Maraena whitefish (Coregonus maraena) larvae reveal enhanced growth during first feeding with live Artemia nauplii

Abstract

Citation: Bochert R., Horn T., Luft P. 2017 -Maraena whitefish (Coregonus maraena) larvae reveal enhanced growth during first feeding with live Artemia nauplii -Arch. Pol. Fish. 25: 3-10.Abstract. Newly hatched Coregonus maraena (Bloch) larvae reared in aquaria were observed during two trials in 2014 and 2015 for 42 and 34 days after hatching in order to determine the on-feeding effects of different feeding strategies on growth and survival. Feeds of commercial dry feed, live Artemia nauplii, frozen rotifers, and mixtures of these were compared. Larval whitefish were fed brine shrimp for up to 13 days beginning 4 days post hatch (dph). Whitefish larvae fed live Artemia for 8-9 h per day over a period of 10-12 days grew considerably larger (mean value of final total length (TL) 27.3-33.0 mm)) and were heavier (mean value of final body weight (BW) 112-165 mg)) than those fed dry feed, frozen rotifers, or Artemia for 3-6 days (TL= 22.6-30.2 mm; BW= 50-102 mg). The growth of larvae fed for 24 h solely on dry food was comparable (BW= 101 mg, TL= 26.6 mm) at 42 dph. Survival differed among groups (31-63%) and was highest for larvae fed dry food exclusively. Our results can improve the first feeding of Maraena whitefish larvae in small-scale fish farms.

Effect of feeding strategy on survival, growth, intestine development, and liver status of maraena whitefish Coregonus maraena larvae

“…The LF group showed highest length and body weight values during the first 20 days of the trial, and AF produced inferior results throughout the trial. Our results are similar to those of Bochert et al (2017) at 30 days, who reported enhanced growth in maraena whitefish larvae fed live Artemia nauplii at first feeding. Fish fed Artemia 6–16 dph and AF 17–42 dph displayed the highest TL and W from Day 7 to Day 42.…”

“…Fish fed Artemia 6–16 dph and AF 17–42 dph displayed the highest TL and W from Day 7 to Day 42. With respect to growth, our results are superior to those obtained by Bochert et al (2017). Growth of fish reared at low water temperatures (Leithner & Wanzenbock, 2015) has been reported lower compared to findings of the present study.…”

“…A similar dramatic increase in mortality from 30 to 40 days of rearing was observed by Esmaeilzadeh‐Leithner and Wanzenböck (2018). Importance of using LF during early phases of larval rearing is also highlighted by Bochert et al (2017).…”

“…For maraena whitefish, this is generally propionic acid (Lahnsteiner & Kletzl, 2015). Larval feeding on nematodes (Hundt et al, 2015), rotifers, or a combination of rotifers and Artemia (Bochert et al, 2017) has also been tested in this species.…”

Combined effect of temperature and live feed period on growth and survival of Coregonus maraena (Bloch, 1779) larvae

“…Recent work with Maraena whitefish suggests both live and dry feed is possible (Bochert, Horn, & Luft, ; Luft & Bochert, ) but the combined effects of elevated temperatures (e.g. range of 16–20°C) and different feeding regimes have not been examined so far.…”