scholarly journals Important life history traits of Chaetopteryx villosa (Fabricius, 1798) (Trichoptera, Limnephilidae)

Zoosymposia ◽  
2011 ◽  
Vol 5 (1) ◽  
pp. 288-296
Author(s):  
KATARZYNA MAJECKA ◽  
JANUSZ MAJECKI ◽  
ANNA WALASZEK
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Life History Traits ◽  
Weather Conditions ◽  
Emergence Period ◽  
Ambient Temperatures ◽  
Long Period ◽  
Different Temperatures ◽  
Long Term Studies

Long-term studies of the life cycle of Chaetopteryx villosa (Fabricius) have been conducted in Wolbórka Spring, in the vicinity of Łódź (Central Poland). The emergence period of adults lasts from the beginning of October until mid December. During this relatively long period, adults are exposed to diverse weather conditions. Low (sometimes below zero) ambient temperatures influence the survival of adults. Although oviposition usually starts at the end of October, freshly laid eggs were found even in January. These temperatures also determine the activity of predators as well as the development and survival of eggs laid on land. Some egg masses have been transferred to the laboratory and bred at different temperatures.

Calcium effects on life-history traits in a wild population of the great tit (Parus major): analysis of long-term data at several spatial scales

Oecologia ◽  
2008 ◽  
Vol 159 (2) ◽  
pp. 463-472 ◽  
Author(s):  
Teddy Albert Wilkin ◽  
Andrew G. Gosler ◽  
Dany Garant ◽  
S. James Reynolds ◽  
Ben C. Sheldon
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Wild Population ◽  
Spatial Scales ◽  
Parus Major ◽  
Great Tit ◽  
Calcium Effects ◽  
Term Data

Coevolutionary interactions between host life histories and parasite life cycles

Parasitology ◽  
1998 ◽  
Vol 116 (S1) ◽  
pp. S47-S55 ◽  
Author(s):  
J. C. Koella ◽  
P. Agnew ◽  
Y. Michalakis
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Life Histories ◽  
Life History Traits ◽  
Evolutionary Ecology ◽  
Life Cycles ◽  
Microsporidian Parasite ◽  
History Of ◽  
Host Life ◽  
Host Parasite

SummarySeveral recent studies have discussed the interaction of host life-history traits and parasite life cycles. It has been observed that the life-history of a host often changes after infection by a parasite. In some cases, changes of host life-history traits reduce the costs of parasitism and can be interpreted as a form of resistance against the parasite. In other cases, changes of host life-history traits increase the parasite's transmission and can be interpreted as manipulation by the parasite. Alternatively, changes of host's life-history traits can also induce responses in the parasite's life cycle traits. After a brief review of recent studies, we treat in more detail the interaction between the microsporidian parasite Edhazardia aedis and its host, the mosquito Aedes aegypti. We consider the interactions between the host's life-history and parasite's life cycle that help shape the evolutionary ecology of their relationship. In particular, these interactions determine whether the parasite is benign and transmits vertically or is virulent and transmits horizontally.Key words: host-parasite interaction, life-history, life cycle, coevolution.

scholarly journals Can aphids learn to cope with the pressure of endophytic fungi in their food plants?

2007 ◽  
Vol 13 ◽  
pp. 333-336
Author(s):  
S.A. Härri ◽  
J. Krauss ◽  
C.B. Müller
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Rhopalosiphum Padi ◽  
Food Plants ◽  
Long Term Effects ◽  
Test Environment ◽  
Life History Parameters ◽  
Strain Adaptation ◽  
The Difference

Plant-endophyte associations can have major impacts on the dynamics of consumer interaction-webs but long-term effects of mycotoxins and the ability of herbivores to adapt to these toxins have not been studied. To understand the potential of aphids to cope with mycotoxins, we compared the life-history parameters for aphids conditioned for several generations on endophyte-infected plants with those of endophyte-naïve aphids on both endophyteinfected and endophyte-free grasses. Aphids conditioned on endophyte-infected plants produced more offspring during the first days of adulthood than endophyte-naïve aphids independent of the endophyte infection of the test environment. However, the endophyte-conditioned aphids tended to have a shorter lifespan, which resulted in similar numbers of total offspring produced for endophyte-conditioned and endophyte-naïve aphids. The difference in life-history parameters caused by the conditioning environment suggests that the effects of endophytes on herbivore life-history traits may represent an adaptive change that should be considered in future studies of endophyte-herbivore interactions. Keywords: Rhopalosiphum padi, Neotyphodium lolii, Lolium perenne, common strain, adaptation, long-term effects, microbes, endosymbionts, reproductive strategy, life-history traits

scholarly journals How social behaviour and life-history traits change with age and in the year prior to death in female yellow-bellied marmots

2021 ◽  
Vol 376 (1823) ◽  
pp. 20190745
Author(s):  
Svenja B. Kroeger ◽  
Daniel T. Blumstein ◽  
Julien G. A. Martin
Keyword(s):  
Life History ◽  
Social Behaviour ◽  
Life History Traits ◽  
Evolutionary Ecology ◽  
Natural Populations ◽  
Late Life ◽  
Integrative Approach ◽  
Trade Offs ◽  
Social Behaviours

Studies in natural populations are essential to understand the evolutionary ecology of senescence and terminal allocation. While there are an increasing number of studies investigating late-life variation in different life-history traits of wild populations, little is known about these patterns in social behaviour. We used long-term individual based data on yellow-bellied marmots (Marmota flaviventer) to quantify how affiliative social behaviours and different life-history traits vary with age and in the last year of life, and how patterns compare between the two. We found that some social behaviours and all life-history traits varied with age, whereas terminal last year of life effects were only observed in life-history traits. Our results imply that affiliative social behaviours do not act as a mechanism to adjust allocation among traits when close to death, and highlight the importance of adopting an integrative approach, studying late-life variation and senescence across multiple different traits, to allow the identification of potential trade-offs.This article is part of the theme issue ‘Ageing and sociality: why, when and how does sociality change ageing patterns?’

scholarly journals Long Term Bereavement Processes of Older Parents: The Three Phases of Grief

2005 ◽  
Vol 50 (2) ◽  
pp. 103-129 ◽  
Author(s):  
Ruth Malkinson ◽  
Liora Bar-Tur
Keyword(s):  
Content Analysis ◽  
Life Cycle ◽  
Old Age ◽  
Older Parents ◽  
Grieving Process ◽  
Long Period ◽  
Bereaved Parents ◽  
Extensive Information ◽  
Living Children

This study is based upon personal interviews with 47 elderly bereaved parents. These interviews provided us with detailed and extensive information on the bereavement processes that parents experience over a long period of years. From an in-depth content analysis of the interviews and the way the parents described bereavement, it seems that it is a central motif in their lives affecting their relationships with each other, with the living children, with friends, at work and with others. Although enduring grief along the life cycle is an un-patterned process with emotional and cognitive ups and downs, involving a continuous search for a meaning to life, we observed a development in this process throughout the years. As we proposed in a previous study (Malkinson & Bar-Tur, 2000) there are three main identifiable phases in the bereavement process: the immediate, acute phase; grief through the years until aging; and bereavement in old age. We propose to refer to them as the three main phases in the development of parental grieving process and name them “young grief,” “mature grief,” and “aging grief.”

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