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Compensatory Growth in Juveniles of Freshwater Redclaw Crayfish Cherax quadricarinatus Reared at Three Different Temperatures: Hyperphagia and Food Efficiency as Primary Mechanisms.

Stumpf L, López Greco LS - PLoS ONE (2015)

Bottom Line: The previously restricted crayfish held at 23, 27, and 31 ± 1 ° C displayed complete body weight catch-up through compensatory growth following the restriction period with depressed growth.Hepatopancreatic lipids were used as a metabolic fuel and hepatosomatic index was reduced in the previously restricted crayfish, but recovery at the same level of unrestricted crayfish occurred after the shift to daily feeding.The highest temperature affected adversely growth, feed intake, food efficiency, and metabolism of crayfish, whereas the lowest temperature and feeding restriction induced a more efficient growth of the crayfish.

View Article: PubMed Central - PubMed

Affiliation: Biology of Reproduction and Growth in Crustaceans, Department of Biodiversity and Experimental Biology, FCEyN, University of Buenos Aires, Buenos Aires, Argentina; IBBEA, CONICET-UBA, Buenos Aires, Argentina.

ABSTRACT
Feeding restriction, as a trigger for compensatory growth, might be considered an alternative viable strategy for minimizing waste as well as production costs. The study assessed whether juvenile redclaw crayfish Cherax quadricarinatus (initial weight 0.99 ± 0.03 g) was able to compensate for feeding restriction at different temperatures (23 ± 1, 27 ± 1 and 31 ± 1 ° C). Hyperphagia, food utilization efficiency, energetic reserves, and hepatopancreas structure were analyzed. Three temperatures and two feeding regimes (DF-daily fed throughout the experiment and CF- 4 days food deprivation followed by 4 days of feeding, intermittently) were tested. The restriction period was from day 1 to 45, and the recovery period was from day 45 to 90. The previously restricted crayfish held at 23, 27, and 31 ± 1 ° C displayed complete body weight catch-up through compensatory growth following the restriction period with depressed growth. The mechanisms that might explain this response were higher feed intake (hyperphagia), and increased food utilization efficiency. Hepatopancreatic lipids were used as a metabolic fuel and hepatosomatic index was reduced in the previously restricted crayfish, but recovery at the same level of unrestricted crayfish occurred after the shift to daily feeding. The highest temperature affected adversely growth, feed intake, food efficiency, and metabolism of crayfish, whereas the lowest temperature and feeding restriction induced a more efficient growth of the crayfish.

No MeSH data available.


Related in: MedlinePlus

Feeding intake of the redclaw crayfish C. quadricarinatus during the recovery period.Temperature regimes: 23±1°C, 27±1°C and 31±1°C; feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation in cycles during the first 45 days of the experimental period, and fed daily from day 45 to day 90), and different time of the recovery period: days 45–60, days 60–75 and days 75–90. Letters “a,b,c,d” indicate significant differences interaction between feeding regime and time. Letters “x,y,z” indicate significant differences among temperatures.
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pone.0139372.g003: Feeding intake of the redclaw crayfish C. quadricarinatus during the recovery period.Temperature regimes: 23±1°C, 27±1°C and 31±1°C; feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation in cycles during the first 45 days of the experimental period, and fed daily from day 45 to day 90), and different time of the recovery period: days 45–60, days 60–75 and days 75–90. Letters “a,b,c,d” indicate significant differences interaction between feeding regime and time. Letters “x,y,z” indicate significant differences among temperatures.

Mentions: The feeding intake (in terms of % of body mass per day) during the recovery period was affected by interaction between feeding regime and time (F2, 148 = 3.61;P = 0.029) and by temperature (F2, 74 = 20.54; P< 0.001) (Fig 3). Hyperphagia was noticed in juveniles under CF regime at all times, and these juveniles consumed ~ 27%, 14% and 17% more food than those non-restricted in the first, second and third fortnight, respectively. On the other hand, juveniles exposed to a higher temperature had superior consumption, in proportion of their body, followed by optimum and low temperatures.


