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- W893043526 abstract "Compensatory growth (CG) refers to the ability of individuals to accelerategrowth rate following periods of nutritional deprivation. This study examined the use ofcyclical feeding regimes to elicit CG in two marine fishes with different life histories:black sea bass (Centropristis striata) and southern flounder (Paralichthys lethostigma).During Phase I, 60 juveniles of each species were divided equally into 3 cyclical feedingtreatments and one control group (unlimited ration). There also was a group control foreach species to test for any differences between the group held and the individually heldcontrols. Treatment groups were starved for either 2, 5 or 8 days, refed untilconsumption rates returned to control levels, and then starved again. During Phase I,treatments were examined for their ability to elicit CG after at least 3 feed/no feed cycles.During Phase II, deprived treatments were returned to unlimited ration and monitored foradditional compensation relative to controls. The duration of the experiments was 73days for black sea bass and 61 days for southern flounder. Analyses indicate thatcapacity for CG is minimal in both species. Following Phase I, controls were larger thandeprived treatments for both species, suggesting that cyclical feeding regimes did notelicit a strong compensatory response. Although cyclical feeding produced ahyperphagic response in both species, the duration of hyperphagia was short (~1-2 days)and insufficient to support CG. Furthermore, treatment groups did not increase growthefficiencies relative to controls during Phase I. During Phase II, D5 and D8 treatmentsdisplayed partial compensation as evidenced by increased weight-specific feeding rate(WSFR), growth rate (G) and gross growth efficiency (K1); however, control fishmaintained a distinct size advantage. Proximate composition analysis (non-polar lipids, protein, AFDW) reveal different patterns of energy allocation in these species, with theblack sea bass showing higher lipid content and lower water content compared to thesouthern flounder. Results are discussed in light of competing hypotheses regarding thefitness consequences of compensatory growth. Limited hyperphagic responses and lackof full compensation may be due to constraints on digestion rate, or decreased fitnessassociated with maximal growth rates." @default.
- W893043526 created "2016-06-24" @default.
- W893043526 creator A5021504339 @default.
- W893043526 date "2009-01-01" @default.
- W893043526 modified "2023-09-26" @default.
- W893043526 title "Evaluation of the capacity for compensatory growth in juvenile black sea bass (Centropristis striata) and southern flounder (Paralichthys lethostigma)" @default.
- W893043526 hasPublicationYear "2009" @default.
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