Cryopreservation Studies in Aquaculture from Past to Present: Scientific Techniques and Quality Controls for Commercial Applications

In this section, cryopreservation of fish genetic resources, which is one of the important applications to ensure the sustainability of genetic resources of freshwater fish species, is discussed. At the same time, information is provided about the possible sources of contamination that may be encountered during cryopreservation applications. In this context, the results of sperm, egg, and embryo cryopreservation studies of fish and their success and failure in applications were evaluated in addition to the process from past to present. Information is given about the contamination that may develop depending on the applications in the process of cryopreservation and dissolving processes, as well as the studies carried out to eliminate extracellular disease agents. In the section, in addition to the evaluation of the results of scientific studies, commercial companies that commercially carry out gamete cryopreservation applications are also included. The contamination that may develop depending on the applications in the process of cryopreservation and thawing processes, as well as the studies carried out to eliminate extracellular disease agents are mentioned

Atypical Aeromonas Infection in Cultured Sea Bass (Dicentrarchus labrax) in the Black Sea

The Black Sea, an inland sea, has contributed about 70% to the total fish production of Turkey for many years. Because of its low salinity and appropriate water temperature, both freshwater and marine fish such as salmon, trout, and sea bass can be cultured in the Black Sea. The aim of this study was to identify the etiological agent of mortality that occurred in sea bass in the Black Sea during July 2002. Bacteria isolated from kidneys and livers of infected fish were identified as Aeromonas salmonicida achromogenes according to morphological and biochemical characteristics, API 20NE results, and an agglutination test for A. salmonicida. The diseased fish had petechial hemorrhages on the bottom of the fins and lesions on the lateral and ventral sides of the body. Cumulative mortality was approximately 20%. This is the first report of A. salmonicida achromogenes associated with sea bass in Turkey

Marine Aquaculture in Turkey: Advancements and Management

Fish diseases are divided into two categories as infectious and non-infectious.Infectious diseases affecting marine fish culture in Turkey will be explained inthe following sections in this chapter. Academics and representatives of fishhealth consulting companies compiled this section with a joint effort to combinescientific approaches and field experiences together

Antibacterial Activity of Citrus limon Peel Essential Oil and Argania spinosa Oil Against Fish Pathogenic Bacteria

The main objective of the study was the identification of antibacterial activity of lemon (Citrus limon L.) peel essential oil and argan (Argania spinosa L.) oil against fish pathogenic bacteria. Antibacterial activity was determined against six different fish pathogens (Yersinia ruckeri, Aeromonas hydrophila, Listonella anguillarum, Edwarsiella tarda, Citrobacter freundii and Lactococcus garvieae). Essential oil derived from lemon peel and argan oil were applied against the bacteria using the disc diffusion and micro dilution method under in vitro conditions. The disc diffusion results indicated that essential oil of naturally C. limon peel and argan oil significantly inhibited the growth of Y. ruckeri, A. hydrophila, L. anguillarum and C. freundii. Our results suggested that the use of lemon peel essential oil and argan oil induced a stronger antibacterial effect