The aim of the study was to identify the dependence between the rearing indicators of European pikeperch, Sander lucioperca (L.), (body weight range 15-2000 g, age 0+, 1 +, 2+, 3+) reared in closed recirculating aquaculture systems (RAS) and fish sex. The study material was obtained from artificial reproduction, and the sex of the fish was determined after they were sacrificed. Fish body weight and body length, the body weight coefficient of variation CV, the K and Fulton coefficients of condition, and the hepatosomatic index HSI of males and females were similar in the analyzed fish size groups. Statistically significant differences between the sexes were noted in the absolute weight of the viscera in fish aged 3+ (female body weight = 2.1 kg; male body weight = 1.8 kg), which was 89.2 g (males) and 211.9 g (females) (P < 0.05). The values of VSI in this fish size class were significantly higher among females than males (14.3 and 10.1%, respectively) (P < 0.05). The results permit concluding that the potential development and implementation of production techniques for single-sex pikeperch populations might be economically justified and more advantageous for longer-term rearing of this species in RAS.
W pracy przeprowadzono oceną rozmiarów i składu ciała w powiązaniu ze stopniem niezależności w przygotowywaniu posiłków. Badania przeprowadzono wśród 61 osób (34 kobiet i 27 mężczyzn) mieszkających w rejonie Olsztyna. Oceny rozmiarów i składu ciała dokonano metodami antropometrycznymi, a udział badanych w przygotowywaniu posiłków określono na podstawie kwestionariusza (Senior Food-QOL).
EN
The objective of the undertaken study was to evaluate physical measures and body composition of elderly people in connection with the degree of independence in meals preparation. Study was carried out in 2003 and 2004 on the group of 61 people (34 women and 27 men), belonging to two age groups (65-74 and 75+ years old), and living near Olsztyn. Participants were recruited using snow ball method. The evaluation of physical measures and body composition was conducted on the group of 40 people (20 women and 20 men) using anthropometric methods. The assessment of bone tissue was performed by the ultrasonographic method. Participants' involvement in meals preparation at home was determined on the basis of SENIOR FOOD QOL questionnaire. Appearance of overweight or obesity was observed in about 90% of participants, including obesity of androidal type in more than half of eases. In 34% of participants the risk of ostheopenia and in 66% of participants the risk of ostheoporosis was confirmed. It was found that there is no relation between somatic and densitometric indices and degree of independence in meals preparation in elderly people.