Zobrazeno 1 - 10 of 54 pro vyhledávání: '"Swp Cloete"'
1
Ostrich (Struthio camelus) embryonic development from 7 to 42 days of incubation
Autor: Zanell Brand, Swp Cloete, Irek Malecki, Chris Brown
Publikováno v: British Poultry Science. 58:139-143
1. Hatching success of ostrich eggs is poor (50–60% of fertile eggs). The current study was designed to identify the timing of key stages in the development of the ostrich embryo. 2. Growth of both embryo and wing length during 42 d of incubation w
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::539a726e94e798fc043fc183c370b1c9
https://doi.org/10.1080/00071668.2016.1259529
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2
Embryonic development in the ostrich (Struthio camelus) during the first 7 days of artificial incubation
Autor: Irek Malecki, Zanell Brand, Swp Cloete, Chris Brown
Publikováno v: British Poultry Science. 55:68-75
1. Early development of ostrich embryos was investigated in relation to time of egg collection and genotype. 2. A total of 321 ostrich eggs were collected during the 2008 and 2009 breeding seasons and the development of the embryo for up to the first
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a59c4690cdb7de9da7990c2e33c8d70f
https://doi.org/10.1080/00071668.2013.864045
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3
Genetic parameters for eggshell traits in ostriches
Autor: Chris Brown, Zanell Brand, Irek Malecki, Swp Cloete
Publikováno v: British Poultry Science. 53:316-324
1. A study was conducted on 14000 ostrich eggs to estimate genetic parameters for eggshell traits that could benefit the hatchability of ostrich eggs. Traits measured included the number of pores on the eggshell, the average diameter of these pores,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc34266ebbf37cd96c3d27ba902bff85
https://doi.org/10.1080/00071668.2012.695338
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4
Factors related to shell deaths during artificial incubation of ostrich eggs
Autor: Irek Malecki, Swp Cloete, Chris Brown, Zanell Brand
Publikováno v: Journal of the South African Veterinary Association, Vol 78, Iss 4, Pp 195-200 (2007)
The ostrich industry experiences a high rate of embryonic mortalities during artificial incubation of eggs. Embryonic deaths were studied from data recorded on 37,740 fertile eggs incubated artificially during the 1998-2005 breeding seasons. Roughly
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd21d5858f2393507dfcb9fdb9f887c3
https://doi.org/10.4102/jsava.v78i4.322
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5
Variance components for live weight, body measurements and reproductive traits of pair-mated ostrich females
Autor: H. Lambrechts, J.P.C. Greyling, Swp Cloete, D. Swart, Zanell Brand, Kim L Bunter
Publikováno v: British Poultry Science. 47:147-158
Estimates of genetic parameters for reproductive traits, live weight and body measurements were obtained using data from a pair-mated ostrich flock at Oudtshoorn in South Africa. Reproductive traits included total egg and chick production, along with
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f71873dcedb133beed4c45439b2d3cbc
https://doi.org/10.1080/00071660600610658
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6
Dead-in-shell positions of near-term ostrich embryos
Autor: Zanell Brand, Chris Brown, Irek Malecki, Swp Cloete
Publikováno v: South African Journal of Animal Science, Volume: 47, Issue: 1, Pages: 2-6, Published: 2017
South African Journal of Animal Science; Vol 47, No 1 (2017); 2-6
The patterns of embryonic development in ostriches, especially in the last stage of hatching, are still not well understood. This study examined between 3468 and 3484 dead-in-shell (DIS) eggs with chicks that died between day 35 and day 42 of artific
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf12e58d2abe6e171702d742fa7732f1
https://doi.org/10.4314/sajas.v47i1.2
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7
Changes in the air cell volume of artificially incubated ostrich eggs
Autor: Swp Cloete, Chris Brown, Irek Malecki, Zanell Brand
Publikováno v: South African Journal of Animal Science; Vol 43, No 1 (2013); 98-104
South African Journal of Animal Science, Volume: 43, Issue: 1, Pages: 104-98, Published: 2013
A total of 2160 images of candled, incubated ostrich eggs were digitized to determine the percentage of egg volume occupied by the air cell at different stages of incubation. The air cell on average occupied 2.5% of the volume of fresh eggs. For eggs
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::715a02c964febdcdede00db682311684
https://doi.org/10.4314/sajas.v43i1.12
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10
Influence of incubation management on pipping position, hatching ability and survival of ostrich chicks
Autor: Irek Malecki, Swp Cloete, Chris Brown, Zanell Brand
Publikováno v: South African Journal of Animal Science, Volume: 41, Issue: 3, Pages: 265-274, Published: 2011
South African Journal of Animal Science; Vol 41, No 3 (2011); 265-274
Despite numerous studies, the effect of artificial incubation on the hatchability and survival of near-term ostrich chicks is still not well understood. Records from 13 975 eggs with embryos of 35 days and older, artificially incubated between 2006 a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::babb0a57aeba5b62abefbb1d4ee35b9e
https://doi.org/10.4314/sajas.v41i3.9
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