Key-words: red swamp crayfish, Procambarus clarkii, reproduction, population structure and population dynamics, invasive species Understanding population dynamics and regulation is fundamental for predicting establishment and spread of invasive alien species. In addition, the population biology of invasive alien species offers an opportunity to study basic ecological processes. In this context,...

A definition of the protein requirement of any population must include consideration of the purposes for which the requirement is being defined. For the normal adult, the requirement addresses primarily the needs for maintenance (i.e., the exogenous protein needed to maintain nitrogen equilibrium and hence body protein stores). The protein requirement of any pediatric population, particularly t...

the rapid growth of population in the third world countries specially in recent decades has posed an important social problem. there have been some attempts to propose solutions for this problem by scientists from various disciplines. however, it seems that an integrated approach calling for collaboration of various efforts can be more fruitful. in this work, we study the relation of women fert...

Nucleic acid and protein concentrations and their ratios are increasingly used as correlates of nutritional condition and growth in marine species. However, their application in studies of reptile growth has not yet been validated. The green turtle (Chelonia mydas) is an endangered marine reptile for which assessing population health requires knowledge of demographic parameters such as individu...

The recovery of Bald Eagles (Haliaeetus leucophalus), after DDT and other organochlorine insecticides were banned in the United States, can be regarded as one of the most iconic success stories resulting from the Endangered Species Act. Interest remains high in the recovery and growth of the Bald Eagle population. Common to evaluating growth and recovery rates are counts at nesting sites and an...

an experiment was conducted in order to evaluate the effects of se spraying on yield and growth indices of wheat under drought stress condition, in agriculture and natural resource research center of tehran province in 2011-12. a split plot layout within randomized complete block design with three replications were used. main plots were three irrigation treatments (normal irrigation, non-irriga...

vol. 6, no. 1, 2014, ser. 66/3     extended abstract   explaining the relationship indices of the performance evaluation and rank performance with the growth of the companies   m. afshar                                          r. zamani amugheen molana higher education, abyek, qazvin   introduction        due tocompetition in the global economy and an increase in public awareness about the fin...

Urbanization is a critical factor affecting the ecological and environmental balance of the Greater Toronto Area (GTA), the most populous metropolitan area in Canada, in the past three decades. The purpose of this chapter is to examine the relationship between landscape change and population increase patterns as well as to evaluate ecological impacts of urbanization in the GTA.Multi-temporal re...