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Titolo:
Energetics and litter size variation in domestic dog Canis familiaris breeds of two sizes
Autore:
Scantlebury, M; Butterwick, R; Speakman, JR;
Indirizzi:
Univ Aberdeen, Dept Zool, Aberdeen Ctr Energy Regulat & Obes, Aberdeen AB24 2TZ, Scotland Univ Aberdeen Aberdeen Scotland AB24 2TZ es, Aberdeen AB24 2TZ, Scotland Waltham Ctr Pet Nutr, Leicester LE14 4RT, Leics, England Waltham Ctr Pet Nutr Leicester Leics England LE14 4RT 4RT, Leics, England
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR AND INTEGRATIVE PHYSIOLOGY
fascicolo: 4, volume: 129, anno: 2001,
pagine: 919 - 931
SICI:
1095-6433(200107)129:4<919:EALSVI>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUSTAINED METABOLIC-RATE; DOUBLY LABELED WATER; ENERGY-EXPENDITURE; LACTATING MICE; CO2 PRODUCTION; MAMMALS; LIMITS; BUDGETS; HUMANS; BIRDS;
Keywords:
domestic dog; doubly labelled water; isotope; energetics; lactation; litter size; offspring; metabolisable energy intake; resting metabolic rate; body mass;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
62
Recensione:
Indirizzi per estratti:
Indirizzo: Scantlebury, M Univ Bristol, Sch Biol Sci, Mammal Res Unit, Bristol BS8 1UG, Avon, England Univ Bristol Bristol Avon England BS8 1UG G, Avon, England
Citazione:
M. Scantlebury et al., "Energetics and litter size variation in domestic dog Canis familiaris breeds of two sizes", COMP BIOC A, 129(4), 2001, pp. 919-931

Abstract

We measured resting metabolic rate (RMR), daily energy expenditure (DEE) and metabolisable energy intake (MEI) in two breeds of dog during peak lactation to test whether litter size differences were a likely consequence of allometric variation in energetics. RMR of Labrador retrievers (30 kg, n = 12) and miniature Schnauzers (6 kg, n = 4) averaged 3437 and 1062 kJ/day, respectively. DEE of Labradors (n = 6) and Schnauzers (n = 4) averaged 9808 and 2619 kJ/day, respectively. MEI of Labradors (n = 12) was 22448 kJ/day and of Schnauzers (a = 7) was 5382 kJ/day. DEE of Labrador pups (2.13 kg, n =19) was 974 kJ/day and Schnauzers (0.89 kg, n = 7) were 490 kJ/day. Although Labradors had higher MEIs than Schnauzers during peak lactation, there was no difference in mass-specific energy expenditure between the two breeds. Hence, it is unlikely that litter size variation is a likely consequence of differences in maternal energy expenditure. Individual offspring were relatively more costly for mothers of the smaller breed to produce. Therefore, litter size variations were consistent with the expectation that smaller offspring should be more costly for mothers, but not that smaller mothers should per se invest more resources in reproduction. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 15:14:42