/sci/ - Science & Math

>>14792024
Ah I never found out if other research agreed with Helgason's 2008 paper on birthrates in Iceland. Do you know any?
His figures based on 200 years of Icelandic birth and marriage records showing highest fertility among couples of relatedness around 3rd cousin

>>11966930
>it is also the ability to survive to breeding age and the ability for children to survive to breeding age.
actually the iceland stufy is quite interesting in that regard, it's fairly short
Helgason, A., Palsson, S., Guthbjartsson, D. F., Kristjansson, t., & Stefansson, K. (2008). An Association Between the Kinship and Fertility of Human Couples. Science,
https://files.catbox.moe/m7d882.pdf
first notch is equivalent to 2nd cousin or closer effective relatedness, second notch 3rd cousin or closer, etc, etc.

reminder that 3rd-4th cousins are optimal

this is a genetic pattern in human fertility that is replicated across species even in plants and fish and presents a mechanism for stabilisation.

>>11265272

>>11269067
around the 3rd cousin is optimal according to Helgason's icelandic birth record study