Low-dimensional materials with a negative Poisson’s ratio (NPR) have attracted lots of attention for their potential applications in aerospace, defense, etc. Although graphene and monolayer h-BN been reported to NPR behavior under external strains, the mechanism is not clear, critical strains occurrence are relatively larger. Here, we propose that origination phenomena 2D honeycomb structures c...

To better understand the respiratory physiology of triploid fish, we conducted an analysis of O2 and CO2 transport in diploid and triploid chinook salmon (Oncorhynchus tshawytscha) swimming at 0.4 body lengths (BL)·s–1, at 2.0 BL·s–1, and at the critical swimming velocity (Ucrit). While O2 consumption rates (MO2), MO2 max, and Ucrit did not differ between ploidies, triploids had a smaller incre...

the aim of this paper is to identify and analyses the influence of shareholder ownership identity on payout ratio for a panel of iran firms from 2002 to 2008. we found that there is a significant positive correlation between institutional ownership and payout ratio. the relation between payout ratio and individual ownership is negative. the most finding of the study indicates that iranian compa...

There has, as yet, been little study of nutrient disturbance and its consequences on the functional biology of primary consumers in coral reefs. The processing of epilithic algal communities by the damselfish Stegastes nigricans was investigated at La Réunion, at two sites of a fringing reef, oligotrophic for one and eutrophic for the other. Differences between sites were analyzed in quantifyin...

Freshwater conservation efforts require an understanding of how natural and anthropogenic factors shape the present-day biogeography of native and non-native species. This knowledge need is especially acute for imperiled native fishes in the highly modified Lower Colorado River Basin (LCRB), USA. In the present study we employed both a taxonomic and functional approach to explore how natural an...

We investigated the concordance of taxonomic richness patterns and their environmental correlates for assemblages of benthic macroinvertebrates, riparian birds, sedimentary diatoms, fish, planktonic crustaceans, and planktonic rotifers in 186 northeastern U.S. lakes. Taxon counts were standardized with respect to sampling effort using rarefaction. The degree of concordance among assemblage rich...