First description and survey of the egg masses of Loligo gahi (d'Orbigny, 1835) and Loligo sanpaulensis (Brakoniecki, 1984) from coastal waters of Patagonia

摘要: A survey was conducted on the egg masses of Loligo gahi (D'Orbigny, 1835), a target of an important squid fishery in the Southwest Atlantic, and L. sanpaulensis (Brakoniecki, 1984), a species exploited as a by-catch species in artisanal fisheries from Brazil to Argentina. The egg masses are described, and several spawning areas are identified. L. gahi egg masses were composed of a variable number of capsules (6-345) enclosing 40-150 eggs/embryos. L sanpaulensis egg masses consisted of numerous capsules (6-465) containing approximately 240-320 eggs/embryos. The size range of the eggs was 2.1-2.3 mm for L. gahi and 1.2-1.3 mm for L. sanpaulensis from Nuevo Gulf, showing good correspondence with size of the mature oocytes carried in the oviducts by the females of each species at the same location. L. gahi egg masses were located in San Matias, the San Jose and Nuevo gulfs, Cape Tres Puntas …