Base de dados : MEDLINE
Pesquisa : G08.686.160 [Categoria DeCS]
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[PMID]:29401573
[Au] Autor:Kirillova NY; Kirillov AA
[Ti] Título:[The number of larvae and period of its production of Cosmocerca Ornata females (Nematoda: Cosmocercidae)].
[So] Source:Parazitologiia;51(1):22-37, 2017 Jan-Feb.
[Is] ISSN:0031-1847
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:The number of larvae in the Cosmocerca ornata (Dujardin, 1845) females from marsh frogs in vivo and period of larvae production of nematodes in vitro was studied. The number of larvae in females of nematodes and quantity of born larvae depend on the size of parasites. The largest C. ornata females had the highest number of larvae and the longest period of larvae production. The nematode sizes in its turn depends on density of infrapopulation of C. ornata and ambient temperature. The dependence of a number of the C. ornata larvae on the host age and sex and on a season of the year was revealed. Different phenotypes of amphibians showed no influence on the number of larvae inside nematode females. In the experiment C. ornata females remained viable up to 8 days, producing larvae up to 7 days. The optimum temperature for the larvae production constituted 24­28 °C. At a temperature of 12 °C and lower the nematode larvae output from females was stopped.
[Mh] Termos MeSH primário: Anuros/parasitologia
Ascaridídios/fisiologia
Larva/fisiologia
[Mh] Termos MeSH secundário: Animais
Ascaridídios/patogenicidade
Tamanho Corporal
Tamanho da Ninhada
Feminino
Larva/patogenicidade
Fenótipo
Federação Russa
Estações do Ano
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180206
[St] Status:MEDLINE


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[PMID]:29267351
[Au] Autor:Bastos MS; Del Vesco AP; Santana TP; Santos TS; de Oliveira Junior GM; Fernandes RPM; Barbosa LT; Gasparino E
[Ad] Endereço:Animal Science Department, Federal University of Sergipe, São Cristóvão s/n, Brazil.
[Ti] Título:The role of cinnamon as a modulator of the expression of genes related to antioxidant activity and lipid metabolism of laying quails.
[So] Source:PLoS One;12(12):e0189619, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Since cinnamon has vitamins and minerals in addition to antioxidants compounds in its chemical composition studies have shown the potential of cinnamon supplementation on some important characteristics in the performance of birds. Thus, this study was conducted under the hypothesis that the inclusion of cinnamon in the laying quail diet could influence the performance of the birds through the expression of genes related to antioxidant activity and lipid metabolism. To test this hypothesis, 144 Japanese quail (Coturnix japonica) with an initial age of 18 weeks and average weight of 133g were distributed in a completely randomized design with two treatments: no cinnamon supplementation (NCS-control group) and with supplementation of 9g/kg of cinnamon powder (CPS). The experiment lasted for 84 days. At the end of the experimental period, six animals from each treatment were euthanized by cervical dislocation, blood was collected and organs weighed. Liver tissue was collected for gene expression and biochemical analyses. We observed a significant effect of cinnamon inclusion on the weight of the pancreas (P = 0.0418), intestine (P = 0.0209) and ovary (P = 0.0389). Lower weights of the pancreas and intestine, and a higher ovary weight was observed in birds receiving the CPS diet. Quails fed with cinnamon supplementation also had better feed conversion per egg mass (2.426 g /g, P = 0.0126), and higher triglyceride (1516.60 mg/dL, P = 0.0207), uric acid (7.40 mg/dL, P = 0.0003) and VLDL (300.40 mg/dL, P = 0.0252) contents. A decreased content of thiobarbituric acid reactive substances (TBARS) and lower catalase activity was observed in the liver of quails from the CPS diet (0.086 nmoles/mg PTN, and 2.304 H2O2/min/mg PTN, respectively). Quails from the CPS group presented significantly greater expression of FAS (fatty acid synthase, 36,03 AU), ACC (Acetyl-CoA Carboxylase, 31.33 AU), APOAI (apolipoprotein A-I, 803,9 AU), ESR2 (estrogen receptor 2, 0.73 AU) SOD (superoxide dismutase, 4,933.9 AU) and GPx7 (glutathione peroxidase 7, 9.756 AU) than quails from the control group. These results allow us to suggest that cinnamon powder supplementation in the diet of laying quails can promote balance in the metabolism and better performance through the modulation of antioxidant activity and the expression of genes related to lipid metabolism.
