Electropositive shark repellent Atlantic longlining vessels in 2008. As expected, teleosts (bony fish) are not repelled by the electropositive metal’s cation liberation in seawater. This is because teleosts lack the ampullae of Lorenzini. Teleost response was confirmed using captive Cobia ("Rachycentron canadum") and Pacific halibut ("Hippoglossus stenolepis"). In July 2008 swordfish ("Xiphias gladius") catch was reported on experimental hooks treated with electropositive metal. As with all shark repellents, 100% effectiveness will not be achieved with electropositive metals. The metals are particularly effective when the shark is relying on its electrosense. It is likely that electropositive metals are ineffective for deliberately stimulated (chummed) sharks,
Flat Islands (Antarctica) Antarctic Names Committee of Australia (ANCA) recommended in 1958 that the descriptive name Flat Islands be applied for the entire group. The group is made up of Stinear Island and Béchervaise Island, amongst others. Flat Islands (Antarctica) The Flat Islands or Flatøyholmane are a small chain of islands which extends in a northeast-southwest direction, lying about north-west of Mawson Station and southwest of Welch Island in the eastern part of Holme Bay. The Flat Islands were mapped by Norwegian cartographers from air photos taken by the Lars Christensen Expedition (1936-1937) and the name Flatøyholmane (the flat island islets) was applied