Aspects of embryonic development in two southwest Atlantic gadi-form fish: tadpole codling, Salilota australis [Moridae], and southern blue whiting, Micromesistius australis [Gadidae]

• Autorzy: Laptikhovsky V , Brickle P.
• Języki publikacji: EN

Abstrakty

EN

Background. Tadpole codling, Salilota australis (Günther, 1878), (known also as red cod) and southern blue whiting, Micromesistius australis Norman, 1937, are two commercially important species, which spawning grounds are situated in the Falkland waters. Nothing is known about duration of the embryonic development in these fish, whereas these data are necessary to study life cycle strategies as well as for stock management. Because of this, experiments with artificial egg fertilisation were carried out onboard a research boat that was the only way to obtain such an information. Materials and Methods. Eggs from each species were taken from running females captured on their spawning grounds and then fertilised. Egg samples were collected every 6 hours and stage of embryonic development was assigned using a dissecting microscope. Results. Tadpole codling eggs are of 1.20–1.55 mm, with an oil globule of 0.29–0.33 mm, incubation takes between 140–150 h at 6–8.5ºC, 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 from 150 h at a mean temperature of 7.15ºC to 200 h at between 5.5 and 6ºC, 45–50 degree-days. Larval size at hatching is 2.8–3.0 mm. Conclusion. 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. It allows to draw some conclusions about possible mortality during this ontogenetic stage (assuming that daily rates are similar to those in other similar species) and to hypothesise about possible egg transport by currents and interannual spawning grounds’ variability.

Słowa kluczowe

PL

gadiform fish; Atlantic gadiform fish; fish; embryonic development; blue whiting; Micromesistius australis; Gadidae; tadpole codling; Salilota australis; Moridae; egg; embryogenesis; development

• Wydawca: -
• Czasopismo: Acta Ichthyologica et Piscatoria
• Rocznik: 2009
• Tom: 39
• Numer: 2
• Opis fizyczny: p.127-130,fig.,ref.

Twórcy

autor

Laptikhovsky V

• Falkland Islands Government Fisheries Department, P.O.Box 598, Stanley, Falkland Islands

autor

Brickle P.

Bibliografia

• Balbontin F., Uribe F., Bernal R., Braun M. 2004. Descriptions of larvae of Merluccius australis, Macruronus magellanicus, and observations on a larva of Micromesistius australis from southern Chile (Pisces: Gadiformes). New Zealand Journal of Marine and Freshwater Research 38: 609–619.
• Bertolini F., D’Ancona U., Padoa Montalenti E., Ranzi S., Sanzo L., Sparta A., Tortonese E., Vialli M. 1956. Uova, larve e stadi giovanili di Teleostei. Fauna e Flora del Golfo di Napoli Monografia 38: 1–1064.
• Bustos C.A., Landaeta M.F. 2005. Desarrollo de huevos y larvas tempranas de la merluza del sur, Merluccius australis, cultivados bajo condiciones de laboratorio. Gayana 69: 402–408.
• Ciechomski J.D., Booman C.I. 1981. Descripcion de embriones y de areas de reproduccion de los granaderos Macrourus whitsoni y Coelorhynchus fasciatus, de la polaca Micromesistius australis y del bacalao austral Salilota australis en zona Patagonica y Fuegina del Atlantico Sudoccidental. Physis 40 (98): 5–14.
• Coombs S.H., Hiby A.R. 1979. The development of the eggs and early larvae of blue whiting, Micromesistius poutassou and the effect of temperature on development Journal of Fish Biology 14: 111–123. DOI: 10.1111/j.1095-8649.1979.tb03500.x.
• Fahay M.P. 2007. Early stages of fishes in the western North Atlantic Ocean (Davis Strait, Southern Greenland and Flemish Cap to Cape Hatteras). Vol. 1: Acipenseriformes through Syngnathiformes. NAFO Publications. http://www.nafo.int/publications/frames/science.html
• Froese R., Pauly D. (eds.) 2009. FishBase. [version 10/2007] http://www.fishbase.org.
• Kitagawa D., Kuroda K., Tsuruta Y. 1985. Description and distribution of eggs and larvae of the brown hakeling, Physiculus maximowiczi in Japanese waters. Bulletin of Japanese Society of Scientific Fisheries 51: 1627–1630.
• Macchi G.J., Pájaro M., Wöhler O.C., Acevedo M.J., Centurión M.L., Urteaga D.G. 2005. Batch fecundity and spawning frequency of southern blue whiting (Micromesistius australis) in the southwest Atlantic Ocean. New Zealand Journal of Marine and Freshwater Research 39: 993–1000.
• Merrett N.R., Haedrich R.L. 1997. Deep-sea demersal fish and fisheries. Chapman and Hall, London.
• Okiyama M. 1988. An atlas of early stage fishes in Japan. Tokai Univ. Press. Tokyo. [In Japanese.]
• Pájaro M., Macchi G.J. 2001. Spawning pattern, length at maturity, and fecundity of the southern blue whiting (Micromesistius australis) in the south-west Atlantic Ocean. New Zealand Journal of Marine and Freshwater Research 35: 375–385.
• Patchell G.J., Allen M.S., Dreadon D.J. 1987. Egg and larval development of the New Zealand hoki Macruronus novaezelandiae. New Zealand Journal of Marine and Freshwater research 21: 301–313.
• Seaton D.D., Bailey R.S. 1971. The identification and development of the eggs and larvae of the blue whiting Micromesistius poutassou (Risso). Journal du Conseil 34: 76–83. DOI: 10.1093/icesjms/34.1.76.
• Thompson B.M., Riley J.D. 1981. Egg and larval development studies in the North Sea cod (Gadus morhua L.). Rapport et Proces-verbaux des Reunions. Conseil International pour l’Exploration de la Mer 178: 553–559.
• Weiss G. 1974. Hallazgo y descripcion de larvas de la polaca Micromesistius australis en aguas del sector Patagonico Argentino (Pisces, Gadidae). Physis 33 (87): 537–542.
• Weiss G. 1975. Hallazgo, descripcion y distribucion de las postlarvas del bacalao criollo, Salilota australis, y pez sable, Lepidopus caudatus, en agues de la plataforma Argentina (Pisces). Physis 34 (89): 319–325.
• Wöhler O.C., Cassia M.C., Hansen J.E. 2001. Evaluación pesquera del bacalao austral (Salilota australis) del Atlántico Sudoccidental. Revista de Investigación y Desarrollo Pesquero 14: 23–36.