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| Registros recuperados: 42 | |
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| BREYER, F. R. dos S.. |
| O jacare no Pantanal, e uma especie que ha quase uma decada vem sofrendo enorme pressao de caca clandestina, devido ao valor economico de seu couro e ao impedimento de sua utilizacao na forma de individuos adultos. O uso deste recurso natural necessita de legalizacao para tornar-se um complemento economico para as propriedades da regiao, hoje, exclusivamente sustentadas pela pecuaria. Atualmente, o manejo sustentado da especie, em condicoes naturais, e a forma mais viavel para sua explotacao racional. Baseia-se na coleta de ovos, sua incubacao e a manutencao dos filhotes em cativeiro. Um percentual dos filhotes nascidos, apos alcancarem um porte de mais de 60 cm de comprimento total, quando estao menos susceptiveis as predacoes naturais, serao repostos na... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Coleta; Caiman Crocodylus yacare; Animal silvestre; Alligator; Incubation; Collect; Savage animal; Management.; Incubação; Manejo; Jacaré; Transporte.; Wildlife.. |
| Ano: 1987 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787740 |
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| Rimblot, F; Fretey, J; Lescure, J; Pieau, C. |
| Sexual differentiation of the marine leatherback turtle is sensitive to temperature. Incubation of eggs below 29 degree C results in 100% males, whereas incubationa bove 30 degree C results in 100% potential females at hatching. Therefore, the threshold temperature lies between 29 and 30 degree C as has been found for other marine turtles (Caretta caretta, Chelonia mydas ). Among hatchlings from natural nests in French Guiana, 10% were males, 20% were potential females and 70% had an intermediate phenotype. The sand temperature at 60 cm of depth, near one nest, was recorded and was found to vary between 29 and 30 degree C during the presumed thermosensitive period. These results will be useful to marine turtle hatcheries which seek to manipulate sex ratios... |
| Tipo: Text |
Palavras-chave: Dermochelys coriacea; Chelonia mydas; Reptilia; Hatcheries; Natural populations; Incubation; Turtle culture; Eggs; Temperature effects; Sexual dimorphism. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/1983/acte-1241.pdf |
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| Szeleszczuk,Ł; Pisklak,DM; Wawer,I. |
| ABSTRACT The water content of the chicken eggshell has a major influence on gas (CO2 and O2) permeability. Inappropriate water loss during the incubation period increases embryo mortality and decreases chick quality. So far only the procedures that enable to determine the total water content in the eggshell have been described and developed. Our analysis of the 1H MAS NMR spectra of the chicken eggshell samples revealed three signals, differing significantly in the chemical shift and relaxation times (T1) parameters. In this work we have assigned those signals and described the changes in their intensities that occur during the incubation period. Using 1H MAS NMR it is possible to distinguish two types of water reservoirs in the chicken eggshell. This... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water; Chicken eggshell; NMR; Incubation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600027 |
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| Gualhanone,A; Furlan,RL; Fernandez-Alarcon,MF; Macari,M. |
| Two experiments were carried out to study the effect of breeder age on incubation parameters (hatchability, eggshell thickness, egg surface temperature and chick weight). In Exp. 1, fertile eggs (30- and 60-wk-old breeders) were incubated at three different temperatures (36.8, 37.8 and 38.8 ºC). Eggshell surface temperature was measured by attaching a thermocouple to the shell and data were collected in a datalogger every ten minutes. This study was conducted according to a 3 x 2 factorial design (three temperatures and two breeder ages). Data revealed that eggshell surface temperature changed according to incubation temperature, with the main increase occurring between 10 and 13 days of incubation, and that the maximum increase in eggshell surface... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler breeder; Development; Embryo; Temperature; Incubation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000100002 |
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| Almeida,JG; Vieira,SL; Reis,RN; Berres,J; Barros,R; Ferreira,AK; Furtado,FVF. |
| This study investigated the hatching distribution of eggs from broiler breeders of different ages in distinct periods of incubation. Eggs were incubated in a single-stage experimental incubator. A number of 3.510 eggs were distributed into 3 treatments with 13 replicates of 90 eggs each. Treatments corresponded to breeder age: young (34 weeks), intermediate-age (44 weeks) and old (72 weeks) breeders. Eggs were transferred to the hatcher at 432 incubation hours, hatching was first checked at 449 hours, after which the number of hatched chicks was counted every 6 hours up to 515 incubation hours. After each count, hatched chicks were removed from the hatcher. Data were submitted to analysis of variance using measures repeated. A significant interaction... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler chicks; Embryo mortality; Incubation; Post-hatching management. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200003 |
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| Nakage,ES; Cardozo,JP; Pereira,GT; ,SA; Boleli,IC. |
| The aim of this study was to determine the effects of incubation temperature (34.5; 35.5; 36.5; 37.5 and 38.5ºC), on incubation period, embryonic mortality, hatching rate, water loss and chick weight at hatch, using daily incubation of partridge (Rhynchotus rufescens) eggs. The highest hatching percentage was obtained between 35.5 and 36.5ºC. Incubation length and temperature were inversely proportional. Water loss was lower in eggs incubated at low temperatures as compared to high temperatures. There was no difference among incubation temperatures in absolute and relative hatchling weights. Early embryonic mortality increased at low temperatures (<35.5ºC), whereas intermediate and late embryonic mortality increased at high temperatures (>36.5ºC).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Incubation; Hatchability; Mortality; Temperature; Water loss. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000200007 |
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| Roriz,BC; Sgavioli,S; Garcia,RG; Nääs,IA; Domingues,CHF; Caldara,FR; Rombola,LG; Ayla,CM; Bernnecke,K. |
| ABSTRACT Long storage periods may increase embryo mortality. The objective of this study was to evaluate the effects of storage period on the weight loss, eggshell surface temperature, hatchability, and embryonic mortality of Japanese quail eggs. Two hundred fertile eggs were collected from a flock of 30-week-old Japanese quails (Coturnix coturnix japonica). The eggs were collected for 10 consecutive days after lay, and immediately incubated. A completely randomized experimental design with 10 treatments, corresponding to the number of days eggs were stored between egg collection and setting, with 20 replicates each, was applied. Egg weight loss increased with storage period duration, starting on day 6 (2.1%, on average) and reached 3.26%, on average, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryo; Hatchability; Incubation; Laying; Temperature. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400589 |
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| Molenaar,R; Reijrink,IAM; Meijerhof,R; Van den Brand,H. |
| During incubation of chicken embryos, environmental conditions, such as temperature, relative humidity, and CO2 concentration, must be controlled to meet embryonic requirements that change during the different phases of embryonic development. In the current review, the effects of embryo temperature, egg weight loss, and CO2 concentration on hatchability, hatchling quality, and subsequent performance are discussed from an embryonic point of view. In addition, new insights related to the incubation process are described. Several studies have shown that a constant eggshell temperature (EST) of 37.5 to 38.0°C throughout incubation results in the highest hatchability, hatchling quality, and subsequent performance. Egg weight loss must be between 6.5 and 14.0%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler embryos; CO2 concentration; Incubation; Relative humidity; Temperature. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000300001 |
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| Registros recuperados: 42 | |
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