Effect of food shortage on growth, energetic reserves mobilization, and water quality in juveniles of the redclaw crayfish, Cherax quadricarinatus, reared in groups
| Autor: | Fernando Castillo Díaz, Liane Stumpf, Laura S. López Greco, Veronica Elizabeth Viau, Wagner Cotroni Valenti |
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| Rok vydání: | 2014 |
| Předmět: |
Protein efficiency ratio
Glycogen biology cyclic feeding Ecology Otras Ciencias Biológicas Aquatic Science biology.organism_classification Crayfish Feed conversion ratio Ciencias Biológicas chemistry.chemical_compound energetic reserves Animal science chemistry Cherax quadricarinatus hepatopancreas structure Compensatory growth (organism) Hepatopancreas Water quality CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Journal of Crustacean Biology. 34:639-646 |
| ISSN: | 1937-240X 0278-0372 |
| Popis: | The aim of this study is to analyze the impact of food shortage on growth performance, by means 24 of energetic reserves (proteins, glycogen and lipids) mobilization and hepatopancreas cells 25 analysis in C. quadricarinatus juveniles maintained in groups, as well as the effect on culture 26 water quality. Two experiments were performed, each of them with two feeding regimes during 27 45 days. The Control feeding regime, in which crayfish were fed daily (once a day) throughout 28 the experimental period (DF), and the Cyclic feeding regime, in which juveniles were fed for 2 or 29 4 days (once a day) followed by 2 or 4 days of food deprivation (2F/2D and 4F/4D, respectively) 30 in repeated cycles. Cyclic feeding influenced growth, biochemical composition from 31 hepatopancreas and muscle, and water quality. Juveniles cyclically fed were unable to maintain a 32 normal growth trajectory during 45 days. Apparent feed conversion ratio, apparent protein 33 efficiency ratio, hepatosomatic index and relative pleon mass were similar in cyclic and daily fed 34 animals and no structural damage was found in the hepatopancreas of juveniles subjected to 35 cyclic feeding. The novelty of this study was the significant accumulation of proteins in pleonal 36 muscle in both cyclic feeding regimes (~18%) suggesting that the storage of this constitutive 37 material during food shortage may be an adaptation for a compensatory growth when food 38 becomes abundant again. The cyclic feeding regimes had a positive effect on water quality 39 decreasing inorganic nitrogen concentration. This was due to the reduction in the amount of 40 animal excretes and feces in the group that received ~50% less feed. Additionally, water pH was 41 higher in cyclic feeding tanks, as a result of lower organic matter decomposition and consequent 42 release of CO2. Accordingly, total ammonia in the water was significantly lower for the cyclic 43 feeding regimes compared to their respective controls. This study suggests that the protocol of 44 cyclic feeding could be applied at least 45 days in 1 g juveniles maintained in group conditions, 45 3 without affecting the energetic reserves and hepatopancreas structure, emphasizing the high 46 tolerance of this species to food restriction. Fil: Stumpf, Liane. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Biología de la Reproducción y Crecimiento de Crustáceos Decápodos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina Fil: Castillo Díaz, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Biología de la Reproducción y Crecimiento de Crustáceos Decápodos; Argentina Fil: Viau, Veronica Elizabeth. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Biología de la Reproducción y Crecimiento de Crustáceos Decápodos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina Fil: Valenti, Wagner C.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil Fil: Lopez, Laura Susana. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental. Laboratorio de Biología de la Reproducción y Crecimiento de Crustáceos Decápodos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina |
| Databáze: | OpenAIRE |
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