Results 21 to 30 of about 1,102,149 (353)
Economic consequences of reproductive performance in dairy cattle [PDF]
, 2010 The net economic value of reproductive efficiency in dairy cattle was estimated using a stochastic dynamic simulation model. The objective was to compare the economic consequences of reproductive performance scenarios (“average” and “poor”) of a cow ...
Hogeveen, H. +4 more
core +3 more sources
The effect of temperature on the reproduction of Limnodrilus hoffmeisteri (Oligochaeta: Tubificidae)
Zoologia (Curitiba), 2009 The tubificid worm Limnodrilus hoffmeisteri Claparede, 1862 is widely used as an indicator of organic pollution in aquatic environments. Nevertheless, little is known about its biology.
Haroldo L. S. Nascimento +1 more
doaj +1 more source
Veterinary Sciences, 2020 The mite Varroa destructor, the main ectoparasite of honey bees, is a threat to apiculture worldwide. Understanding the ecological interactions between Varroa and honeybees is fundamental for reducing mite impact in apiaries.
Ignazio Floris +2 more
doaj +1 more source
Environmental conditions during early life accelerate the rate of senescence in a short-lived passerine bird [PDF]
, 2015 Environmental conditions experienced in early life may shape subsequent phenotypic traits including life history. We investigated how predation risk caused by domestic cats (Felis silvestris catus) and local breeding density affected patterns of ...
Balbontín Arenas, Javier +1 more
core +2 more sources
The geometry of reaction norms yields insights on classical fitness functions for Great Lakes salmon. [PDF]
, 2020 Life history theory examines how characteristics of organisms, such as age and size at maturity, may vary through natural selection as evolutionary responses that optimize fitness.
Breck, James E +5 more
core +2 more sources
A Brief Theory of Epidemic Kinetics
Biology, 2020 In the context of the COVID-19 epidemic, and on the basis of the Theory of Dynamical Systems, we propose a simple theoretical approach for the expansion of contagious diseases, with a particular focus on viral respiratory tracts.
François Louchet
doaj +1 more source
Early maternal experience shapes offspring performance in the wild [PDF]
, 2013 Both the environments experienced by a mother as a juvenile and an adult can affect her investment in offspring. However, the implications of these maternal legacies, both juvenile and adult, for offspring fitness in natural populations are unclear.
Armstrong, J.D. +4 more
core +1 more source
Born to Win: Reproductive Health Policy and Urban Education Returns in China
Frontiers in Public Health, 2022 This study explores the relationship between China's reproductive health policy and the rate of return on urban education by using fixed-effect, mediating-effect, and breakpoint regression models.
Qing Gao +6 more
doaj +1 more source
Bounding reproductive rates in state‐space models for animal population dynamics
Ecosphere, 2018 Time‐series models applied in the study of animal population dynamics commonly assume linearity on the log‐scale, leading to log‐normally distributed rates of increase.
Martin Sköld, Jonas Knape
doaj +1 more source
Persian Journal of Acarology, 2013 Fig mite, Eotetranychus hirsti Pritchard & Baker, 1955, is one of the major pests of fig trees in Estahban (Fars province, Iran). Life table parameters of E. hirsti were studied at 30±1 °C, 60±10% R.H.
Negar Daneshnia +2 more
doaj +1 more source