Alvares, Rahul; Natural history -- India -- Anecdotes
In the garage of the building was the Spider Room-a laboratory of sorts
filled with bottles of different spiders in various stages of growth.
There must have been over 500 transparent plastic bottles at the time I
was there, each one neatly labelled, and all sitting one next to the
other with spiders in them. For air, each bottle had tiny pinholes in
its lid. Feeding was done through another small hole in the lid: this
hole was plugged with cotton. All these spiders and their activities
including growth, moulting, mating and hatching of babies were
monitored by Dr Vijayalakshmi. She had an assistant called Selvan and
he followed her instructions, keeping the records and making the
notings in a log book.
During the fortnight that I worked with Dr Vijayalakshmi, I simply
slipped into this set-up, reading books about spiders that Dr
Vijayalakshmi gave me, then learning to identify different spiders and
simultaneously helping Selvan in all the tasks that were needed to
maintain the huge spider population housed in the garage.
The spiders that Dr Vijayalakshmi deals with are called giant crab
spiders. These spiders do not build webs. They feed only on
cockroaches. The spiders were a little smaller than their prey i.e. the
cockroaches. I used to separate the babies, feed them, check the
moultings and catch flies for feeding them. I read a lot of books here
and sometimes caught the spiders in the garden in order to identify and
study them.
Spiders were not the only creatures housed in the garage. There were
also cockroaches bred in buckets with rolled cardboard in the centre
and broken biscuit pieces thrown in the bucket. The cockroaches were
fed once a week or so to the giant crab spiders.
The smaller spiders used to get flies to eat and these were caught by
us everyday from the garden. The flies have to be fed alive to the
spiders, so we used transparent plastic bottles to trap the flies and
once caught we would carefully put them into the spider's bottle.
Sometimes the spider would immediately catch the prey and eat it; at
other times the fly would buzz around in the bottle for days till the
spider was ready to eat it.
Dr Vijayalakshmi also bred a particular species of fly in a small cage
with fine mesh with a small saucer of milk in the centre as a medium
for breeding.
Baby spiders were also housed individually in bottles and these were
fed fly larvae or the larvae which come when maida or rava begins to
lose its freshness.
The purpose of all these experiments was to find out which types of
spiders were useful for using as pest control agents to deal with
cockroaches. Information about spiders such as their growth, hardiness,
their eating habits, reproduction etc. are important indicators of the
species of spiders that can be kept in houses as predators for
cockroaches.
Public-domain text, read in full here on John Shaqi.
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