Artificial incubation of trumpeter swan eggs: Selected factors affecting hatchability

Hamilton, E.C.; Hunter, Douglas B.; Smith, Dale A.; Michel, Pascale

doi:10.1002/(sici)1098-2361(1999)18:5<403::aid-zoo5>3.0.co;2-8

Cited by 8 publications

(9 citation statements)

References 22 publications

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“…0001) (Figure). These results partially agree with those found for other ratites (Deeming, 1997;Ar and Gefen, 1998;Sahan et al, 2003) and poultry species (Hamilton et al, 1999;Fasenko et al, 2001), but in those cases hatchability was not affected until pre-incubation storage periods were longer. Several of these authors found an interaction between storage temperature and length of the storage period and, consequently, almost all of them recommend decreasing the storage temperature as storage is extended (Brake et al, 1997;Deeming, 1997;Ar and Gefen, 1998;Fasenko et al, 2001;Bourassa et al, 2003;Sahan et al, 2003).…”

Section: Resultssupporting

confidence: 91%

“…During storage, eggs were set with the small end down (Hamilton et al, 1999;van Schalkwyk et al, 1999;Sahan et al, 2003) in a modified refrigerator at 13 to 17 C and approximately 99% relative humidity. After storage, eggs were moved to an incubation room maintained at 26 AE 0 .…”

Section: Methodsmentioning

confidence: 99%

“…During storage of unincubated eggs, environmental conditions are maintained within certain limits to keep the embryo in the best condition to resume development when incubation begins (Deeming, 1997;Ar and Gefen, 1998). However, hatchability falls as storage time increases (Deeming, 1997;Ar and Gefen, 1998;Hamilton et al, 1999;Fasenko et al, 2001). Furthermore, the optimum storage time for a given species is not fixed because the length of time and the conditions to which eggs are exposed in the nest prior to collection and during storage also affect hatchability (Fasenko et al, 1991;Brake et al, 1997;van Schalkwyk et al, 1999;Sahan et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Effects of storage time on hatchability of artificially incubated Greater Rhea (Rhea americana) eggs

Lábaque¹,

Navarro²,

Martella³

2004

British Poultry Science

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(1) A study was conducted to determine the effects of the length of the storage period on the hatchability of artificially incubated Greater Rhea eggs. Hatchability was evaluated in eggs gathered daily from a captive population and in eggs collected less frequently from a semi-captive population. (2) Eggs form both sites were either immediately incubated after being collected or were stored for 1 to 9 d prior to incubation. (3) The maximum number of days for which an egg could be stored without depressing hatchability (with respect to non-stored eggs) was longer in the eggs collected daily. (4) Eggs collected daily and stored for 4d or more showed total hatchability (28%) and fertile hatchability (43%) which was approximately 30% lower than non-stored eggs or eggs stored for 3 d or less. In the semi-captive population, the total and fertile hatchability of non-stored eggs and of eggs stored for one day were 40% greater than of eggs stored for 2 to 9 d (20 and 34%, respectively). (5) The period for which Greater Rhea eggs could be stored without depressing hatchability varied depending on the frequency of egg collection: non-daily egg collection reduces the possible period of storage.

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Section: Resultssupporting

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of storage time on hatchability of artificially incubated Greater Rhea (Rhea americana) eggs

Lábaque¹,

Navarro²,

Martella³

2004

British Poultry Science

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“…Most of the infectious agents isolated from Greater Rhea eggs have been found in Ostrich eggs (More, 1996;Deeming, 1997), Lesser Rhea eggs (Chang Reissig and Robles, 2000), and other poultry species (Bruce and Drysdale, 1991;Hamilton et al, 1999). More research should be undertaken to determine if some micro-organ- isms are more likely to reduce hatchability than others, as has been demonstrated in poultry (Bruce and Drysdale, 1991).…”

