**Meet the editor**

Sajal Ray received his MSc and MPhil degrees in Zoology and Environmental Science, respectively, from Calcutta University and his PhD degree from Jadavpur University. His thesis reports immunotoxicity of pesticide in an economically important snail in India. As an awardee of Fogarty Visiting Fellowship, Dr. Ray carried out his postdoctoral research in cardiac pathology at

the National Institutes of Health, USA. His research interest is studying the immunological responses of mollusc, sponge, crab and earthworm exposed to pollutants. His team is engaged in understanding the evolutionary mechanism of immunity in phylogeny. He presented his research in various conferences including the World Congress of Malacology at Washington, DC. Sajal Ray, currently a professor of Zoology at Calcutta University, has been teaching Zoology for nearly 30 years at the postgraduate level.

Contents

**Preface VII**

**Section 1 Biology, Ecology and Physiological Chemistry 1**

Chapter 1 **Egg-Laying in the Cuttlefish Sepia officinalis 3** Céline Zatylny-Gaudin and Joël Henry

**Assessment: Reality and Doubts 33**

**Invasion of Gobies 75**

**California, Mexico 119**

Varga

Chapter 2 **Pond Snail Reproduction as Model in the Environmental Risk**

Chapter 3 **Genetic Characteristics of Southern and Northern Brook Trout**

Chapter 4 **Alien Fish Species in France with Emphasis on the Recent**

Chapter 5 **Ice Age Terrestrial and Freshwater Gastropod Refugia in the**

Fabrice Teletchea and Jean-Nicolas Beisel

**Carpathian Basin, Central Europe 93**

Chapter 6 **Biodiversity of Gastropod in the Southeastern Gulf of**

Joanne E. Printz, Joseph Williams and Eric M. Hallerman

Zsolt Pirger, Zita Zrinyi, Gábor Maász, Éva Molnár and Tibor Kiss

**(Salvelinus fontinalis) Populations at the Zone of Contact 55**

Pál Sümegi, Sándor Gulyás, Dávid Molnár, Katalin Náfrádi, Tünde Törőcsik, Balázs P. Sümegi, Tamás Müller, Gábor Szilágyi and Zoltán

Ruth Escamilla-Montes, Salvador Granados-Alcantar, Genaro Diarte-Plata, Paúl de J. Pacheco-Heredia, Juan A. Gill-León, Antonio Luna-González, Jesús A. Fierro-Coronado, Píndaro Álvarez-Ruíz, Héctor M. Esparza-Leal and Wenceslao Valenzuela-Quiñonez
