[Mastwatch] West Kal Mast

Lord Cranbrook lordcranbrook at greatglemhamfarms.co.uk
Fri Mar 1 13:39:00 PST 2019

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

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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