Journal of EXPERIMENTAL MARINE BIOLOGY Journal of Experimental Marine Biology and Ecology AND ECOLOGY 253 (2000) 263-264 www.elsevier.nl/locate/jembe Contents of Volume 253 Research articles Y. Perez, J.-P. Casanova, J. Mazza (France) Changes in the structure and ultrastructure of the intestine of Spadella cephaloptera (Chaetognatha) during feeding and starvation experiments J.A. Pechenik, S. Lewis (USA) Avoidance of drilled gastropod shells by the hermit crab Pagurus longicarpus at Nahant, Massachusetts A. Corona, L.A. Soto, A.J. Sanchez (México) Epibenthic amphipod abundance and predation efficiency of the pink shrimp Farfan- tepenaeus duorarum (Burkenroad, 1939) in habitats with different physical complexity in a tropical estuarine system P. Debenham, M. Brzezinski, K. Foltz, S. Gaines (USA) Genetic structure of populations of the red sea urchin, Strongylocentrotus franciscanus M.I. Roldan, R.G. Perrotta, M. Cortey, C. Pla (Spain, Argentina) Molecular and morphologic approaches to discrimination of variability patterns in chub mackerel, Scomber japonicus A.J. Hobday (USA) Persistence and transport of fauna on drifting kelp (Macrocystis pyrifera (L.) C. Agardh) rafts in the Southern California Bight A.J. Hobday (USA) Age of drifting Macrocystis pyrifera (L.) C. Agardh rafts in the Southern California Bight . Grudemo, T. Bohlin (Sweden) Effects of sediment type and intra- and interspecific competition on growth rate of the marine snails Hydrobia ulvae and Hydrobia ventrosa Contents of Volume 253 / J. Exp. Mar. Biol. Ecol. 253 (2000) 263-264 Research articles S.A. Navarrete, E.A. Wieters (Chile) Variation in barnacle recruitment over small scales: larval predation by adults and maintenance of community pattern ’. Takegaki, A. Nakazono (Japan) The role of mounds in promoting water-exchange in the egg-tending burrows of monogamous goby, Valenciennea longipinnis (Lay et Bennett) . Rochette, L.M. Dill (Canada) Mortality, behavior and the effects of predators on the intertidal distribution of littorinid gastropods D.-H. Jiang, A.L. Lawrence, W.H. Neill, H. Gong (USA) Effects of temperature and salinity on nitrogenous excretion by Litopenaeus vannamei juveniles M.G:S. Brillant, B.A. MacDonald (Canada) Postingestive selection in the sea scallop, Placopecten magellanicus (Gmelin): the role of particle size and density N.A. Moltschaniwskyj, G.D. Jackson (Australia) Growth and tissue composition as a function of feeding history in juvenile cephalopods G. Ejdung, L. Byrén, R. Elmgren (Sweden) Benthic predator—prey interactions: evidence that adult Monoporeia affinis (Am- phipoda) eat postlarval Macoma balthica (Bivalvia) T. Yoshinaga, A. Hagiwara, K. Tsukamoto (Japan) Effect of periodical starvation on the life history of Brachionus plicatilis O.F. Miiller (Rotifera): a possible strategy for population stability Author Index of Volume 253 Contents of Volume 253