Modelling of sulphur amino acid requirements and nitrogen endogenous losses in kittens
| Autor: | Leonir Bueno Ribeiro, Aline Terumi Uemoto, Mariana Regina Lingiardi Barion, Ricardo Souza Vasconcellos, Mônica Estela Zambon Merenda, Mateus Pereira dos Santos, Joyce Sato, Juliano Cesar de Paula Dorigam, Aulus Cavalieri Carciofi |
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| Přispěvatelé: | State University of Maringá, Veterinary Physician, Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2020 |
| Předmět: |
Male
0301 basic medicine Nitrogen balance genetic structures Nitrogen Cystine chemistry.chemical_element Endogeny Sulphur amino acid nitrogen balance 03 medical and health sciences chemistry.chemical_compound Methionine Göttingen method Animals Food science requirements cystine methionine 030109 nutrition & dietetics CATS General Veterinary Chemistry cats 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine Animal Feed 040201 dairy & animal science Diet kittens Dietary Supplements Cats Animal Nutritional Physiological Phenomena Female Animal Science and Zoology |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1477-2817 1745-039X |
| Popis: | Made available in DSpace on 2020-12-12T02:48:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01 The objective of this study was to estimate the sulphur amino acid (methionine + cystine) requirements and nitrogen endogenous losses in kittens aged 150 to 240 d. Thirty-six cats were distributed in six treatments (six cats per treatment) consisting of different concentrations of methionine + cystine (M + C): T1, 6.5 g/kg; T2, 8.8 g/kg; T3, 11.3 g/kg; T4, 13.6 g/kg; T5, 16.0 g/kg; and control, 6.5 g/kg. Diets were formulated by serial dilution of T5 (a diet relatively deficient in M + C but containing high protein concentrations) with a minimal nitrogen diet (MND). Thus, crude protein and amino acid concentrations in diets T1–T5 decreased by the same factor. The control diet was the T1 diet supplemented with adequate concentrations of M + C (6.5 g/kg; 8.8 g/kg; 11.3 g/kg; 13.6 g/kg and 16.0 g/kg). All diets were based on ingredients commonly used in extruded cat diets. Digestibility assays were performed for the determination of nitrogen balance. Nitrogen intake (NI) and nitrogen excretion (NEX) results data were fitted with an exponential equation to estimate nitrogen maintenance requirement (NMR), theoretical maximum for daily nitrogen retention (NRmaxT), and protein quality (b). M + C requirements were calculated from the limiting amino acid intake (LAAI) equation assuming a nitrogen retention of 45 to 65% NRmaxT. The NMR of kittens aged 150, 195, and 240 d was estimated at 595, 559, and 455 mg/kg body weight (BW)0.67 per day, respectively, and M + C requirements were estimated at 517, 664, and 301 mg/kg BW0.67 per day, respectively. Department of Animal Science State University of Maringá Veterinary Physician Department of Clinical and Veterinary Surgery School of Agricultural and Veterinarian Science São Paulo State University (UNESP Department of Clinical and Veterinary Surgery School of Agricultural and Veterinarian Science São Paulo State University (UNESP |
| Databáze: | OpenAIRE |
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