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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

Histological sections of the hepatopancreas in the redclaw crayfish C. quadricarinatus at the end of 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, v during the first 45 days of the experimental period, and fed daily from day 45 to day 90). B: B-cell; F: L: lumen; Lv: large vacuole from B-cell; R: R-cell; Sv: Small vacuole from R-cell; T: tubular structure.
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pone.0139372.g009: Histological sections of the hepatopancreas in the redclaw crayfish C. quadricarinatus at the end of 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, v during the first 45 days of the experimental period, and fed daily from day 45 to day 90). B: B-cell; F: L: lumen; Lv: large vacuole from B-cell; R: R-cell; Sv: Small vacuole from R-cell; T: tubular structure.

Mentions: The hepatopancreas was characterized based on recent descriptions of this digestive gland for this species [24]. The structure of the hepatopancreas of C. quadricarinatus resembles that of other decapod crustaceans and it is composed of numerous blinded tubules with four main cell types, i.e., E-, F-, B- and R-cells [24,26] (Fig 8). Histological observation of the hepatopancreas revealed no structural differences between the CF and DF regimens at the end of restriction and recovery periods, when the juveniles were exposed at 23°C and 27°C (Figs 8A–8D and 9A–9D). However, at the end of restriction period in juveniles of DF regime at 31°C was observed a hypertrophy of B- cells (Fig 8E), and in juveniles of CF regime at 31°C was observed a greater inter-tubular space (Fig 8F), but these abnormalities disappeared at the end of recovery period (Fig 9E and 9F).


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)

Histological sections of the hepatopancreas in the redclaw crayfish C. quadricarinatus at the end of 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, v during the first 45 days of the experimental period, and fed daily from day 45 to day 90). B: B-cell; F: L: lumen; Lv: large vacuole from B-cell; R: R-cell; Sv: Small vacuole from R-cell; T: tubular structure.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0139372.g009: Histological sections of the hepatopancreas in the redclaw crayfish C. quadricarinatus at the end of 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, v during the first 45 days of the experimental period, and fed daily from day 45 to day 90). B: B-cell; F: L: lumen; Lv: large vacuole from B-cell; R: R-cell; Sv: Small vacuole from R-cell; T: tubular structure.
Mentions: The hepatopancreas was characterized based on recent descriptions of this digestive gland for this species [24]. The structure of the hepatopancreas of C. quadricarinatus resembles that of other decapod crustaceans and it is composed of numerous blinded tubules with four main cell types, i.e., E-, F-, B- and R-cells [24,26] (Fig 8). Histological observation of the hepatopancreas revealed no structural differences between the CF and DF regimens at the end of restriction and recovery periods, when the juveniles were exposed at 23°C and 27°C (Figs 8A–8D and 9A–9D). However, at the end of restriction period in juveniles of DF regime at 31°C was observed a hypertrophy of B- cells (Fig 8E), and in juveniles of CF regime at 31°C was observed a greater inter-tubular space (Fig 8F), but these abnormalities disappeared at the end of recovery period (Fig 9E and 9F).

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