Feeding regimes affected the circadian rhythms of pancreatic digestive enzymes and somatic growth in flathead grey mullet (Mugil cephalus) fry
| Autor: | Mikhail M. Solovyev, E. Gisbert |
|---|---|
| Přispěvatelé: | Producció Animal, Aqüicultura |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physiology
Fisheries Biochemistry режим кормления Eating 03 medical and health sciences Animal science Nutrient Animals Biomass Circadian rhythm лобан Pancreas Molecular Biology 030304 developmental biology chemistry.chemical_classification 0303 health sciences Meal biology Mugil пищеварительные ферменты поджелудочной железы digestive oral and skin physiology Feeding Behavior 04 agricultural and veterinary sciences циркадный ритм biology.organism_classification Animal Feed Smegmamorpha Circadian Rhythm Enzyme chemistry Spain Digestive enzyme 040102 fisheries biology.protein 0401 agriculture forestry and fisheries серые кефали Animal Nutritional Physiological Phenomena Digestion Flathead grey mullet |
| Zdroj: | Comparative biochemistry and physiology. Part A: Molecular & integrative physiology. 2022. Vol. 264. P. 111116 (1-10) IRTA Pubpro. Open Digital Archive Institut de Recerca i Tecnologia Agroalimentàries (IRTA) |
| Popis: | The effect of different feeding regimes on the circadian rhythms of pancreatic digestive enzyme activities was evaluated in Mugil cephalus fry weighting 0.34 ± 0.01 g. Feeding regimes (feeding ration = 3% stocked biomass) differed on the number of meals offered per day: one, two and ten meals per day (R1, R2 and R3, respectively). The number of meals per day affected somatic growth; in particular, fry from the R3 group (0.80 ± 0.01 g) grew better than their congeners from R2 (0.70 ± 0.01 g) and R1 (0.63 ± 0.01 g) groups (P < 0.05). Feeding behaviour was modulated by the feeding regime, being the maximal gut fullness values found just after meal distribution in R1 and R2 groups, whereas this trend was not observed when feed was offered continuously during light hours (R3). Fry from R1 and R2 groups showed hyperphagia as they tended to store in their gut as much as possible feed particles to be later digested due to the limited daily meals. This strategy negatively affected feed digestion due to inappropriate enzyme to substrate ratio, changes in digestive enzyme activities and chyme transit times, which ultimately impaired growth performance. Enzyme activities were modulated by the number of meals, the more frequent the meals offered, the lower enzyme activities, supporting the hypothesis that digestive function is adapted to obtain a maximum benefit of the ingested nutrients. Present results showed that feeding grey mullet fry continuously during day light hours optimized feed digestion and promoted fry growth. info:eu-repo/semantics/acceptedVersion |
| Databáze: | OpenAIRE |
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