The numbers of fish farms rearing trout, carp, eels, sea fish or mussels in 13 different regions of Greece are tabulated. Total production recorded was of 147 797 t in 1991, and 153 558 t in 1992. Although natural diseases have not yet created major problems, it is suggested that the intensive...

Arthropoda parasites of fish are: Copepoda, Branchiura and Isopoda. The Branchiura are exclusively parasitic, while most of the Copepoda and Isopoda are free living. About 450 species of isopods are parasites of marine and freshwater fish. Isopods are Malacostraca. In the isopod families...

Following the rapid development of fish farming, an outbreak of pathological problems appeared, mainly of parasitic origin. These have an effect on fish growth (especially during the cage-growing stage), where they may periodically cause mortality up to 80%, which in turn has a serious economic...

Intensive fish culture practiced in the Mediterranean requires fish to live under stressful conditions and high fish densities, something that facilitates transmission and spread of bacterial pathogens within cultured fish populations. One of the most important means of transmission of bacterial...

Anaesthetic agents are routinely used in farmed fish to permit the performance of painful procedures, ease handling and reduce stress during grading, tagging, transport, blood sampling, artificial breeding and vaccination. An ideal anaesthetic for fish should induce anaesthesia rapidly, allow a...

Sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax) were sampled from three different locations in Greece (2 cage fish farms located in different geographic areas and a lagoon), in order to investigate the prevalence of Metazoa parasites, the intensity and the factors associated with the ...

In intensive fish rearing system, fish are kept in high densities and their exposure to microorganisms that can cause infection such as bacteria, parasites or viruses is very high. Under these circumstances, the problem of infectious diseases is becoming very important and has significant results....

In this review article the use of algae as feed in animal nutrition is being examined. The algae evolved on earth 3.5 billion years ago. They are primitive, generally aquatic and photosynthetic organisms, which range in size from 0,2-2,0 µm in diameter-microalgae (phytoplankton) up to 60 m...

Published data on growth and pathology of the fish species: Mugil cephalus (mullet) and Acipenser gueldestaedi (sturgeon), under intensive culture, is limited. In particular, data on dietary requirements is non-existing. For the artificial feeding of these fish, other feeds originally prepared for...

The most important parasitic diseases observed in marine cultured fish in Greece during the period 1995-1999 are described and the aetiological agent, the diagnosis and treatment are summarized.