Bulletin of the SFI 2 (162) 2004 - Some data on snoek (Thyrsites atun Euphrasen 1791) from the Hokitika region (Challenger Plateau, Tasman Sea)

Some data on snoek (Thyrsites atun Euphrasen 1791) from the Hokitika region (Challenger Plateau, Tasman Sea)
Bulletin of the Sea Fisheries Institute 2 (162) 2004, pp. 41-52

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

Key words: snoek, Thyrsites atun, New Zealand, growth.

Abstract.
This paper presents the results of Polish studies of snoek from the Hokitika region (Challenger Plateau, Tasman Sea). The growth rate of males and females is described. The dependencies obtained were described with the von Bertalanffy equation. The coefficients of the equations were as follows:
males: L_inf = 84.55; K = -0.338; t_o = 0.645;
females: L_inf = 83.60; K = -0.481; t_o = 1.955;
the sexes combined: L_inf = 84.07; K = -0.380; t_o = 0.999.

The studies indicated that the growth rate of male and female snoek from the Hokitika region were similar. The average back-calculated length did not differ much from the average derived from empirical data from the same age groups.