Origin of New SpeciesOrigin of New Species
Title rated 0 out of 5 stars, based on 0 ratings(0 ratings)
Downloadable Video, 2015
Current format, Downloadable Video, 2015, , All copies in use.Downloadable Video, 2015
Current format, Downloadable Video, 2015, , All copies in use. Offered in 0 more formatsWhen species exchange genes by interbreeding their morphological and genetic variation increases. Unusual or extreme variants are produced that could be the starting point of a new evolutionary trajectory leading to the formation of a new species. This program illustrates this with finches on Daphne. A hybrid male from the nearby island of Santa Cruz immigrated to Daphne. It was larger than the parental species, Medium Ground and Cactus Finches, it sang a unique song, and had a rare genetic marker. It bred with locally hatched Medium Ground Finches. After several years all members of this new lineage died in a severe and prolonged drought, except for a brother and a sister. These bred with each other, and so did their offspring. The new lineage is behaving as a new species by not breeding with any of the other finches on the island. It has retained the characteristics of large size, unique male song, and the rare genetic marker. After seven generations its future is uncertain in this strongly fluctuating environment, but it serves as an illustration of how hybridization can contribute to the formation of new phenotypes and the development of a new species.
Title availability
About
Media summary
Language
- Closed-captioned.
Contributors
- Film distributor
- Production company
Details
Publication
- [Place of publication not identified] : Peter and Rosemary Grant, [2015], New York, N.Y. : distributed by Films Media Group, 2015., ©2015
Opinion
More from the community
Community lists featuring this title
There are no community lists featuring this title
Community contributions
Community quotations are the opinions of contributing users. These quotations do not represent the opinions of Whistler Public Library.
There are no quotations from this title
Community quotations are the opinions of contributing users. These quotations do not represent the opinions of Whistler Public Library.
There are no quotations from this title
From the community