Infants reacted with increased pupillary dilation indicating arousal to spiders and snakes compared with flowers and fish.
Infants’ pupillary responses linked to activation of the noradrenergic system were measured. Here, 6-month-old infants were presented with pictures of spiders and flowers (Study 1, within-subjects), or snakes and fish (Study 1, within-subjects Study 2, between-subjects). However, it is currently unclear whether these stimuli induce increased physiological arousal in infants.
2Faculty of Psychology, University of Vienna, Vienna, Austria.1Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.While many people feared the spiders, Mr Collett said they could be safely caught.Stefanie Hoehl 1,2*, Kahl Hellmer 3, Maria Johansson 3 and Gustaf Gredebäck 3 Mr Collett encouraged people to catch the spiders if they saw them crawling around. Females have less venom and spend almost all of their lives in their burrows. The park has about 500 male spiders in its anti-venom program, which they milk once a week for venom.
"It's a win for us because we need as many as we possibly can to produce enough venom for the anti-venom program here in Australia," Mr Collett said. He suspected recent weather had driven them out of their burrows. "Our peak period is normally spring and summer, which is when the males are cruising around chasing girls," Mr Collett told ABC Radio Sydney. The park's operations manager Billy Collett said the donations suggested the spiders were unusually active despite the cold weather.
Twelve funnel-webs - five males, five females, and two juveniles - caught by members of the public were recently dropped off in jars at Hawkesbury City Council in Sydney's north.
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