In this study, population dynamics of venerid bivalve Paphia cor was investigated for a one-year period (2008-2009) in Bushehr shoreline areas (50˚ 40´ E- 29˚ 14´N) to estimate the stock abundance, growth parameters and natural mortality. Sampling was carried out bi-monthly by transects at random direction and zigzag pattern with duplicated quadrate (0.25 m2). The length frequency was ...

in this study, population dynamics of venerid bivalve paphia cor was investigated for a one-year period (2008-2009) in bushehr shoreline areas (50˚ 40´ e- 29˚ 14´n) to estimate the stock abundance, growth parameters and natural mortality. sampling was carried out bi-monthly by transects at random direction and zigzag pattern with duplicated quadrate (0.25 m2). the length frequency was used to e...

Modified couple stress theory is applied to study of temperature effects on free vibration of Timoshenko functionally graded microbeams. Due to the interatomic and microstructural reactions of the structures in micro scale, the dynamic behavior of the microbeam is predicted more accurate applying the couple stress theory. Both of the simply supported and clamped boundary conditions are assumed ...

1. We examined the ecological genetics of the invasive cladoceran Daphnia lumholtzi in a reservoir (Lake Texoma) in the southern USA. This species originates from the Old World subtropics and has spread across North America since the late 1980s after its inadvertent introduction to a reservoir in northeastern Texas. 2. The population genetic structure of D. lumholtzi was examined seasonally on ...

to study the effect of salinity and organic matter on chemical composition and root morphology of pistachio cv. badami, budded on seedling root stocks, a greenhouse experiment was conducted as a factorial based on a completely randomized design with three replications. treatments consisted of four salinity (zero, 800, 1600 and 2400 mg nacl kg-1 soil) and three organic matter (zero, two and four...

A major problem of arid and semi-arid regions is environmental stresses like salinity and drought. To study the effect of Artichoke germination under different levels of salinity and drought, two separate experiments were performed. The experimental treatments included different salinity levels of NaCl (0, 50, 100, 150 mM) and five drought levels by PEG (0, 10%, 15%, 20% and 25%) with three rep...

Soil and water salinity substantially constrain crop and biomass production. To investigate the changes in morphological parameters of lisianthus (Eustoma grandiflorum) cultivars under CaCl2 salinity conditions a greenhouse experiment was conducted. Cultivars namely, ‘Champagne’ (C1), ‘Lime Green’ (C2), ‘Blue Picotee’ (C3) and ‘Pure White’ (C4), were subjected to salt stress (0–30 mM CaCl2) in ...