Migration and orientation in anuran amphibians

Sinsch, Ulrich

doi:10.1080/08927014.1990.9525494

Cited by 302 publications

(217 citation statements)

References 57 publications

Supporting

Mentioning

206

Contrasting

Unclassified

Order By: Relevance

“…In amphibians, the lymphocyte diameter varies between 10 and 25 µm in most species (WRIGHT, 1996;HEATLEY;JOHNSON, 2009;ARIKAN et al, 2010;CAMPBELL, 2012). The mean lymphocyte diameters of Scinax and Hypsiboas genera (8.33 ± 0.59 and 8.82 ± 0.99 µm, respectively) were similar to those of balloon frogs (Glyphogloossus molossus, 8.56 ± 2.74 μm, range 7.74 -11.30 µm) (SINSCH, 1990).…”

Section: Discussionsupporting

confidence: 51%

“…However, the South American genera presented few morphometric similarities, as shown in table 1. Our results suggest that the geographical separation between the North American genus and the six South American genera could possibly have influenced a certain differentiation in leukocyte morphometry, once the migratory behavior of anuran amphibians consists of short-distance or microgeographic dislocations, generally not longer than 1500 m, and site fidelity to these spatial units (SINSCH, 1990;RUSSELL et al, 2005). Further research in the field of amphibian hematology is needed to better characterize the Brazilian species.…”

Section: Resultsmentioning

confidence: 91%

See 1 more Smart Citation

Comparative leukocyte morphometric analysis between endemic Anurans from Brazil and the invasive species Lithobates catesbeianus

Silva

Ewbank

Strefezzi

et al. 2017

Braz. J. Vet. Res. Anim. Sci.

View full text Add to dashboard Cite

Amphibians are potentially reliable and efficient bioindicators. Existing anuran white blood cell morphology studies are limited, with only a few morphometric studies available. We employed morphometric techniques to characterize leukocytes of selected Neotropical anurans from Brazil and compare our findings with the exotic American Bullfrog (Lithobates catesbeianus), genus Ranidae. We compared blood smears of 28 specimens from six different genera (Hyla, Phyllomedusa, Hypsiboas, Scinax, Physalaemus, and Proceratophrys) with samples from L. catesbeianus. Leukocyte average diameter was calculated by an image analysis software. One-way analyses of variance and Bonferroni tests were used on statistical analyses. Lymphocytes, neutrophils, eosinophils, and basophils were significantly smaller than the reference ranges reported for other amphibian genera, including Lithobathes, whereas monocyte diameters did not differ significantly between genera. This is the first study to evaluate leukocyte morphometrics of Brazilian anuran species. Our findings suggest that geographical separation could possibly influence leukocyte morphometry. Keywords: Anura. Morphometry. South America. White blood cells. ResumoAnfíbios são indicadores ambientais potencialmente confiáveis e eficientes. Estudos referentes à morfologia de leucócitos de anuros são limitados, com poucos estudos morfométricos disponíveis em literatura. O presente estudo empregou técnicas morfométricas para caracterizar leucócitos de anuros Neotropicais brasileiros selecionados e compará-los com a espécie exótica rã-touro (Lithobates catesbeianus), família Ranidae. Esfregaços sanguíneos de 28 espécimes pertencentes a seis gêneros diferentes (Hyla, Phyllomedusa, Hypsiboas, Scinax, Physalaemus e Proceratophrys) foram comparados com amostras de esfregaços de L. catesbeianus. A média do diâmetro dos leucócitos foi calculada por um software de análise de imagens. One-way e teste de Bonferroni foram utilizados para avaliação estatística. Linfócitos, neutrófilos, eosinófilos e basófilos mostraram-se significativamente menores que os valores de referência reportados em outros gêneros de anfíbios, incluindo Lithobathes; por outro lado, a média do diâmetro dos monócitos não demonstrou variação significativa entre os gêneros. Esse é o primeiro estudo de avaliação morfométrica de leucócitos em espécies de anuros brasileiros. Nossos resultados sugerem que a separação geográfica possivelmente influencia a morfometria leucocitária. Palavras-chave: Anura. Morfometria. América do Sul. Leucócitos. | 160Braz.

show abstract

Section: Discussionsupporting

confidence: 51%

Section: Resultsmentioning

confidence: 91%

Comparative leukocyte morphometric analysis between endemic Anurans from Brazil and the invasive species Lithobates catesbeianus

Silva

Ewbank

Strefezzi

et al. 2017

Braz. J. Vet. Res. Anim. Sci.

