There is a fig. The two density populations have variation and selection. After a series of simulations, the distribution of the allele frequency difference between captured and escaped fish was found. The dark line shows the threshold based on the Bonferroni-corrected zdAF. The distribution of the genomic PC score of the outliers of captured and escaped fish after a series of trawling simulations was shown in the picture. There is a significant difference among the conditions. Credit is given to 10.1073/pnas.2020833118
If not carefully managed, commercial fishing may be responsible for genetic changes and affect population resilience.
The University of Glasgow led a study that looked at how commercial fishing practices impact the genetic evolution of fish populations.
There is no "one size fits all" impact of fishing on species evolution according to a study. The effects appear to be dependent on a number of factors, which must now be taken into account.
Reduced body size and/or age and size at maturation have been shown to be altered by intensive commercial fishing. The results of the study show that while commercial fishing techniques remove fish with certain characteristics, the specific genes under fishing selection differ depending on the density of the targeted population.
The fish with a lower capacity for swimming were found to be the most vulnerable to be captured, while the fish with a higher capacity for aggressiveness were found to be the most vulnerable. The affected genes were related to brain function and development. As fished populations decline, researchers believe the evolutionary consequences of fishing are likely to be different.
The results of the study show the need to consider environmental factors when predicting the evolution of fish populations.
Our study shows that different fish populations of different sizes will respond differently to fishing selection. As a population is fished over time, the genes under selection may change. This could affect population resilience.
Prof Killen said that it was critical that both ecological and genomic factors were considered to fully understand and predict the consequences of human-induced selection on the resilience of natural populations. The results show that the interactions are more complex than previously thought.
The paper "Genomic basis of fishing-associated selection varies with population density" was published in PNAS.
Amélie Crespel and her team show that the Genomic basis of fishing-associated selection varies with population density. There is a book titled "10.1073/pnas. 2020833118."
The National Academy of Sciences has a journal.
Commercial fishing in reduced fish populations may cause genetic changes.
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