I think there are few studies that directly estimate the supply curve or its price elasticity, but you can instead often infer the sign of the price elasticity of supply from common model assumptions + stock/fishery data, which are more widely available.
It’s worth mentioning that wild animal effects can also make us clueless or pessimistic about interventions that reduce the production of terrestrial animal products, e.g. diet change and alternative proteins, I think mostly because of land use effects on wild animal populations.
These issues are discussed in https://reducing-suffering.org/#fishing (largely from a suffering-focused/negative utilitarian perspective), especially:
https://reducing-suffering.org/should-fishing-opponents-be-happy-about-overfishing/
https://reducing-suffering.org/wild-caught-fishing-affects-wild-animal-suffering/
https://reducing-suffering.org/marine-trophic-level-contains-total-suffering/
On what Peruvian anchoveta eat, see https://en.wikipedia.org/wiki/Peruvian_anchoveta#Description , and Peruvian anchoveta account for 20-40% of fishmeal produced from whole wild-caught fish depending on the year, if I recall correctly.
For more on the kinds of models used by fishery experts:
https://en.wikipedia.org/wiki/Maximum_sustainable_yield
https://haddonm.github.io/URMQMF/
For some direct estimates of price elasticity of supply for anchovies that came out negative, from Vietnam:
https://munin.uit.no/bitstream/handle/10037/6370/article.pdf;jsessionid=4E475668FEFAD00890D8766F0595DD81?sequence=1 / https://www.ccsenet.org/journal/index.php/jsd/article/view/27124 (they don’t directly report elasticities, but you can derive these from their models or check that supply is a decreasing function of price)
https://folk.ntnu.no/skonhoft/EDE%20Middlmen%200519.pdf , based on http://www.rimf.org.vn/ctkhcn/chitiet/TAYNAMBO
I think there are few studies that directly estimate the supply curve or its price elasticity, but you can instead often infer the sign of the price elasticity of supply from common model assumptions + stock/fishery data, which are more widely available.
It’s worth mentioning that wild animal effects can also make us clueless or pessimistic about interventions that reduce the production of terrestrial animal products, e.g. diet change and alternative proteins, I think mostly because of land use effects on wild animal populations.