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2015 ; 4
(10
): 1326-9
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Prey interception drives web invasion and spider size determines successful web
takeover in nocturnal orb-web spiders
#MMPMID26405048
Gan W
; Liu S
; Yang X
; Li D
; Lei C
Biol Open
2015[Sep]; 4
(10
): 1326-9
PMID26405048
show ga
A striking feature of web-building spiders is the use of silk to make webs,
mainly for prey capture. However, building a web is energetically expensive and
increases the risk of predation. To reduce such costs and still have access to
abundant prey, some web-building spiders have evolved web invasion behaviour. In
general, no consistent patterns of web invasion have emerged and the factors
determining web invasion remain largely unexplored. Here we report web invasion
among conspecifics in seven nocturnal species of orb-web spiders, and examined
the factors determining the probability of webs that could be invaded and taken
over by conspecifics. About 36% of webs were invaded by conspecifics, and 25% of
invaded webs were taken over by the invaders. A web that was built higher and
intercepted more prey was more likely to be invaded. Once a web was invaded, the
smaller the size of the resident spider, the more likely its web would be taken
over by the invader. This study suggests that web invasion, as a possible way of
reducing costs, may be widespread in nocturnal orb-web spiders.