Body size and temperature are the two most important variables affecting nearly all biological rates and times, especially individual growth or production rates. By favoring an optimal maturation age and reproductive allocation, natural selection links individual growth to the mortality schedule. A recent model for evolution of life histories for species with indeterminate growth, which include...

Coexistence by a great number of species could reflect niche segregation at several resource axes. Differences in the use of a hilltop as mating site for a Eumaeini (Lycaenidae) community were measured to test whether niche segregation exists within this group. Specimens were collected throughout 21 samplings between July-October of 2004 and July-October of 2005. Two environmental variables and...

This paper reports an apparent biological difference between two otherwise identical preparations of piperazine hexahydrate. It reports the cutaneous irritancy and allergenicity ofthis substance and records the effect ofenvironmental temperature on those properties, particularly the former. Finally, it reports severe, delayed asthma-like response to piperazine exposure. Interrogation of compani...

Department of Anatomy and Embryology, School of Medicine, Ehime University, Ehime 791-0295, Japan Fresh meat is commonly marketing at environmental temperature for long time in many developing countries including Bangladesh. The present study was conducted to assess whether elapsed time between slaughter and preservation and storage conditions influence the chemical and microbial changes of loc...

Understanding what determines a species' range is a central objective in ecology and evolutionary biology. It has important applications for predicting species distributions and how they might respond to environmental perturbations. This paper describes a mechanistic approach to predict past and present distribution of the Japanese serow (Capricornis crispus) on Honshu, Japan. We applied state-...

1. The factors influencing the seasonal variation in blood pressure measured at home in normotensive women were examined. 2. Sixteen female subjects (56.3 +/- 7.9 years old, mean +/- SD) measured their blood pressure and pulse rate at home each morning for more than 20 times per month for at least 1.5 years. Blood pressure and body weight were also determined in the office once or twice a month...

We used bacteria to study experimentally the process of genetic adaptation to environmental temperature. Replicate lines of Escherichia coli, founded from a common ancestor, were propagated for 2,000 generations in 4 different thermal regimes as 4 experimental groups: constant 32, 37, or 42°C (thermal specialists), or a daily alternation between 32 and 42°C (32/42°C: thermal generalists). The a...

The forced expiratory volume over 0 75 second (F.E.V.0.75) was measured monthly for 3 years in 28 working ex-miners with pneumoconiosis and for one year in 17 normal laboratory workers. A significant annual cyclical variation of 0-044 litre amplitude was found in the ex-miners, with minimum and maximum values on 2 February and 3 August respectively. In the normal sulbjects the amplitude of the ...

BACKGROUND We investigated the impact of environmental temperature on mortality in São Paulo, Brazil, and examined differences in the temperature-mortality relationship with respect to cause, age group, and socioeconomic position (SEP). METHODS Generalized additive Poisson regression models adjusted for non-temperature related seasonal factors (including air pollution) were used to analyse da...

Piglets aged 12 to 72 h in which diarrhea had been induced by enteric Escherichia coli infection or sucrose gavage were studied with respect to cold resistance and thermal-circulation index in a 90-min test in a 6 C environment (Exp. 1) and free-choice environmental-temperature preference during a 60-min test in a 24 to 44 C thermocline (Exp. 2). In Exp. 1, diarrhea lowered the piglet's ability...