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Veejoolsade
Question de Veejoolsade


Le saviez-vous



45° à l’ombre


Pour se défendre contre leur prédateur, le frelon asiatique, les abeilles ont trouvé une technique surprenante : l’hyperthermie.

Détails :

En effet le frelon asiatique, Vespa velutina, succombe à une température de 45°C alors que les abeilles peuvent supporter jusqu’à 50°C. Lorsqu’une ruche est menacée par ce redoutable prédateur, les ouvrières s’agglutinent en boule autour de l’assaillant et font monter la température par les vibrations de leurs ailes. L’inconvénient de cette méthode est qu’elle affaiblit la ruche, les ouvrières utilisant leur énergie en défense au lieu d’accomplir leurs tâches quotidiennes. De plus Apis mellifera, notre abeille européenne, n’ayant eu à affronter ce frelon venu d’Asie que récemment, maîtrise moins bien cette technique qu’Apis cerana, sa consoeur asiatique.
Sources :
Cnrs.fr – Des abeilles étouffeuses de frelons


Il y a
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5 ans
Meilleure réponse
Missjacqueline

C'est quand même rusé les animaux


Il y a
Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 9

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15
5 ans
Réponses (5)
Claudine670
Elles sont malignes ces abeilles !

Il y a
Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 9

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15
5 ans

Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/question.php on line 1155
Claudine670
Pour l'explication, je crois que j'avais déjà lu ça quelque part.

Il y a
Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 9

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15
5 ans

Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/question.php on line 1155
Missdebrouille
Très intelligentes ça on le savait à ce point chapeau faut faire breveté

Il y a
Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 9

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15
5 ans

Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/question.php on line 1155
Missjacqueline
Bonjour miss et bonne journée. Je te remercie poru avoir sélectionner ma réponse et cette petite anecdocte

Il y a
Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 9

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/inc/function-question-reponse.inc.php on line 15
5 ans

Warning: mktime(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/web/elleraconte.com/www/question.php on line 1155
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