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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

Growth of the redclaw crayfish C. quadricarinatus.(A) Body mass of the juveniles after the end of the restriction period and after the end of the recovery period. (B) Specific growth rate of the redclaw crayfish C. quadricarinatus after 45 days of daily feeding (recovery period). Temperature regimes: 23±1°C, 27±1°C and 31±1°C and feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation, intermittently during the first 45 days of the experimental period, and fed daily from day 45 to day 90). Letters “x,y,z” indicate significant differences among temperatures. Asterisk indicates significant differences between feeding regimes.
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pone.0139372.g002: Growth of the redclaw crayfish C. quadricarinatus.(A) Body mass of the juveniles after the end of the restriction period and after the end of the recovery period. (B) Specific growth rate of the redclaw crayfish C. quadricarinatus after 45 days of daily feeding (recovery period). Temperature regimes: 23±1°C, 27±1°C and 31±1°C and feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation, intermittently during the first 45 days of the experimental period, and fed daily from day 45 to day 90). Letters “x,y,z” indicate significant differences among temperatures. Asterisk indicates significant differences between feeding regimes.

Mentions: Growth performance of crayfish at the end of both periods is presented in Fig 2. At the end of restriction feeding period, body mass of juveniles was significantly affected by feeding regime (F1, 283 = 56.11; P< 0.001), and temperature (F2,283 = 51.01; P< 0.001) (Fig 2A). Body mass of juveniles in CF regime was lower than that of juveniles in DF regime and body mass of crayfish exposed to low and high temperatures was lower than that of crayfish exposed to optimum temperature. After a recovery period of 45 days, the effect of temperature on body mass persisted (F2,74 = 13.26;P< 0.001), in which the weight of juveniles exposed to 31±1°C was lower than that of juveniles exposed to 23±1°C and 27±1°C, whereas the body mass was not statistically different between feeding regimes (F1,74 = 1.73; P = 0.192) (Fig 2A).


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)

Growth of the redclaw crayfish C. quadricarinatus.(A) Body mass of the juveniles after the end of the restriction period and after the end of the recovery period. (B) Specific growth rate of the redclaw crayfish C. quadricarinatus after 45 days of daily feeding (recovery period). Temperature regimes: 23±1°C, 27±1°C and 31±1°C and feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation, intermittently during the first 45 days of the experimental period, and fed daily from day 45 to day 90). Letters “x,y,z” indicate significant differences among temperatures. Asterisk indicates significant differences between feeding regimes.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0139372.g002: Growth of the redclaw crayfish C. quadricarinatus.(A) Body mass of the juveniles after the end of the restriction period and after the end of the recovery period. (B) Specific growth rate of the redclaw crayfish C. quadricarinatus after 45 days of daily feeding (recovery period). Temperature regimes: 23±1°C, 27±1°C and 31±1°C and feeding regimes: DF (juveniles fed daily throughout the experimental period) and CF (juveniles fed for 4 days followed by 4 days of food deprivation, intermittently during the first 45 days of the experimental period, and fed daily from day 45 to day 90). Letters “x,y,z” indicate significant differences among temperatures. Asterisk indicates significant differences between feeding regimes.
Mentions: Growth performance of crayfish at the end of both periods is presented in Fig 2. At the end of restriction feeding period, body mass of juveniles was significantly affected by feeding regime (F1, 283 = 56.11; P< 0.001), and temperature (F2,283 = 51.01; P< 0.001) (Fig 2A). Body mass of juveniles in CF regime was lower than that of juveniles in DF regime and body mass of crayfish exposed to low and high temperatures was lower than that of crayfish exposed to optimum temperature. After a recovery period of 45 days, the effect of temperature on body mass persisted (F2,74 = 13.26;P< 0.001), in which the weight of juveniles exposed to 31±1°C was lower than that of juveniles exposed to 23±1°C and 27±1°C, whereas the body mass was not statistically different between feeding regimes (F1,74 = 1.73; P = 0.192) (Fig 2A).

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