Seasonal Variation in Reproductive Traits of New Zealand White Rabbits

Sittmann, D. B.; Rollins, W. C.; Sittmann, K.; Casady, R. B.

doi:10.1530/jrf.0.0080029

Cited by 27 publications

(6 citation statements)

References 5 publications

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“…Sittman et al [7] have found a decrease in litter size from February through September indicating a relationship to the monthly temperature which, however, is constant in our airconditioned laboratories. …”

Section: Discussioncontrasting

confidence: 55%

Identification of a Substrain of Himalayan Rabbits Produced in Japan

Matsuo

Kazuta

Kast

1981

Experimental Animals

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Section: Discussioncontrasting

confidence: 55%

Identification of a Substrain of Himalayan Rabbits Produced in Japan

Matsuo

Kazuta

Kast

1981

Experimental Animals

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“…The low conception rate may also be a result of either fertilization failure or early embryonic mortality (Marai and El-Kelawy, 1999). However, Sittman et al (1964) showed that females refused mating most frequently in some seasons, but less frequently in other seasons. The same authors added that the conception rate from forced matings which were practised in such cases was, generally, low and inversely proportional to the seasonal frequency of this type of mating.…”

Section: Effect Of Kindling Seasonmentioning

confidence: 98%

Tolerance of New Zealand White and Californian doe rabbits at first parity to the sub-tropical environment of Egypt

2006

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“…Several factors influence postweaning growth of rabbits. Climatic variations on a seasonal or shorter basis have been shown to have definite effects on doe productivity (Ross et al, 1961;Sittmann et al, 1964;McNitt and Moody, 19901, but few studies have been conducted in the United States of the effects of climate on fryer production. Rollins and Casady (19601, in California, found no effect of season on individual weaning weight at 56 d; however, season did affect total litter weight at 56 d (Casady et al, 1962).…”

Section: Introductionmentioning

confidence: 99%

Breed and environmental effects on postweaning growth of rabbits

McNitt

Lukefahr

1993

Journal of Animal Science

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Growth records of 4,270 weanling rabbits born between March 1985 and December 1989 were studied to evaluate the effects of breed and month of birth on postweaning growth performance of four medium-sized breeds. Californian (CAL), New Zealand White (NZW), Palomino (PAL), and White Satin (WS). Traits examined were 28-d weaning weight (WW), postweaning gain (GAIN), attainment of 1,600-g market weight by 76 d of age (MKT), and approximate age at 1,600 g (AGE). Least squares models included breed, month of birth, sex, and year of birth as fixed effects and litter within breed by month and by year and the residual as random variables. The NZW had significantly higher GAIN and MKT and lower AGE than the other three breeds. White Satin had the highest WW, followed by CAL, NZW, and PAL. White Satin had higher GAIN and lower AGE than PAL or CAL but did not differ for MKT. Poorer performance was seen during the summer, but the NZW tended to be less affected by the environmental extremes than the other breeds. The effects on GAIN of mean monthly temperature and daylength and the interrelationships of these with estimated milk production and litter size at weaning were evaluated by regression methods for the 2,100 NZW fryers. Temperature and daylength had significant effects on GAIN, with lowest GAIN in the summer, but the individual contributions to the variance were small because of some redundancy when month, temperature, and (or) light were included in the same model. Curvilinear trends were observed that favored GAIN as estimated milk production increased but decreased GAIN as litter size at weaning increased. In the hot, humid climate of southern Louisiana important breed differences were noted. There were also indications that daylength may be an important factor in postweaning fryer performance.

show abstract

Seasonal Variation in Reproductive Traits of New Zealand White Rabbits

Cited by 27 publications

References 5 publications

Identification of a Substrain of Himalayan Rabbits Produced in Japan

Identification of a Substrain of Himalayan Rabbits Produced in Japan

Tolerance of New Zealand White and Californian doe rabbits at first parity to the sub-tropical environment of Egypt

Breed and environmental effects on postweaning growth of rabbits

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