The objective of this study was to evaluate non-genetic factors affecting longevity and survival of Guilan sheep from birth to yearling. Longevity and survival records of 41037 lambs born from 496 rams and 10256 ewes of Guilan sheep were analyzed using linear and Weibull models. Results indicated that the overall mean of longevity was 1260.84 days. The fixed effects of flock, dam age, sex, year...

Pricing and risk management for longevity risk has increasingly become a major challenge for life insurers and pension funds around the world. Risk transfer to financial markets, with their major capacity for efficient risk pooling, is an area of significant development for a successful longevity product market. The structuring and pricing of longevity risk using modern securitization methods, ...

The evolution of postmenopausal longevity in human females has been the subject of debate. Specifically, there is disagreement about whether the evolution of the trait should be understood as an adaptive or a neutral process, and if the former, what the selective mechanism is. There are two main adaptive proposals to explain the evolution of postreproductive longevity: the grandmother and the m...

BACKGROUND The longevity of an organism is influenced by both genetic and environmental factors. With respect to genetic factors, a significant effort is being made to identify pharmacological agents that extend life span by targeting pathways with a defined role in the aging process. On the environmental side, the molecular mechanisms responsible for the positive influence of interventions suc...

When predicting financial profits, relationship outcomes, longevity, or professional success, people habitually underestimate the likelihood of future negative events. This well-known bias, termed unrealistic optimism, is observed across age, culture, and species, and has a significant societal impact on domains ranging from financial markets to health and well being. However, it is unknown how...

in order to evaluate eight different protein sources in honey bee nutrition, some experiments were conducted as a completely randomized designs with four replicates and three steps incubator, field and overwintering in isfahan region. protein sources were lentil flour, soybean flour, soybean meal, bread yeast, wheat gluten, skim milk powder, fish meal and pollen. results showed that the longevi...

cotton bollworm, helicoverpa armigera (hübner) is one of the most destructive insect pests on many crops in the world that has been found to develop resistance against conventional insecticides. using insecticides with different modes of action may result in appropriate control of the pest and delay insecticide resistance development. in this study, lethal and sublethal effects of emamectin ben...

carnation (dianthus caryophyllus l.) is one of the most important cut flowers in the world. themajority of thecarnation cultivars are sensitive to ethylene which affected the physiological and biochemical postharvest characteristics of these flowers.applying inhibitors of biosynthesis and action of ethylene is important factor to protect the display quality and extend postharvest life. in order...

Recent results indicate that the longevity of both invertebrates and vertebrates can be altered through genetic manipulation and pharmacological intervention. Most of these interventions involve alterations of one or more of the following: insulin/IGF-I signaling pathway, caloric intake, stress resistance and nuclear structure. How longevity regulation relates to aging per se is less clear, but...

OBJECTIVE Subjective health is a complex indicator predicting longevity independent of objective health. Few studies examine genetic and environmental mechanisms underlying different facets of subjective health across the life course. METHOD Three subjective health measures were examined in 12,900 twins ( Mage = 63.38, range = 25-102) from nine studies in the Interplay of Genes and Environmen...