Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios)
There is a growing interest in the development of hapuku (Polyprion oxygeneios) for aquaculture in New Zealand and Australia. This is driven by the high value of this species prized for its excellent flesh quality, texture and its rapid growth capability. As a relatively new aquaculture candidate, l...
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ftdeakinunifig:oai:figshare.com:article/20895118 2023-05-15T15:27:50+02:00 Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios) Jared Tromp Paul Jones J E Symonds S P Walker Adam Pope S M J Pether Luis Afonso 2016-02-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30079936 https://figshare.com/articles/journal_contribution/Effects_of_commercial_diets_and_temperature_on_the_growth_performance_and_stress_response_of_hapuku_Polyprion_oxygeneios_/20895118 unknown http://hdl.handle.net/10536/DRO/DU:30079936 https://figshare.com/articles/journal_contribution/Effects_of_commercial_diets_and_temperature_on_the_growth_performance_and_stress_response_of_hapuku_Polyprion_oxygeneios_/20895118 All Rights Reserved Zoology Science & Technology Life Sciences & Biomedicine Fisheries Marine & Freshwater Biology Cortisol Diet Growth Polyprion oxygeneios Stress response GADUS-MORHUA L MELANOGRAMMUS-AEGLEFINUS L NEW-ZEALAND HAPUKU ATLANTIC COD FISH WATER TERM CONFINEMENT CONSUMPTION Text Journal contribution 2016 ftdeakinunifig 2022-11-17T21:08:12Z There is a growing interest in the development of hapuku (Polyprion oxygeneios) for aquaculture in New Zealand and Australia. This is driven by the high value of this species prized for its excellent flesh quality, texture and its rapid growth capability. As a relatively new aquaculture candidate, little is currently known about their thermal tolerance and stress response. Juveniles inhabit surface waters, have a high rate of growth and move into a demersal habitat at an age between 3 and 4 years, where water temperature is cooler (7-15. °C) and more stable. The sea surface temperature in New Zealand can reach 22. °C during the summer months in more northerly locations, and captive rearing has indicated that during periods of high temperature, growth is reduced and it is possible that the physiological response is compromised. We examined the effects of two rearing temperatures (18. °C and 22. °C) and three commercial diets on the growth of P. oxygeneios during a 14 week trial. At the end of this trial, fish were exposed to a crowding stressor, and their stress response (plasma cortisol, glucose and cholesterol levels) determined. In addition, we examined the temporal stress response of P. oxygeneios acclimated to 18. °C and 22. °C subjected to a single acute handling stress. Specific growth rate and condition factor significantly increased over time in fish reared at 18. °C, but not at 22. °C. Plasma cortisol levels in hapuku prior to and after application of the stressors were within the range observed in other teleost species and the magnitude of the cortisol response was higher in hapuku subjected to crowding than handling stress. In summary, the results indicated that rearing P. oxygeneios at temperatures of 22. °C compromised their growth and that all three diets tested promoted growth in hapuku reared at 18. °C but not at 22. °C.Statement of relevanceHapuku over 1 kg had better growth rates at 18. °C than 22. °C. Other Non-Article Part of Journal/Newspaper atlantic cod Gadus morhua DRO - Deakin Research Online New Zealand |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Zoology Science & Technology Life Sciences & Biomedicine Fisheries Marine & Freshwater Biology Cortisol Diet Growth Polyprion oxygeneios Stress response GADUS-MORHUA L MELANOGRAMMUS-AEGLEFINUS L NEW-ZEALAND HAPUKU ATLANTIC COD FISH WATER TERM CONFINEMENT CONSUMPTION |
spellingShingle |
Zoology Science & Technology Life Sciences & Biomedicine Fisheries Marine & Freshwater Biology Cortisol Diet Growth Polyprion oxygeneios Stress response GADUS-MORHUA L MELANOGRAMMUS-AEGLEFINUS L NEW-ZEALAND HAPUKU ATLANTIC COD FISH WATER TERM CONFINEMENT CONSUMPTION Jared Tromp Paul Jones J E Symonds S P Walker Adam Pope S M J Pether Luis Afonso Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios) |
topic_facet |
Zoology Science & Technology Life Sciences & Biomedicine Fisheries Marine & Freshwater Biology Cortisol Diet Growth Polyprion oxygeneios Stress response GADUS-MORHUA L MELANOGRAMMUS-AEGLEFINUS L NEW-ZEALAND HAPUKU ATLANTIC COD FISH WATER TERM CONFINEMENT CONSUMPTION |
description |
There is a growing interest in the development of hapuku (Polyprion oxygeneios) for aquaculture in New Zealand and Australia. This is driven by the high value of this species prized for its excellent flesh quality, texture and its rapid growth capability. As a relatively new aquaculture candidate, little is currently known about their thermal tolerance and stress response. Juveniles inhabit surface waters, have a high rate of growth and move into a demersal habitat at an age between 3 and 4 years, where water temperature is cooler (7-15. °C) and more stable. The sea surface temperature in New Zealand can reach 22. °C during the summer months in more northerly locations, and captive rearing has indicated that during periods of high temperature, growth is reduced and it is possible that the physiological response is compromised. We examined the effects of two rearing temperatures (18. °C and 22. °C) and three commercial diets on the growth of P. oxygeneios during a 14 week trial. At the end of this trial, fish were exposed to a crowding stressor, and their stress response (plasma cortisol, glucose and cholesterol levels) determined. In addition, we examined the temporal stress response of P. oxygeneios acclimated to 18. °C and 22. °C subjected to a single acute handling stress. Specific growth rate and condition factor significantly increased over time in fish reared at 18. °C, but not at 22. °C. Plasma cortisol levels in hapuku prior to and after application of the stressors were within the range observed in other teleost species and the magnitude of the cortisol response was higher in hapuku subjected to crowding than handling stress. In summary, the results indicated that rearing P. oxygeneios at temperatures of 22. °C compromised their growth and that all three diets tested promoted growth in hapuku reared at 18. °C but not at 22. °C.Statement of relevanceHapuku over 1 kg had better growth rates at 18. °C than 22. °C. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Jared Tromp Paul Jones J E Symonds S P Walker Adam Pope S M J Pether Luis Afonso |
author_facet |
Jared Tromp Paul Jones J E Symonds S P Walker Adam Pope S M J Pether Luis Afonso |
author_sort |
Jared Tromp |
title |
Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios) |
title_short |
Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios) |
title_full |
Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios) |
title_fullStr |
Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios) |
title_full_unstemmed |
Effects of commercial diets and temperature on the growth performance and stress response of hapuku (Polyprion oxygeneios) |
title_sort |
effects of commercial diets and temperature on the growth performance and stress response of hapuku (polyprion oxygeneios) |
publishDate |
2016 |
url |
http://hdl.handle.net/10536/DRO/DU:30079936 https://figshare.com/articles/journal_contribution/Effects_of_commercial_diets_and_temperature_on_the_growth_performance_and_stress_response_of_hapuku_Polyprion_oxygeneios_/20895118 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30079936 https://figshare.com/articles/journal_contribution/Effects_of_commercial_diets_and_temperature_on_the_growth_performance_and_stress_response_of_hapuku_Polyprion_oxygeneios_/20895118 |
op_rights |
All Rights Reserved |
_version_ |
1766358245928075264 |