Compensatory Growth in Juveniles of Freshwater Redclaw Crayfish Cherax quadricarinatus Reared at Three Different Temperatures: Hyperphagia and Food Efficiency as Primary Mechanisms.

Stumpf L, López Greco LS - PLoS ONE (2015)

Feeding intake of the redclaw crayfish C. quadricarinatus during the recovery period.Temperature regimes: 23±1°C, 27±1°C and 31±1°C; feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation in cycles during the first 45 days of the experimental period, and fed daily from day 45 to day 90), and different time of the recovery period: days 45–60, days 60–75 and days 75–90. Letters “a,b,c,d” indicate significant differences interaction between feeding regime and time. Letters “x,y,z” indicate significant differences among temperatures.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4589333&req=5

pone.0139372.g003: Feeding intake of the redclaw crayfish C. quadricarinatus during the recovery period.Temperature regimes: 23±1°C, 27±1°C and 31±1°C; feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation in cycles during the first 45 days of the experimental period, and fed daily from day 45 to day 90), and different time of the recovery period: days 45–60, days 60–75 and days 75–90. Letters “a,b,c,d” indicate significant differences interaction between feeding regime and time. Letters “x,y,z” indicate significant differences among temperatures.
Mentions: The feeding intake (in terms of % of body mass per day) during the recovery period was affected by interaction between feeding regime and time (F2, 148 = 3.61;P = 0.029) and by temperature (F2, 74 = 20.54; P< 0.001) (Fig 3). Hyperphagia was noticed in juveniles under CF regime at all times, and these juveniles consumed ~ 27%, 14% and 17% more food than those non-restricted in the first, second and third fortnight, respectively. On the other hand, juveniles exposed to a higher temperature had superior consumption, in proportion of their body, followed by optimum and low temperatures.

Bottom Line: The previously restricted crayfish held at 23, 27, and 31 ± 1 ° C displayed complete body weight catch-up through compensatory growth following the restriction period with depressed growth.Hepatopancreatic lipids were used as a metabolic fuel and hepatosomatic index was reduced in the previously restricted crayfish, but recovery at the same level of unrestricted crayfish occurred after the shift to daily feeding.The highest temperature affected adversely growth, feed intake, food efficiency, and metabolism of crayfish, whereas the lowest temperature and feeding restriction induced a more efficient growth of the crayfish.

View Article: PubMed Central - PubMed

Affiliation: Biology of Reproduction and Growth in Crustaceans, Department of Biodiversity and Experimental Biology, FCEyN, University of Buenos Aires, Buenos Aires, Argentina; IBBEA, CONICET-UBA, Buenos Aires, Argentina.

ABSTRACT
Feeding restriction, as a trigger for compensatory growth, might be considered an alternative viable strategy for minimizing waste as well as production costs. The study assessed whether juvenile redclaw crayfish Cherax quadricarinatus (initial weight 0.99 ± 0.03 g) was able to compensate for feeding restriction at different temperatures (23 ± 1, 27 ± 1 and 31 ± 1 ° C). Hyperphagia, food utilization efficiency, energetic reserves, and hepatopancreas structure were analyzed. Three temperatures and two feeding regimes (DF-daily fed throughout the experiment and CF- 4 days food deprivation followed by 4 days of feeding, intermittently) were tested. The restriction period was from day 1 to 45, and the recovery period was from day 45 to 90. The previously restricted crayfish held at 23, 27, and 31 ± 1 ° C displayed complete body weight catch-up through compensatory growth following the restriction period with depressed growth. The mechanisms that might explain this response were higher feed intake (hyperphagia), and increased food utilization efficiency. Hepatopancreatic lipids were used as a metabolic fuel and hepatosomatic index was reduced in the previously restricted crayfish, but recovery at the same level of unrestricted crayfish occurred after the shift to daily feeding. The highest temperature affected adversely growth, feed intake, food efficiency, and metabolism of crayfish, whereas the lowest temperature and feeding restriction induced a more efficient growth of the crayfish.

No MeSH data available.


Related in: MedlinePlus