[Mastwatch] West Kal Mast

Siew Te Wong wongsiew at hotmail.com
Mon Mar 25 09:38:04 PDT 2019

Hi all,

I met the Sarawak delegates from Sarawak Forestry Department last week at the Heart of Borneo conference in KK. They are selling the Engkabang butter from this year's harvest. Looks like a good masting year in Sarawak.

Here are the locations during Jan-Feb 2019 engkabang harvest:

  *   Ulu Mujok, Jalau, Sarikei  -
  *   Ulu Engkari, Lubok Antu, Batang Ai
  *   Kanowit

They mentioned that they are expecting fruiting at Ulu Baram, and Miri area during April and above.

Here in Sepilok Forest Reserve, Sandakan, Sabah, many trees started to flowers. I expect next month will the flowering peak and July-August is the fruiting peak.

Attached with some photos of the engkabang harvesting in Sarawak.

Thank you.

Kindest regards,


Dr (Hon) Wong Siew Te, D.J.N.

C.E.O. and Founder,

Bornean Sun Bear Conservation Centre
email: wongsiew at hotmail.com<mailto:wongsiew at hotmail.com>

skype: wongsiew

Cell: 016-555 1256




"May all beings be happy, joyful, well, & at safety & peace!"

From: Mastwatch <mastwatch-bounces at lists.phylodiversity.net> on behalf of Katharine Pearce <katharinegeorgina at yahoo.co.uk>
Sent: Monday, March 25, 2019 8:52 PM
To: 'Ashton, Peter'; Lord Cranbrook
Cc: mastwatch at lists.phylodiversity.net; Peter C. Boyce
Subject: Re: [Mastwatch] West Kal Mast

Dear Mastwatchers,

very late in the day to state that there was reportedly a heavy fruiting of Engkabang (Shorea macrophylla) fruits in the Lundu area of Sarawak early this year (Jan/Feb). They are selling engkabang 'margarine' in Sibu market, apparently. Also I heard that there were several dipterocarp species fruiting in Kubah National Park. However, nothing doing on the Dryobalanops rappa  at Stutong Forest Park.

Peter Boyce has more first hand information for Sarawak, so I have cc'd him here.

Warm regards to all

Kit Pearce

On Saturday, 2 March 2019, 05:39:10 GMT+8, Lord Cranbrook <lordcranbrook at greatglemhamfarms.co.uk> wrote:

Responding to Peter Ashton

In Peninsular Malaysia, among swallows, the nesting season of resident Hirundo tahitca begins at the departure of  the migratory barn swallows Hirundo rustica. Forest insectivorous passerines may also be adapted to nest when migratory competitors for resources are absent.

In Peninsular Malaysia and Sarawak, many gregarious insectivorous bats of (dipterocarp) forest habitat have coordinated annual seasons of birth. typically April. Much more spectacular than the longer nesting seasons of insectivorous birds but probably for the same selective reason: seasonality among invertebrate prey.

But, being mammals, with a gestation period of several weeks or months, the environmental signals for mating and ovulation have to be earlier.

Among the flat-headed bats Tylonycteris  spp. of the Gombak valley, I concluded that the environmental signal for ovulation and implantation was the short period of 'drought' (>2 weeks without rain) and consequent high daily air temperatures occurring wth regularity  some time in January each year.

Can this seasonality explain mast events ?

So long ago !

From: Mastwatch [mailto:mastwatch-bounces at lists.phylodiversity.net] On Behalf Of Ashton, Peter
Sent: 01 March 2019 12:31
To: Cam Webb; mastwatch at lists.phylodiversity.net
Subject: Re: [Mastwatch] West Kal Mast

Hello Cam and Mastwatchers,

A couple of months ago I sent the attached note to the Malaysian Nature Journal: I would welcome your comments!



From: Mastwatch <mastwatch-bounces at lists.phylodiversity.net> on behalf of Cam Webb <cam_webb at yahoo.com>
Sent: Thursday, February 28, 2019 5:53:49 PM
To: mastwatch at lists.phylodiversity.net
Subject: Re: [Mastwatch] West Kal Mast

Thanks all, for the forest news from across Borneo (and beyond).

It seems the Gunung Palung mast was big: definitely biggest since Feb
2010, and maybe bigger than that one. Peak fruit fall was several weeks
ago. Dipterocarp flowering started in late Sept 2018. I¡¯ll post more
details when I know them.


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