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Resource allocation and post-reproductive degeneration in the freshwater cnidarian Hydra oligactis (Pallas, 1766).

Jácint Tökölyi, +3 more
- 01 Feb 2017 - 
- Vol. 120, pp 110-116
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TLDR
Investigation of survival and reproduction at different levels of food availability in 10 lineages of H. oligactis derived from a single Hungarian population showed that survival is conserved at the expense of reproduction in this population when food is low, suggesting that patterns of reproduction and survival are influenced by resource availability.
About: 
This article is published in Zoology.The article was published on 2017-02-01 and is currently open access. It has received 15 citations till now. The article focuses on the topics: Hydra oligactis & Sexual reproduction.

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Journal ArticleDOI

Age-dependent plasticity in reproductive investment, regeneration capacity and survival in a partially clonal animal (Hydra oligactis).

Flóra Sebestyén, +3 more
- 01 Oct 2020 - 
TL;DR: It is shown that in H. oligactis asexual reproduction coupled with higher somatic maintenance is prioritized earlier in life, while sexual reproduction with higher maintenance costs occurs later if sex is induced, confirming general life history theory predictions on resource allocation between somatictenance and sexual reproduction applying in a partially clonal species.
Journal ArticleDOI

Reproductive mode, stem cells and regeneration in a freshwater cnidarian with postreproductive senescence

Flóra Sebestyén, +2 more
- 01 Nov 2018 - 
TL;DR: In this paper, the authors compared sexually and asexually reproducing individuals to non-reproductives, and found that the physiological costs of reproduction are higher for sexual individuals.
Journal ArticleDOI

Phenotypic plasticity rather than genotype drives reproductive choices in Hydra populations.

Máté Miklós, +5 more
- 19 Jan 2021 - 
TL;DR: In this paper, the authors studied genetic differentiation of coexisting sexual and asexual Hydra oligactis polyps, a freshwater cnidarian where reproductive mode-dependent life history patterns are observed.
Journal ArticleDOI

Seasonal variation in sexual readiness in a facultatively sexual freshwater cnidarian with diapausing eggs

Jácint Tökölyi, +2 more
- 01 Aug 2021 - 
TL;DR: It is suggested that reciprocal cold and warm periods are required for sex induction in H. oligactis, a facultatively sexual freshwater cnidarian where sex only occurs prior to the onset of winter, and sexual propensity increases with warm exposure.
Journal ArticleDOI

Experimental manipulation of body size alters life history in hydra.

Kha Sach Ngo, +3 more
- 19 Feb 2021 - 
TL;DR: In this article, the authors used the cnidarian Hydra oligactis to directly manipulate body size and understand its causal effects on reproduction and senescence, and found that experimentally reducing size delayed sexual development and lowered fecundity, while post-reproductive survival increased.
References
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Journal Article

R: A language and environment for statistical computing.

R Core Team
- 01 Jan 2014 - 
TL;DR: Copyright (©) 1999–2012 R Foundation for Statistical Computing; permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and permission notice are preserved on all copies.
Journal ArticleDOI

Fitting Linear Mixed-Effects Models Using lme4

Douglas M. Bates, +3 more
- 07 Oct 2015 - 
TL;DR: In this article, a model is described in an lmer call by a formula, in this case including both fixed-and random-effects terms, and the formula and data together determine a numerical representation of the model from which the profiled deviance or the profeatured REML criterion can be evaluated as a function of some of model parameters.
Journal ArticleDOI

Temporal Variation in Fitness Components and Population Dynamics of Large Herbivores

Jean-Michel Gaillard, +4 more
- 01 Nov 2000 - 
TL;DR: In large-herbivore populations, environmental variation and density dependence co-occur and have similar effects on various fitness components and how that variability affects changes in population growth rates is examined.
Journal ArticleDOI

Evolution of senescence: late survival sacrificed for reproduction.

Thomas B. L. Kirkwood, +1 more
- 29 Apr 1991 - 
TL;DR: The antagonistic pleiotropy theory proposes that certain alleles that are favoured because of beneficial early effects also have deleterious later effects, and the disposable soma theory suggests that because of the competing demands of reproduction less effort is invested in the maintenance of somatic tissues than is necessary for indefinite survival.
Journal ArticleDOI

Reproductive Effort and Terminal Investment in Iteroparous Animals

Tim H. Clutton-Brock
- 01 Feb 1984 - 
TL;DR: Though the long-lived birds and mammals are among the most promising organisms on which to test the theory that reproductive effort increases with age, measures of fecundity commonly decline with increasing maternal age, some recent evidence suggests that offspring survival may improve toward the end of the lifespan.
Related Papers (5)

Degeneration after sexual differentiation in hydra and its relevance to the evolution of aging.

Kengo Yoshida, +4 more
- 30 Dec 2006 - 

Hydra, a powerful model for aging studies

Szymon Tomczyk, +3 more
- 30 Jan 2015 - 

A Limnological Study of Hydra oligactis in Douglas Lake, Michigan

Paul S. Welch, +1 more
- 01 Oct 1924 - 

Dynamics of Hydra populations in Lake Zürich, Switzerland, and Lake Maggiore, Italy

G. Ribi, +3 more

La pérennité somatique

Paul Brien
- 01 Aug 1953 - 
Frequently Asked Questions (2)
Q1. What are the contributions in "Resource allocation and post-reproductive degeneration in the freshwater cnidarian hydra oligactis (pallas, 1766)" ?

To test this prediction the authors investigated survival and reproduction at different levels of food availability in 10 lineages of H. oligactis derived from a single Hungarian population. 

This is an assumption that should be tested in the future. This is a prediction that should also be tested in the future. Further studies should ( i ) investigate the relationship between fecundity and survival rate on a much wider sample of hydra populations kept under identical conditions and ( ii ) attempt to manipulate reproductive investment independently from food ( e. g., by manipulating mate availability or population density as ultimate factors, or potential physiological regulators as proximate factors ) to unequivocally answer this question.