Aliens Newsletter - ISSG
Aliens Newsletter - ISSG
Aliens Newsletter - ISSG
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census had been previously made. The only occasion<br />
where I have used poison was in St. Helena, under<br />
Professor’s C. Feare leadership.<br />
Table IV. Birds per trap type and island.<br />
Data regarding birds of the six campaigns and by<br />
islands can be found in Table V. All common myna<br />
population lower than 50 individuals have been<br />
eradicated from the environment (Tenerife, Gran<br />
In islands with a population superior to 1.000 individuals<br />
– Santa Helena and Ascension – these<br />
were reduced by 4% and 56, 5% respectively. This<br />
difference depends entirely on the estimated<br />
quantity of birds present in each island. In Santa<br />
Helena the proposed population calculated by Prof.<br />
Results<br />
Traps and their captures are reflected in Table IV.<br />
Tenerife Gran Canaria Mallorca Fuerteventura St<br />
Helena<br />
Ascension<br />
Total per<br />
traps<br />
SRT (same trap)<br />
SDT (one trap per<br />
9 2 12 20 - - 43<br />
island) - - - - 161 53 214<br />
LDT (one trap) - - - - 78 - 78<br />
FT (one trap per<br />
island)<br />
MMT( two traps in<br />
- - - - 42 222 264<br />
one island) - - - - - 345 345<br />
By hand 1 1 1 1 1 3 8<br />
Total birds per islands 10 3 13 21 282(*) 623 952<br />
Table V. Bird census, before and after campaigns, up to December 2009.<br />
Canaria y Mallorca) except in Fuerteventura,<br />
where some few birds remained free and it will<br />
necessary to do a new control campaign (in preparation).<br />
Birds by island Te nerife Gran<br />
Canaria<br />
Mallorca Fuerteventura St Helena Ascension<br />
Estimated at beginning 12 3 12 30 8.000-10.000 1.100<br />
Captured<br />
camp aign<br />
during 10 3 10 24 351 623<br />
Free birds after campaign 2 0 7 4 8.000-10.000 477<br />
Free birds in D ecember<br />
2009<br />
(*) 0 0 >4 8.000-10.000 >477<br />
(*) In Tenerife, information on myna sights after the first campaign has been very vague on whereabouts in order to<br />
make a follow-up. The QRT has not seen nor caught any free myna in Tenerife since 2000 up to date. There have been<br />
notes on sights in various local ornithological yearly reports which have not been able to be confirmed.<br />
Feare was between 8.000 and 10.000 birds, and in<br />
Ascension it was estimated in around 1.100 mynas.<br />
Coverage per island (Fig. 1) indicates the control<br />
on individuals amongst the population. If catches of<br />
<strong>Aliens</strong> 45
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