[ezg] Black crested mangabey defensive vegetation

From: Rick Merkx <r.merkx@xxxxxxxxx>
To: "ezg@xxxxxxxxxxxxx" <ezg@xxxxxxxxxxxxx>
Date: Tue, 22 Jun 2021 17:59:19 +0000

Dear collegues,

Hope you are all doing well and kindly hope most of your zoos have reopened at
the moment. It's been a hard time but the future is bright with the current vax
numbers. Hopefully we will all enjoy guests in our parks like before soon!
Besides this there is a slight problem we are trying to solve back in the
Beekse Bergen Safaripark.

In the season of 2019 we've planted three Caucasian walnut Pterocarya
fraxinifolia at one of the Beekse Bergen Western gorilla islands, in close
consultation with both Apenheul and GaiaZoo. It's a tree species gorillas seem
nog interested in, especially the new growth. Now our gorillas share their
island with black crested mangabey Lophocebus aterrimus. Past two seasons the
trees did well but at the moment these trees are hunted by the mangabeys. The
trees are provided with some hotwire fences which prevents the gorillas from
getting on to them, which worked for the mangabeys as well but the introduction
of a new male and his current offspring manage to pass it. For now we are
planning on hotgrass as an extra defense, but we are not entirely convinced
this will be the complete solution. Therefore I want to improve it also with
some defensive vegetation.

Currently there is also some goat willow Salix caprea and barberry Berberis
julianea at the island which they seem to leave alone. Berberis in that way
could be the answer to my question , but I was wondering any of you have some
brilliant methods of providing protection to our trees. Two of them are in
worrisome state... Hopefully you can call me some proven suggestions?

Would love to hear from you. Kind regards,

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Met vriendelijke groet,
Libéma

Rick Merkx
Ontwerper

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Follow-Ups:
- [ezg] Re: Black crested mangabey defensive vegetation
  - From: Ton Hilhorst
- [ezg] Re: Black crested mangabey defensive vegetation
  - From: Stephen Butler

[ezg] Black crested mangabey defensive vegetation

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