Reproductive Effort and Reproductive Values in Periodic Environments

2000 ◽  
Vol 155 (4) ◽  
pp. 454
Author(s):  
Brommer ◽  
Kokko ◽  
Pietiäinen
Keyword(s):  
Reproductive Effort ◽  
Periodic Environments

Reproductive Effort and Reproductive Values in Periodic Environments

2000 ◽  
Vol 155 (4) ◽  
pp. 454-472 ◽  
Author(s):  
Jon Brommer ◽  
Hanna Kokko ◽  
Hannu Pietiäinen
Keyword(s):  
Reproductive Effort ◽  
Periodic Environments

High Reproductive Effort and Low Recruitment Rates of European Beech: Is There a Limit for the Superior Competitor?

2015 ◽  
Vol 63 (2) ◽  
pp. 198-212 ◽  
Author(s):  
Jerzy Szwagrzyk ◽  
Georg Gratzer ◽  
Hanna Stępniewska ◽  
Janusz Szewczyk ◽  
Bojana Veselinovic
Keyword(s):  
Reproductive Effort ◽  
European Beech ◽  
High Reproductive Effort

Seed provenance determines germination responses of Rumex crispus (L.) under water stress and nutrient availability

2019 ◽  
Vol 12 (6) ◽  
pp. 949-961 ◽  
Author(s):  
María Pérez-Fernández ◽  
Carole P Elliott ◽  
Alex Valentine ◽  
José Antonio Oyola
Keyword(s):  
Reproductive Effort ◽  
Agricultural Soils ◽  
Inorganic Nitrogen ◽  
Seedling Emergence ◽  
Plant Mortality ◽  
Rumex Crispus ◽  
Reciprocal Transplantation ◽  
Transplantation Experiment ◽  
Germination Trial ◽  
Western Spain

Abstract Aims Seeds of Rumex crispus from six provenances were studied in relation to their germination under drought and presence of nitrogen in the germination and emergence media. We also investigated whether adaptation to soil increases the ability of the species to colonize and establish in contrasting environments along a longitudinal gradient in western Spain by means of a reciprocal transplantation experiment. Methods We conducted a germination trial in the lab to test for the germination responses to water scarcity along a polyethylene glycol gradient and to varying concentrations of nitrogen compounds. Simultaneously reciprocal transplantations experiment was conducted, where seeds from six provenances were grown in the soils from the very same provenances. Seedling emergence, survivorship and fitness-related variables were measured in all plots. Important Findings We found that R. crispus has a cold-stratification requirement that enhances its germination. Significant differences between the six provenances were detected for time-to-germination, total seedling emergence, plant mortality and reproductive effort in all the experiments. The differences between provenances with respect to germination were confirmed by the significant statistical analyses of the variance, thus providing evidence that seeds from parent plants grown in different environmental conditions have an intrinsically different abilities to germinate and establish. Soil nitrogen content where seed germination and seedlings establish also play an important role in their performance in terms of survivorship and reproduction, being the higher levels of inorganic nitrogen and of microbial biomass those that increased biomass production, enhanced inflorescence formation and reduced plant mortality. We conclude that one of the main reasons for the spread and maintenance of R. crispus would be the increased levels of nitrogen in agricultural soils.

A review of human male field studies of hormones and behavioral reproductive effort

2017 ◽  
Vol 91 ◽  
pp. 52-67 ◽  
Author(s):  
Peter B. Gray ◽  
Timothy S. McHale ◽  
Justin M. Carré
Keyword(s):  
Reproductive Effort ◽  
Field Studies ◽  
Human Male

Reproductive effort and costs of reproduction in female European ground squirrels

Oecologia ◽  
1999 ◽  
Vol 121 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Susanne Huber ◽  
Eva Millesi ◽  
Manfred Walzl ◽  
John Dittami ◽  
Walter Arnold
Keyword(s):  
Reproductive Effort ◽  
Ground Squirrels ◽  
Costs Of Reproduction

scholarly journals Cortisol but not testosterone is repeatable and varies with reproductive effort in wild red deer stags

2015 ◽  
Vol 222 ◽  
pp. 62-68 ◽  
Author(s):  
Alyson T. Pavitt ◽  
Craig A. Walling ◽  
Erich Möstl ◽  
Josephine M. Pemberton ◽  
Loeske E.B. Kruuk
Keyword(s):  
Red Deer ◽  
Reproductive Effort

ARE BODY CONDITION AND REPRODUCTIVE EFFORT OF LAYING GREATER SNOW GEESE AFFECTED BY THE SPRING HUNT?

The Condor ◽  
2002 ◽  
Vol 104 (1) ◽  
pp. 156 ◽  
Author(s):  
Julien Mainguy ◽  
Joël Bêty ◽  
Gilles Gauthier ◽  
Jean-François Giroux
Keyword(s):  
Body Condition ◽  
Reproductive Effort ◽  
Snow Geese

Does reproductive effort influence the metabolic rate of Tomodon dorsatus snakes?

2021 ◽  
Author(s):  
Jade Lima‐Santos ◽  
Selma Maria Almeida‐Santos ◽  
José Eduardo Carvalho ◽  
Cinthia A. Brasileiro
Keyword(s):  
Metabolic Rate ◽  
Reproductive Effort
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