Abstract
Growth rate and hatch date distributions were estimated for juvenile walleye pollock Theragra chalcogramma (Pallas, 1814) collected in autumn 1987 from the western Gulf of Alaska. Mean juvenile growth rates varied geographically by as much as 45%. A trend for slower growth around Unimak Pass and the Shumagin Islands and faster growth upstream in the Alaska Coastal Current towards Kodiak Island was noted; the fastest growth did not occur in the main habitat region. Juvenile hatch date distributions were compared to identify regional differences that might reflect stock structure. Juvenile hatch dates were compared with hatch dates of the same cohort sampled as larvae to test for selective mortality. Regional differences in hatch dates, along with other information, indicated several minor spawning populations located around Kodiak Island and near Unimak Pass. For the main aggregation of pollock in the Shumagin Island region, hatch date distributions were not significantly different among the early larval cohort sampled in late May, the late larvae sampled in mid-June to early July, and the juveniles sampled in autumn. Neither growth-rate nor size-dependent mortality of pollock between the larval and juvenile stages appears to be a dominant factor in determining survival patterns. An alternative test was attempted, by which lengths-at-age during larval life were back-calculated from juvenile otoliths and compared with lengths-at-age of the population sampled as larvae in May and June. Pollock surviving as juveniles in autumn were not larger as larvae than the general larval population. This result is an example of the observation that back-calculated lengths are almost always smaller than the lengths of fish sampled at age (Lee's phenomenon). Problems in determining survival patterns based on otolith back-calculations and comparison of hatch date distributions are discussed.
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Literature cited
Bailey, K. M., Stchr, L. (1988). The effects of feeding periodicity and ration on the rate of increment formation in otoliths of larval walleye pollock Theragra chalcogramma (Pallas). J. exp. mar. Biol. Ecol. 122: 147–161
Campana, S.E. (1989). Otolith microstructure of three larval gadids in the Gulf of Maine, with inferences on early life history. Can. J. Zool. 67: 1401–1410
Campana, S.E. (1990). How reliable are growth back-calculations based on otoliths? Can. J. Fish. aquat. Sciences 47: 2219–2227
Campana, S. E., Neilson, J.D. (1985). Microstructure of fish otoliths. Can. J. Fish. aquat. Sciences 42: 1014–1032
Cooney, R.T. (1986). The seasonal occurrence of Neocalanus cristatus, Neocalanus plumchrus, and Eucalanus bungii over the shelf of the northern Gulf of Alaska. Contin. Shelf Res. 5: 541–553
Haldorson, L., Paul, A.J., Sterritt, D., Watts, J. (1989). Annual and seasonal variation in growth of larval walleye pollock and flat-head sole in a southeastern Alaskan bay. Rapp. P.-v. Réun. Cons. perm. int. Explor. Mer 191:220–225
Hinckley, S., Bailey, K., Schumacher, J., Picquelle, S., Stabeno, P. (1989). Preliminary results of a survey for late-stage larval walleye pollock and observations of larval drift in the western Gulf of Alaska, 1987. In: Proc. int. Symp. Biol. Mgmt. Walleye Pollock Nov. 1988, Anchorage, Alaska, Sea Grant Rep. AK-SG-89-01. Univ. of Alaska, Fairbanks
Hinckley, S., Bailey, K., Schumacher, J., Picquelle, S., Stabeno, P. (1991). Observations of larval drift and results of a survey for late-stage larval walleye pollock (Theragra chalcogramma) in the western Gulf of Alaska. Can. J. Fish. aquat. Sciences 48: 91–98
Houde, E.D. (1978). Fish early life history dynamics and recruitment variability. Am. Fish. Soc. Symp. 2: 17–29
