the effects of drought and salinity stress on the growth and chemical compositions pennyroyal(mentha pulegium l.) plant were investigated. this experiment was carried out in a factorial-randomized design with four replications in controlled conditions and plantlets were subject to four soil moisture regimes (40, 60, 80 and 100 of field capacity (fc)) and five salt treatments with 0, 25, 50, 75 ...

abstract this study, aimed to achieve carapace length frequency, depth distribution, determining biomass and length-weight relationship of metapenaeus affinis in shrimp fishing grounds of hormomzgan province. sampling was carried out by trawl net and swept area method from january 2010 to february 2011. samples were transferred to the laboratory and biometric information entered on special form...

due to the use of secale montanum for different rangelands reclamation across the country, management of these ecosystems need to be aware of its ability to environmental stresses. this research investigated the effect of pollutant element of cu and pb on seed germination and growth of this species in laboratory. therefore, the effect of five treatments (control, 50, 100, 150, 200ppm) of pb (no...

This is the first study of growth and age of Sardinella sindensis from coastal waters of Qeshm Island (Persian Gulf) based on the sectioned otolith reading method. In total, 128 fishes were collected randomly from purse seine commercial nets during March 2011 to February 2012. The annual formation of the growth rings were determined by counting the opaque and translucent zones occurrence at the...

    The length-weight relationship, age, growth parameters, sex ratio, mortality and exploitation rate of Salmo trutta fario were determined in Lar dam. The sex ratio (male: female) was 1:1.84 which differed significantly from the expected 1:1. The length-weight regression was (females) and (males) indicating a negative allometric growth for both sexes. Growth parameters were estimated as L∞ = ...

To characterize some important eco-physiological aspects of  Alhagi pseudalhagi growth, the present investigation was conducted at the farm of Khorasan Agricultural Research Center during 2004-2005. Various botanical characteristics including root structure and existence of starch in root were studied. Number of seeds per pod, pod length and test weight were recorded. A number of field and pot ...

Length weight relationship and other allometric relationships were studied for shortneck clam Paphia malabarica. Lengthweight and total weight-flesh weight relationship in males and females were significantly different (p <0.01). The rate of growth in all other relationship studied were not significantly different between sexes. In lengthweight relationship it showed isometric growth and in len...