The evolution of fish has been a very interesting topic to study. The main cause of fish evolution is selection; selection in the fact that the best featured or best adapted species are more likely to survive while those without these traits are eliminated. In these paper, we discuss researches by two people who have studied how human beings have an effect on these selective pressures causing artificial selection of fish.
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Both of these researches base reproduction as closely related to age, size of a species and growth rates.
Enberg, K, C Jorgensen and M Mangel. “Fishing Induced Evolution and Changing Reproductive Ecology of Fish: The Evolution of Steepness.” Canadian Journal of Fisheries & Aquatic Sciences (2010): 67. Article.
Reznick, D N and C K Ghalambor. “Can Commercial Fishing Cause Evolution? Answers Frome Gruppies (PoecILia reticulata).” Canadian Journal of Fisheries & Aquatice Sciences (2005): 62. Article.