Krill are small animals, considered a type of zooplankton, and hence need to be fished with fine-meshed plankton nets. Such nets pose several problems: they tend to clog fast, and they have high drag, producing a bow wave that deflects the krill …

Jun 6, 2019 · Bongo nets can be deployed into deeper depths to sample the organisms during the day that live in the darker, deeper water column that would normally migrate to the surface at night to feed. Often in the sampling you will find krill, fish larvae, crab larvae, and a …

Sep 6, 2024 · Using bubble nets helps humpbacks consolidate krill, reducing the amount of energy they need to catch them. In all, they documented more than 80 bubble nets in high detail in the waters of...

Krill are fished commercially in the Southern Ocean and in the waters around Japan. The total global harvest amounts to 150,000–200,000 tonnes annually, mostly from the Scotia Sea. Most krill catch is used for aquaculture and aquarium feeds, as bait in sport fishing, or in the pharmaceutical industry.

Nov 6, 2024 · Krill fishing vessels tow their nets at very low speeds (1-2 knots), posing no collision risk to whales. At sea observations show that fin whales, the most abundant species at the fishing grounds, are aware of vessels and maneuver ahead of them, avoiding interaction.

Jan 8, 2024 · Krill is a main food source for many fish species, including cod, basking sharks, pollock, mackerel and mackerel. The larval and juvenile stages of krill are eaten by smaller fish, while the adult stage is consumed by larger predators.

Apr 28, 2015 · A few years ago there were reports of fur seals being trapped in krill fishing nets and as a result of this the nets used in the krill fishery have to be fitted with an ‘exclusion device’ to avoid seals becoming trapped in the net.

Sep 8, 2024 · The 50-foot whales blow circles of bubbles underwater, creating a net of air that entraps the krill. A new study shows that humpbacks can do this with remarkable precision to corral their prey, even tailoring the bubble nets for the type of food they’re eating.

Aug 26, 2024 · Around the world, humpback whales (Megaptera novaeangliae) use bubble-nets to trap certain prey such as krill, herring, and young salmon, sometimes in coordinated groups …

The Antarctic krill trawl fishing net is characterized in that the wing and the net body are single-deck nettings of a four-piece type symmetrical structure, the mesh of the wing is 0.24 meter,...