caa a22 4500 605463999 CHVBK 20210128100256.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10499-014-9794-2 doi (NATIONALLICENCE)springer-10.1007/s10499-014-9794-2 Changes in European eel ovary development and body and ovary chemistry during stimulated maturation under controlled conditions: preliminary data [Elektronische Daten] [Joanna Nowosad, Dariusz Kucharczyk, Joanna Łuczyńska, Katarzyna Targońska, Tomasz Czarkowski, Maria Biłas, Sławomir Krejszeff, László Horváth, Tamás Müller] This study compared changes in the biochemical composition of muscles and ovaries of maturing female European eels during hormonal stimulation with carp pituitary homogenate under controlled conditions and in the development of oocytes. It has been found that differentiation of oocyte size in eel is visible from the beginning of the gamete maturation process. This differentiation increases as gonads grow. Furthermore, oocytes are at different development stages and are still highly differentiated in terms of size during ovulation. Moreover, the biochemical composition of the body and gonads was found to change. During the process of maturation, the relative fat content in the eel body decreases both in the muscles (from 21.99±4.3 to 18.48±3.3%) and in gonads (from 25.76±2.71 to 15.21±4.7%), with the changes in ovaries being more rapid. Protein content in muscles also decreased (from 15.98±3.13 to 12.35±1.6%) during the process of female maturation. Different trends were observed for polyunsaturated fatty acids (EPA and DHA). The total amount of these acids decreased in muscles (P<0.05) but increased in ovaries (P>0.05). The Author(s), 2014 European eel nationallicence Fat nationallicence Maturation nationallicence Oocyte diameter nationallicence Protein nationallicence Nowosad Joanna Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut Kucharczyk Dariusz Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut Łuczyńska Joanna Department of Commodity Science and Food Analysis, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland aut Targońska Katarzyna Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut Czarkowski Tomasz Warmia and Mazury Centre for Agricultural Consulting, Olsztyn, Poland aut Biłas Maria Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut Krejszeff Sławomir Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut Horváth László Department of Fish Culture, Szent István University, Páter K. u. 1, 2100, Gödöllő, Hungary aut Müller Tamás Department of Fish Culture, Szent István University, Páter K. u. 1, 2100, Gödöllő, Hungary aut Aquaculture International Springer International Publishing 23/1(2015-02-01), 13-27 0967-6120 23:1<13 2015 23 10499 https://doi.org/10.1007/s10499-014-9794-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10499-014-9794-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nowosad Joanna Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut NATIONALLICENCE 700 1- Kucharczyk Dariusz Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut NATIONALLICENCE 700 1- Łuczyńska Joanna Department of Commodity Science and Food Analysis, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland aut NATIONALLICENCE 700 1- Targońska Katarzyna Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut NATIONALLICENCE 700 1- Czarkowski Tomasz Warmia and Mazury Centre for Agricultural Consulting, Olsztyn, Poland aut NATIONALLICENCE 700 1- Biłas Maria Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut NATIONALLICENCE 700 1- Krejszeff Sławomir Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Al. Warszawska 117A, 10-957, Olsztyn, Poland aut NATIONALLICENCE 700 1- Horváth László Department of Fish Culture, Szent István University, Páter K. u. 1, 2100, Gödöllő, Hungary aut NATIONALLICENCE 700 1- Müller Tamás Department of Fish Culture, Szent István University, Páter K. u. 1, 2100, Gödöllő, Hungary aut NATIONALLICENCE 773 0- Aquaculture International Springer International Publishing 23/1(2015-02-01), 13-27 0967-6120 23:1<13 2015 23 10499