Ecologists increasingly recognize that birds can respond to features well beyond their normal areas of activity, but little is known about the relative importance of landscapes and proximate factors or about the scales of landscapes that influence bird distributions. We examined the influences of tree cover at both proximate and landscape scales on grassland birds, a group of birds of high cons...

We introduce a concept of quasi proximate order which is generalization and allows us to study efficiently analytic functions whose lower growth are different. prove an existence theorem for order, i.e. counterpart Valiron’s order. As applications, we generalize complement some results M. Cartwright C. N. Linden on asymptotic behavior in the unit disc.

Fertility has declined very markedly in the majority of developing countries over the past thirty to forty years, and it continues to decline almost everywhere. As a result, fertility has reached very low levels in many countries. In addition, currently more than 40 per cent of the world’s population lives in countries with total fertility levels lower than 2.1 children per woman, the level tha...

One of the least understood aspects of animal development--the determination of body size--is currently the subject of intense scrutiny. A new study employs a modeling approach to expose the factors that matter in the control of insect size.

For a very long time, Albania has had one of the highest levels of fertility in Europe: in 2002 the total fertility rate of 2.2 children per woman was the highest in Europe. Although this current level is high, the country has experienced a rapid fertility reduction during the last 50 years: a TFR decline from 7 to 2.2. This reduction has occurred in the absence of modern contraception and abor...