نتایج جستجو برای: freshwater
تعداد نتایج: 28555 فیلتر نتایج به سال:
Satellite data and assimilation products are used to investigate fluctuations in the catch of Japanese eel (Anguilla japonica) in eastern Asian countries. It has been reported that the salinity front has extended farther south, which has shifted the eel's spawning grounds to a lower latitude, resulting in smaller eel catches in 1983, 1992, and 1998. This study demonstrates that interannual vari...
Adaptation is driven by natural selection; however, many adaptations are caused by weak selection acting over large timescales, complicating its study. Therefore, it is rarely possible to study selection comprehensively in natural environments. The threespine stickleback (Gasterosteus aculeatus) is a well-studied model organism with a short generation time, small genome size, and many genetic a...
Freshwater picocyanobacteria including Synechococcus remain poorly studied at the genomic level, compared to their marine representatives. Here, using a metagenomic assembly approach we discovered two novel Synechococcus sp. genomes from two freshwater reservoirs Tous and Lake Lanier, both sharing 96% average nucleotide identity and displaying high abundance levels in these two lakes located at...
*CRC for Freshwater Ecology, Centre for Riverine Landscapes, Griffith University, Nathan, Qld 4111, Australia, †CRC for Freshwater Ecology, Department of Environmental Management and Ecology, LaTrobe University, P. O. Box 821, Wodonga, Victoria 3689, Australia and §CRC for Freshwater Ecology, Monash University, Department of Biological Sciences, c/-MDFRC, P. O. Box 921, Albury, NSW 2640, Australia
AIM Global-scale studies are required to identify broad-scale patterns in the distributions of species, to evaluate the processes that determine diversity and to determine how similar or different these patterns and processes are among different groups of freshwater species. Broad-scale patterns of spatial variation in species distribution are central to many fundamental questions in macroecolo...
Six of New Zealand’s 16 regional councils are trialling collaborative planning as a means of addressing complex challenges in freshwater management. Although some work has been undertaken to evaluate similarities and differences across those processes, the success or failure rests with the public’s acceptance of the processes and their outcomes. This is the first study to evaluate public percep...
l. A simple technique was developed for accurately predicting the biomass of the freshwater prosobranch Viuiparus contectoides (Mesogastrapoda: Viviparidae) (Binney, 1865). 2. Regression of dry weight (biomass) on wet weight yielded a regression coefficient (r’) of 0.99 with an associated P < 0.001. 3. Biomass, therefore, can be predicted by measuring wet weights without sacrificing specimens.
An outstanding climate anomaly 8200 years before the present (B.P.) in the North Atlantic is commonly postulated to be the result of weakened overturning circulation triggered by a freshwater outburst. New stable isotopic and sedimentological records from a northwest Atlantic sediment core reveal that the most prominent Holocene anomaly in bottom-water chemistry and flow speed in the deep limb ...
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