In this study, the effects of three different cooking methods (boiling, sous-vide cooking, microwave cooking) were evaluated on the nutritional content value of blast chilled crayfish. Proximate, fatty acid and amino acid composition, vitamin and mineral contents of crayfish were investigated before and after the cooking processes. It was determined that the cooking methods with the least loss of vitamins and minerals were sous vide and microwave cooking. On the other hand, it was determined that there was no loss in EPA fatty acid in the boiling (BC) group samples, but there was a significant loss in the sous vide cooking (SVC) and microwave cooking (MC) group samples. In addition, the loss in DHA fatty acid in all groups cooked in DHA fatty acid was found to be statistically significant (p<0.05). While sous vide cooked crayfish had the highest protein content, microwave cooking was determined as the most appropriate cooking method in terms of EAA (Essential Amino Acids) ratio. Consequently, it had been suggested that the sous vide and microwave cooking methods were the best methods preserving the nutritional value compared to the boiling method.

In this study, trials were conducted to assess the impact of cysteine addition to activation solution on sperm motility of Çoruh trout (Salmo coruhensis). In the trial, we used to different concentrations [0 mM (Control), 1 mM, 2 mM and 4 mM] of cysteine. Sperm motility characteristics and motility were determined. The current study revealed that the presence of cysteine resulted in an increase in sperm motility. The increases in duration (39.00±6.98 s) and motility rate (96.67±5.77%) at 2 mM were statistically significant (p<0.05). Overall, supplementation of cysteine to activation solution can increase the sperm motility of Çoruh trout and high doses of cysteine cause reduction on sperm motility.

This study was conducted to determine the socio-economic features of inland aquaculture managers in Malatya Province (Türkiye) and includes the research results of 32 inland trout farmers which are registered in Directorate of Food, Agriculture and Animal Husbandry of Malatya Province in 2016. Total number of registered facilities (cages + ponds) is 77 in Malatya. Aquaculture production was 3520 metric tonnes per year and 450 metric tonnes of them (12,78%) was cultured in ponds and raceways according to the statistical data for 2015. Although managers stated that they are pleased to deal with aquaculture, supportings should be given to fish feed instead of productions. The vast majority managers are members of the aquaculture association. The water that used for aquaculture was obtained from river and spring water. Managers said that trouts were mostly sold to local restaurants and fewer amounts were sold as retail. It has been seen that the age of the managers changed between 40-66 and all of them are married males. When the educational status was examined it was seen that 45% of them have high school graduates. It was stated that 50% of them are tradesman, 35% of them are farmers, 5% of them are fisherman and all of them have social assurance. All of managers live in their own home and 95% of them have car or van. It was also observed that 85% of managers were educated about aquaculture.

The decrease in quality and death of sperm cells are triggered due to the generation of reactive oxygen species (ROS). Hence, the assessment of oxidative damage and antioxidant status are important. For this purpose, activity of antioxidant enzymes [catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD)] and lipid peroxidation [Malondialdehyde (MDA)] were examined in sperm cells of Padanian barbel (Barbus plebejus) and chub (Squalius orientalis). In addition, duration and percentage of spermatozoa were assessed. Based on our data, GPx (43.47±0.02 U g-1 protein) and malondialdehyde (2.52±0.02 nmol.g-1 cell) levels in B. plebejus were higher compared to spermatozoa of S. orientalis. Collectively, alterations in malondialdehyde levels and the antioxidant status could be species-specific differences.

In this study, Black Sea trout (Salmo trutta labrax, Pallas, 1811) and Rainbow trout (Oncorhynchus mykiss, Walbaum 1792) were reared in mono and duo-culture groups. Duo-culture groups were designed to include changing numbers of individuals for each species to assess the effect of dominance. The effect of the culture strategy on growth and survival rates during the feeding transition period was compared. The growth performance of mono and duo-culture groups were found similar whereas the survival rates of the groups differed significantly. The survival rate of the duo-culture group with the 75/25 stock density for two species was found lower when compared with monoculture groups and groups of 50/50 stock density. The feed conversion ratio (FCR) for all groups was similar.

