Insect Archive
68.1K views | +13 today
Follow
Insect Archive
Enseignement - Documentation - Ressources en ligne - Histoire - Billets, récits, analyses...
Your new post is loading...
Your new post is loading...
Scooped by Bernadette Cassel
April 1, 2013 5:31 PM
Scoop.it!

Papuan phonebook helps scientists describe 101 new beetle species

Papuan phonebook helps scientists describe 101 new beetle species | Insect Archive | Scoop.it
Tropical rainforests are known for their high biodiversity of countless species, many of them unknown and not named by scientists yet. A large proportion of this undiscovered life on earth is formed by insects, especially beetles.
Bernadette Cassel's insight:

 

101 nouvelles espèces de coléoptères, appartenant toutes à un même genre très diversifié : l'annuaire papou aide les scientifiques à donner des noms à certaines d'entre elles.

 

Liste et description des espèces :

http://species-id.net/wiki/Special:PrefixIndex/trigonopterus

 

 

No comment yet.
Scooped by Bernadette Cassel
March 31, 2013 2:46 PM
Scoop.it!

Do Ants Need to Estimate the Geometrical Properties of Trail Bifurcations to Find an Efficient Route? A Swarm Robotics Test Bed

Typical time course of an experiment (1 hour). The starting area is in the top right corner, the target area in the bottom left corner. Video published by Simon Garnier and al. - Publication in PLOS computational biology - march 2013.
Bernadette Cassel's insight:

 

Via Slate.fr :

 

→ Les robots-fourmis s'entraident pour trouver le plus court chemin

http://www.slate.fr/life/70113/robots-fourmis-plus-court-chemin

 

 

 

SUR ENTOMONEWS :

 

→ Des chercheurs toulousains utilisent des micro-robots qui imitent les fourmis pour comprendre leur comportement http://sco.lt/6EU0cj

 

No comment yet.
Scooped by Bernadette Cassel
March 31, 2013 11:52 AM
Scoop.it!

Technology leads taxonomists to create better species, not more species

Technology leads taxonomists to create better species, not more species | Insect Archive | Scoop.it

 

Taxonomists live in an age of technological riches. We have digital cameras, high-powered microscopes, DNA sequencers, computers, and boatloads of software for managing data. Each new technology is introduced with some party or other promising that the invention will speed the molasses-like pace of new species descriptions. After all, forests are falling in the name of progress, and if we don’t catalog what lives in them countless species will vanish without our knowing they even existed.

 

[...]

 

Bernadette Cassel's insight:

 

À propos de taxonomie, suite à la révision du genre et à la description de deux nouvelles espèces de fourmis de Madagascar :

 

→ A taxonomic revision of the Meranoplus F. Smith of Madagascar (Hymenoptera: Formicidae: Myrmicinae) with keys to species and diagnosis of the males

http://www.mapress.com/zootaxa/2013/f/zt03635p339.pdf

 

No comment yet.
Scooped by Bernadette Cassel
March 30, 2013 3:53 PM
Scoop.it!

[2010] Mass of ants behaving as a fluid

 

Fire ants use their claws to grip diverse surfaces, including each other. As a result of their mutual adhesion and large numbers, ant colonies flow like inanimate fluids. This film shows how ants behave similarly to the spreading of drops, the capillary rise of menisci, and gravity-driven flow down a wall. By emulating the flow of fluids, ant colonies can remain united under stressful conditions.

 

Bernadette Cassel's insight:

 

Lorsqu'elles s'agrippent les unes aux autres, les fourmis forment une masse qui se comporte comme un fluide.

 

No comment yet.
Rescooped by Bernadette Cassel from InsectNews
March 30, 2013 6:59 AM
Scoop.it!

