نتایج جستجو برای: life stages

تعداد نتایج: 914297  

2016
Guang Hu Kenneth J. Feeley Mingjian Yu

Habitat fragmentation is one of the principal causes of biodiversity loss and hence understanding its impacts on community assembly and disassembly is an important topic in ecology. We studied the relationships between fragmentation and community assembly processes in the land-bridge island system of Thousand Island Lake in East China. We focused on the changes in species diversity and phylogen...

Corporate social responsibility (CSR) has become an integral part of conducting business around the world. In this study, the impact of different stages of the company life cycle on corporate social responsibility has been investigated. Also quadruple financial resources, corporate size, profitability, cash resources and financial leverage have been used as moderator variables. In order to achi...

2016
Emma E. Hodgson Timothy E. Essington Isaac C. Kaplan

Species are experiencing a suite of novel stressors from anthropogenic activities that have impacts at multiple scales. Vulnerability assessment is one tool to evaluate the likely impacts that these stressors pose to species so that high-vulnerability cases can be identified and prioritized for monitoring, protection, or mitigation. Commonly used semi-quantitative methods lack a framework to ex...

2013
R. C. Chambers A. C. Candelmo E. A. Habeck M. E. Poach D. Wieczorek K. R. Cooper C. E. Greenfield B. A. Phelan

Introduction Conclusions References

Journal: :Toxicological sciences : an official journal of the Society of Toxicology 2004
Douglas J Fort Patrick D Guiney John A Weeks John H Thomas Robert L Rogers Andra M Noll Clinton D Spaulding

The toxicological effects of the organochlorine pesticide methoxychlor were evaluated at various life stages of the South African clawed frog, Xenopus laevis, in an effort to determine stage-specific sensitivity. A battery of four separate assays, including a short-term (4-day) early embryo-larval assay (FETAX) (NF stages 8-46 [Nieuwkoop and Faber, 1994]), 30-day hind limb development assay (NF...

Journal: :Proceedings. Biological sciences 2014
J David Aguirre Mark W Blows Dustin J Marshall

Metamorphosis is common in animals, yet the genetic associations between life cycle stages are poorly understood. Given the radical changes that occur at metamorphosis, selection may differ before and after metamorphosis, and the extent that genetic associations between pre- and post-metamorphic traits constrain evolutionary change is a subject of considerable interest. In some instances, metam...

1997
Mervi Ranta

This paper discusses the requirements on product model presentations that are suitable for reuse. The aim is to define promising directions for future research by recognizing how the characteristics of reuse entities vary at the different stages of the product life-cycle. Reuse entities are roughly categorized into three types of presentation entities: macroscopic principles for the early stage...

2017
Chizuko Inui-Yamamoto Takashi Yamamoto Katsura Ueda Michiko Nakatsuka Shunji Kumabe Tadashi Inui Yasutomo Iwai

Taste preference, a key component of food choice, changes with aging. However, it remains unclear how this occurs. To determine differences in taste preference between rats in different life stages, we examined the consumption of taste solutions and water using a two-bottle test. Male Sprague-Dawley rats of different ages were used: juvenile (3-6 weeks), young adult (8-11 weeks), adult (17-20 w...

Journal: :Journal of nematology 1985
M J Bonner D P Schmitt

Population fluctuations of Heterodera glycines differ in fields with high and low initial population densities. In a field with low initial numbers of nematodes, the numbers of cysts and eggs in soil remained low through 100 days from planting then increased during the remainder of the growing season. In a field with high initial nematode populations, numbers increased at 30 days, decreased to ...

Journal: :The Proceedings of the Nutrition Society 2000
A Drewnowski

Taste preferences, food choices and eating habits all change with age. The transition from childhood to adolescence and adult life is associated with reduced sweet taste preferences, lower sugars consumption and reduced energy density of the diet. Ageing is associated with elevated acceptance of bitter tastes, elevated preferences for vegetables and salad greens, and increased consumption of wh...

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