Device to measure accumulated light exposure

EffordM EffordM at
Fri Nov 14 09:18:19 EST 1997

Our study animals are nocturnally active brushtail possums. We would like to 
index the quality (i.e. darkness) of their individual daytime den sites by 
attaching a device to each that accumulates their exposure to daylight. 
Ideally this would  log daily exposure, but a total over several weeks would 
be OK. We would download data on recapture. The package must be 
miniaturizable (limit ca 30 g). I would be glad to hear of any existing 
circuit or device that might serve this purpose, or could be adapted.

Murray Efford
Manaaki Whenua - Landcare Research
New Zealand

effordm at
Phone +64 3 479 9681
Fax   +64 3 477 5232

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