View full text Add to dashboard Cite

show abstract

“…가 중요할 뿐만 아니라 번식 (Sinsch, 1990;Lee, 2009) (Gibbons et al, 1977;Kofron, 1978;Semlitsch et al, 따라서 산악지역에 위치한 계곡 1998;Bodie, 2001). …”

Section: 중 양서류의 도롱뇽과 개구리는 수분균형(Water 을 위해 주변에 분포하고 있는 수자원의 유무 Balance)unclassified

Distribution pattern according to altitude and habitat type of the Red-tongue viper snake (Gloydius ussuriensis) in the Cheon-ma mountain

Seock¹,

Yoo²

2014

Journal of Wetlands Research

View full text Add to dashboard Cite

The distribution of animals is affected by habitat selection, and habitat type and prey resource are important factors affecting their survival. This study was conducted to investigate the distribution pattern of the Red-tongue viper snake (Gloydius ussuriensis) with respect to altitude, habitat type and distribution of potential prey resource in Cheon-ma mountain, Korea. The study area of Cheon-ma mountain was separated into three altitude categories (low, middle, and high altitude) and the habitat types were categorized according to presence or absence of aquatic ecosystem and the preferred habitat in relation to altitude was determined. The distribution pattern of Red-tongue viper snakes was significantly different according to altitude and habitat type: they were mainly distributed at low altitude and in the water valleys. The distribution pattern of the Red-tongue viper snake correlated with that of amphibians. The analyses of microhabitat use of the Red-tongue viper snake and amphibians showed that their microhabitat types were not different significantly in water valleys. In conclusion, Red-tongue viper snakes were mainly distributed in the water valleys at low altitude and this is because amphibians are important as potential prey of the Red-tongue viper snake in Cheon-ma mountain.

show abstract

“…Adult frogs show a high degree of site fidelity and often use the same breeding pond and summer habitat from year to year (Loman 1994). Long distance dispersal in Moor frogs takes place predominantly during the juvenile life-stage (Semlitsch 2008;Sinsch 1990;2006). Shortly after metamorphosis, the young frogs leave the natal pond and disperse into the surrounding landscape seeking out suitable summer habitat.…”

Section: Model Speciesmentioning

confidence: 99%

Changes in behavioural responses to infrastructure affect local and regional connectivity – a simulation study on pond breeding amphibians

Pontoppidan

Nachman²

2013

View full text Add to dashboard Cite

An extensive and expanding infrastructural network destroys and fragments natural habitat and has detrimental effect on abundance and population viability of many amphibian species. Roads function as barriers in the landscape. They separate local populations from each other or prevent access to necessary resources. Therefore, road density and traffic intensity in a region may have severe impact on regional as well as local connectivity. Amphibians may be able to detect and avoid unsuitable habitat. Individuals' ability to avoid roads can reduce road mortality but at the same time road avoidance behaviour, can increase the barrier effect of the road and reduce connectivity. We use an individual based model to explore how changes in road mortality and road avoidance behaviour affect local and regional connectivity in a population of Moor frogs (Rana arvalis). The results indicate that road mortality has a strong negative effect on regional connectivity, but only a small effect on local connectivity. Regional connectivity is positively affected by road avoidance and the effect becomes more pronounced as road mortality decreases. Road avoidance also has a positive effect on local connectivity. When road avoidance is total and the road functions as a 100% barrier regional connectivity is close to zero, while local connectivity exhibit very elevated values. The results suggest that roads may affect not only regional or metapopulation dynamics but also have a direct effect on local population dynamics.

show abstract

Migration and orientation in anuran amphibians

Cited by 302 publications

References 57 publications

Comparative leukocyte morphometric analysis between endemic Anurans from Brazil and the invasive species Lithobates catesbeianus

Comparative leukocyte morphometric analysis between endemic Anurans from Brazil and the invasive species Lithobates catesbeianus

Distribution pattern according to altitude and habitat type of the Red-tongue viper snake (Gloydius ussuriensis) in the Cheon-ma mountain

Changes in behavioural responses to infrastructure affect local and regional connectivity – a simulation study on pond breeding amphibians

Contact Info

Product

Resources

About