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Age, growth and maturation of the loliginid squids Alloteuthis africana and A. Subulata on the west African shelf

  • Alexander Arkhipkin (a1) and Nataly Nekludova (a1)

Extract

Samples of two loliginid squids Alloteuthis africana and A. subulata were collected from the continental shelf off the west Sahara in August-September 1987. Statoliths were taken from 124 specimens and processed using statolith ageing techniques. Statoliths of both species were very similar in shape. In the ground statolith, growth increments were examined and grouped into four growth zones distinguished mainly by the width of the increments. Age of adult mature males of both species did not exceed eight months, that of females six months. Alloteuthis africana grew faster than A. subulata in weight and, particularly, in length. At age 180 d the mantle of A. africana was twice as long and the body weight 1·2–1·5 times as large. Both species matured over a wide range of sizes and ages (from 120 to 180 d). The life span of A. africana and A. subulata hatching between January and May on the west Saharan shelf is about six months, much shorter than that of A. subulata in its northern temperate range.

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Arkhipkin, A.I., 1989. Taxonomic description plan, collection and processing technique used for statoliths of squids and cuttlefish. Zoologicheskii Zhurnal, 68 (3), 115120. [In Russian with English summary.]
Arkhipkin, A.I. & Murzov, S.A., 1986. Statolith morphology, growth and development in squids of the family Ommastrephidae from the south-eastern part of the Pacific Ocean. Zoologicheskii Zhurnal, 65, 499505. [In Russian with English summary.]
Balch, N., Sirois, A. & Hurley, G.V., 1988. Growth increments in statoliths from paralarvae of the ommastrephid squid Illex (Cephalopoda: Teuthoidea). Malacologia, 29, 103112.
Clarke, M.R., 1978. The cephalopod statolith- an introduction to its form. Journal of the Marine Biological Association of the United Kingdom, 58, 701712.
Dawe, E.G. & Natsukari, Y., 1991. Light microscopy. In Squid age determination using statoliths (ed. P., Jerebet al.), pp. 8396. Mazara del Vallo, NTR-ITPP. Special publications, no.l.
Forsythe, J.W. & Van Heukelem, W.F., 1987. Growth. In Cephalopod life cycles, vol. II (ed. P.R., Boyle), pp. 135156. London: Academic Press.
Jackson, G.D., 1990. Age and growth of the tropical nearshore loliginid squid Sepioteuthis lessoniana determined from statolith growth-ring analysis. Fishery Bulletin. National Oceanic and Atmospheric Administration. Washington, DC, 88, 113118.
Jackson, G.D. & Choat, J.H., 1992. Growth in tropical cephalopods: an analysis based on statolith microstructure. Canadian journal of Fisheries and Aquatic Sciences, 49, 218228.
Kristensen, T.K., 1980. Periodical growth rings in cephalopod statoliths. Dana, 1, 3951.
Lipinski, M.R., 1985. Laboratory survival of Alloteuthis subulata (Cephalopoda: Loliginidae) from the Plymouth area. Journal of the Marine Biological Association of the United Kingdom, 65, 845855.
Lipinski, M.R., 1986. Methods for the validation of squid age from statoliths. Journal of the Marine Biological Association of the United Kingdom, 66, 505526.
Mangold-Wirz, K., 1963. Biologie des Cephalopodes benthiques et nectoniques de la Mer Catalane. Vie et Milieu, supplement no. 13, pp. 1285.
Morris, C.C., 1988. Statolith growth lines and statocyst function in the Cephalopoda. PhD thesis, University of Cambridge.
Morris, C.C., 1991. Methods for in situ experiments on statolith increment formation, with results for embryos of Alloteuthis subulata. In Squid age determination using statoliths (ed. P., Jerebet al.), pp. 6772. Mazara del Vallo, NTR-ITPP. Special publications, no. 1.
Morris, C.C. & Aldrich, F.A., 1984. Statolith development in the ommastrephid squid Illex illecebrosus (Lesueur, 1821) (Cephalopoda: Ommastrephidae). American Malacological Bulletin, 2, 5156.
Natsukari, Y., Nakanose, T. & Oda, K., 1988. Age and growth of the loliginid squid Photololigo edulis (Hoyle, 1885). Journal of Experimental Marine Biology and Ecology, 116, 177190.
Nesis, K.N., 1987. Cephalopods of the world. Neptune City: TEH Publications.
Nigmatullin, Ch.M., 1989. Las especies de calamar mas abundantes del Atlantico Sudoeste y synopsis sobre la ecologia del calamar (Illex argentinus). Frente Maritimo, 5A, 7181.
Rodhouse, P.G., Swinfen, R.C. & Murray, A.W.A., 1988. Life cycle, demography and reproductive investment in the myopsid squid Alloteuthis subulata. Marine Ecology Progress Series, 45, 245253.
Roper, C.F.E., Sweeney, M.J. & Nauen, C.E., 1984. FAO species catalogue. Vol. 3. Cephalopods of the world. An annotated and illustrated catalogue of species of interest to fisheries. Fisheries Synopsis. FAO, no. 125, 277 pp.

Age, growth and maturation of the loliginid squids Alloteuthis africana and A. Subulata on the west African shelf

  • Alexander Arkhipkin (a1) and Nataly Nekludova (a1)

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