Gorgeous Glasswing Butterflies (42 Stunning Photos)

Gorgeous Glasswing Butterflies (42 Stunning Photos) | Insect Archive | Scoop.it
Nature has better tricks than even Photoshop, as these translucent glasswing butterflies illustrate. [42 Fabulous Photos]

Via Matti Virtala
Bernadette Cassel's insight:

 

DANS VARIÉTÉS ENTOMOLOGIQUES :

 

→ Découvrez le Greta oto, l’incroyable papillon qui possède des ailes transparentes http://sco.lt/6NmHXV

 

No comment yet.
Scooped by Bernadette Cassel
March 29, 2013 2:12 PM
Scoop.it!

Un toit végétal spécialement conçu pour les insectes sur le Victoria & Albert Museum de Londres

Un toit végétal spécialement conçu pour les insectes sur le Victoria & Albert Museum de Londres | Insect Archive | Scoop.it

Buglife. « The world's greatest museum of art and design gets a new roof for wildlife »


« The new roof will be monitored by wildlife experts this summer as part of wider research to identify which invertebrates are using the roof. Previous studies on Living Roofs in central London have recorded many species of beetles, flies and bees including the nationally rare Brown-banded carder bee (Bombus humilis). »


No comment yet.
Scooped by Bernadette Cassel
March 27, 2013 4:05 PM
Scoop.it!

Pesticide combination affects bees' ability to learn

Pesticide combination affects bees' ability to learn | Insect Archive | Scoop.it
Two new studies have highlighted a negative impact on bees' ability to learn following exposure to a combination of pesticides commonly used in agriculture.
Bernadette Cassel's insight:

 

Deux nouvelles études ont mis en évidence un impact négatif sur la capacité des abeilles à apprendre après l'exposition à une combinaison de pesticides couramment utilisés en agriculture.

 

Les chercheurs ont constaté que les pesticides, qu'ils ont utilisés à des niveaux équivalents à ceux rencontrés dans la nature, pourraient interférer avec les circuits d'apprentissage dans le cerveau de l'abeille.

 

Ils ont également constaté que les abeilles exposées à des pesticides combinés ont été plus lentes à apprendre ou ont complètement oublié d'importantes associations entre parfum floral et récompenses alimentaires.

 

(d'après le résumé de l'article)

 

No comment yet.
Scooped by Bernadette Cassel
March 26, 2013 5:53 AM
Scoop.it!

Researchers alter mosquito genome with goal of controlling disease

Researchers alter mosquito genome with goal of controlling disease | Insect Archive | Scoop.it
With a technique called TALENS, scientists used a pair of engineered proteins to disrupt a targeted gene in the mosquito genome, changing the eye color of ensuing generations of the insect.
Bernadette Cassel's insight:

 

Des chercheurs ont utilisé avec succès une technique de disruption génique* pour changer la couleur des yeux d'un moustique - une étape cruciale vers de nouvelles stratégies génétiques visant à perturber la transmission de maladies telles que la dengue.

 

(d'après le résumé de l'article)

 

* interruption de la séquence codante d'un gène par introduction d'une autre séquence d'ADN

 

No comment yet.
Scooped by Bernadette Cassel
March 23, 2013 5:23 AM
Scoop.it!

Spider Silk Harvesting

A Golden Orb Weaver (Nephila edulis) is sedated with carbon dioxide gas, and pinned around her limbs and abdomen, keeping her in place without causing any ha...
Bernadette Cassel's insight:

 

La récolte de la soie d'araignée

No comment yet.
Scooped by Bernadette Cassel
March 21, 2013 8:14 PM
Scoop.it!

The Bizarre History of Insect Head Transplants

The Bizarre History of Insect Head Transplants | Insect Archive | Scoop.it
Head transplants sound the most crazy futuristic scenario imaginable. Right? But not to entomologists. They’ve been transplanting the head of one insect onto another for 90 years -- while keeping both insects alive.
Bernadette Cassel's insight:

 

Il y a 90 ans, des entomologistes ont greffé une tête d'insecte sur un autre tout en les gardant vivants...

