Observation n° 368837 Ischnura pumilio
Informations
Donnée considérée certaine, très probable
Source de la donnée : Terrain
Type de donnée : Publique
Date : 16/05/2021
Date de saisie : 17/05/2021
Localisation
Le Gentilhomme - Chantonnay (85)
Observateur(s) (AER)
Détail de l'observation
Naturalité : Sauvage
- Adulte ( 1 ). Etat biologique : Observé vivant
Contact : Vu
Prospection : A vue
Statut biologique : Non renseigné
Comportement : Non renseigné
Déterminateur : Didier GODREAU
Remarque : appendices anaux clairs + grands ptérostigmas clairs aile antérieure + petits ptérostigmas clairs aile postérieure
UUID SINP : 67f8c431-52e0-4bda-8b29-b822f9d4242b
Photo(s)
© GODREAU Didier - Adulte
Commentaire(s)
Par Bertrand PINEY, 17/05/2021 - 19:03
Didier, je réponds à ta question précédente... sur l’obs 85935. La phase "aurantiaca" (orange pétant) intervient juste après l’émergence et avant le stade illustré par ton cliché : R. Seidenbusch 1995. Dichromism in females of Ischnura pumilio (Charpentier), with special reference to homeochromic females. Journal of the British Dragonfly Society 11 (1): 21-22. https://british-dragonflies.org.uk/wp-content/uploads/2019/08/JBDS_Vol11no1.pdf ---- 3. During maturation, heterochromic females undergo a single colour change, from orange (aurantiaca) to green; homeochromic females have a double colour change, passing from orange to green and then from green to blue. Tricoloured individuals in changing phase were seen. 4. Homeochromic and heterochromic females both arise from immature orange females. ---- Voir aussi : Cham, S. A. 1993. Further observations on generation time and maturation of Ischnura pumilio with notes on the use of a mark-recapture programme. Journal of the British Dragonfly Society 9 (2): 40- 46. https://british-dragonflies.org.uk/wp-content/uploads/2019/08/JBDS_Vol9no2.pdf ---- In order to establish time points for age--related colour changes it was important to recapture individuals marked as tenerals at the time of transition between the immature Aurantiaca form and the green/brown mature form. During the study, 24 females were recaptured at various time points which allowed the duration of the maturation process to be determined (Table 1 ). There appeared to be some degree of variation in the various stages which may be attributed to weather conditions and the availability of food. Table 1. Time period of female maturation Teneral---Aurantiaca---Intermediate---Mature 1 DAY-----5-9 DAYS------2 DAYS-----------up to 26 DAYS ----
Par Bertrand PINEY, 17/05/2021 - 19:31
J'ai recopié ce que j'avais écrit sur le forum du monde des insectes, mais ça ne sort pas très bien... (Voir page 2). https://www.insecte.org/forum/viewtopic.php?t=213116
Par Didier GODREAU, 17/05/2021 - 19:58
un très grand MERCI Bertrand pour toutes ces infos qui me permettent d'en apprendre beaucoup , et à identifier pour le futur ! bonne soirée >> finalement ce pumilio semble difficile à trouver , j'ai donc eu un coup de bol !!!
Par Bertrand PINEY, 17/05/2021 - 19:03
Didier, je réponds à ta question précédente... sur l’obs 85935. La phase "aurantiaca" (orange pétant) intervient juste après l’émergence et avant le stade illustré par ton cliché : R. Seidenbusch 1995. Dichromism in females of Ischnura pumilio (Charpentier), with special reference to homeochromic females. Journal of the British Dragonfly Society 11 (1): 21-22. https://british-dragonflies.org.uk/wp-content/uploads/2019/08/JBDS_Vol11no1.pdf ---- 3. During maturation, heterochromic females undergo a single colour change, from orange (aurantiaca) to green; homeochromic females have a double colour change, passing from orange to green and then from green to blue. Tricoloured individuals in changing phase were seen. 4. Homeochromic and heterochromic females both arise from immature orange females. ---- Voir aussi : Cham, S. A. 1993. Further observations on generation time and maturation of Ischnura pumilio with notes on the use of a mark-recapture programme. Journal of the British Dragonfly Society 9 (2): 40- 46. https://british-dragonflies.org.uk/wp-content/uploads/2019/08/JBDS_Vol9no2.pdf ---- In order to establish time points for age--related colour changes it was important to recapture individuals marked as tenerals at the time of transition between the immature Aurantiaca form and the green/brown mature form. During the study, 24 females were recaptured at various time points which allowed the duration of the maturation process to be determined (Table 1 ). There appeared to be some degree of variation in the various stages which may be attributed to weather conditions and the availability of food. Table 1. Time period of female maturation Teneral---Aurantiaca---Intermediate---Mature 1 DAY-----5-9 DAYS------2 DAYS-----------up to 26 DAYS ----
Par Bertrand PINEY, 17/05/2021 - 19:31
J'ai recopié ce que j'avais écrit sur le forum du monde des insectes, mais ça ne sort pas très bien... (Voir page 2). https://www.insecte.org/forum/viewtopic.php?t=213116
Par Didier GODREAU, 17/05/2021 - 19:58
un très grand MERCI Bertrand pour toutes ces infos qui me permettent d'en apprendre beaucoup , et à identifier pour le futur ! bonne soirée >> finalement ce pumilio semble difficile à trouver , j'ai donc eu un coup de bol !!!