Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

From one laying to another the female collembolan adapts its eggs to environmental constraints

22.09.2008
Reproductive plasticity – the ability of individuals to modify their reproduction and the characteristics of their progeny according to environmental or social conditions – is a crucial factor in the demographics of animal populations, including man.

Two scientists in the Laboratoire Écologie & Évolution (CNRS/Université Pierre et Marie Curie/École normale supérieure de Paris) have demonstrated the adaptive nature of the reproductive behavior of certain arthropods from one laying to another, in the same female.

Thomas Tully and Régis Ferrière, researchers in the Laboratoire Écologie & Évolution(1), studied populations of Collembola, one of the most ancient and abundant groups of arthropods on Earth.

They showed that over the course of evolution, some Collembola populations have acquired an extraordinary ability to adjust their reproductive behavior when faced with abrupt environmental or social change. From one laying to another, a female can adapt not only the number but the size of her eggs, so that the young will be more capable of surviving in their new environmental conditions.

In a food-rich environment, females will tend to lay a larger number of smaller eggs. In a highly competitive environment, where individuals are numerous but food is less abundant, the eggs will be fewer in number but larger, thus allowing larger newborns to survive better under these difficult conditions.

Such flexibility constitutes a major adaptation, but the scientists also noted that the most plastic lines of Collembola were also those that experienced the earliest mortality. In this species, two strategies coexist in nature: plastic reproduction at the cost of reduced longevity, or a longer life without any great capacity for reproductive adjustment.

Comparison of these two strategies, which diverged at an early stage in the evolutionary history of this species, suggests that accelerated aging could result not simply from more intense reproduction but also from a high level of plasticity and genetic potential for reproduction.

Julien Guillaume | alfa
Further information:
http://www.cnrs.fr

More articles from Life Sciences:

nachricht Exciting Plant Vacuoles
14.06.2019 | Julius-Maximilians-Universität Würzburg

nachricht A microscopic topographic map of cellular function
13.06.2019 | University of Missouri-Columbia

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: MPSD team discovers light-induced ferroelectricity in strontium titanate

Light can be used not only to measure materials’ properties, but also to change them. Especially interesting are those cases in which the function of a material can be modified, such as its ability to conduct electricity or to store information in its magnetic state. A team led by Andrea Cavalleri from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg used terahertz frequency light pulses to transform a non-ferroelectric material into a ferroelectric one.

Ferroelectricity is a state in which the constituent lattice “looks” in one specific direction, forming a macroscopic electrical polarisation. The ability to...

Im Focus: Determining the Earth’s gravity field more accurately than ever before

Researchers at TU Graz calculate the most accurate gravity field determination of the Earth using 1.16 billion satellite measurements. This yields valuable knowledge for climate research.

The Earth’s gravity fluctuates from place to place. Geodesists use this phenomenon to observe geodynamic and climatological processes. Using...

Im Focus: Tube anemone has the largest animal mitochondrial genome ever sequenced

Discovery by Brazilian and US researchers could change the classification of two species, which appear more akin to jellyfish than was thought.

The tube anemone Isarachnanthus nocturnus is only 15 cm long but has the largest mitochondrial genome of any animal sequenced to date, with 80,923 base pairs....

Im Focus: Tiny light box opens new doors into the nanoworld

Researchers at Chalmers University of Technology, Sweden, have discovered a completely new way of capturing, amplifying and linking light to matter at the nanolevel. Using a tiny box, built from stacked atomically thin material, they have succeeded in creating a type of feedback loop in which light and matter become one. The discovery, which was recently published in Nature Nanotechnology, opens up new possibilities in the world of nanophotonics.

Photonics is concerned with various means of using light. Fibre-optic communication is an example of photonics, as is the technology behind photodetectors and...

Im Focus: Cost-effective and individualized advanced electronic packaging in small batches now available

Fraunhofer IZM is joining the EUROPRACTICE IC Service platform. Together, the partners are making fan-out wafer level packaging (FOWLP) for electronic devices available and affordable even in small batches – and thus of interest to research institutes, universities, and SMEs. Costs can be significantly reduced by up to ten customers implementing individual fan-out wafer level packaging for their ICs or other components on a multi-project wafer. The target group includes any organization that does not produce in large quantities, but requires prototypes.

Research always means trying things out and daring to do new things. Research institutes, universities, and SMEs do not produce in large batches, but rather...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

SEMANTiCS 2019 brings together industry leaders and data scientists in Karlsruhe

29.04.2019 | Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

First dust conference in the Central Asian part of the earth’s dust belt

15.04.2019 | Event News

 
Latest News

Concert of magnetic moments

14.06.2019 | Information Technology

Materials informatics reveals new class of super-hard alloys

14.06.2019 | Materials Sciences

New imaging modality targets cholesterol in arterial plaque

14.06.2019 | Medical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>