[Syrphidae] Re: Syrphids as invasive species

[Cyrille DUSSAIX]

Hi,

Especially the pictures of 5485943, 5485944 (perhaps ?), 5485945, 
5485946 are not syrphid larvae but Cecidomyiidae...

Happy New Year.


Le 06/01/2015 17:28, Francis Gilbert a écrit :
>
> The list doesn't look like a list of invasives, but of a random set of 
> pictures including a lot of invasives.
>
> Surely most invasive species have colonised because of humans, whether 
> deliberate or not, so the distinction does not seem to be a useful 
> one. The key point is that most colonisations fail, however they occur 
> in the forst place: it is the successful ones that become 'invasives' 
> and the reasons for that success are interesting and worth studying.
>
> Francis
>
> *From:*syrphidae-bounces at lists.nottingham.ac.uk 
> [mailto:syrphidae-bounces at lists.nottingham.ac.uk] *On Behalf Of *ximo 
> mengual sanchis
> *Sent:* 06 January 2015 16:20
> *To:* Hoverfly discussion list
> *Subject:* [Syrphidae] Syrphids as invasive species
>
> Dear all,
>
> I would like to continue with the discussion on introduced species, 
> and if some of them may be considered 'invasive'.
>
> In the webpage invasive.org <http://invasive.org>, dealing with 
> invasive species for USA, there is a list of syrphids: 
> http://www.invasive.org/browse/TaxImages.cfm?fam=475
>
> I have a special interest in /Simosyrphus grandicornis/, which has 
> been introduced to a number of Polynesian Islands and Hawaii. So, if 
> this species has been introduced by humans, why now consider it as 
> invasive?
>
> Does anyone have more information about the introduction of /S. 
> grandicornis/ or its invasiveness?
>
> Thanks for the helpful comments.
>
> Best wishes,
>
> Ximo
>
> ********************************************************
> Dr. Ximo Mengual
> Head of the Diptera Section
> Stiftung Zoologisches Forschungsmuseum Alexander Koenig
> Leibniz-Institut für Biodiversität der Tiere
> Adenauerallee 160
> D-53113  Bonn, Germany
> Phone: 0049 (0)228 9122 292
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>
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