The effect of body size and water temperature on the results of intensive rearing of pike-perch, Stizostedion lucioperca (L.) fry under controlled conditions

Abstract

Abstract. Studies were carried out on the effect of initial size summer pikperch fry, Stizostedion lucioperca, (two size groups), water temperature (22 and 24°C), and food type (zooplankton or artificial feeds) upon the results of rearing in controlled conditions. Weight and total length of the fish at the beginning of the experiment amounted respectively to 0.25 ± 0.06 g and 32.9 ± 2.7 mm (group S), 0.53 ± 0.06 g 39.4 ± 1.6 mm (group L). No significant effect of the initial fish size and water temperature on fish survival and losses due to cannibalism was bserved in fish which fed on zooplankton (p > 0.05). Statistical analysis revealed significant effect of initial fish size (p = 0.0011) as well as water temperature (p = 0.0001) on the survival in the groups of fish reared on artificial food. These fish attained bigger size (body weight and length) than fish in the control group (feeding on live zooplankton) (p < 0.05). Temperature had no effect on growth rate of the fish, those reared on artificial as well as natural food.

Intracohort cannibalism and methods for its mitigation in cultured freshwater fish

“…Pikeperch larvae behave similarly (Zakęś 2012), although in burbot (Lota lota) the impact of higher temperature on an increase in cannibalistic incidents has only been reported for larval and juvenile developmental stages and the relationship with temperature has not been examined (Barron et al 2012). Pike larvae behave the opposite; the lowest losses due to cannibalistic behaviour have been observed at the highest temperatures investigated (28°C) (Szczepkowski 2009).…”

“…The outcomes of these two types of cannibalism differ in the level of mortality. In the case of type I, it ranges between 1.5 and 12.0% of the initial stock of European perch (Perca fluviatilis) larvae (Baras et al 2003;Babiak et al 2004;Król and Zieliński 2015) and from 10 to 17% in the stock of pikeperch (Sander lucioperca) larvae (Zakęś and Demska-Zakęś 1996;Zakęś 2012;Król and Zakęś 2016) or even 40% in dorada (Brycon moorei) (Baras et al 2000b). Type II usually generates significantly higher losses and is mainly reported in a stock characterised by a large heterogeneity in size (Król and Zieliński 2015).…”

“…For most fish species, this results in an increased demand for food, faster depletion of food resources, marked heterogeneity of larvae and, as a result, in potential cannibalistic behaviour (Sunde et al 1998;Baras and Jobling 2002;Kestemont et al 2003;Zakęś 2012). Rearing temperature should fall within the thermal comfort zone, which is specific for a given species and population.…”

Aggressive and cannibalistic behavior of African catfish larvae: effect of different doses of methyltestosteron injecting to female broodstock and larval stocking densities

“…On the other hand, TAN and nitrite exceeded the tolerable range of catfish. Zakęś (2012) and Wu et al (2015) mentioned that a warm temperature (22-24°C) is the potential to boost feed consumption so that cannibalism happened. Besides, Solomon and Udoji (2011) and Kawamura et al (2017) explained that DO, pH, ammonia, nitrogen, and salinity are considered to affect the eating habit, stress, and survival rate.…”

The effect of application of semimoist feeding mixture when converting the advanced fry of zander (Sander lucioperca) to intensive culture conditions

“…This advanced fry is adapted and converted to artifi cial diet under controlled conditions. Survival rate during the period of conversion is of decisive importance for the total success of stockfi sh rearing and it ranges within 24 -80%, most frequently about the 50% limit (ZAKĘŚ, 1997a,b;1999;SZKŪDLAREK and ZAKĘŚ, 2002;LJUNGGREN et al, 2003;BARÁ-NEK et al, 2004;MOLNÁR et al, 2004b).…”