Sudden weaning of angel fish pterophyllum scalare (Lichtenstein) (Pisces; Cichlidae) larvae from brine shrimp (Artemia sp) nauplii to formulated larval feed

Abstract

This study investigated the effects of sudden weaning of angel fish larvae (Pteraphylum scalari) from Artemia nauplii to commercial larval feed. Four days post hatch (DPH) larvae were reared in four different weaning protocols (TR1-TR4) with triplicates in a complete randomize design. Larvae in TR1 and TR4 were exclusively fed Artemia nauplii and dry feed respectively. In TR2 and TR3, larvae were initially fed Artemia nauplii and suddenly wean to formulated feed on 14 DPH and 7 DPH respectively. The experiment was lasted for 28 days. At the end of the experiment, final mean weight (FW), total length (FL), height (FH), Daily Weight Gain (DWG), Specific Growth Rate (SGR), survival and stress index were compared. Significantly highest (P < 0.05) FW, DWG and SGR were observed in TR1 and TR2 while former values of TR3 were not significantly different from TR1. Highest FL observed in TR1 and TR2 while FL of TR2 was statistically similar to that of TR3. The poorest growth was observed in larvae solely fed formulated feed. Survival and the stress index were independent from weaning methods. Although sudden weaning is possible on 7 DPH, larvae showed comparatively higher growth when switch off to formulate feed on 14 DPH.

Improving co-feeding strategies for Neotropical green terror cichlid (Aequidens rivulatus ) larvae with lecithin-enriched Artemia franciscana nauplii: Effects on survival, growth performance and body composition

“…Also, regarding to feeding regimes fish larvae fed with Artemia nauplii for 25 and 10 days had high SR than those fed with Artemia nauplii for 1 and 5 days. Similar observations have also been reported for Paralichthys dentatus (Bengtson, ), Solea senegalensis (Ribeiro, Zambonino‐Infante, Cahu, & Dinis, ), Paralichthys olivaceus (Teshima, Koshio, Ishikawa, Alam, & Hernandez, ), Danio rerio (Carvalho, Araújo, & Santos, ), Paralichthys lethostigma (Faulk & Holt, ), Pterophyllum scalare (Herath & Atapaththu, ) and S. Lucioperca (Ljubobratović et al, ).…”

Stocking density in Colossoma macropomum larviculture, a freshwater fish, in recirculating aquaculture system

“…Larviculture is considered a critical stage of fish production (Evangelista et al., 2020; Herath & Atapaththu, 2013; Kolkovski, 2001; Santos & Luz, 2009). The success of this phase is determined by a combination of factors such as nutrition, immunity, water quality, stocking density (Herath & Atapaththu, 2013) and temperature (Kujawa et al., 1997; Kupren et al., 2011). The use of an adequate stocking density is commercially beneficial since the use of tanks, water and economic resources is maximized (Fairchild & Howell, 2001).…”

Effect of weaning initiation time and feed pellet size on peled Coregonus peled (Gmelin 1789) larviculture

“…Early life stages of many fish species require live prey to provide energy for growth and development of the alimentary tract (Palińska-Żarska et al, 2014). Rearing live feed is costly and labour-intensive (Faulk & Holt, 2009;Herath & Atapaththu, 2013;Person-Le Ruyet, 1989), and a gradual transition from live feed to dry diets is widely practised (Baskerville-Bridges & Kling, 2000;Ljubobratović et al, 2015;Palińska-Żarska et al, 2014). Many studies have documented high larva mortality following the weaning process (Engrola, Dinis, & Conceição, 2010;Kestemont et al, 2003), which may substantially affect production and the economic viability of the hatchery (Engrola et al, 2010).…”