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Preface

ERKKI LEPPÄKOSKI THE FIRST TWENTY YEARS OF INVASION BIOLOGY IN THE BALTIC SEA AREA

DAN MINCHIN, FRANCES LUCY, MONICA SULLIVAN IRELAND: A NEW FRONTIER FOR THE ZEBRA MUSSEL DREISSENA POLYMORPHA (PALLAS)

BAZYLI CZECZUGA, EWA CZECZUGA-SEMENIUK, SOFFIA VALA TRYGGVADOTTIR CAROTENOID CONTENT IN VARIOUS BODY PARTS OF ATLANTIC SALMON (SALMO SALAR L.) AND ARCTIC CHARR (SALVELINUS ALPINUS L.) SPECIMENS FROM AN OCEAN RANCHING FARM

MICHA? GRABOWSKI, KRZYSZTOF JA?D?EWSKI, ALICJA KONOPACKA ALIEN CRUSTACEA IN POLISH WATERS (PART I) - INTRODUCTION AND DECAPODA

NADEZHDA BEREZINA, SERGEY GOLUBKOV, JULIA GUBELIT GRAZING EFFECTS OF ALIEN AMPHIPODS ON MACROALGAE IN THE LITTORAL ZONE OF THE NEVA ESTUARY (EASTERN GULF OF FINLAND, BALTIC SEA)

URSZULA JANAS DISTRIBUTION AND INDIVIDUAL CHARACTERISTIC OF THE PRAWN PALAEMON ELEGANS (CRUSTACEA, DECAPODA) FROM THE GULF OF GDA?SK AND THE DEAD VISTULA RIVER

KESTUTIS ABRACIAUSKAS THE DISTRIBUTION AND LOCAL DISPERSAL OF PONTO-CASPIAN PERACARIDA IN LITHUANIAN FRESH WATERS WITH NOTES ON PONTOGAMMARUS ROBUSTOIDES POPULATION ESTABLISHMENT, ABUNDANCE AND IMPACT

JOLANTA MOROZI?SKA-GOGOL OCCURRENCE OF THE ASIATIC NEMATODE ANGUILLICOLA CRASSUS IN EUROPEAN EEL FROM THE ?EBSKO LAGOON (CENTRAL COAST, POLAND)

LESZEK ROLBIECKI, JERZY ROKICKI ANGUILLICOLA CRASSUS - AN ALIEN NEMATODE SPECIES FROM THE SWIM BLADDERS OF EEL (ANGUILLA ANGUILLA) IN THE POLISH ZONE OF THE SOUTHERN BALTIC AND IN THE WATERS OF NORTHERN POLAND

KATHE R. JENSEN, JORGEN KNUDSEN A SUMMARY OF ALIEN MARINE BENTHIC INVERTEBRATES IN DANISH WATERS

ANDREY GUSEV, IRINA STARIKOVA DISTRIBUTION AND ABUNDANCE OF MARENZELLERIA NEGLECTA (SIKORSKI AND BICK 2004) (POLYCHAETA, SPIONIDAE) IN THE KALININGRAD ZONE OF THE BALTIC SEA IN SEPTEMBER 2001 AND 2002

KRZYSZTOF JA?D?EWSKI, ALICJA KONOPACKA, MICHA? GRABOWSKI NATIVE AND ALIEN MALACOSTRACAN CRUSTACEA ALONG THE POLISH BALTIC SEA COAST IN THE TWENTIETH CENTURY

ANNA SZANIAWSKA, MONIKA NORMANT, MONIKA MICHA?OWSKA, AGNIESZKA KAMI?SKA MORPHOMETRIC CHARACTERS OF THE FRESHWATER AMERICAN CRAYFISH, ORCONECTES LIMOSUS RAF., FROM THE VISTULA LAGOON (POLAND)

ELENA EZHOVA, OLGA SPIRIDO PATTERNS OF SPATIAL AND TEMPORAL DISTRIBUTION OF THE MARENZELLERIA CF. VIRIDIS POPULATION IN THE LAGOON AND MARINE ENVIRONMENT IN THE SOUTHEASTERN BALTIC SEA

JAN WARZOCHA, S?AWOMIRA GROMISZ, ADAM WONICZKA, MARTA KOPER DISTRIBUTION OF MARENZELLERIA CF. VIRIDIS (POLYCHAETA: SPIONIDAE) ALONG THE POLISH COAST OF THE BALTIC SEA

GRA?YNA SAPOTA, ANNA SZANIAWSKA, MONIKA NORMANT CONTAMINATION BY PERSISTENT ORGANIC POLLUTANTS OF INVASIVE SPECIES FROM THE BALTIC SEA REGION

JULIA JU. POLUNINA POPULATIONS OF TWO PREDATORY CLADOCERANS IN THE VISTULA LAGOON - THE NATIVE LEPTODORA KINDTII AND THE NON-INDIGENOUS CERCOPAGIS PENGOI