Seasonal changes in serum glucose and condition of the plaice, Pleuronectes platessa L.

Abstract

Monthly sampling of plaice caught off the north‐east coast of Scotland between February 1983 and May 1984 revealed a seasonal increase in condition factor, hepatosomatic index and serum glucose, which appeared to be related to the period of active feeding. The spleen indices followed a similar seasonal increase, although this was not statistically significant, while the kidney indices showed little change over the 16 months. The peak for the gonadosomatic index was in February/March 1984, but among these plaice (aged 4–5 years) there were still large numbers of immature males and females and there was no increase in 1983. Apart from the hepatosomatic index for January 1984, there was no significant difference between male and female plaice.

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“…Prevalence, mean intensity and parasite abundance values were calculated according to Bush et al (1997). The condition factor (CF), hepatosomatic index (HSI), spleensomatic index (SSI), bile somatic index (BSI) and gonadosomatic index (GSI)were calculated for each fish as outlined by White and Fletcher (1985).…”

Histopathological effects of Cyperdicot and vitamin E supplementation on selected organs of Clarias gariepinus (Burchell, 1822) reared in a tropical fish farm in Nigeria

“…The condition factor (CF) and hepatosomatic index (HSI) of the fish were calculated after White and Fietcher (1985) as follows:…”

Physiological effects of paraquat in juvenile African catfish Clarias gariepinus (Burchel 1822)

“…The remainder of blood sample was centrifuged at 10 000 r/min in a cooling centrifuge for 5 min to obtain plasma, which was used for estimating glucose, protein, AST, and ALT. At the end of the duration of each exposure, body weight, liver weight and standard length of each fish were recorded, while CF and HSI were calculated following the method of White and Fietcher [24], as: CF=Body weight (g)/Standard length (cm) 3 …”