[Mh] Termos MeSH primário: Antioxidantes/metabolismo
Cinnamomum zeylanicum
Coturnix/genética
Regulação da Expressão Gênica/efeitos dos fármacos
Metabolismo dos Lipídeos
[Mh] Termos MeSH secundário: Animais
Catalase/metabolismo
Tamanho da Ninhada
Coturnix/metabolismo
Coturnix/fisiologia
Feminino
Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antioxidants); 0 (Thiobarbituric Acid Reactive Substances); EC 1.11.1.6 (Catalase)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171222
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189619


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[PMID]:29020028
[Au] Autor:Rivera-Gutierrez HF; Martens T; Pinxten R; Eens M
[Ad] Endereço:Grupo Ecología y Evolución de Vertebrados, Instituto de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Medellin, Colombia.
[Ti] Título:Learning speed is affected by personality and reproductive investment in a songbird.
[So] Source:PLoS One;12(10):e0185410, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Individuals from different taxa, including songbirds, differ consistently in behaviour and personality when facing different situations. Although our understanding of animal behaviour has increased, knowledge about between-individual differences in cognitive abilities is still limited. By using an experimental approach and a free-living songbird (Parus major) as a model, we attempted to understand between-individual differences in habituation to playbacks (as a proxy of learning speed), by investigating the role of personality, age and reproductive investment (clutch size). Pre-breeding males were tested for exploration (a proxy of personality) in standardized conditions. In addition, the same individuals were exposed to three playbacks in the field during incubation. Birds significantly moved less, stayed further away and overlapped less the playback with successive playback stimulation. While a decrease in the locomotor behaviour can be explained by personality, differences in habituation of overlapping were predicted by both reproductive investment and personality. Fast explorers habituated less. Moreover, males paired to females with larger clutches did not vary the intensity of overlapping. Since habituation requires information for recognition of non-threatening signals, personality may bias information gathering. While fast explorers may collect less information from the environment, slow explorers (reactive birds) seem to pay attention to environmental clues and collect detailed information. We provided evidence that the rate of habituation of behavioural responses, a proxy of cognitive abilities, may be affected by different factors and in a complex way.
[Mh] Termos MeSH primário: Aprendizagem
Personalidade
Reprodução/fisiologia
Aves Canoras/fisiologia
[Mh] Termos MeSH secundário: Animais
Comportamento Animal
Tamanho da Ninhada
Meio Ambiente
Comportamento Exploratório/fisiologia
Habituação Psicofisiológica
Modelos Lineares
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171012
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185410


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[PMID]:28913635
[Au] Autor:Goldberg JK; Wallace AK; Weiss SL
[Ad] Endereço:Department of Biology, University of Puget Sound, 1500 N. Warner Street, Tacoma, WA, 98416, USA.
[Ti] Título:Skin lipids of the striped plateau lizard (Sceloporus virgatus) correlate with female receptivity and reproductive quality alongside visual ornaments.
[So] Source:Naturwissenschaften;104(9-10):81, 2017 Sep 14.
