Longlines refer to a fishing technique that involves the use of a series of floating lines, often several miles long, with baited hooks attached at regular intervals. Primarily utilized in commercial fishing, longlines are deployed horizontally across the water column, either near the surface or at specific depths depending on the target species.
The primary purpose of longlines is to exploit pelagic (open water) species such as tuna, swordfish, and various types of large fish. This fishing method takes advantage of the natural feeding habits of these species, luring them with baited hooks that are cast out in strategic locations. The lines are typically marked with buoys or flags for easier identification and retrieval.
Longlines offer the advantage of covering vast areas, maximizing the chances of catching fish. However, due to their length, they pose significant risks to non-target marine wildlife, such as seabirds, sea turtles, and sharks, which can become unintentionally caught on the hooks.
In recent years, concerns about the impact on marine ecosystems and non-target species have led to increased regulations and the implementation of measures to mitigate bycatch. These measures can include the use of circle hooks to minimize injuries to non-target species, specialized weights to maintain the lines at specific depths, and the use of acoustic deterrent devices to repel marine mammals.
Overall, longlines are a widely practiced fishing method that exploits open water species and allows for the effective capture of large quantities of fish. However, their use also merits careful management to ensure sustainable fishing practices and minimize negative impacts on marine biodiversity.
