Weaning of Senegalese sole (Solea senegalensis) postlarvae to an inert diet with a co-feeding regime

Abstract

The objective of this study was to evaluate the weaning success of Senegalese sole, Solea senegalensis, postlarvae when cofed a compound diet, by means of the analysis of growth parameters (relative growth rate [RGR] and condition factor [K]), survival, protein and lipid content. Total ammonia in the rearing water was also measured. The experiment lasted for 46 days (36 to 82 days posthatching). One group was fed only with enriched Artemia sp. metanauplii (Artemia treatment), whereas in another group, the Artemia sp. metanauplii were gradually replaced by the International Council for the Exploration of the Sea (ICES) diet over a period of 39 days (ICES treatment). Postlarvae were sampled on rearing days 0, 9, 23, 30, 39 and 46 for growth and biochemical analysis. Water was sampled on rearing day 30 during a 24-h cycle in both treatments. Postlarvae from the ICES treatment were weaned, though by the end of the experiment the Artemia treatment exhibited significantly higher values for growth, RGR, K and survival rates (P < 0.05). No significant differences were observed concerning total lipid content. Protein content was significantly higher for the Artemia treatment after 46 days of rearing (P < 0.05). The total ammonia nitrogen concentration in the water increased after each meal and remained below a harmless level for postlarvae.

Effects of Replacement of Live Food With Dry Diet on Growth and Survival Rate for Seabream (Sparus Aurata) Larvae

“…(Hamza et al 2008). The obtained results in the present study are relatively in agreement with those obtained by Ribeiro, et al (2005). They evaluated the weaning success of Solea senegalensis larvae.…”

“…The obtained results indicated that the late weaning of larvae (60 dph) significantly (P<0.05) increased each of protein and fat content of larvae when compared to the early weaning (35 dph). For the same trend, Ribeiro, et al (2005) found that, Senegalese sole Solea senegalensis post larvae fed a compound diet adapted to the diet at the end of the experiment, but post larvae from the artemia treatment exhibited significantly (P<0.05) higher values for protein and total lipid contents.…”

Induced breeding and larval rearing of Surubí, Pseudoplatystoma fasciatum (Linnaeus, 1766), from the Bolivian Amazon

“…The early weaning of 15 dph larvae after natural zooplankton feeding has not yet been tested in this species. Nevertheless, this possibility has been tested successfully in marine species like Red porgy ( Pagrus pagrus ), with a weaning protocol (co‐feeding) involving live prey and dry diets (Aristizábal & Suárez 2006), or Sole ( S. senegalensis ) (Ribeiro, Engrola & Dinis 2005).…”

Comparing skeletal development of wild and hatchery-reared Senegalese sole (Solea senegalensis, Kaup 1858): evaluation in larval and postlarval stages

“…Modern day aquaculture, requiring intensive production of fish, depends on successful intensive hatchery rearing of larva and juveniles. For sole, larval rearing and weaning in captivity, the two main obstacles for a successful aquaculture rearing of this species, have been overcome successfully (Cañavate & Fernández‐Díaz 1999; Dinis et al 1999; Engrola, Conceição, Gavaia, Cancela & Dinis 2005; Ribeiro, Engrola & Dinis 2005; Engrola, Conceição, Dias, Pereira, Ribeiro & Dinis 2007). This species is now achieving good survival rates at early stages and good growth performance in intensive systems, with results similar to other marine fish already established in commercial aquaculture (Conceição et al 2007).…”