Results 111 to 120 of about 75,432 (273)
River Research and Applications, EarlyView.ABSTRACT River managers are beginning to adopt natural capital approaches in practice. However, while it is crucial for river management, the link between river asset condition and the flow of ecosystem services is poorly understood. In this study, we conducted a Quick Scoping Review (QSR) of the research into river asset condition and ecosystem ...
Valentina Zini +7 more
wiley +1 more source
Scale‐dependence of fish habitat associations in a North American river system
Freshwater Biology, Volume 68, Issue 1, Page 12-24, January 2023., 2023 Abstract Determining the appropriate measurement scale to assess habitat variables is critical for ecologists assessing biological or ecological conditions. Depth, velocity, substrate, woody debris and other fish cover variables occur on both reach and microhabitat scales, and fish habitat associations with these variables may be scale‐dependent.
David H. Keller
wiley +1 more source
EFFECTS OF FREEZING ON IMPEDANCE OF RAINBOW TROUT (Oncorhynchus mykiss) [PDF]
Croatian Journal of Fisheries, 2011 The aim was to examine the electrical characteristics of rainbow trout (Oncorhynchus mykiss) fillets subjected to different freezing methods. Resistance (R) and reactance (X) were measured in the range from 1 Hz to 1MHz on 100 samples and recorded data ...
Sanja Vidaček +5 more
doaj
River Research and Applications, EarlyView.ABSTRACT The presence of excess fine‐grained matrix sediment in channel beds can exert an oxygen demand in this critical habitat for fish spawning and invertebrates. Therefore, reducing the oxygen demand of channel bed sediment through targeted intervention may deliver better cost–benefit from catchment management.
S. Pulley, C. Reigate, A. L. Collins
wiley +1 more source
Biological Journal of the Linnean Society, EarlyView., 2016 All examples of lake charr (Salvelinus namaycush) diversity occur within the largest, deepest lakes of North America (i.e. > 2000 km2). We report here Rush Lake (1.3 km2) as the first example of a small lake with two lake charr morphs (lean and huronicus). Morphology, diet, life history, and genetics were examined to demonstrate the existence of morphs
Louise Chavarie +9 more
wiley +1 more source
Egestion rates of microplastic fibres in fish scaled to in situ concentration and fish density
Freshwater Biology, Volume 68, Issue 1, Page 33-45, January 2023., 2023 Abstract Microplastics (particles <5 mm) are commonly found in aquatic organisms across taxonomic groups and ecosystems. However, the egestion rate of microplastics from aquatic organisms and how egestion rates compare to other rates of microplastic movement in the environment are sparsely documented.
Loren Hou +2 more
wiley +1 more source
Knowledge and Management of Aquatic Ecosystems, 1993 Le macrohabitat de reproduction de la truite commune (Salmo trutta L.) a été étudié sur la Neste du Louron, sur 61 faciès d'écoulement (pool, radier,...) distribués en 8 stations.
DELACOSTE M. +3 more
doaj +1 more source
Regulación de especies competitivas bajo modelos impulsivos de pesca-siembra regidos por operadores maximales [PDF]
arXiv, 2015 In this paper we consider a strategy based on the values of the left one-sided maximal Hardy-Littlewood operator to regulate the pulsating seeding of young fish in the case where two or more competitive species (eg perch and trout in lakes) interact; this strategy may occur as a natural from the point of view of those who propose seeding and also ...
arxiv
A Constructive Spatio-Temporal Approach to Modeling Spatial Covariance [PDF]
arXiv, 2015 I present an approach for modeling areal spatial covariance by considering the stationary distribution of a spatio-temporal Markov random walk. In the areal data case, this stationary distribution corresponds to an intrinsic simultaneous autoregressive (SAR) model for spatial correlation, and provides a principled approach to specifying areal spatial ...
arxiv