 

No comment yet.
Scooped by Bernadette Cassel
March 19, 2013 12:43 PM
Scoop.it!

Kill Bill character inspires the name of a new parasitoid wasp species

Kill Bill character inspires the name of a new parasitoid wasp species | Insect Archive | Scoop.it
Parasitoid wasps of the family Braconidae are known for their deadly reproductive habits.
Bernadette Cassel's insight:

 

Il y a désormais un point commun entre une nouvelle espèce de guêpe et Kill Bill

 

No comment yet.
Scooped by Bernadette Cassel
March 17, 2013 12:35 PM
Scoop.it!

Beyond the Human Eye: Fatal Attraction

Beyond the Human Eye: Fatal Attraction | Insect Archive | Scoop.it

 

Fungus gnats that emerge in swarms from soil in plant pots have become the bane of many gardeners' lives. If you grow plants in commercial potting composts on your house window ledge or in a greenhouse or conservatory, it's inevitable that you'll encounter these irritating pests because it seems that all currently available bags of potting compost are infested with them.

 

These little insects are scientifically known as Bradysia paupera and belong to a group known as sciarid flies. Each female can lay around 200 eggs which hatch into a worm-like, transparent larva that feeds on organic matter in the soil and also on young plant roots. A heavy infestation is capable of killing seedlings. They breed all-year-round, with overlapping generations that take less than a month to progress from egg to adult, so combating them is a constant challenge, but fortunately they have a fatal weakness - the colour yellow. They are attracted to these sticky yellow sheets of plastic that you can buy in garden centres and are glued to them as soon as their feet touch the surface.

 

[...]

Bernadette Cassel's insight:

 

« Lutte contre les sciarides : Pinguicula moranensis, grassette »

 

via Twitter https://twitter.com/ROGERLATOUR/status/313274455218597888

 

No comment yet.
Scooped by Bernadette Cassel
March 14, 2013 2:31 PM
Scoop.it!

Ant Mimics

Ant Mimics | Insect Archive | Scoop.it

 

A great many animals mimic the form, color, and movements of ants.

 

→ Synemosyna (top) is a jumping spider mimic of Pseudomyrmex.

Bernadette Cassel's insight:

 

« Alex Wild a mis dix ans pour cette galerie de photos de mimique de fourmis »

 

via Twitter https://twitter.com/ROGERLATOUR/status/312190125616553984

 

No comment yet.
Scooped by Bernadette Cassel
April 1, 2013 4:59 PM
Scoop.it!

Little did we know about beetle diversity: Astonishing 138 new species in a single genus

Little did we know about beetle diversity: Astonishing 138 new species in a single genus | Insect Archive | Scoop.it

 

The tropics are home to an extraordinary diversity of insect species. How great is it, exactly?

 

Bernadette Cassel's insight:

 

Les tropiques abritent une extraordinaire diversité d'espèces d'insectes dont nous ne connaissons pas l'ampleur. Des chercheurs du Muséum d'Histoire naturelle de Santa Barbara ont publié une étude sur des coléoptères tropicaux de la famille des Histeridae.

 

Ils ont nommé 138 nouvelles espèces rien que dans le seul genre Operclipygus. Leur travail est basé sur une étude de plus de 4 000 spécimens qu'ils ont recueillis dans les musées d'histoire naturelle partout dans le monde ou qu'ils ont eux-mêmes collectés sur le terrain en Amérique centrale et en Amérique du Sud. 

 

(d'après le résumé et le début de l'article)

 

No comment yet.
Scooped by Bernadette Cassel
March 31, 2013 1:51 PM
Scoop.it!

BionicOpter, le robot libellule de Festo

 

With the BionicOpter, Festo has technically mastered the highly complex flight characteristics of the dragonfly. Just like its model in nature, this ultralight flying object can fly in all directions, hover in mid-air and glide without beating its wings.

 

No comment yet.
Scooped by Bernadette Cassel
March 30, 2013 6:52 PM
Scoop.it!

