Aspects of embryonic development in two southwest Atlantic gadiform fish: tadpole codling, Salilota australis (Moridae), and southern blue whiting, Micromesistius australis (Gadidae)
2009
Laptikhovsky, V. | Brickle, P.,Falkland Islands Government Fisheries Dept., Stanley (Falkland Islands)
Tadpole codling, Salilota australis (Gunther, 1878), and southern blue whiting, Micromesistius australis Norman, 1937, are two commercially important species, which spawning grounds are situated in the Falkland waters. Eggs from each species were taken from running females captured on their spawning grounds and then fertilized. Egg samples were collected every 6 hours and stage of embryonic development was assigned using a dissecting microscope. Tadpole codling eggs are of 1.20-1.55 mm, with an oil globule of 0.29-0.33 mm, incubation takes 40-45 degree-days. Larval size at hatching is ca 2.9 mm TL. Blue whiting eggs are of 1.40-1.55 mm with no oil globule, development takes 45-50 degree-days. Larval size at hatching is 2.8-3.0 mm. Duration of embryonic development for commercial southwest Atlantic gadiform fish, tadpole codling, Salilota australis, and southern blue whiting, Micromesistius australis, is documented for the first time
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