Bulletin of the SFI 3 (160) 2003 - The growth rate of the six selected fish species inhabiting in the Polish part of the Vistula Lagoon

The growth rate of the six selected fish species inhabiting in the Polish part of the Vistula Lagoon
Bulletin of the Sea Fisheries Institute 3 (160) 2003, pp. 61-73

Kordian Trella
Sea Fisheries Institute, Kołłątaja 1, 81-332 Gdynia, Poland

Key words: Vistula Lagoon, brackish water basin, Perca fluviatilis, Rutilus rutilus, Pelecus cultratus, Osmerus eperlanus, Scardinius erythtrophtalmus, Gymnocephalus cernuus, growth rate.

Abstract.
The growth rate of perch, razorfish and rudd in the Vistula Lagoon was linear. That of roach, ruffe and smelt was expressed using the von Bertalanffy equation. The equation coefficients for the various species were as follows:

perch: a = 3.05; b = 4.38

razorfish: a = 3.04; b = 9.76

rudd: a = 2.68; b = 5.68

roach : L_inf = 44.96; K = 0.082; t₀ = -1.567

ruffe: L_inf = 18.62; K = 0.206; t₀ = -0.897

smelt: L_inf = 29.37; K = 0.301; t₀ = -0.086

perch:	a = 3.05;	b = 4.38
razorfish:	a = 3.04;	b = 9.76
rudd:	a = 2.68;	b = 5.68
roach :	L_inf = 44.96;	K = 0.082;	t₀ = -1.567
ruffe:	L_inf = 18.62;	K = 0.206;	t₀ = -0.897
smelt:	L_inf = 29.37;	K = 0.301;	t₀ = -0.086