Batty P. 2017

••• ❉ Odonates du Monde ❉ ••• world Odonata web Accueil - Les Odonates - le ⒷLOG Espèces - Genres - Familles - Classification (phylogénétique / officielle) - Dates - Pays - Thèmes 2026 - Actualités - Communiqués - Odonates en France [Espèces : A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - R - S - T - U - V - W - X - Y - Z - Fossiles Ŧ] 6515 espèces de Demoiselles et Libellules 14 106 articles - 1 071 espèces traitées ⚠ Avertissements ••• wOw ••• [Deliry C. 2026] – Batty P. 2017 - In : Odonates du Monde (Histoires Naturelles) (2004-[2026]) – Version 73012 du 06.01.2026. – odonates.net A voir (work)

---

Batty P. 2017 - Odonata monitoring for the Scottish Beaver Trial 2009-2014 with notes on the post-trial period. - J. of the British Dragonfly Society, 33 (2), octobre 2017 : 79-103. - BiB

---

Abstract
The British Dragonfly Society surveyed Brachytron pratense Hairy Dragonfly and Calopteryx virgo Beautiful Demoiselle for Scottish Natural Heritage (SNH) as part of the monitoring for the Scottish Beaver Trial 2009-2014. The beavers drastically reduced the aquatic vegetation in some lochs and constructed dams, increasing the size of one loch four-fold. At the end of the survey Brachytron pratense was still breeding at the affected lochs. The study period was too short to evaluate the full effects on this species. Although there was a decline in the numbers of larvae and exuviae at one of the lochs where there was high beaver activity there were no obvious trends at the other three. Since the trial, beavers have moved into new lochs and built dams on one burn. In 2016 Brachytron pratense was seen at all lochs and larvae found at the main lochs sampled. The Scottish Government’s decision is to allow beavers to remain in Scotland and spread naturally. Results from the survey of Calopteryx virgo have not been included as the beavers did not use the burns during the survey period. However, these data will be important for future monitoring.