Section: Discussionmentioning

confidence: 99%

“…The latter were set with the small end down (Hamilton et al, 1999;van Schalkwyk et al, 1999) into a modified refrigerator at 13 to 17 C and approximately 99% relative humidity (Deeming, 1997). After a storage period shorter than 7 d the eggs were moved to an incubation room maintained at 26 .…”

Section: Methodsmentioning

confidence: 99%

Microbial contamination of artificially incubated Greater Rhea (Rhea americana) eggs

Lábaque¹,

Navarro²,

Martella³

2003

British Poultry Science

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1. This paper is a report of biological agents that contaminate Greater Rhea (Rhea americana) eggs during artificial incubation. 2. The cleanliness of eggs when collected, and the period of storage prior to incubation, were investigated to assess their effects on microbial contamination and hatchability. 3. A total of 14 bacteria and 4 fungi species were isolated within the egg in the laboratory. 4. Microbial contamination was higher (24%) in very dirty eggs than in eggs which were clean or dirty (16%). Hatching success was lower (30%) for very dirty eggs, compared with 42% for clean or dirty eggs. 5. The percentage of microbial contamination of stored eggs (10%) did not differ significantly from that of non-stored ones (5%). 6. The extreme lower and upper limits of infection rate estimated for artificially incubated Greater Rhea eggs were 4% and 40%, respectively, being higher than in poultry species. 7. It is concluded that collecting eggs soon after laying will reduce the risk of microbial contamination.

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Captive rearing sage-grouse for augmentation of surrogate wild broods: Evidence for success

et al. 2015

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Both species of North American sage‐grouse (Centrocercus spp.) have experienced declines in distribution and abundance. Translocation of adult birds from a stable population to a small or declining population has been a management tool used by wildlife managers to support population persistence in these areas. Captive rearing chicks and releasing them into wild surrogate broods is an untested alternative to augment declining populations of sage‐grouse. We developed techniques to successfully rear sage‐grouse chicks in captivity, evaluated explanatory variables that could influence hatch and captive‐rearing success, and estimated the survival of domestically hatched (DH) chicks to 28 days of age following introduction to a surrogate wild brood. We collected 304 eggs from radiomarked female greater sage‐grouse (C. urophasianus) during 2004–2007 in 3 study areas in northwestern Colorado. Estimated hatching success of collected eggs was 0.745 (SE = 0.022, 95% CI = 0.700–0.786) and was negatively influenced by the number of days an egg was stored and the percent egg weight loss that occurred during storage and incubation. We monitored 175 DH chicks in captivity for 1–10 days before introduction and adoption into surrogate wild broods. Model‐averaged captive‐rearing success was 0.792 (SE = 0.045, 95% CI = 0.686–0.865) across years, and was positively influenced by initial chick mass at hatch and daily weight gain in captivity but negatively influenced by the number of days the egg was stored and advancing hatch date. We were able to radiomark and monitor 133 DH chicks adopted into surrogate wild broods until 28 days of age. Eighty‐eight percent of DH chicks were successfully adopted within 24 hours. Our overall estimate of DH chick survival to 28 days (0.423; 95% CI = 0.257–0.587) was comparable to published wild‐hatched chick survival. Predation and exposure‐related deaths accounted for 26.3% and 25.6% of the known fates, respectively. Our captive‐rearing protocols and techniques were successful for collecting greater sage‐grouse eggs, hatching and rearing chicks in captivity, and releasing chicks into wild surrogate broods. This success further implies that captive rearing and release can be a potential management strategy to demographically and genetically reinforce or augment small populations of sage‐grouse. © 2015 The Wildlife Society.

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Artificial incubation of trumpeter swan eggs: Selected factors affecting hatchability

Cited by 8 publications

References 22 publications

Effects of storage time on hatchability of artificially incubated Greater Rhea (Rhea americana) eggs

Effects of storage time on hatchability of artificially incubated Greater Rhea (Rhea americana) eggs

Microbial contamination of artificially incubated Greater Rhea (Rhea americana) eggs

Captive rearing sage-grouse for augmentation of surrogate wild broods: Evidence for success

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