern of morphological and life-history variation. This has led to considerable taxonomic confusion, hampering the understanding of the evolutionary history of the species. To document the phylogenetic relationships among morphologically and geographically remote brown trout populations across western Europe, we ...