The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani
Captive breeding of marine ornamental fish is considered as a sustainable alternative to the current practice of fishing the wild stocks to supply the marine aquarium trade. However, efficient larviculture remains the biggest bottleneck, as many marine ornamentals suffered total mortality or only ha...
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Online Access: | https://researchonline.jcu.edu.au/69063/1/1-s2.0-S0044848621006712-main.pdf |
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ftjamescook:oai:researchonline.jcu.edu.au:69063 2024-02-11T10:09:30+01:00 The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani Chen, Jun Yu Zeng, Chaoshu 2021 application/pdf https://researchonline.jcu.edu.au/69063/1/1-s2.0-S0044848621006712-main.pdf unknown Elsevier https://doi.org/10.1016/j.aquaculture.2021.737008 https://researchonline.jcu.edu.au/69063/ https://researchonline.jcu.edu.au/69063/1/1-s2.0-S0044848621006712-main.pdf Chen, Jun Yu, and Zeng, Chaoshu (2021) The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani. Aquaculture, 543. 737008. restricted Article PeerReviewed 2021 ftjamescook https://doi.org/10.1016/j.aquaculture.2021.737008 2024-01-22T23:48:37Z Captive breeding of marine ornamental fish is considered as a sustainable alternative to the current practice of fishing the wild stocks to supply the marine aquarium trade. However, efficient larviculture remains the biggest bottleneck, as many marine ornamentals suffered total mortality or only have extremely low survival at early larval stage. This study investigated the optimal conditions for the rearing of early larvae of a valuable ornamental fish, the orchid dottyback Pseudochromis fridmani, in terms of density and combination of live prey, as well as the application of the “greenwater” technique. In the first experiment, larvae were reared in clearwater and fed rotifers at 2, 5, 15, and 40 mL−1. Although there was no significant difference in larval survival among treatments on 8 days post-hatching (DPH), the larvae fed higher rotifer densities (15 and 40 rotifers mL−1) had significantly better growth. In the second experiment, by 8 DPH, a significant interaction between rearing condition (clearwater vs. greenwater) and live prey combination (rotifers only vs co-feed rotifers and copepods) on larval survival was detected, and the mean survival of larvae co-fed rotifers and copepods in clearwater (18%) was significantly lower than the other treatments (45–64%). Moreover, larvae reared in greenwater, or co-fed rotifers and copepods, grew significantly larger than those reared in clearwater, or fed rotifers only, respectively. In the third experiment, the larval survival was higher cell density of Nannochloropsis paste (NAN) used to make greenwater (0–3.40 × 106 NAN cells mL−1). The larval survival of the highest algae density treatment was the highest on 8 DPH (72 ± 8%), and it was significantly higher than those reared in the treatments of 1.13 × 106 or 0 NAN cells mL−1, but not significantly different from that of 2.27 × 106 cells mL−1 treatment. Overall, the results of this study suggest that co-feeding early P. fridmani larvae with rotifers and copepods, with the complementary use of greenwater ... Article in Journal/Newspaper Copepods Rotifer James Cook University, Australia: ResearchOnline@JCU Aquaculture 543 737008 |
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James Cook University, Australia: ResearchOnline@JCU |
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ftjamescook |
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unknown |
description |
Captive breeding of marine ornamental fish is considered as a sustainable alternative to the current practice of fishing the wild stocks to supply the marine aquarium trade. However, efficient larviculture remains the biggest bottleneck, as many marine ornamentals suffered total mortality or only have extremely low survival at early larval stage. This study investigated the optimal conditions for the rearing of early larvae of a valuable ornamental fish, the orchid dottyback Pseudochromis fridmani, in terms of density and combination of live prey, as well as the application of the “greenwater” technique. In the first experiment, larvae were reared in clearwater and fed rotifers at 2, 5, 15, and 40 mL−1. Although there was no significant difference in larval survival among treatments on 8 days post-hatching (DPH), the larvae fed higher rotifer densities (15 and 40 rotifers mL−1) had significantly better growth. In the second experiment, by 8 DPH, a significant interaction between rearing condition (clearwater vs. greenwater) and live prey combination (rotifers only vs co-feed rotifers and copepods) on larval survival was detected, and the mean survival of larvae co-fed rotifers and copepods in clearwater (18%) was significantly lower than the other treatments (45–64%). Moreover, larvae reared in greenwater, or co-fed rotifers and copepods, grew significantly larger than those reared in clearwater, or fed rotifers only, respectively. In the third experiment, the larval survival was higher cell density of Nannochloropsis paste (NAN) used to make greenwater (0–3.40 × 106 NAN cells mL−1). The larval survival of the highest algae density treatment was the highest on 8 DPH (72 ± 8%), and it was significantly higher than those reared in the treatments of 1.13 × 106 or 0 NAN cells mL−1, but not significantly different from that of 2.27 × 106 cells mL−1 treatment. Overall, the results of this study suggest that co-feeding early P. fridmani larvae with rotifers and copepods, with the complementary use of greenwater ... |
format |
Article in Journal/Newspaper |
author |
Chen, Jun Yu Zeng, Chaoshu |
spellingShingle |
Chen, Jun Yu Zeng, Chaoshu The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani |
author_facet |
Chen, Jun Yu Zeng, Chaoshu |
author_sort |
Chen, Jun Yu |
title |
The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani |
title_short |
The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani |
title_full |
The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani |
title_fullStr |
The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani |
title_full_unstemmed |
The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani |
title_sort |
effects of live prey and greenwater on the early larval rearing of orchid dottyback pseudochromis fridmani |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://researchonline.jcu.edu.au/69063/1/1-s2.0-S0044848621006712-main.pdf |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_relation |
https://doi.org/10.1016/j.aquaculture.2021.737008 https://researchonline.jcu.edu.au/69063/ https://researchonline.jcu.edu.au/69063/1/1-s2.0-S0044848621006712-main.pdf Chen, Jun Yu, and Zeng, Chaoshu (2021) The effects of live prey and greenwater on the early larval rearing of orchid dottyback Pseudochromis fridmani. Aquaculture, 543. 737008. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1016/j.aquaculture.2021.737008 |
container_title |
Aquaculture |
container_volume |
543 |
container_start_page |
737008 |
_version_ |
1790609424165896192 |