Houde, E.D. (1989). Subleties and episodes in the early life of fishes. J. Fish Biol. 35(Suppl. A): 29–38
Kendall, A. W., Jr., Picquelle, S.J. (1990). Egg and larval distributions of walleye pollock Theragra chalcogramma in Shelikof Strait, Gulf of Alaska. Fish. Bull. U.S. 8(1): 133–154
Kim, S., Kendall, A.W. (1989). Distribution and transport of larval walleye pollock (Theragra chalcogramma) in Shelikof Strait, Gulf of Alaska, in relation to water movement. Rapp. P.-v. Réun. Cons. Perm. int. Explor. Mer 191: 127–136
Methot, R.D., Jr. (1983). Seasonal variations in survival of larval northern anchovy, Engraulis mordax estimated from the age distribution of juveniles. Fish. Bull. U.S. 81(4): 741–750
Nishimura, A., Yamada, J. (1984). Age and growth of larval and juvenile walleye pollock, Theragra chalcogramma (Pallas), as determined by otolith daily growth increments. J. exp. mar. Biol. Ecol. 82: 191–205
Nishimura, A., Yamada, J. (1988). Geographical differences in early growth of walleye pollock Theragra chalcogramma, estimated by back-calculation of otolith daily growth increments. Mar. Biol. 97: 459–465
Nishiyama, T., Hirano, K., Haryu, T. (1986). The early life history and feeding habits of larval walleye pollock, Theragra chalcogramma (Pallas), in the southeast Bering Sea. Bull. int. N. Pacif. Fish. Commn. 45: 177–227
Radtke, R. L. (1989). Larval fish age, growth, and body shrinkage: information available from otoliths. Can J. Fish. aquat. Sciences 46: 1884–1894
Reed, R.K., Stabeno, P.J. (1989). Recent observations of variability in the path and vertical structure of the Alaska Stream. J. Phys. Oceanogr. 19: 1634–1642
Reznick, D., Lindbeck, E., Bryga, H. (1989). Slower growth results in larger otoliths: an experimental test with guppies (Poecilia reticulata). Can. J. Fish. aquat. Sciences 46: 108–112
Rice, J.A., Crowder, L.B., Holey, M.E. (1987). Exploration of mechanisms regulating larval survival in Lake Michigan bloater: a recruitment analysis based on characteristics of individual larvae. Trans. Am. Fish. Soc. 116: 703–718
Ricker, W.E. (1969). Effects of size-selective mortality and sampling bias on estimates of growth, mortality, production, and yield. J. Fish. Res. Bd Can. 26: 479–541
Rohlf, F.J. (1987). Biom: a package of statistical programs to accompany the text Biometry. Applied Biostatistics, Inc., Setauket, N.Y.
Schnute, J. (1981). A versatile growth model with statistically stable parameters. Can. J. Fish. aquat. Sciences 38: 1128–1140
Secor, D.H., Dean, J.M. (1989). Somatic growth effects on the otolith-fish size relationship in young pond-reared striped bass, Morone saxitilis. Can J. Fish. aquat. Sciences 46: 113–121
Sokal, R.R., Rohlf, R.J. (1981). Biometry W.H. Freeman and Company, New York
Walline, P.D. (1983). Growth of larval and juvenile walleye pollock related to year-class strength. Ph. D. dissertation, Univ. of Washington, Seattle
Walline, P.D. (1985). Growth of larval walleye pollock related to domains within the SE Bering Sea. Mar. Ecol. Prog. Ser. 21: 197–203
Wilkinson, L. (1988). SYSTAT: the system for statistics. Evanston, SYSTAT, Inc. Illinois
Yoklavich, M.M., Bailey, K.M. (1990). Hatching period, growth and survival of young walleye pollock Theragra chalcogramma as determined from otolith analysis. Mar. Ecol. Prog. Ser. 64: 13–23
Zar, J.H. (1984). Biostatistical Analysis. Prentice-Hall, Inc., Englewood Cliffs, New Jersey
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Communicated by J. Grassle, New Brunswick
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Brown, A.L., Bailey, K.M. Otolith analysis of juvenile walleye pollock Theragra chalcogramma from the western Gulf of Alaska. Marine Biology 112, 23–30 (1992). https://doi.org/10.1007/BF00349723
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DOI: https://doi.org/10.1007/BF00349723