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Gerak kaki dan
coating kaki
non-stick membantu laba-laba tidak lengket ke jaring mereka sendiri
Peneliti
bertanya mengapa laba-laba tidak menempel ke jaring lengket mereka sendiri.
Mengulangi studi tua, banyak dikutip, tapi kurang didokumentasikan dengan
peralatan modern dan teknik, mereka menemukan bahwa kaki laba-laba dilindungi
oleh penutup rambut yang bercabang dan non-stick coating kimia dan bahwa mereka
mengubah perilaku mereka untuk menghindari menjadi terjebak..........
Fancy footwork and non-stick leg coating helps spiders not stick to their
own webs
Date:
March 1,
2012
Source:
Smithsonian Tropical Research
Institute
Summary:
Researchers asked why spiders do not
stick to their own sticky webs. Repeating old, widely quoted but poorly
documented studies with modern equipment and techniques, they discovered that
spiders' legs are protected by a covering of branching hairs and by a non-stick
chemical coating and that they modify their behavior to avoid getting stuck.
..........................
Researchers at the Smithsonian Tropical Research Institute
and University of Costa Rica studying why spiders do not stick to their own
sticky webs have discovered that a spider's legs are protected by a covering of
branching hairs and by a non-stick chemical coating.
They also
observed that spiders carefully move their legs in ways that minimize adhesive
forces as they push against their sticky silk lines hundreds to thousands of
times during the construction of each orb.
The web-weaving
behavior of two tropical species, Nephila clavipes and Gasteracantha
cancriformis, was recorded with a video camera equipped with close-up
lenses. Another video camera coupled with a dissecting microscope helped to
determine that individual droplets of sticky glue slide along the leg's bristly
hair, and to estimate the forces of adhesion to the web. By washing spider legs
with hexane and water, they showed that spiders' legs adhered more tenaciously
when the non-stick coating was removed.
Their results
are published online in the journal, Naturwissenschaften.
Story
Source:
The above
story is based on materials provided by Smithsonian Tropical Research Institute. Note: Materials may be edited
for content and length.
Journal
Reference:
- R. D. Briceño, W. G. Eberhard. Spiders avoid sticking to their webs: clever leg movements, branched drip-tip setae, and anti-adhesive surfaces. Naturwissenschaften, 2012; DOI: 10.1007/s00114-012-0901-9
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