Insect Dissection - How Insects Work

A clip from the BBC Four programme, featuring researchers from Rothamsted Research
Bernadette Cassel's insight:

 

Vidéo réalisée par la British Broadcasting Corporation, dans laquelle des scientifiques examinent les antennes d'insectes pour voir comment ils sentent et comment ils détectent des produits chimiques tels que les phéromones.


(d'après Bioécologie http://bioecologie.over-blog.com/article-video-on-how-insects-smell-116675082.html)

No comment yet.
Scooped by Bernadette Cassel
March 30, 2013 1:45 PM
Scoop.it!

Aid to the identification of insects in 2 volumes

Aid to the identification of insects in 2 volumes | Insect Archive | Scoop.it


Preface (Extract): 

 

In issuing this first volumo of "Aid", I wish to call attention to the following sentence in my Prospectus, viz: - "There will be a Systematic Index, together with such remarks on the insects as may appear absolutely necessary, but the Editor is anxious to avoid adding to the already voluminous Entomological Literature ; the present work being intended to elucidate that which has been already written."

 

[Aide à l'identification des insectes en 2 vol. illustrés,1880-1882, 400 p. à télécharger | W.A.S./mahn-84]


Bernadette Cassel's insight:


SUR VARIÉTÉS ENTOMOLOGIQUES :

Musée Associatif d'Histoire Naturelle de L'Isle-sur-la-Sorgue (Vaucluse)


No comment yet.
Scooped by Bernadette Cassel
March 28, 2013 6:02 AM
Scoop.it!

Resurrecting the Rainbow Colors of Insect Fossils

Resurrecting the Rainbow Colors of Insect Fossils | Insect Archive | Scoop.it
After smashing, baking, and decaying the colorful outer layers that give some insects their sheen, scientists studying fossilized insects think they're closer to deciphering the original hues of today's dull and dark insect fossils.
Bernadette Cassel's insight:

 

Ressusciter les couleurs iridescentes des insectes fossiles

 

No comment yet.
Scooped by Bernadette Cassel
March 25, 2013 6:59 PM
Scoop.it!

Scientists use DNA to quickly unravel relationship between plants and insects

Scientists use DNA to quickly unravel relationship between plants and insects | Insect Archive | Scoop.it
It can take years of direct observation for a researcher to fully understand the diets of a community of herbivorous insects in a tropical rain forest.
Bernadette Cassel's insight:

 

L'étude de la relation entre les plantes et les insectes qui s'en nourrissent est une tâche ardue, car elle ne peut être menée que par l'observation directe. Cela peut prendre des années pour un chercheur de bien comprendre le régime alimentaire d'une communauté d'insectes herbivores dans une forêt tropicale.

 

Cinq scientifiques ont trouvé un moyen plus rapide en utilisant l'ADN trouvé à l'intérieur estomac de l'insecte, ce qui pourrait ramener à quelques mois les années de recherche. Cette méthode aidera les scientifiques à comprendre l'écologie et l'évolution des interactions plantes-herbivores de manière plus efficace.

 

(d'après le résumé de l'article)

 

No comment yet.
Scooped by Bernadette Cassel
March 26, 2013 11:59 AM
Scoop.it!

BBC Four - BBC Four Trails, BBC Four - Alien Nation

BBC Four - BBC Four Trails, BBC Four - Alien Nation | Insect Archive | Scoop.it
BBC Four gets up close and personal with the insect kingdom in a series of documentaries.
Bernadette Cassel's insight:

 

BBC Four diffuse une nouvelle série documentaire en six parties sur le monde étrange des insectes : "Alien Nation"

 

No comment yet.
Rescooped by Bernadette Cassel from Plant, Insect and Microbe Interactions
March 25, 2013 6:20 AM
Scoop.it!

ScienceCast: Zombie Ants

New research at Penn State has revealed how infection by a parasitic fungus dramatically changes the behavior of tropical carpenter ants, causing them to bec...

