Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus

The objective of this study was to investigate the nutritional vulnerability of stage III juveniles of the freshwater crayfish Cherax quadricarinatus. The point-of-reserve-saturation (PRS50), the point-of-no-return (PNR50) and the compensatory growth capacity in intermittently fed individuals were d...

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Autores principales: Stumpf, L., Calvo, N.S., Pietrokovsky, S., López Greco, L.S.
Formato: JOUR
Materias:
Cherax quadricarinatus
Compensatory growth
Intermittent feeding
Juveniles
Point-of-no-return
Point-of-reserve-saturation
aquaculture production
bioenergetics
biological development
brood stock
compensation
crayfish
crustacean culture
food availability
food quality
freshwater ecosystem
growth rate
juvenile
molt
nutrient availability
survival
Astacoidea
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00448486_v304_n1-4_p34_Stumpf
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00448486_v304_n1-4_p34_Stumpf
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spelling todo:paper_00448486_v304_n1-4_p34_Stumpf2023-10-03T14:51:50Z Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus Stumpf, L. Calvo, N.S. Pietrokovsky, S. López Greco, L.S. Cherax quadricarinatus Compensatory growth Intermittent feeding Juveniles Point-of-no-return Point-of-reserve-saturation aquaculture production bioenergetics biological development brood stock compensation crayfish crustacean culture food availability food quality freshwater ecosystem growth rate juvenile molt nutrient availability survival Astacoidea Cherax quadricarinatus The objective of this study was to investigate the nutritional vulnerability of stage III juveniles of the freshwater crayfish Cherax quadricarinatus. The point-of-reserve-saturation (PRS50), the point-of-no-return (PNR50) and the compensatory growth capacity in intermittently fed individuals were determined. The juveniles were subjected to different feeding protocols for the PRS-PNR experiment and the intermittent feeding experiment. Fifty percent of the juveniles were able to successfully molt to the following stage (PRS50) after 3.53 feeding days and failed to molt to the following stage (PNR50) after 4.28 starvation days. In the intermittent feeding experiment, stage III juveniles achieved similar growth and survival compared to those kept under the continuous feeding regimen. Full compensatory growth occurred during the restriction period in the initially fed group and during the refeeding period in the initially starved group. This is the first study on PRS, PNR and compensatory growth in a subtropical freshwater crayfish. Moreover, it shows that stage III juveniles are unable to molt to the following stage without feeding, requiring at least two feeding days to molt and survive. Feeding seems to be necessary at the beginning of stage III, when energy reserves are probably accumulated. On the other hand, the capacity to fully compensate may lead to a reduction in the amount of food supplied, thereby diminishing the costs of production and improving water quality. In conclusion, the high level of compensatory growth capacity, together with the values of PNR50 and PRS50 obtained in this study, could serve as useful indices for assessing brood quality and food quality in aquaculture. © 2010 Elsevier B.V. All rights reserved. Fil:Calvo, N.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pietrokovsky, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:López Greco, L.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00448486_v304_n1-4_p34_Stumpf
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cherax quadricarinatus
Compensatory growth
Intermittent feeding
Juveniles
Point-of-no-return
Point-of-reserve-saturation
aquaculture production
bioenergetics
biological development
brood stock
compensation
crayfish
crustacean culture
food availability
food quality
freshwater ecosystem
growth rate
juvenile
molt
nutrient availability
survival
Astacoidea
Cherax quadricarinatus
spellingShingle Cherax quadricarinatus
Compensatory growth
Intermittent feeding
Juveniles
Point-of-no-return
Point-of-reserve-saturation
aquaculture production
bioenergetics
biological development
brood stock
compensation
crayfish
crustacean culture
food availability
food quality
freshwater ecosystem
growth rate
juvenile
molt
nutrient availability
survival
Astacoidea
Cherax quadricarinatus
Stumpf, L.
Calvo, N.S.
Pietrokovsky, S.
López Greco, L.S.
Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus
topic_facet Cherax quadricarinatus
Compensatory growth
Intermittent feeding
Juveniles
Point-of-no-return
Point-of-reserve-saturation
aquaculture production
bioenergetics
biological development
brood stock
compensation
crayfish
crustacean culture
food availability
food quality
freshwater ecosystem
growth rate
juvenile
molt
nutrient availability
survival
Astacoidea
Cherax quadricarinatus
description The objective of this study was to investigate the nutritional vulnerability of stage III juveniles of the freshwater crayfish Cherax quadricarinatus. The point-of-reserve-saturation (PRS50), the point-of-no-return (PNR50) and the compensatory growth capacity in intermittently fed individuals were determined. The juveniles were subjected to different feeding protocols for the PRS-PNR experiment and the intermittent feeding experiment. Fifty percent of the juveniles were able to successfully molt to the following stage (PRS50) after 3.53 feeding days and failed to molt to the following stage (PNR50) after 4.28 starvation days. In the intermittent feeding experiment, stage III juveniles achieved similar growth and survival compared to those kept under the continuous feeding regimen. Full compensatory growth occurred during the restriction period in the initially fed group and during the refeeding period in the initially starved group. This is the first study on PRS, PNR and compensatory growth in a subtropical freshwater crayfish. Moreover, it shows that stage III juveniles are unable to molt to the following stage without feeding, requiring at least two feeding days to molt and survive. Feeding seems to be necessary at the beginning of stage III, when energy reserves are probably accumulated. On the other hand, the capacity to fully compensate may lead to a reduction in the amount of food supplied, thereby diminishing the costs of production and improving water quality. In conclusion, the high level of compensatory growth capacity, together with the values of PNR50 and PRS50 obtained in this study, could serve as useful indices for assessing brood quality and food quality in aquaculture. © 2010 Elsevier B.V. All rights reserved.
format JOUR
author Stumpf, L.
Calvo, N.S.
Pietrokovsky, S.
López Greco, L.S.
author_facet Stumpf, L.
Calvo, N.S.
Pietrokovsky, S.
López Greco, L.S.
author_sort Stumpf, L.
title Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus
title_short Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus
title_full Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus
title_fullStr Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus
title_full_unstemmed Nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish Cherax quadricarinatus
title_sort nutritional vulnerability and compensatory growth in early juveniles of the "red claw" crayfish cherax quadricarinatus
url http://hdl.handle.net/20.500.12110/paper_00448486_v304_n1-4_p34_Stumpf
work_keys_str_mv AT stumpfl nutritionalvulnerabilityandcompensatorygrowthinearlyjuvenilesoftheredclawcrayfishcheraxquadricarinatus
AT calvons nutritionalvulnerabilityandcompensatorygrowthinearlyjuvenilesoftheredclawcrayfishcheraxquadricarinatus
AT pietrokovskys nutritionalvulnerabilityandcompensatorygrowthinearlyjuvenilesoftheredclawcrayfishcheraxquadricarinatus
AT lopezgrecols nutritionalvulnerabilityandcompensatorygrowthinearlyjuvenilesoftheredclawcrayfishcheraxquadricarinatus
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