[Is] ISSN:1432-1904
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Sex pheromones can perform a variety of functions ranging from revealing the location of suitable mates to being honest signals of mate quality, and they are used in the mate selection process by many species of reptile. In this study, we determined whether the skin lipids of female striped plateau lizards (Sceloporus virgatus) can predict the reproductive quality of females, thereby having the potential to serve as pheromones. Using gas chromatography/mass spectrometry, we identified 17 compounds present in skin lipids of female lizards. Using principal component analysis to compare the skin lipid profile of receptive and non-receptive females, we determined that an uncharacterized compound may allow for chemical identification of receptive mates. We also compared extracted principal components to measures of female fitness and reproductive qualities and found that the level of two 18 carbon fatty acids present in a female's skin lipids may indicate her clutch size. Finally, we compared the information content of the skin lipids to that of female-specific color ornaments to assess whether chemical and visual cues transmit different information or not. We found that the chroma of a female's orange throat patch is also related to her clutch size, suggesting that chemical signals may reinforce the information communicated by visual ornamentation in this species which would support the "backup signals" hypothesis for multiple signals.
[Mh] Termos MeSH primário: Lagartos
Reprodução
[Mh] Termos MeSH secundário: Animais
Tamanho da Ninhada
Feminino
Lipídeos
Atrativos Sexuais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Lipids); 0 (Sex Attractants)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170916
[St] Status:MEDLINE
[do] DOI:10.1007/s00114-017-1503-3


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[PMID]:28499128
[Au] Autor:Zarrintab M; Mirzaei R
[Ad] Endereço:Department of Environment, Faculty of Natural Resources and Earth Sciences, University of Kashan, Kashan, Iran. Electronic address: m.zarrintab@gmail.com.
[Ti] Título:Stress induced by heavy metals on breeding of magpie (Pica pica) from central Iran.
[So] Source:Ecotoxicol Environ Saf;143:28-37, 2017 Sep.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to address the impacts of some heavy metals (Cd, Pb, Zn, Ni and Cu) contamination on laying behavior, egg quality and breeding performance of Pica pica in north of Isfahan Province, Iran. During the breeding season of 2013, magpie's egg content and eggshell as well as nestling excrements and feathers were collected and total concentrations of heavy metals were measured by ICP-OES. Except for Zn in nestling feathers, the significantly higher concentrations of heavy metals were observed in nestling excrements than other samples. Also, comparison of heavy metals concentrations in egg content and eggshell showed that egg content had significantly higher concentrations of Zn and Pb, instead eggshell had significantly higher amount of Cu and Cd. Except for Cu, all heavy metals concentrations in eggshell had a negative relationship with morphological characters; and also concentration of Cu in egg content showed a significantly negative correlation with egg weight and volume. The most of heavy metals in nestling feathers and excrements had strongly positive correlations with each other. Also all heavy metals levels in eggshell and egg content had significantly positive correlations (except for Cu). Unhatched eggs had significantly lower weight but also greater levels of Zn, Cd, and Pb, than randomly collected eggs. No significant differences were observed for morphometric measurements of eggs between different sites, however, a decreased gradient was observed in egg volume toward the brick kiln site. Samples collected in brick kiln site accumulated higher concentrations of heavy metals than other sites. Although numbers of clutch size in brick kiln site were significantly higher than other sites, however, other breeding variable were lower than other sites. It can be suggested that ecosystem contamination may be caused to decrease the reproduction rate of Pica pica in brick kiln, probably by laying more poor quality eggs per clutch and nestling mortality.
[Mh] Termos MeSH primário: Monitoramento Ambiental/métodos
Poluentes Ambientais/toxicidade
Metais Pesados/toxicidade
Passeriformes/metabolismo
Reprodução/efeitos dos fármacos
Estresse Fisiológico/efeitos dos fármacos
[Mh] Termos MeSH secundário: Animais
Tamanho da Ninhada/efeitos dos fármacos
Ecossistema
Casca de Ovo/química
Poluentes Ambientais/análise
Plumas/química
Irã (Geográfico)
Metais Pesados/análise
Óvulo/química
Passeriformes/fisiologia
Pica
Distribuição Aleatória
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Metals, Heavy)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170513
[St] Status:MEDLINE


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[PMID]:28237745
[Au] Autor:Aigueperse N; Pittet F; de Margerie E; Nicolle C; Houdelier C; Lumineau S
[Ad] Endereço:Université de Rennes 1, UMR 6552 Ethologie animale et humaine, Rennes, France; CNRS, UMR 6552 Ethologie animale et humaine, Rennes, France.