Via David Hughes, The aphid team@INRA Rennes
Bernadette Cassel's insight:

 

En infectant des fourmis charpentières tropicales, un champignon parasite change leur comportement. Il en fait des sortes de zombis qui vont aller mourir là où les conditions de reproduction sont optimales pour le champignon.

 

(d'après le commentaire de la vidéo)

 

 

SUR ENTOMONEWS :

 

→ Des fourmis-zombies découvertes au Brésil

http://sco.lt/4yQLmj

 

No comment yet.
Scooped by Bernadette Cassel
March 22, 2013 1:26 PM
Scoop.it!

Monarch Population Status

Monarch Population Status | Insect Archive | Scoop.it

 

While some of the present decline can certainly be attributed to the seasonal conditions last summer, it is the decline of monarch habitats in the United States and Mexico that is the major concern.

 

The good news is that we can do something about the habitats in the United States and Canada – we can plant milkweed.

 

That said, in order to compensate for the continued loss of habitat we need to plant LOTS AND LOTS of milkweed. To assure a future for monarchs, conservation and restoration of milkweeds needs to become a national priority.

 

Bernadette Cassel's insight:

 

via Flora Urbana http://floraurbana.blogspot.ca/2013/03/place-roy-place-du-monarque.html

 

« Pour contrer la baisse des populations du papillon, Monarch's Watch recommande de planter de l'asclépiade. ... »

 

SUR LE MÊME SUJET :

 

→ We really don’t know why monarch butterflies are disappearing

http://myrmecos.net/2013/03/20/we-really-dont-know-why-monarch-butterflies-are-disappearing-this-year/

 

→ An aerial view of the problem

http://myrmecos.net/2013/03/21/an-aerial-view-of-the-problem/#comment-65713

 

No comment yet.
Scooped by Bernadette Cassel
March 20, 2013 2:50 PM
Scoop.it!

7 Most Beautiful Butterflies on Earth

7 Most Beautiful Butterflies on Earth | Insect Archive | Scoop.it

 

1) Purple Spotted Swallowtail

The Purple Spotted Swallowtail is without a doubt one very beautiful example, whose habitat is under ever more threat. Found only in the highlands of New Guinea, this lovely butterfly, of the Papilionidae family, is becoming scarcer as mankind encroaches more on the forests where it is found.

 

Bernadette Cassel's insight:

 

via LEPIDOPTEROPHILE - LEPIDOPTEROLOGY - Butterflies http://sco.lt/89fi2T

 

No comment yet.
Rescooped by Bernadette Cassel from InsectNews
March 18, 2013 7:29 PM
Scoop.it!

Vasslöparen – en färggrann övervintrare

Vasslöparen – en färggrann övervintrare | Insect Archive | Scoop.it

Under flera vintrar har Stanislav och jag begett oss ut bland vass och kaveldun i jakt på en vacker skalbagge som går under namnet vasslöpare, Odacantha melanura. I år lyckades vi slutligen hitta den, på en liten sjö i närheten av Tullinge söder om Stockholm!


Via Matti Virtala
Bernadette Cassel's insight:

 

Sortir dans la nature et photographier de vrais insectes vivants, l'hiver, en Suède.

 

No comment yet.
Scooped by Bernadette Cassel
March 16, 2013 7:08 PM
Scoop.it!

Les 50 photos les plus parfaites de l'instant précis ! [en anglais]

Les 50 photos les plus parfaites de l'instant précis ! [en anglais] | Insect Archive | Scoop.it

By Internet standards, a perfectly timed photo occurs when two of the following three conditions are met:

 

1. Perfect Place

2. Perfect Time

3. Perfect Angle

 

Sometimes the holy trinity of perfectness is achieved and you get an Internet classic like so many of the photographs below. .../...

Bernadette Cassel's insight:

 

 (via Twitter https://twitter.com/pierrekerner/status/311907503136972800)

 

 

No comment yet.