Seasonal Changes of Glycogen Content in the Hepatopancreas and Musculature of the Carp (Cyprinus carpio L.)

Abstract

Svobodova Z.: Seasonal Changes of Glycogen Content in the Hepatopancreas and Musculature of the Carp (Cyprinus carpio L.). Acta vet. Bmo, 47, 1978: 39-50. The seasonal changes in the mass of hepatopancreas, its absolute and relative amount of glycogen, and hepatopancreas glycogen content per 1 g body mass were investigated in 1211 carP aged 4 months (Kr-1) to two years (KI ). Mter a sharp increase of these parameters during September and October, the highest glycogen amounts were found in November and December (28. 1 ± 1.23 g; 5.58 ± 0.369 g; 19.6 ± ± 0.2 % and 13.5 ± 0.76 mg, respectively). After a considerable drop in April and May, the lowest amounts of glycogen were noted in June and July (4.30 ± ± 0.200 g; 0.19 ± 0.018 g; 4.24 ± 0.326 % and 0.96 ± 0.117 mg, respectively).The parameters under study were closely correlated with water temperature and daylight length.Glycogen content of the white skeletal musculature, measured in 456 C8rP, oscillated from 0.34 ± 0.008 % to 0.81 ± 0.041 % and was found to be rather independent on the water temperature but highly dependent upon the daylight length. Glycogen content in the red musculature near the lateral line tin 300 carP) oscillated from 1.04 ± 0.063 % to 2.71 ± 0.083 % and was found to be highly dependent upon the daylight length. Glycogen content in the heart muscle of 300 carP oscillated from1.46 ± 0.077 % to 2.56 ± 0.049 %, and showed a close correlation to water temperature but only a mild one to daylight length. Circannual variations, water temperature, daylight length, carp.Intensification of fish farming brings about new problems resulting from occurrence of dift'erent predisposition factors. Health control in fish farms thus becomes increasingly important. It consists of external indicators such as the volume value and Fulton's conditional index (Krupauer and Hamai!kova 1973), and internal indicators such as the dry matter and fat content of the fish body (Vavruika and Janei!ek senior 1973). Up to now, little attention has been paid to the fish body glycogen content which is the immediate and readily available source of energy for biological processes, and, in addition, the main source of energy in the hypoxic environment; and the only source of energy in the anoxic water environment of the fish. The aim of the present study was, therefore, to investigate the complex of changes which may occur in the C8rP farming and are likely to inftuence the body glycogen stores of the fish (Svobodova 1976). Patterns of seasonal changes in glycogen content of the hepatopancreas, white and the red skeletal musculature and in the h~ musculature of the C8rP are presented in this paper. Materials and MethodsIn the years 1968-1970, the seasonal cycle of changes in the hepatopancreas mass and its glycogen content was investigated in monthly intervals in C8rP aged 4 months to 2 years (Kr_l and KJ from the experimental ponds No. 70 and No. 64. The fish were reared under semi-operational

Biochemical Profile of Blood Plasma of Tench (Tinca tinca L.) During Pre- and Postspawning Period

“…In contrary, in tench females there were found significantly higher values of glucose concentration in blood plasma in the period of reproduction compared to those found 2 months before reproduction (P < 0.01). This finding confirms the presumption of Robertson et al (1961), Plisecka and Kuzminova (1971), Svobodová (1977) and Zuim et al (1988) which state that gonad development is one of the reasons inducing higher concentration of glucose in fish blood plasma.…”

Stress and metabolic indicators in a relatively high (European sea bass,Dicentrarchus labrax) and a low (meagre,Argyrosomus regius) cortisol responsive species, in different water temperatures

“…Specifically, muscle glycogen was higher in February in both species. In many fish species, seasonal fluctuations have been observed in muscle glycogen content (Svobodova ; Somvanshi ; Coban & Sen ), being affected by environmental conditions such as photoperiod (Svobodova ), and the reproductive status of the fish (Garcia‐Rejón, Sanchez‐Muros & Cerdá de la Higuera ). Stress did not lead to the utilization of muscle glycogen reserves as has been observed in other fish species exercised to exhaustion, such as rainbow trout and winter flounder (Dobson & Hochachka ; Milligan & Wood ; Pearson, Spriet & Stevens ; Pagnotta & Milligan ; Schulte, Moyes & Hochachka ; Milligan & Girard ; Kieffer, Currie & Tufts ; Wang, Heigenhauser & Wood ; Milligan ).…”

Temporal variations in haematological and biochemical indices of the Caspian kutum, Rutilus frisii kutum

“…Increased plasma glucose levels in spring when kutum enter the river can be explained by the cessation of reproductive investment. Previous studies have suggested that increased plasma glucose may be due to an increase of glucose circulation in the blood as a result of glycogen releases to the blood from the liver following glucose conversion at the end of gonad development (Robertson et al 1961;Svobodova 1977;Zuim et al 1988). In addition, lipid and protein levels are recognised as the main energy sources to assist fish migration upriver during spawning season (Beamish et al 1979;Crawford et al 1986;Jonsson et al 1997;Leonard and McCormick 1999); therefore, glucose has normally not been utilised during the migration period (spring).…”