Fiskeridødelighed

Fiskeridødelighed refers to the mortality rate of fish caused by fishing activities. It encompasses both the fish that are caught and kept, known as landings, and those that are caught but released, often referred to as bycatch. Understanding and quantifying fiskeridødelighed is crucial for sustainable fisheries management, as it directly impacts the health and size of fish populations.

Various factors contribute to fiskeridødelighed. The intensity and type of fishing gear used play a significant role. Some fishing methods are more selective than others, meaning they catch a higher proportion of the target species and fewer non-target species or smaller individuals. The size of mesh in nets, for instance, can influence which fish escape capture. Furthermore, the handling of fish that are released can affect their survival. Stress, injury, and exposure to air can all increase the post-release mortality of bycatch.

Estimating fiskeridødelighed often involves complex scientific models that consider catch data, surveys of fish populations, and biological characteristics of the species. These estimates help fisheries managers determine appropriate fishing quotas and regulations to prevent overfishing and ensure the long-term viability of marine ecosystems. Declining fiskeridødelighed is a key goal for achieving sustainable fishing practices.