The comparison of body height in Çoruh trout (Salmo coruhensis) and rainbow trout (Oncorhynchus mykiss) larvae under culture conditions is reported for the first time. In this study, the assessment of some biometric characteristics was aimed in S. coruhensis and O. mykiss larvae under the culture conditions. Length (mm), weight (mm) and body height (mm) of two species were measured after three months. Mean length, weight and body height of Salmo coruhensis and Oncorhynchus mykiss larvae were determined as 24.42±1.48 mm and 26.73±1.71; 0.08±0.01 g and 0.12±0.02 g; 3.23±0.44 mm and 3.82±0.43 mm, respectively. The body height in O. mykiss larvae was higher than S. coruhensis larvae under culture conditions.

Morphometric Parameters Comparison of Viviparus contectus(Millet, 1813) in Demirköprü Dam Lake, Turkey using multivariate statistical methods

Large plastic debris is broken down into smaller pieces by different mechanisms such as weathering, light degradation and biodegradation, eventually turning into microplastics (?5 mm). Microplastics can also enter the marine ecosystemsdirectly via rivers, waste discharges, and the dumping of waste by the people. Marine organisms are directly and indirectly exposed to accidental feeding from microplastics. Microplastics, apart from the physical effects of being consumed by living organisms, can be a carrier of contaminants to be absorbed. Numerous studies have reported pollutants can be absorbed by microplastics and enriched in seas and oceans. Therefore, the study of the presence, distribution and accumulation of microplastics in aquatic ecosystems can create a comprehensive model in the integrated management of these emerging pollutants. In this study,the origin, fate and behavior of microplastics in marine ecosystems wereexamined to determine the sources of microplastics in these ecosystems and their effects on living organisms and trophic transmission.

Over the last few decades, aquaculture has undergone a dramatic expansion in production, becoming a key source of food for people in many countries. Indeed, aquaculture has become extremely important for food security. However, the rapid expansion has ledto many concerns, such as the effects of water shortages, pollution, disease and the depletion of natural fish stocks used as protein and fat sources for aquaculture diets. Against this backdrop, there has been a growing awareness of the need for sustainability to ensure the long-term future of aquaculture. Thus, there have been tremendous efforts made to incorporate the latest procedures to ensure sustainability. For example, the industry has not been slow to address the benefits of polyculture, offshore rather than coastal sites for mariculture, the use of aquaponics and land-based recirculation systems, and improved disease management, including mitigation against the adverse effects of pollution, such as the use of biofloc technology. The therapeutic approach to disease control has moved towards prophylaxis, notably immunoprophylaxis and the use of probiotics and phytobiotics. Unfortunately, there are challenges resulting from the effects of environmental change, i.e. global warming. Some solutions havebeen found by use of new technologies, including nanotechnology. All these aspects are considered in this review.

In order for a work that can be applied to the benefit of humanity to be continuous, it is essential that the work done is also of a nature to protect the nature. It is obvious that we, who work in aquaculture, should be much more careful in this regard. We know that we made unforeseen mistakes in the 1970s, when we first started aquaculture in Turkey, and in this period when we believed we were very careful. In those years, our technical knowledge was not enough. When we came to the 2000s, problems began to arise in sheltered bays that were close to the coast and were likely to be polluted. Especially in terms of tourism, discussions were increasing. As a result of this, as we approached 2010, the cage units were forced to move away from the coast, and as a result, large cage units were established 1-2 km from the coast, which will not have a negative effect on tourism. It is among our thoughts to expect developments that will not harm the environment with the technologies that will develop in places 8-10 km or even further from the coast, even in the open seas, and the establishment of underwater large diving cages in the coming years. As a result, sustainable aquaculture will be implemented with less negative impact on the environment and a significant contribution to the economy. In addition to the studies in the seas, we started to work in inland waters on trout breeding in the 1970s. In those years, if a facility was established in a stream or creek for production areas, we would never allow the latter. Because we thought that the dirty water coming out of a facility would harm a business to be established near this facility. Later on, we tried to expand the production areas by evaluating every possibility. However, it is a fact that some of our lakes and dams have problems due to over-projecting. When it comes to these days, we can say that we are much more sensitive to the environmental impact of fish farming. Of course, as technologies have improved, our possibilities to build large cages have increased Thus, it is among the issues that should not be neglected that our universities support the researches to be discussed and provide support to the research on this subject. Meanwhile, scientists and environmentalists also have important duties. Thus, it is a definite judgment that while developing fish production issues, being sustainable is an issue that should not be neglected in terms of the success of the studies. It should not be overlooked that sustainable research is among the very important and cannot be neglected issues for future sustainable aquaculture studies.