[Ti] Título:Brood size can influence maternal behaviour and chick's development in precocial birds.
[So] Source:Behav Processes;138:96-104, 2017 May.
[Is] ISSN:1872-8308
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Mothers have a crucial influence on offspring development. Variations of maternal behaviour can be due to numerous parameters, for instance costs are related to the size of a brood/litter, which in turn can influence the level of mothers' investment in each offspring. Here we investigated the influence of brood size on the behaviour of Japanese quail mothers and chicks during the mothering period and on offspring development. We compared two types of broods: small broods of three chicks (N=9) and large broods of six chicks (N=9). Behavioural tests assessed chicks' social and emotional traits. Mothers of large broods emitted more maternal vocalisations at the beginning of the mothering period, but at the end they assumed more non-covering postures and trampled chicks more than mothers of small broods. Chicks in large broods huddled up more whereas chicks in small broods rested alone more frequently. Moreover, the social motivation of chicks in large broods was higher than that of chicks in small broods, although their emotional reactivity levels were similar. Our results evidence the importance of brood size for maintaining family cohesion and the influence of brood size on chicks' interactions with their siblings. We evaluated the influence of mothers and siblings on chicks' behavioural development.
[Mh] Termos MeSH primário: Comportamento Animal
Tamanho da Ninhada
Coturnix/crescimento & desenvolvimento
Comportamento Materno/psicologia
[Mh] Termos MeSH secundário: Animais
Feminino
Masculino
Comportamento Social
Vocalização Animal
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170522
[Lr] Data última revisão:
170522
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170227
[St] Status:MEDLINE


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[PMID]:28062221
[Au] Autor:Poisbleau M; Beaulieu M; Dehnhard N; Demongin L; Lepoint G; Sturaro N; Eens M
[Ad] Endereço:Behavioural Ecology & Ecophysiology Group, Department of Biology, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Antwerp (Wilrijk), Belgium. Electronic address: maud.poisbleau@gmail.com.
[Ti] Título:Extreme intra-clutch egg size dimorphism is not coupled with corresponding differences in antioxidant capacity and stable isotopes between eggs.
[So] Source:Comp Biochem Physiol A Mol Integr Physiol;205:77-85, 2017 Mar.
[Is] ISSN:1531-4332
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Oviparous females need to allocate resources optimally to their eggs in order to maximize their fitness. Among these resources, dietary antioxidants, acquired by females and transferred to the eggs during egg formation, can greatly affect the development and survival of the embryo and chick. In crested penguins, incubation starts after the second and last egg is laid and, as opposed to many other bird species, this egg hatches first, thereby enhancing the survival of the chick. Here, we assessed whether antioxidant and isotopic composition could underlie these differences between eggs within clutches of southern rockhopper penguins (Eudyptes chrysocome chrysocome). The second-laid egg had higher total antioxidant capacity than the first-laid egg, although this was not due to higher antioxidant concentration but to its higher mass. This suggests that resources are allocated by females at a constant rate in both eggs within clutches. Accordingly, we found a strong correlation for isotopic compositions between eggs suggesting that resources were allocated similarly to each egg within the clutch. Overall, we found little evidence for a significant role of antioxidant and isotopic compositions to explain differences in terms of embryo/chick development between eggs in crested penguins. However, since our results suggest a constant rate of antioxidant transfer from females to eggs, limiting the mass of the first-laid egg might represent a strategy for females to spare antioxidant defences and preserve self-maintenance.
