نتایج جستجو برای: conserving fish habitat

تعداد نتایج: 162848  

Journal: :international journal of aquatic biology 0
melahat hoghoghi biodiversity department, environment faculty, islamic azad university, science and research branch, tehran, iran. soheil eagderi fisheries department, natural resources faculty, university of tehran, karaj, iran. bahmen shams-esfandabad department of environment, islamic azad university, arak branch, arak, iran.

a fish species prefer a particular habitat where provides its biological requirements, hence, understanding their habitat use and preferences are crucial for their effective management and protection. this study was conducted to assess the habitat use and selection patterns of alburnoides namaki , an endemic fish in jajroud river, namak lake basin, iran. the river was sampled at 18 equally spac...

2017
Jacob V E Katz Carson Jeffres J Louise Conrad Ted R Sommer Joshua Martinez Steve Brumbaugh Nicholas Corline Peter B Moyle

When inundated by floodwaters, river floodplains provide critical habitat for many species of fish and wildlife, but many river valleys have been extensively leveed and floodplain wetlands drained for flood control and agriculture. In the Central Valley of California, USA, where less than 5% of floodplain wetland habitats remain, a critical conservation question is how can farmland occupying th...

2017
Nerea Lezama-Ochoa Hilario Murua Martin Hall Marlon Román Jon Ruiz Nick Vogel Ainhoa Caballero Igor Sancristobal

Citation: Lezama-Ochoa N, Murua H, Hall M, Román M, Ruiz J, Vogel N, Caballero A and Sancristobal I (2017) Biodiversity and Habitat Characteristics of the Bycatch Assemblages in Fish Aggregating Devices (FADs) and School Sets in the Eastern Pacific Ocean. Front. Mar. Sci. 4:265. doi: 10.3389/fmars.2017.00265 Biodiversity and Habitat Characteristics of the Bycatch Assemblages in Fish Aggregating...

2006
S. BLANCHET J. J. DODSON S. BROSSE

A laboratory stream experiment was performed to test the influence of young-ofthe-year Atlantic salmon Salmo Salar density on habitat selection (i.e. pools and riffles) and the combined effect of habitat and density on territoriality. Pools were preferred at low and medium fish density. At higher density, the saturation of the riffles led to an equal fish repartition in both habitats. Aggressiv...

2001
JULIAN D. OLDEN DONALD A. JACKSON

—Understanding and predicting the impacts of habitat modification and loss on fish populations are among the main challenges confronting fisheries biologists in the new millennium. Statistical models play an important role in this regard, providing a means to quantify how environmental conditions shape contemporary patterns in fish populations and communities and formulating this knowledge in a...

Journal: :international journal of environmental research 0
j.h. kim department of biological science, college of bioscience and biotechnology, chungnam national university, daejeon 305-764, south korea h.m. oh environmental biotechnology research center, korea research institute of bioscience & biotechnology, daejeon 305-806, south korea i.s. kim institute of environmentally-friendly agriculture, college of agriculture and life sciences, chonnam national university, gwangju 500-757, south korea b.j. lim yeongsan river water research center, gwangju 500-480, south korea k.g. an department of biological science, college of bioscience and biotechnology, chungnam national university, daejeon 305-764, south korea

the objective of this study was to diagnose integrative ecological health of an urban stream,which is located in the asian temperate region. the research approach was primarily based on the index ofbiological integrity (ibi) using fish assemblage and a qualitative habitat evaluation index (qhei). and these indexes were compared with long-term conventional chemical dataset during 1996-2005. for ...

2014
Andrew C. Johnson John P. Sumpter

The natural range of fish species in our rivers is related to flow, elevation, temperature, local habitat and connectivity. For over 2000 years, humans have altered to varying degrees the river habitat. In the past 200 years, we added to the environmental disruption by discharging poorly treated sewage, nutrients and industrial waste into our rivers. For many rivers, the low point arrived durin...

2017
D. R. Ratcliff Wayne A. Wurtsbaugh

-Many reservoirs in arid regions experience highly variable water levels caused by seasonal inflow fluctuations and designated outflow requirements. At Shasta Lake, California, managers plant cerealgrain grass beds on exposed drawdown shorelines to increase juvenile fish habitat, localize productivity, and increase invertebrate fish prey. To determine the efficacy of these plantings, the abunda...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2006
L Casatti F Langeani A M Silva R M C Castro

A fish survey in 35 stream reaches (from 1st to 3rd order) with physicochemical and habitat assessment in the São José dos Dourados system, southeastern Brazil, was conducted. Most of the basin land cover (77.4%) is used for pasture. From the sampled stream reaches, 24 were of good physicochemical quality, 10 of fair quality, and only one of poor quality. A habitat assessment showed that 10 str...

Journal: :Science 2014
Loïc Pellissier Fabien Leprieur Valeriano Parravicini Peter F Cowman Michel Kulbicki Glenn Litsios Steffen M Olsen Mary S Wisz David R Bellwood David Mouillot

The most prominent pattern in global marine biogeography is the biodiversity peak in the Indo-Australian Archipelago. Yet the processes that underpin this pattern are still actively debated. By reconstructing global marine paleoenvironments over the past 3 million years on the basis of sediment cores, we assessed the extent to which Quaternary climate fluctuations can explain global variation i...

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