Related topics: fish · climate change

West Coast sardine season called off amid population decline

Fisheries managers have decided to call off the West Coast sardine fishing season that starts in July because of rapidly dwindling numbers, hoping to save an iconic industry from the kind of collapse that hit in the 1940s ...

Endangered delicacy: Japan eel on species red list

(AP)—The Japanese eel, a popular summertime delicacy that has become prohibitively expensive due to overfishing, has been put on the international conservation "red list" in a move that may speed up Japan's push for industrial ...

The snowball effect of overfishing

Florida State University researchers have spearheaded a major review of fisheries research that examines the domino effect that occurs when too many fish are harvested from one habitat.

Study highlights snowball effect of overfishing

Florida State University researchers have spearheaded a major review of fisheries data that examines the domino effect that occurs when too many fish are harvested from one habitat.

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Overfishing

Overfishing occurs when fishing activities reduce fish stocks below an acceptable level. This can occur in any body of water from a pond to the oceans.

Ultimately overfishing can lead to resource depletion in cases of subsidised fishing, low biological growth rates and critical low biomass levels (e.g. by critical depensation growth properties). For example, overfishing of sharks has led to the upset of entire marine ecosystems.

The ability of a fishery to recover after overfishing depends on whether the ecosystem conditions are suitable for the recovery. Dramatic changes in species composition can result in an ecosystem shift, where other equilibrium energy flows involve species compositions other than those that had been present before. For example, once trout have been overfished, carp might take over in a way that makes it impossible for the trout to re-establish a breeding population.

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