2003 Lecture 13 Behavior and Communication.pdf

2003 Lecture 13 Behavior and Communication.pdf -...

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3/1/2017 1 Announcements Readings: Minor   project   due   March   3 Exam   3   March   8 Through   today’s   material Review   Session 6 Mar 8 14 Overwintering   and   Thermoregulation Chapter   16 Mar   1 Mar   6 8 Mar 15EXAM   2
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3/1/2017 2 ENTO   2003   Insects   and   Society Lecture   13:   Behavior,   Learning,   and   Communication Documented   Sexual   Cannibalism   Among   Spiders • Araneae Araneidae (24) Theridae (    2) Salticidae (    9) 11   Others   (14)
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3/1/2017 3 Male   Spiders   Mate   With   Their   Mouthparts
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3/1/2017 4 Latrodectus hasselti Australian   Red backer   Spider
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3/1/2017 5 Males   are   1 2%   of   female’s   mass Eating   of   male   does   not   increase   egg number   or   mass No   energetic   benefit Not   Food   But   Duration Fertilization   success   based   on   duration Cannibalized   males   copulated   25   minutes Non cannibalized   males   copulated   11   minutes Copulatory duration of 2nd male (min) 0 5 10 15 20 25 30 Paternity of 2nd male (%) 0.0 0.2 0.4 0.6 0.8 1.0 Results Females   not   likely   to   re mate   when   they   eat   a   male 67%   rejected   after   consuming   first   male 4%   rejected   after   not   consuming   first   male Spiders   support   suicide   male   hypothesis
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