Características do desenvolvimento embrionário de Gallus gallus domesticus, em temperaturas e períodos diferentes de incubação

Dias, Paulo Fernando; Müller, Yara Maria Rauh

doi:10.1590/s1413-95961998000500010

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…An absence of correlation between chronological age and structure is often associated with individual egg size, differences in genetics and breeds, seasonal differences in embryo viability and vigor, in addition to incubation factors and incubator size ( Hamburger & Hamilton, 1992 ). Moreover, the temperature difference and duration of incubation jointly influence morphogenesis ( Dias & Müller, 1998 ).…”

Section: Discussionmentioning

confidence: 99%

Embryonic development of quail eggs (Coturnix coturnix japonica) in a homemade incubator

et al. 2023

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Knowledge of the embryonic development of species such as quail is important for our understanding of its production and reproduction. Quail provides a practical solution to the animal protein shortage problem in developing countries and is an excellent alternative to chicken (Shanaway, 1994). This study evaluated quail embryonic viability by comparing the main morphological changes that occur over the development in a homemade incubator with previous data; the incubator was built using easily accessible and low-cost materials, which allows small producers and communities to develop quail farms as an activity to increase income or even produce a source of animal protein for the community in the Brazilian Amazon region. The homemade incubator measured 40 cm × 42 cm × 32 cm and was constructed with wooden boards, a digital thermostat, and an incandescent lamp. A total of 24 fertile eggs were incubated at a temperature of 37.5 °C and 60% relative humidity; age “0” was set at the start of incubation. Two eggs were opened on each day of development, starting from day 5 to day 16 of incubation. After gently opening the eggs, the embryos were removed, separated from the placenta and amniotic fluid, washed with running water, and weighed on a digital scale (SHIMADZU AUY 220 brand and UNI BLOC model). Crown-rump length and other measurements were performed with a digital caliper and the morphological structures were observed using a stereomicroscope (NOVA brand and NOVA ZTX-E model). All eggs opened contained live embryos, indicating that the homemade incubator temperature, relative humidity, and manual turning were adequate to maintain the quail's viability. The morphometric data of the embryos at different developmental time points were similar to those described in the literature. Embryos weighed 0.0069 g at day 5 and 4.7863 g at day 16, and the crown-rump length (CRL) means were 0.368 cm and 3.657 cm, respectively. Weight and CRL increased by 0.434 g and 2.593 cm per day of incubation, respectively. In conclusion, after 16 days of incubation in a homemade incubator, the embryos presented all phases of the development cycle, with appropriate development of weight and height based on the days of incubation without anomaly or external interference. These findings demonstrate that the homemade incubator does not alter the embryonic development of quail embryos in the Brazilian Amazon region.

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Section: Discussionmentioning

confidence: 99%

Embryonic development of quail eggs (Coturnix coturnix japonica) in a homemade incubator

et al. 2023

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“…There are several studies that observed the effect of temperature on length of incubation (Michels et al, 1974;French 1994, Suarez et al, 1996, on the rate of embryo growth (Decuypere et al, 1979;Dias and Muller, 1998), and on hatchability (Wilson, 1991;Lourens et al, 2005). However, there are few studies about these effects on Japanese quail incubation performance.…”

Section: Introductionmentioning

confidence: 99%

Incubation of Japanese Quail Eggs at Different Temperatures: Hatchability, Hatch Weight, Hatch Time and Embryonic Mortality

Romao¹,

Moraes²,

Teixeira³

et al. 2009

AVS

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A AB BS ST TR RA AC CT TTemperature is the most important factor affecting embryonic development, hatchability and post hatch performance. Optimum incubation temperature is normally defined as that required to achieve maximum hatchability. This work was carried out to verify the effects of different incubation temperatures on hatchability, hatch weight, hatch time and embryonic mortality of Japanese quail eggs. A total of 800 eggs were divided in eight experimental groups that were incubated at different temperatures (34, 35, 36, 37, 38, 39, 40 and 41ºC). The other incubation conditions were identical for all groups, 60±5% of relative humidity and egg turning every two hours until transference to the hatchers at 15 days of incubation. The results showed that fertile hatchability was higher for eggs incubated at 37 and 38ºC, 76.6 and 80.7%, respectively. Eggs incubated at 34ºC did not hatch and the ones incubated at 35 and 41ºC showed very poor hatchability. The other temperatures had hatch rates from 50.3 to 57.7%. There were higher hatch weights in eggs incubated at high temperatures (38-41°C) compared t o the ones incubated at the lower ones (35-37°C). T here was an enormous difference in the hatching time according to the incubation temperature. The difference of time between the groups of eggs that hatched earlier (40°C) compared to the ones the hatcher later (35°C) was 156.3 hou rs or 6.5 days. Embryos seemed to be resistant to at high temperatures until 40°C at the early period of incubation, ho wever the same was not observed at the later stages of incubation when high temperatures (39-41°C) increased embryoni c mortality.Key words: hatch performance; humidity; poultry; temperature R RE ES SU UM MO OA temperatura é o fator mais importante para o desenvolvimento embrionário, a eclodibilidade e o desempenho pós-nascimento de aves. A temperatura ideal é normalmente aquela que permite máxima eclodibilidade. Este trabalho verificou os efeitos de diferentes temperaturas de incubação sobre a eclodibilidade, perda de peso dos ovos, peso ao nascer, tempo de nascimento e mortalidade embrionária de ovos de codornas japonesas. Foram utilizados 800 ovos, divididos em oito grupos experimentais e incubados em diferentes temperaturas (34, 35, 36, 37, 38, 39, 40 e 41ºC). As demais condições de incubação foram idênticas para todos os grupos, 60±5% de umidade relativa e viragem a cada 2 horas até a transferência para a nascedoura no 15º dia de incubação. A eclodibilidade dos ovos férteis foi maior para os ovos incubados a 37 e 38ºC; 76,6 e 80,7%, respectivamente. Os ovos incubados a 34ºC não eclodiram e os incubados a 35 e 41ºC apresentaram um índice muito baixo de eclodibilidade. As outras temperaturas proporcionaram eclodibilidade entre 50,3 e 57,7%. Os pesos ao nascer foram elevados nos grupos incubados em temperaturas altas (38-41°C) quando comparados aos grupos incubados em temperaturas baixas (35-37°C). Observou-se diferen ça no tempo de nascimento de acordo com a temperatura de incubação. A diferença de tempo entre o...

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Greater rhea (Rhea americana) external morphology at different stages of embryonic and fetal development

Almeida

Sousa

Bezerra

et al. 2015

Animal Reproduction Science

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Características do desenvolvimento embrionário de Gallus gallus domesticus, em temperaturas e períodos diferentes de incubação

Cited by 3 publications

References 12 publications

Embryonic development of quail eggs (Coturnix coturnix japonica) in a homemade incubator

Embryonic development of quail eggs (Coturnix coturnix japonica) in a homemade incubator

Incubation of Japanese Quail Eggs at Different Temperatures: Hatchability, Hatch Weight, Hatch Time and Embryonic Mortality

Greater rhea (Rhea americana) external morphology at different stages of embryonic and fetal development

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