Bream annular

Figure 4 Oxygen consumption by Black Sea species during short-term hypoxia O, Annular gilthead (annular bream) A, sea scorpion , horse-mackerel. (After Stolbov etal., 1995.)...

Horse-mackerel Annular bream Scorpion Fish... 

Few studies aimed at understanding the effects of pressure on metabolism in fish have been performed in the Black Sea or Sea of Azov because no distinct stratification was found in the distribution of water animals there. The Sea of Azov is saucer-like, its maximum depth being only 15 m, and in the Black Sea the oxygenated water layer extends only to 150 m depth. However, Emeretli (1996) has shown that activity of lactate dehydrogenase in the liver increases 2-10 times in scorpion fish and annular bream placed in a barorespirometer (designed by A. Stolbov) and sunk to a depth of 300 m. This response seems to be peculiar to shallow-water species (Hochachka and Somero, 1984). 

Proteolytic digestive enzyme activity in sluggish Black Sea fish (e.g. toad goby, scorpion fish) has been found to be equal to and sometimes greater than that of the active fish (e.g. horse-mackerel, annular bream, pickerel). The aminolytic activity of fish of low mobility is also greater (Ugolev and Kuzmina, 1993). It will further be shown in Chapter 5 that the consumption and assimilation of food occur more efficiently in sluggish than in active fish. 

The levels of metabolism of Black Sea fish in relation to their natural mobility were determined by Belokopytin (1990). First, the relationship between swimming rate and oxygen consumption in a Brett-type tunnel respirometer was determined, using horse-mackerel, pickerel, anchovy and annular bream. The relationship is described by the equation ... 

Serebrennikova, T.P., Silkina, E.N., Shmelev, V.K., Morozova, A.L. and Nesterov, V.P. (1991). The regulation of glycogenolysis in skeletal muscle of annular bream during intensive performance as dependent on temperature (In Russian). Zhumal Evolutsionnoy Biokhimii i Physiologii 27,427-431. 

---