نتایج جستجو برای: conserving fish habitat

تعداد نتایج: 162848  

2011
Mark W. Rogers Micheal S. Allen

Developing quantitative ecosystem–scale expectations of habitat restoration projects and examining trade-offs associated with alternative approaches has been a challenge for restoration ecology. Many of the largest freshwater lake restoration projects have occurred in Florida to remediate degradation to vegetated littoral habitats resulting from stabilized water levels, but effects across lake ...

Journal: :Estuaries and Coasts 2022

Abstract Habitat complexity and connectivity can influence the number of species their diversity across a landscape. For surf zones ocean-exposed beaches, globally one longest habitat interfaces, assumed low structural complexity, apparent homogeneity, sandy seafloor habitats predicts taxonomic functional diversity. Here, we assessed how configuration seascape context different beach structure ...

2016
Laurane Winandy Pauline Legrand Mathieu Denoël

The spatial distribution of organisms in patchy environments can be determined by the relationship between habitat quality and animal behaviour. In species with complex life cycles, such as pond-breeding amphibians, the selection of a suitable wetland is crucial. While the traditional view of amphibian ecology suggests strong site fidelity and low vagility, more recent research highlights mecha...

Journal: :international journal of environmental research 2014
w. yao p. rutschmann s. bamal

quantification of the habitat available for fish species named rainbow trout (oncorhynchusmykiss) were evaluated in lees ferry, colorado river using water depth, water temperature, sediment transport,flow velocity in 2004 as environmental index. for the flow velocity and temperature distribution calculationsin the river, the navier-stokes equation and energy conservation equations with finite v...

2015
Johannes Radinger Christian Wolter Jochem Kail Judi Hewitt

Habitat suitability and the distinct mobility of species depict fundamental keys for explaining and understanding the distribution of river fishes. In recent years, comprehensive data on river hydromorphology has been mapped at spatial scales down to 100 m, potentially serving high resolution species-habitat models, e.g., for fish. However, the relative importance of specific hydromorphological...

2010
Ram Krishan Negi

The fish assemblage structure was analyzed in the streams of Kumaon Himalaya of Uttarkhand State, India. Seven sites were sampled by using different fishing gears during Jan, 2007 to December 2008. The physical features like stream habitat, stream classifications, fish assemblage at different sites, habitat preference and riparian vegetations were registered for each site. In the present invest...

Journal: :Journal of Applied Ecology 2022

While estuaries are considered valuable nurseries for many harvested fish species, little quantitative data exist about the spatial scales over which supply individuals to coastal reefs and how this influences metapopulations. Quantifying connectivity between will assist sustainable management of fisheries key habitat. This information is particularly pertinent considering world-wide experienci...

2000
Gregory B. Stewart

The Instream Flow Incremental Methodology (IFIM) and the Physical Habitat Simulation System (PHABSIM) are commonly used in the instream flow water allocation process. This methodology is based on the premise that physical habitat plays a major role in structuring fish populations and that physical habitat can be described through modeling of rivers. PHABSIM is a series of programs designed to c...

2018
Janina Seemann Alexandra Yingst Rick D. Stuart-Smith Graham J. Edgar Andrew H. Altieri

Fish communities associated with coral reefs worldwide are threatened by habitat degradation and overexploitation. We assessed coral reefs, mangrove fringes, and seagrass meadows on the Caribbean coast of Panama to explore the influences of their proximity to one another, habitat cover, and environmental characteristics in sustaining biomass, species richness and trophic structure of fish commu...

M. Zamani Faradonbe S. Eagderi

The relationship between some habitat factors and fish assemblage was analyzed in the Taleghan River, Alborz Province, Iran. Fish specimens from thirty-three sites were sampled by electrofishing device in October 2014. The habitat parameters, including elevation (m), water depth (cm), river width (m), river slope (%), current velocity (m.s-1), number of large stone (> 15 cm), average stone diam...

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