This special issue contains conference proceedings on the reproductive physiology and use of reproductive technology in aquacultured and wild fishes and oysters.

The information extracted from IMPASSE, DAISIE, FishBase, and FAO-DIAS inventories of alien species were used to draw a list of the 27 most utilized animal alien species for aquaculture and related activities (e.g. stocking, sport fishing, ornamental purposes) in Europe. Three variables have been...

The solitary ascidian Styela clava Herdman, 1882 has recently been found in the Bassin de Thau, on the French Mediterranean coast, an area of intensive oyster and mussel farming. S. clava has the potential to greatly reduce oyster production in the Bassin de Thau by competing with the oysters for...

This issue contains topics on the effects of introduced/invasive alien species on aquaculture, biodiversity and aquatic ecology in North America and Europe.

These conference proceedings are a compilation of articles from various experts on sturgeon. The focus of the conference is divided into seven major themes including conservation and protection, stock assessment, human impacts, public engagement, aquaculture, caviar and processing as well as...

The red king crab Paralithodes camtschaticus (Tilesius, 1815) was introduced in the Barents Sea from the North Pacific in 1961-1969 to establish a fishery. Currently the crab inhabits an area from Kolguyev Island in the east to Sørøya in the west, and the total number of adults exceeds 40 million....

A periodic sorting of fish is important to achieve optimal growth rates and efficient fish farm operations. Conventional methods, however, are labour intensive, cause stress to the fish and increase the risk of injuries. To overcome these problems a device has been developed for automatic and...

This issue contains 26 topics on the morphology, fertilizing ability, cryopreservation, physicochemical parameters and other biological characteristics of fish spermatozoa.

Early gonad development of the Asian sea bass (Lates calcarifer) grown in a freshwater recirculation system was investigated to determine the onset of sexual maturation. Studied individuals aged between 9 and 15 months. Culture conditions were provided initially in circular tanks (4000 L) and...

Cryopreservation is of interest not only for fish farming but also for the conservation and genetic improvement of resources. This technique has been well established in some freshwater fish species mainly, salmonid, sturgeons and carps, however, only in the last decade research was focused in...