The mechanism of speciation
Transcript of The mechanism of speciation
![Page 1: The mechanism of speciation](https://reader036.fdocuments.in/reader036/viewer/2022072806/62e11b2790c3ff78a102abc4/html5/thumbnails/1.jpg)
The mechanism of speciation
Sexual and natural selection of Dendrobates pumilio
![Page 2: The mechanism of speciation](https://reader036.fdocuments.in/reader036/viewer/2022072806/62e11b2790c3ff78a102abc4/html5/thumbnails/2.jpg)
Picture: Archipelago „Bocas del Toro“ in Panama
Sexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilio
![Page 3: The mechanism of speciation](https://reader036.fdocuments.in/reader036/viewer/2022072806/62e11b2790c3ff78a102abc4/html5/thumbnails/3.jpg)
Picture left: Plasticine-modells of Dendrobates pumilio
Picture top-right: Eggs of D. pumilio
Picture bottom-right: Frog with polliwog on his back
Sexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilioSexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilio
![Page 4: The mechanism of speciation](https://reader036.fdocuments.in/reader036/viewer/2022072806/62e11b2790c3ff78a102abc4/html5/thumbnails/4.jpg)
Experiment 1:
● Males from two different populations in glas case
● One call from speaker
● Female mate choice
Sexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilioSexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilio
![Page 5: The mechanism of speciation](https://reader036.fdocuments.in/reader036/viewer/2022072806/62e11b2790c3ff78a102abc4/html5/thumbnails/5.jpg)
Experiment 2:
● Two different calls for mate choice
● Plasticine-models
Sexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilioSexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilio
![Page 6: The mechanism of speciation](https://reader036.fdocuments.in/reader036/viewer/2022072806/62e11b2790c3ff78a102abc4/html5/thumbnails/6.jpg)
Results
● Females prefer their similar phenotype
● Call is more important than color
● Natural selection and sexual selection lead to speciationwithout geographical isolation
Sexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilioSexual selection of Sexual selection of Dendrobates pumilioDendrobates pumilio