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Journal of Animal Science and Technology
(JAST)영문학술지
Vol. 56, 57(2014~)
[한국동물자원과학회]
▣ 편집위원장 : 최인호
▣ 편집위원 : 정호영, 최창원, 이철영, 오세종, 김관석,
    이홍구, 송민호, 김은중, 조철훈

논문번호 :
1396
학회지년월 : 201712
접수일자 : 2017-06-08 채택일자 : 2017-12-04
전공분야 : 단위가축영양
조 회 수 : 7
Milk yield and kit development of four
breeds of rabbit in Ibadan, Nigeria

Olatunji Abubakar Jimoh1,2* and Emmanuel Olabisi Ewuola1

Background: Rabbit breeding with high performance imported ones would be of benefit for genetic diversity and
improvement of performance in domestic rabbit breeds. The rearing of more productive rabbit breeds could be
pathway to improve the productivity and reduce the production cost. Maternal nutritional status exert a great
influence on reproductive functions of does, which may expand from conception, through gestation and
parturition and development of kits to puberty.
Methods: Four breeds of rabbit were evaluated for their parturition, weaning and pubertal differences among the
rabbit population in Ibadan, Nigeria. The breed consist of Fauve De Bourgogne (FDB), Chinchilla (CHA), British Spot
(BS) and New Zealand White (NZW) rabbits. A total of 60 bucks and 360 does consisting of 15 bucks and 90 does
per breed were mated in 6 mating cycles, three each of natural mating and artificial insemination. All does were
synchronized for estrus with 20 IU pregnant mare serum gonadotropin 48 h prior to mating. The does after
parturition were assessed for milk yield (g) and kit survival rate (%) till weaning, weight changes of kits from birth to
puberty. At puberty, the pubertal age (days) and weight (g) of the offspring were assessed.
Result: Results obtained reveals that British Spot doe had highest milk yield among the breeds which significantly
increased growth of kit and weight at weaning in British Spot rabbits. Survival rates of Chinchilla kits were
significantly (p < 0.05) higher than Fauve de Bourgogne, British Spot and New Zealand White kits. Puberty
attainment of the rabbits indicates that British spot does and Fauve de Bourgogne bucks are early maturing.
Conclusion: Chinchilla shows high kit survivability and British spot has highest milk yield among the four breeds of
rabbit.
Keywords: Survival rates, Litter size, Puberty, Lactation changes, rabbit breeds, Mating systems, Milk yield
논문번호 :
1397
학회지년월 : 201712
접수일자 : 2017-08-30 채택일자 : 2017-12-11
전공분야 : 단위가축영양
조 회 수 : 1
Effects of amino acid composition in pig
diet on odorous compounds and microbial
characteristics of swine excreta

Neeraja Recharla1†, Kihyun Kim2†, Juncheol Park2, Jinyoung Jeong2, Yongdae Jeong2, Hyunjeong Lee2,
Okhwa Hwang2, Jaehyoung Ryu1, Youlchang Baek2, Youngkyun Oh2 and Sungkwon Park1*

Background: Major amino acids in pig diets are Lys, Met, Thr, and Trp, but little is known about the requirements
for the other essential amino acids, especially on odorous compounds and microbial characteristics in feces of
growing-finishing pigs. To this end, different levels of amino acid composition added to diets to investigate the
effects of amino acid composition on microbial characteristics and odorous compounds concentration.
Methods: A total eight (n = 8) barrows (Landrace × Yorkshire × Duroc) with an average bodyweight of 89.38 ± 3.
3 kg were individually fed diets formulated by Korean Feeding Standards 2007 (old version) or 2012 (updated with
ideal protein concept) in metabolism crates with two replication. After 15-day adaptation period, fresh faecal
samples were collected directly from pigs every week for 4 weeks and analysed for total volatile fatty acids (VFA),
phenols and indoles by using gas chromatography. The nitrogen was determined by Kjeldahl method. Bacterial
communities were detected by using a 454 FLX titanium pyrosequencing system.
Results: Level of VFA tended to be greater in 2012 than 2007 group. Among VFAs, 2012 group had greater (p < 0.05)
level of short chain fatty acids (SCFA) than control.Concentration of odorous compounds in feces was also affected by
amino acid composition in pig diet. Levels of ammonium and indoles tended to be higher in 2012 group
when compared with 2007 group.Concentration of phenols, p-cresol, biochemical oxygen demand, and total
Kjeldahl nitrogen, however, were lower (P < 0.05) in 2012 treatment group compare to 2007. The proportion
of Firmicute phylum were decreased, while the Bacteriodetes phylum proportion increased and bacterial genera
includingCoprococcus, Bacillus, and Bacteroides increased (p < 0.05) in 2012 compare to 2007 group.
Conclusion: Results from our current study indicates that well balanced amino acid composition reduces odor by
modulating the gut microbial community. Administration of pig diet formulated with the ideal protein concept may
help improve gut fermentation as well as reduce the odor causing compounds in pig manure.
Keywords: Ideal protein, Amino acid, Growth performance, Microbial communities, Short chain fatty acid (SCFA),
Pyrosequencing, Volatile odorous compounds (VOS)
논문번호 :
1394
학회지년월 : 201711
접수일자 : 2017-08-03 채택일자 : 2017-11-10
전공분야 : 번식생리및내분비
조 회 수 : 11
Choosing a culture medium for SCNT and
iSCNT reconstructed embryos: from
domestic to wildlife species

A. Cordova1,2, W. A. King1 and G. F. Mastromonaco1,2*

Over the past decades, in vitro culture media have been developed to successfully support IVF embryo growth in a
variety of species. Advanced reproductive technologies, such as somatic cell nuclear transfer (SCNT), challenge us
with a new type of embryo, with special nutritional requirements and altered physiology under in vitro conditions.
Numerous studies have successfully reconstructed cloned embryos of domestic animals for biomedical research
and livestock production. However, studies evaluating suitable culture conditions for SCNT embryos in wildlife
species are scarce (for both intra- and interspecies SCNT). Most of the existing studies derive from previous IVF work
done in conventional domestic species. Extrapolation to non-domestic species presents significant challenges since
we lack information on reproductive processes and embryo development in most wildlife species. Given the
challenges in adapting culture media and conditions from IVF to SCNT embryos, developmental competence of
SCNT embryos remains low. This review summarizes research efforts to tailor culture media to SCNT embryos and
explore the different outcomes in diverse species. It will also consider how these culture media protocols have
been extrapolated to wildlife species, most particularly using SCNT as a cutting-edge technical resource to assist in
the preservation of endangered species.
Keywords: Somatic cell nuclear transfer, in vitro culture, Culture media, Nutrients, Embryos, Domestic species,
Wildlife species
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