Contents of Volume 13, Number 2

In memoriam-Ravena Ukeles, pp.355-356

In memoriam-Jurgen E. Winter, pp. 357-359

Peter J. Auster and Robert E. DeGoursey
Winter predation on blue crabs, Callinectes sapidus, by starfish Asterias forbesi, pp. 361-366

Daniel P. Molloy, Jon Powell and Peter Ambrose
Short-term reduction of adult zebra mussels, Dreissena polymorpha, in the Hudson River near Catskill, New York: An effect of juvenile blue crab Callinectes sapidus predation?, pp. 367-371

S. W. Fisher, H. Dabrowska, D. L. Waller, L. Babcock-Jackson and X. Zhang
Sensitivity of zebra mussel (Dreissena polymorpha) life stages to candidate molluscicides, pp. 373-377

Helga Guderley, Alain Demers and Patrice Couture
Acclimatization of blue mussel (Mytilus edulis, Linnaeus, 1758) to intertidal conditions: effects on mortality and gaping during air-exposure, pp. 379-385

Renee Mercaldo-Allen, Catherine A. Kuropat, James Widman and Frederick P. Thurberg
Molt-related changes in hemolymph calcium of postlarval American lobsters (Homarus americanus), pp. 387-391

C. R. Evans and A. P. M. Lockwood
Population field studies of the Guinea chick lobster (Panulirus guttatus Latreille) at Bermuda: Abundance, catchability and behaviour, pp. 393-415

Federico Garcia-Dominguez, Silvia Alejandra Garcia-Gasca and Jose Luis Castro-Ortiz
Spawning cycle of the red clam Megapitaria aurantiaca (Sowerby, 1831) (Veneridae) at Isla Espiritu Santo, Baja California Sur, Mexico, pp. 417-423

Joseph G. Loesch and David A. Evans
Quantifying seasonal variation in somatic tissue: Atlantic surfclam, Spisula solidissima (Dillwyn, 1819) - A case study, pp. 425-431

Randal L. Walker and Peter B. Heffernan
Age, growth rate, and size of -the southern surficlam, Spisula solidissima similis (Say, 1822), pp. 433-441

J. M. E. Stenton-Dozey and A. C. 'Brown
Exposure of the sandy-beach bivalve Donax serra Roding to a heated and chlorinated effluent I. Effects of temperature on burrowing and survival, pp. 443-449

J. M. E. Stenton-Dozey and A. C. Brown
Exposure of the sandy-beach bivalve Donax serra Roding to a heated and chlorinated effluent II. Effects of chlorine on burrowing and survival, pp. 451-454

J. M. E. Stenton-Dozey and A. C. Brown
Exposure of the sandy-beach bivalve Donax serra Roding to a heated and chlorinated effluent III. Effects of temperature and chlorine on heart rate, pp. 455-459

S. J. Kleinschuster, F. O. Perkins, M. J. Dykstra and S. L. Swink
The in vitro life cycle of a Perkinsus sp. (Apicomplexa, Perkinsidae) isolated from Macoma balthica (Linnaeus, 1758), pp. 461-465

Qiushi Xie and Gavin M. Burnell
A comparative study of the gametogenic cycles of the clams Tapes philippinarum (A. Adams & Reeve, 1850) and Tapes decussatus (Linnaeus) on the south coast of Ireland, pp. 467-472

Michael J. Kennish, Richard A. Lutz, Joseph A. Dobarro and Lowell W. Fritz
In situ growth rates of the ocean quahog, Arctica islandica (Linnaeus, 1767) in the Middle Atlantic Bight, pp. 473-478

Randal L. Walker and Peter B. Heffernan
Temporal and spatial effects of tidal exposure on the gametogenic cycle of the northern quahog, Mercenaria mercenaria (Linnaeus, 1758), in coastal Georgia, pp. 479-486

Katharine Lee Mettner-Roop
The effect of aquaculture on the genetics of natural populations of the hard clam, Mercenaria mercenaria (L), pp. 487-491

J. Erasmus, P. A. Cook and N. Sweijd
Internal shell structure and growth lines in the shell of the abalone, Haliotis midae, pp. 493-501

M. J. Kaufmann, M. N. L. Seaman, C. Andrade and F. Buchholz
Survival, growth, and glycogen content of Pacific oysters, Crassostrea gigas (Thunberg, 1793), at Madeira Island (subtropical Atlantic), pp. 503-505

Martin L. H. Thomas and Joyce C. Dangeubun
The breeding and secondary production of the flat tree-oyster Isognomon alatus (Ginelin, 1791) in Trotts Pond Bermuda, pp. 507-511

Janzel R. Villalaz G.
Laboratory study of food concentration and temperature effect on the reproductive cycle of Argopecten ventricosus, pp. 513-519

Aswani K. Volely and Fu-Lin E. Chu
Comparison of infectivity and pathogenicity of meront (trophozoite) and prezoosporangiae stages of the oyster pathogen Perkinsus marinus in eastern oysters, Crassostrea virginica (Gmelin, 1791), pp. 521-527

M. K. Krause, W. S. Arnold and W. G. Ambrose, Jr.
Morphological and genetic variation among three populations of calico scallops, Argopecten gibbus, pp. 529-537

Y. Lefort
Growth and mortality of the tropical scallops: Annachlamys flabellata (Bernardi), Comptopallium radula (Linne) and Mimachlamys gloriosa (Reeve) in South-West Lagoon of New Caledonia, pp. 539-546

Mohsin U. Patwary, Ellen L. Kenchington, Carolyn J. Bird and Eleutherios Zouros
The use of random amplified polymorphic DNA (RAPD) markers in genetic studies of the sea scallop Placopecten magellanicus (Gmelin, 1791), pp. 547-553

Edward H. Allison
Seasonal growth models for great scallops (Pecten maximus (L.)) and queen scallops (Aequipecten opercularis (L.)), pp. 555-564

G. Cliche, M. Giguere and S. Vigneau
Dispersal and mortality of sea scallops, Placopecten magellanicus (Gmelin, 1791), seeded on the sea bottom off Iles-de-la-Madeleine, pp. 565-570

James E. Kirkley and William D. DuPaul
Technical efficiency, biological considerations, and management and regulation of the sea scallop, Placopecten magellanicus (Gmelin, 1791) fishery, pp. 571-579

Michael Castagna and John N. Kraeuter
Age, growth rate, sexual dimorphism and fecundity of knobbed whelk Busycon carica (Gmelin, 1791) in a western Mid-Atlantic lagoon system, Virginia USA, pp. 581-585

John C. Wekell, Erich J. Gauglitz, Jr., Harold J. Barnett, Christine L. Hatfield and Mel Eklund
The occurrence of domoic acid in razor clams (Siliqua patula), dungeness crab (Cancer magister), and anchovies (Engraulis mordax), pp. 587-593

Erratum, p. 595