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Related Experiment Video

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Regular Care and Maintenance of a Zebrafish Danio rerio Laboratory: An Introduction
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An Optimized Zebrafish Nursery Feeding Regimen Improves Growth Rates and Labor Costs.

Toi A Collins1, Shelby Cabrera1, Emily Teets2

  • 1University Laboratory Animal Resources, Ohio State University, Columbus, Ohio, USA.

Zebrafish
|September 20, 2021
PubMed
Summary

Feeding larval zebrafish Gemma Micro 75 pelleted diet (PD) or continuous live rotifers (CL) improved growth compared to bolus live feeding (BL). The pelleted diet (PD) also reduced costs and labor for zebrafish nursery care.

Keywords:
feedingnurseryzebrafish

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Area of Science:

  • Aquatic animal nutrition
  • Zebrafish husbandry
  • Developmental biology

Background:

  • Establishing optimal feeding strategies for larval zebrafish (Danio rerio) is crucial for maximizing growth, survival, and reproductive success.
  • Current methods often involve live diets, which can be labor-intensive and costly.

Purpose of the Study:

  • To evaluate the impact of different feeding regimens on larval zebrafish growth, body morphology, and reproductive parameters.
  • To compare the economic and labor costs associated with pelleted versus live diets for zebrafish.

Main Methods:

  • Larval zebrafish were fed Gemma Micro 75 pelleted diet (PD), continuous live rotifers (CL), or bolus live rotifers (BL) starting at 9 days postfertilization.
  • Growth, body depth, weight, fecundity, and sex ratios were assessed at 4-5 weeks postfertilization.
  • Equipment, consumable, and labor costs for each feeding regimen were quantified.

Main Results:

  • Zebrafish fed the pelleted diet (PD) and continuously fed live rotifers (CL) were significantly longer than those fed bolus live rotifers (BL).
  • The PD group exhibited greater body depth compared to both live diet groups.
  • No significant differences in weight, fecundity, or sex ratios were observed across all groups.
  • The pelleted diet (PD) regimen demonstrated superior cost-effectiveness and reduced labor requirements compared to live diet regimens.

Conclusions:

  • Providing a nutrient-dense pelleted diet to larval and juvenile zebrafish effectively enhances early growth.
  • Pelleted diets offer a more cost-effective and labor-efficient alternative for zebrafish nursery care compared to live diets.
  • All evaluated feeding methods support the development of a viable breeding stock of zebrafish.