Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival
2021 Summer. Includes bibliographical references. Burbot, Lota lota are a candidate species for commercial aquaculture because of their palatability and optimal growth at temperatures similar to those used in freshwater trout aquaculture. However, data on burbot environmental tolerances and requirem...
Main Author: | |
---|---|
Other Authors: | , , |
Format: | Text |
Language: | English |
Published: |
Colorado State University. Libraries
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/10217/233702 |
id |
ftcolostateunidc:oai:mountainscholar.org:10217/233702 |
---|---|
record_format |
openpolar |
spelling |
ftcolostateunidc:oai:mountainscholar.org:10217/233702 2023-06-11T04:10:43+02:00 Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival Vaage, Ben Myrick, Christopher Angeloni, Lisa Clements, Will 2021-09-06T10:24:35Z born digital masters theses application/pdf https://hdl.handle.net/10217/233702 English eng eng Colorado State University. Libraries 2020- CSU Theses and Dissertations Vaage_colostate_0053N_16650.pdf https://hdl.handle.net/10217/233702 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. burbot water quality fisheries aquaculture Text 2021 ftcolostateunidc 2023-05-04T17:38:59Z 2021 Summer. Includes bibliographical references. Burbot, Lota lota are a candidate species for commercial aquaculture because of their palatability and optimal growth at temperatures similar to those used in freshwater trout aquaculture. However, data on burbot environmental tolerances and requirements are sparse, especially with reference to water quality parameters relevant to aquaculture, such as un-ionized ammonia (UIA) and dissolved oxygen concentrations. First, we used a two-phased approach to evaluate the effects of un-ionized ammonia on the growth and survival of burbot. We measured the acute toxicity of ammonia to juvenile burbot (mean SL: 144 ± 6 mm; mean wet weight: 27.3 ± 3.4 g) and calculated a 96-hr LC50 of 0.58 mg·L-1 UIA. We then measured the 60-d growth, food consumption rate, and performance of burbot (mean initial SL: 190 ± 6.9 mm; mean initial weight: 67.0 ± 4.5 g) reared in 0.00, 0.03, 0.06, 0.12, or 0.19 mg·L-1 UIA using a 20-tank flow-through system under optimal temperature (14.7°C) and dissolved oxygen (DO > 80% saturation) conditions. Elevated ammonia concentration significantly reduced daily food consumption and subsequent growth. Fish exposed to 0.03 and 0.06 mg·L-1 UIA showed temporal acclimation to UIA, achieving food consumption and growth rates on par with control fish after 30 days of exposure. The estimated effective UIA concentrations for 10 and 20 percent reductions in growth (EC10 and EC20) based on our data are: EC10 = 0.03 ± 0.006 mg·L-1 and EC20 = 0.050 ± 0.004 mg·L-1. We recommend rearing burbot under conditions that keep UIA levels ≤ 0.03 mg·L-1 based on our finding that above 0.03 mg·L-1 cause measurable reductions in growth rate. Following the ammonia studies, we exposed juvenile burbot (19.5 ± 2.2 g) to five dissolved oxygen concentrations (5.0, 5.8, 6.6, 7.4, and 8.3 (control) mg·L-1) for 9 weeks at 15°C. Variability was high in all treatments, and food consumption and growth rates did not differ among DO levels, although fish at 8.3 mg·L-1 grew ca. 29% ... Text Burbot Lota lota lota Digital Collections of Colorado (Colorado State University) |
institution |
Open Polar |
collection |
Digital Collections of Colorado (Colorado State University) |
op_collection_id |
ftcolostateunidc |
language |
English |
topic |
burbot water quality fisheries aquaculture |
spellingShingle |
burbot water quality fisheries aquaculture Vaage, Ben Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival |
topic_facet |
burbot water quality fisheries aquaculture |
description |
2021 Summer. Includes bibliographical references. Burbot, Lota lota are a candidate species for commercial aquaculture because of their palatability and optimal growth at temperatures similar to those used in freshwater trout aquaculture. However, data on burbot environmental tolerances and requirements are sparse, especially with reference to water quality parameters relevant to aquaculture, such as un-ionized ammonia (UIA) and dissolved oxygen concentrations. First, we used a two-phased approach to evaluate the effects of un-ionized ammonia on the growth and survival of burbot. We measured the acute toxicity of ammonia to juvenile burbot (mean SL: 144 ± 6 mm; mean wet weight: 27.3 ± 3.4 g) and calculated a 96-hr LC50 of 0.58 mg·L-1 UIA. We then measured the 60-d growth, food consumption rate, and performance of burbot (mean initial SL: 190 ± 6.9 mm; mean initial weight: 67.0 ± 4.5 g) reared in 0.00, 0.03, 0.06, 0.12, or 0.19 mg·L-1 UIA using a 20-tank flow-through system under optimal temperature (14.7°C) and dissolved oxygen (DO > 80% saturation) conditions. Elevated ammonia concentration significantly reduced daily food consumption and subsequent growth. Fish exposed to 0.03 and 0.06 mg·L-1 UIA showed temporal acclimation to UIA, achieving food consumption and growth rates on par with control fish after 30 days of exposure. The estimated effective UIA concentrations for 10 and 20 percent reductions in growth (EC10 and EC20) based on our data are: EC10 = 0.03 ± 0.006 mg·L-1 and EC20 = 0.050 ± 0.004 mg·L-1. We recommend rearing burbot under conditions that keep UIA levels ≤ 0.03 mg·L-1 based on our finding that above 0.03 mg·L-1 cause measurable reductions in growth rate. Following the ammonia studies, we exposed juvenile burbot (19.5 ± 2.2 g) to five dissolved oxygen concentrations (5.0, 5.8, 6.6, 7.4, and 8.3 (control) mg·L-1) for 9 weeks at 15°C. Variability was high in all treatments, and food consumption and growth rates did not differ among DO levels, although fish at 8.3 mg·L-1 grew ca. 29% ... |
author2 |
Myrick, Christopher Angeloni, Lisa Clements, Will |
format |
Text |
author |
Vaage, Ben |
author_facet |
Vaage, Ben |
author_sort |
Vaage, Ben |
title |
Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival |
title_short |
Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival |
title_full |
Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival |
title_fullStr |
Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival |
title_full_unstemmed |
Measuring the effects of ammonia and dissolved oxygen on juvenile burbot (Lota lota) growth and survival |
title_sort |
measuring the effects of ammonia and dissolved oxygen on juvenile burbot (lota lota) growth and survival |
publisher |
Colorado State University. Libraries |
publishDate |
2021 |
url |
https://hdl.handle.net/10217/233702 |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_relation |
2020- CSU Theses and Dissertations Vaage_colostate_0053N_16650.pdf https://hdl.handle.net/10217/233702 |
op_rights |
Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. |
_version_ |
1768385341958389760 |