A5088331561- Fish Ecology and Management Studies
- Aquaculture Nutrition and Growth
- Integrated Water Resources Management
- Fish Biology and Ecology Studies
- Reproductive biology and impacts on aquatic species
- Marine and fisheries research
- Agricultural economics and policies
- Aquaculture disease management and microbiota
- Polish socio-economic development
- Nutrition and Health Studies
- Wildlife Ecology and Conservation
- Marine Invertebrate Physiology and Ecology
- Local Governance and Planning
- Coral and Marine Ecosystems Studies
- Water Quality Monitoring Technologies
- Social Issues in Poland
- Aquatic life and conservation
- Insect and Pesticide Research
- Water-Energy-Food Nexus Studies
- Avian ecology and behavior
- Animal Nutrition and Physiology
- Meat and Animal Product Quality
- Identification and Quantification in Food
- Arctic and Antarctic ice dynamics
- Geology and Environmental Impact Studies
Stanisław Sakowicz Inland Fisheries Institute
2018-2024
University of Warmia and Mazury in Olsztyn
2007-2022
The literature on global trends in recreational fishing, the determinants of participation and social embedding fishing public eye are reviewed across world. Data support a conceptual life-cycle model fisheries according to which interest rises rapidly with economic development before leveling off eventually declining. Participation angling globe varies substantially is directly related societal-level developments affecting resources, time, socialization into fishing. Moreover, culture way...
This study compared changes in the biochemical composition of muscles and ovaries maturing female European eels during hormonal stimulation with carp pituitary homogenate under controlled conditions development oocytes. It has been found that differentiation oocyte size eel is visible from beginning gamete maturation process. increases as gonads grow. Furthermore, oocytes are at different stages still highly differentiated terms ovulation. Moreover, body was to change. During process...
The eel is a catadromous fish which spends most of its life in freshwater and adults swim to the Sargasso Sea region spawn. While preparing for reproductive process, eels undergo metamorphosis become what called silver eel; process involving changes colour weight body an increase eye size. These are indicators maturity they facilitate selection reproduction under controlled conditions. During this study, (BW) size female European were observed while being given weekly hormonal injections 20...
The profitability of rearing the rheophilic cyprinid fish species asp, Aspius aspius (L.), and ide, Leuciscus idus in two independent closed recirculating systems was evaluated. were fed live Artemia nauplii exclusively. both profitable financial risk relatively low. From point view profitability, purchase price stocking material most significant factor. juvenile asp 2.5 times higher than that ide. Rearing larval venture.
The aim of the study was to compare dynamics nitrogen and phosphorus compounds in closed (cRAS) semi-closed (scRAS) experimental recirculation systems during intensive culture goldfish juveniles. results obtained underscore varied effectiveness biological nitrification systems, which is dependent on both compound loads water exchange. Additionally, levels (22878.18 mg) (1878.55 accumulation were high cRAS comparison those scRAS (maximum 3797.44 117.41 mg for phosphorus, respectively). This...
Controlled indoor reproduction of European eel is commonly recognized as a prospective tool to prevent extinction this fish species. There little information about diversity bacterial microflora during long maturation under controlled but changing thermal and salinity conditions. Characteristics the composition inhabiting body surface kept firstly in fresh then salt water, may help enhance survival spawners spawning efficiency. Knowledge presence potentially pathogenic species their...
The fish hook is a commonly known tool used in recreational fishing, which one of the forms active, specialised tourism. As component fishing rod, intended to be anchored into mouth and hold on end line while landing it. However, context protection living aquatic resources Catch-and-Release (C&R) its role significance are becoming broader. In addition impact type efficiency, including Catch Per Unit Effort (CPUE), importance selection terms minimising resulting damage tissues caught...
This study determined the optimum thermal conditions to induce gonad maturity in female The aim of was verify which three studied water temperatures: 15ºC, 18ºC or 21°C is most suitable for inducing maturation and reaching by European eel.The regime during period eel should be established nearly individually, depending on degree spawners it lower than that proposed until recently.The found 15°C best temperature bring females maturity.Excessively high temperatures were cause accelerated...
Abstract This study examined and described the basic parameters of catch-and-release angling roach Rutilus rutilus European perch Perca fluviatilis with mormyshka technique. Catch efficiency, size fish caught, time required to unhook total during which were handled, hooking location, occurrence injury initial mortality determined. The indicates that technique is an effective way catch when ice fishing. efficiency catches landings was similar for barbed barbless hooks. also proved be safe...
Recreational fisheries are an important element of contemporary fisheries. Detailed information about the motivation and opinions anglers regarding catch-and-release fishing in post-communist countries, such as Poland, has not been widely available to date. The aim this study was fill gap. We obtained 936 survey questionnaires completed by from throughout Poland. mean annual catch a Polish angler is 126 fish weighing 46.1 kg. Anglers mainly cyprinids, but they would prefer large predatory...
The Warmińsko-Mazurskie Voivodship stands out against other parts of the country in terms its natural assets. Forest complexes, diverse land relief, abundant flora and fauna, but mainly numerous lakes make region attractive to tourists. These results based on a survey study conducted among fishermen provide basis for discussion concerning socioeconomic importance fishing country. It is difficult determine effect this form exploitation aquatic resources region's development recent years by...
Abstract The aim of the study was to compare catch efficiency novice and experienced anglers float fishing with different hook types. mortality fish that were caught released determined based on experience angler type used. mean rates 46.7 per hour, while 33.7 hour. landing using hooks micro-barbs higher than barbless hooks. Angling had a significant impact time required unhook also released. lowest noted in by results suggest angling does not have great parameters characterizing quality...
Aquaculture in rural areas, carried out accordance with current EU requirements, aims to contribute significantly the conservation of biodiversity aquatic resources, protection which is a prerequisite for sustainable economic and social development. The objective this study was present conceptual technical framework analyze costs profitability producing consumer-attractive Eurasian perch (Perca fluviatilis L.) based on untapped potential hatchery infrastructure dedicated earthen ponds common...