[Mh] Termos MeSH primário: Antioxidantes/metabolismo
Óvulo/citologia
Óvulo/metabolismo
Spheniscidae/fisiologia
[Mh] Termos MeSH secundário: Animais
Peso Corporal
Isótopos de Carbono
Tamanho Celular
Tamanho da Ninhada/fisiologia
Feminino
Isótopos de Nitrogênio
Oviparidade/fisiologia
Oviposição/fisiologia
Spheniscidae/embriologia
Spheniscidae/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Carbon Isotopes); 0 (Nitrogen Isotopes)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170717
[Lr] Data última revisão:
170717
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170108
[St] Status:MEDLINE


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[PMID]:28051942
[Au] Autor:Algera DA; Gutowsky LF; Zolderdo AJ; Cooke SJ
[Ti] Título:Parental Care in a Stressful World: Experimentally Elevated Cortisol and Brood Size Manipulation Influence Nest Success Probability and Nest-Tending Behavior in a Wild Teleost Fish.
[So] Source:Physiol Biochem Zool;90(1):85-95, 2017 Jan/Feb.
[Is] ISSN:1537-5293
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Parental care is an advantageous reproductive behavior, as the fitness of the caregiver is increased through improving the chances of its offspring's survival. Parental care occurs in a variety of teleost fishes. The body size of parental fish and the size of their brood can affect nest abandonment decisions, where compared with smaller fish with smaller broods, larger fish with larger broods typically invest more energy into reproductive events because they have less future reproductive potential. Although essential for basal metabolism and body maintenance functions, when glucocorticoid hormones (e.g., cortisol) are chronically elevated, as can occur during stress, fish may experience impairments in behavior and immune function, leading to compromised health and condition. Anthropogenic stressors during parental care can lead to elevated stress, therefore making it necessary to understand how stress influences an already-challenging period. Using smallmouth bass as a model, a gradient of body sizes, and experimentally manipulated brood size (i.e., reducing large broods and supplementing small broods) and cortisol levels (i.e., elevated via slow-release intraperitoneal cocoa butter implants containing cortisol versus controls), we tested the hypothesis that the reproductive success and parental care behaviors (i.e., aggression, nest tending) of nest-guarding male smallmouth bass are influenced by parental body size, brood size, and cortisol level. Overall, there was a relationship between cortisol treatment and nest success in which larger fish exhibited lower success when cortisol levels were elevated. Brood size had a significant effect on fish-tending behavior, independent of cortisol level and body size. Lending partial support to our hypothesis, the results of this study indicate that the reproductive success of guarding male smallmouth bass is influenced by cortisol level and that tending behavior is affected by brood size.
[Mh] Termos MeSH primário: Bass/fisiologia
Hidrocortisona/sangue
Comportamento de Nidação/fisiologia
[Mh] Termos MeSH secundário: Agressão
Animais
Bass/sangue
Tamanho da Ninhada
Feminino
Masculino
Estresse Fisiológico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
WI4X0X7BPJ (Hydrocortisone)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170713
[Lr] Data última revisão:
170713
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170105
[St] Status:MEDLINE
[do] DOI:10.1086/689678


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[PMID]:27896480
[Au] Autor:Sedinger JS; VanDellen AW; Leach AG; Riecke TV
[Ad] Endereço:Department of Natural Resources and Environmental Science, University of Nevada, Reno, 1664 N. Virginia St., Reno, NV, 89557, USA. jsedinger@cabnr.unr.edu.
[Ti] Título:Ultimate regulation of fecundity in species with precocial young: declining marginal value of offspring with increasing brood size does not explain maximal clutch size in Black Brent geese.
[So] Source:Oecologia;183(2):431-440, 2017 Feb.
