https://nofima.no/en/nyhet/2015/11/salmon-puberty-gene-discovered/
This research was conducted over a 40 year time period in which scales were collected and measured which gives a great amount of information of the size and age of the salmon. However, over time, their breeding age has become much younger and the gene that allows salmon to grow large has gotten been bred out while the gene for smaller size has become a common occurrence. This study revealed the gene, Vgll3, which controls the "puberty" of a salmon. The scientists figure out that age of the salmon and sexual maturity and connected to their size meaning that the quicker they age, the smaller they are and it seems to be more common. With this information, many different research topics can be covered, such as this is evidence that evolution can happen quickly or how salmon can benefit from being a smaller size.
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