Results 331 to 340 of about 861,688 (365)

Biology of Amphibians

, 1986
Introduction to amphibia - the world of amphibians, historical resume, prospects for the future. Part 1 Life History: reproductive strategies - reproductive cycles, reproductive mode, quantitative aspects, parental care, evolution of reproductive ...
W. Duellman, L. Trueb
semanticscholar   +1 more source

Avian Egg and Egg Coat

2017
An ovulated egg of vertebrates is surrounded by unique extracellular matrix, the egg coat or zona pellucida, playing important roles in fertilization and early development. The vertebrate egg coat is composed of two to six zona pellucida (ZP) glycoproteins that are characterized by the evolutionarily conserved ZP-domain module and classified into six ...
openaire   +3 more sources

The Evolution of Parental Care

, 2019
Synthesizing studies of parental care in a wide variety of animals, this book is the first attempt to provide general answers to the following important questions: Why does the extent of parental care vary so widely between species?
T. Clutton‐Brock
semanticscholar   +1 more source

Essential role of the inositol 1,4,5-trisphosphate receptor/Ca2+ release channel in Ca2+ waves and Ca2+ oscillations at fertilization of mammalian eggs.

Developmental Biology, 1993
At fertilization mammalian eggs exhibit repetitive rises in the cytoplasmic Ca2+ concentration (Ca2+ oscillations), associated with propagating Ca2+ waves in the initial responses. The Ca2+ oscillation causes cortical granule exocytosis and resumption of
S. Miyazaki, H. Shirakawa, K. Nakada, Yoshiko Honda   +3 more
semanticscholar   +1 more source

Host plant quality and fecundity in herbivorous insects.

Annual Review of Entomology, 2002
Host plant quality is a key determinant of the fecundity of herbivorous insects. Components of host plant quality (such as carbon, nitrogen, and defensive metabolites) directly affect potential and achieved herbivore fecundity.
C. Awmack, S. Leather
semanticscholar   +1 more source

Biology of Wolbachia.

Annual Review of Entomology, 2003
Wolbachia are a common and widespread group of bacteria found in reproductive tissues of arthropods. These bacteria are transmitted through the cytoplasm of eggs and have evolved various mechanisms for manipulating reproduction of their hosts, including ...
J. Werren
semanticscholar   +1 more source

An egg for an egg and a bean for a bean?

Research Papers in Economics, 2018
On-farm production diversity of smallholder farmers can improve the nutrition security of the household. The objective is to determine the significance and relevance of this relationship by considering the different degrees of separability between both the commercial and consumptive production of food.
Ludwig, Till, Ludwig, Till
openaire   +2 more sources

Number of eggs in egg-noodles.

Annali di chimica, 2002
The official method to determine the number of eggs present in egg-noodles is the digitonin method. By applying this method the total content of sterols is determined and expressed as total sterols. The official method is time consuming, not very accurate and its performance is very complicated.
BOTTARI, Emilio Giovanni, R. DE ACUTIS, FESTA, Maria Rosa   +2 more
openaire   +2 more sources

The hen's egg: Density of egg shell and egg contents

British Poultry Science, 1968
Synopsis One hundred eggs were used, from hens of seven widely differing strains: two commercial brown‐egg hybrids (one British, one American), two commercial white‐egg hybrids (one British, one Canadian), one broiler strain, one highly inbred strain of laboratory White Leghorns and one laboratory strain of Brown Leghorns.
openaire   +2 more sources

Development of reconstituted mouse eggs suggests imprinting of the genome during gametogenesis

Nature, 1984
M. Surani, S. Barton, M. Norris
semanticscholar   +1 more source