Abstract
The growth and spawning of Lacuna pallidula and L. vincta were measured in the laboratory over 7 months. In both cases, there were significant differences between the mean number of eggs per batch or weight of egg batches from females of the same species and also between rates of spawning by females of the same species. The reproductive effort of L. vincta, estimated by the ratio total spawn weight: body weight and by the time taken to exceed body weight in cumulative spawn, is approximately twice that of L. pallidula. L. vincta has a long-lived planktotrophic larva, while L. pallidula has direct, lecithotrophic development, and therefore in this instance planktotrophic development seems to be more expensive to the parent than lecithotrophic development. Published work on two Pacific seastars leads to the opposite conclusion, and it is suggested that the paradox can be resolved in terms of r-K-selection theory. In both cases, the r-selected species has a higher reproductive effort, notwithstanding that the snail is planktotrophic and the seastar lecithotrophic in development.
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Literature Cited
Calow, P.: Length-dry weight relationships in snails: some explanatory models. Proc. malac. Soc. Lond. 41, 357–375 (1975)
Fralick, R.A., K.W. Turgeon and A.C. Mathieson: Destruction of kelp populations by Lacuna vincta (Montagu). Nautilus 88, 112–114 (1974)
Gadgil, M. and O.T. Solbrig: The concept of “r” and “K” selection: evidence from wild flowers and some theoretical considerations. Am. Nat. 106, 14–31 (1972)
Gaines, M.S., K.J. Vogt, J.L. Hamrick and J. Caldwell: Reproductive strategies and growth patterns in sunflowers (Helianthus). Am. Nat. 108, 889–894 (1974)
Grahame, J.: Breeding energetics of Littorina littorea (L.) (Gastropoda: Prosobranchiata). J. Anim. Ecol. 42, 391–403 (1973)
Menge, B.: Effect of wave action and competition on brooding and reproductive effort in the seastar, Leptasterias hexactis. Ecology 55, 84–93 (1974)
Mileikovsky, S.A.: Seasonal and daily dynamics in pelagic larvae of marine shelf bottom invertebrates in nearshore waters of Kandalaksha Bay (White Sea). Mar. Biol. 5, 180–194 (1970)
Pianka, E.R.: On “r” and “K” selection. Am. Nat. 104, 592–597 (1970)
Smith, D.A.S.: The population biology of Lacuna pallidula (da Costa) and Lacuna vincta (Montagu) in north-east England. J. mar. biol. Ass. U.K. 53, 493–520 (1973)
Stearns, S.C.: Life-history tactics: a review of the ideas. Q. Rev. Biol. 51, 3–47 (1976)
Thorson, G.: Reproduction and larval development of Danish marine bottom invertebrates, with special reference to the planktonic larvae in the sound (Øresund). Meddr Kommn Havunders. (Ser. Plankton). 4, 1–523 (1946)
Tinkle, D.W. and N.F. Hadley: Lizard reproductive effort: caloric estimates and comments on its evolution. Ecology 56, 427–434 (1975)
Vance, R.R.: On reproductive strategies in marine benthic invertebrates. Am. Nat. 107, 339–352 (1973)
Warburton, K.: Studies on the feeding, growth and behaviour of Patine pellucida (L.) and Lacuna vincta (Montagu) (Gastropoda: Prosobranchia), 204 pp. Ph.D. thesis, University of Newcastle upon Tyne 1975
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Communicated by J.H.S. Blaxter, Oban
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Grahame, J. Reproductive effort and r-and K-selection in two species of Lacuna (Gastropoda: Prosobranchia). Marine Biology 40, 217–224 (1977). https://doi.org/10.1007/BF00390877
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DOI: https://doi.org/10.1007/BF00390877