[Is] ISSN:1432-1939
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Lack 18:125-128 (1967) proposed that clutch size in precocial species was regulated by nutrients available to females during breeding. Drent and Daan 68:225-252 (1980) proposed the individual optimization hypothesis, whereby individual state determines the optimal combination of breeding date and clutch size. Neither hypothesis accounts for variation in nutrients among females at the end of egg laying, strong right truncations in clutch size distributions, or the fact that many species with precocial young are determinate layers. One solution is that there is a maximum clutch size, above which the number of fledged young declines. We manipulated brood size in Black Brent geese to decouple brood size from maternal quality and produce broods larger than the natural maximum. We recaptured marked goslings to assess variation in prefledging survival as a function of brood size and we estimated relative prefledging survival of goslings using a Bayesian hierarchical approach. We considered effects of natural clutch size, brood size and their interaction on probability that we captured goslings at about 4 weeks of age. Prefledging survival declined with increasing brood size ([Formula: see text] = -0.53; 95% CI -0.91 to -0.16), while laid clutch size had little influence on prefledging survival ([Formula: see text] = -0.04; 95% CI -0.42 to 0.32). Despite declining per capita survival with increasing brood size, the most productive brood size was six goslings, which is greater than the typical maximum clutch size of five. Thus, reduced survival in large broods, by itself, is not the sole mechanism that limits maximum clutch size. We suggest elsewhere that incubation limitation and lower residual reproductive value for females tending larger broods may be other mechanisms limiting maximal clutch size in brent.
[Mh] Termos MeSH primário: Tamanho da Ninhada
Gansos
[Mh] Termos MeSH secundário: Animais
Teorema de Bayes
Fertilidade
Reprodução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171010
[Lr] Data última revisão:
171010
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161130
[St] Status:MEDLINE
[do] DOI:10.1007/s00442-016-3772-5


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[PMID]:27894885
[Au] Autor:Rowe CL; Woodland RJ; Funck SA
[Ad] Endereço:University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, PO Box 38, Solomons, 20659, MD, USA. Electronic address: rowe@umces.edu.
[Ti] Título:Metabolic rates are elevated and influenced by maternal identity during the early, yolk-dependent, post-hatching period in an estuarine turtle, the diamondback terrapin (Malaclemys terrapin).
[So] Source:Comp Biochem Physiol A Mol Integr Physiol;204:137-145, 2017 Feb.
[Is] ISSN:1531-4332
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Non-genetic maternal effects, operating through a female's physiology or behavior, can influence offspring traits and performance. Here we examined potential maternal influences on metabolic rates (MR) of offspring in an estuarine turtle, the diamondback terrapin (Malaclemys terrapin). Females and their eggs were collected from the field and the eggs incubated in the laboratory for subsequent measurement of MR of females, late-stage embryos, newly-hatched individuals that were nutritionally dependent on yolk, and older hatchlings that had depleted their yolk reserves and thus were independent of energetic contributions from the female. Female identity significantly affected MR of yolk-dependent hatchlings but, after yolk was depleted, MR of offspring converged and no longer reflected the maternal influence. Offspring from different females also differed in size, which influenced offspring MR and growth, but there was no correlation between female MR or size and offspring traits. MR of the older, yolk-independent hatchlings was lower overall than yolk-dependent hatchlings but correlated positively with growth rates and prior developmental rate (e.g. negatively correlated with time to hatching). Unlike another turtle species (snapping turtles), in which maternally-related differences in offspring MR were retained after yolk depletion, the maternal influence on offspring MR in diamondback terrapins is limited to early hatchling development and growth. The transient nature of the maternal effect, which was present only during the period that hatchlings were metabolizing yolk, suggests that variation among females in the composition of yolk deposited in eggs could be responsible for the differences observed in this study.
[Mh] Termos MeSH primário: Ovos
Metabolismo Energético
Tartarugas/fisiologia
Saco Vitelino
[Mh] Termos MeSH secundário: Animais
Tamanho da Ninhada
Feminino
Crescimento
Tartarugas/embriologia
Tartarugas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170907
[Lr] Data última revisão:
170907
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161130
[St] Status:MEDLINE



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