Sivusaaliiden

Sivusaaliiden refers to unintended catches in fishing, often termed bycatch. This phenomenon occurs when fishing gear, designed to target specific species, also captures non-target fish, marine mammals, seabirds, or other aquatic life. The extent and nature of bycatch vary significantly depending on the type of fishing gear used, the fishing grounds, and the targeted species.

Different fishing methods have varying rates of bycatch. For instance, certain types of nets, like driftnets, have historically been associated with high bycatch of marine mammals and seabirds. Trawling, another common method, can also inadvertently catch a wide array of species. Hook-and-line fisheries, while often considered more selective, can still result in bycatch, particularly of seabirds and turtles.

The ecological impact of sivusaaliiden is a significant concern for fisheries management and marine conservation. High levels of bycatch can deplete populations of non-target species, some of which may be endangered or threatened. This can disrupt marine ecosystems and affect biodiversity. Efforts to mitigate bycatch include the development and implementation of more selective fishing gear, such as modifications to nets and the use of acoustic deterrents. Regulatory measures, like time and area closures, and quotas for bycatch species, are also employed. International cooperation and research are crucial for understanding and addressing the complexities of sivusaaliiden globally.