نتایج جستجو برای: animal migration

تعداد نتایج: 344391  

Journal: :iranian journal of public health 0
m.r.nazari j.massoud l.vedadi

in this paper the histopathological observation of the migratory phase of schistosome larvae (schistosomulae) in the laboratory animal were studied. the first tissue samples were taken from the skin of infected animals 30 minutes after exposure to the cercariae and continued daily up to 40 days post infection. the tissue specimens were taken from skin, liver. lung, lymph nodes, kidney, brain, b...

Journal: :Nature 1955

Journal: :Current Biology 2018

Journal: :Biology letters 2009
Silke Bauer Zoltan Barta Bruno J Ens Graeme C Hays John M McNamara Marcel Klaassen

An international workshop on animal migration was held at the Lorentz Center in Leiden, The Netherlands, 2-6 March 2009, bringing together leading theoreticians and empiricists from the major migratory taxa, aiming at the identification of cutting-edge questions in migration research that cross taxonomic borders.

Journal: :journal of agricultural science and technology 2010
gh. r. rafiee s. hajirezaee

the changes of total calcium content of persian sturgeon, acipenser persicus follicles were investigated during different stages of germinal vesicle migration. total calcium content increased during maturation and ripening of the oocytes i.e. migration of nucleus toward the animal pole. according to data, the total calcium of follicles with polarization index (pi: the ratio of the distance of t...

Journal: :Current Biology 2018

2017
Alexander R Gaos Rebecca L Lewison Michael P Jensen Michael J Liles Ana Henriquez Sofia Chavarria Carlos Mario Pacheco Melissa Valle David Melero Velkiss Gadea Eduardo Altamirano Perla Torres Felipe Vallejo Cristina Miranda Carolina LeMarie Jesus Lucero Karen Oceguera Didiher Chácon Luis Fonseca Marino Abrego Jeffrey A Seminoff Eric E Flores Israel Llamas Rodrigo Donadi Bernardo Peña Juan Pablo Muñoz Daniela Alarcòn Ruales Jaime A Chaves Sarah Otterstrom Alan Zavala Catherine E Hart Rachel Brittain Joanna Alfaro-Shigueto Jeffrey Mangel Ingrid L Yañez Peter H Dutton

The complex processes involved with animal migration have long been a subject of biological interest, and broad-scale movement patterns of many marine turtle populations still remain unresolved. While it is widely accepted that once marine turtles reach sexual maturity they home to natal areas for nesting or reproduction, the role of philopatry to natal areas during other life stages has receiv...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2011
Wen-Xu Wang Xuan Ni Ying-Cheng Lai Celso Grebogi

Species in nature are typically mobile over diverse distance scales, examples of which range from bacteria run to long-distance animal migrations. These behaviors can have a significant impact on biodiversity. Addressing the role of migration in biodiversity microscopically is fundamental but remains a challenging problem in interdisciplinary science. We incorporate both intra- and inter-patch ...

Journal: :Conservation Physiology 2016

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