Seaweeds have been used in the human diet for centuries, particularly in Asia. Green seaweed from the genus of Caulerpais consumed throughout the Pacific and Southeast Asia, with high economic value. In the Philippines, Caulerpa spp. are one of the seaweed delicacies among locals eaten as salads. In Tawi-Tawi, southern Philippines, Caulerpa racemosavar. occidentalis is one of the edible seaweeds which is sold in the market center in Bongao, Tawi-Tawi and Tongehat, Sibutu, Tawi-Tawi is one of the sources of this seaweed. However, the microbial load of this green seaweed has not yet been explored and has remained unstudied. Hence, in this study, we determined the microbial load (colony-forming unit, CFU) of heterotrophic marine bacteria, Vibrio, and marine fungi from C. racemosavar. occidentalisin coastal waters of Tongehat, Sibutu, Tawi-Tawi, Philippines, following the serial dilution procedure. Results revealed that the heterotrophic marine bacteria recorded the highest abundanceof 5.9 x 1010CFU g-1. Vibrio abundance was 1.2 x 102CFU g-1, and marine fungi load was 4.1 x 103CFU g-1. The low presence of Vibrioin this study indicates that the C. racemosavar. occidentaliscontains low potential pathogens and may be safe for human consumption.

How sustainable is sustainable living without sustainable aquatic research? Our academic journal, "Sustaniable Aquatic Research", which aims to contribute to raising awareness for sustainable life by bringing sustainable aquatic research together, has started its publication life. The subjects that make up the scope of SaquaRes have been carefully selected to serve this purpose, and have been designed with the thought that they will contribute to more sustainable life on our planet. I would like to thank all researchers and readers who have sent or will send articles to SAquaRes, who have visited or will visit the journal site, and especially those who contributed to the formation, emergence, and development of this idea. As the SAquaRes team, we promise that we will dedicate all our energies to the journal to reach its goal. "Sustainable life in the world will be realized with sustainable aquatic research"

Nile tilapia(Oreochromis niloticus)has become a fast-growing aquaculture species in Bangladesh. This study investigated the status of existing practices for monosex tilapia production in aquaculture farms of Bangladesh. The data were collected using a structured questionnaire. The survey revealed thatown hatchery origin brood fishes were used by 50%, 44% and 33% hatcheries in Mymensingh,Jessoreand Cumilla, respectively. The weight of broods ranged from 200 to 350 g. The majority of hatcheries of Mymensingh (50%) and Jessore (83%) maintained male: female ratio of 1:2, but 50% hatcheries in Cumilla maintained 1:1 ratio for breeding. Average dose of hormone (17a-methyltestosterone) for producing monosex (all male) tilapia seed was 77.50 mg/kg feed, 57.50 mg/kg feed, 51.00 mg/kg feed in Mymensingh, Jessore and Cumilla, respectively. The average sex reversal rate was the highest (92.5%) in Mymensingh followed by 89% in Jessore and 83% in Cumilla. The highest average survival rate of fry was found in Mymensingh (77%) followed by Jessore (75%) and Cumilla (63%). Monitoring of monosex tilapia production process using 17a-methyltestosterone is needed to help enhance the quality and maximize the production of tilapia monosex seed.