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Assessment of locomotion behavioral defects induced by acute toxicity from heavy metal exposure in nematode Caenorhabditis elegans

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Journal of Environmental Sciences 2008年第9期20卷 1132-1137页

作者： WANG Dayong XING Xiaojuan Key Laboratory of Developmental Genes and Human Disease Ministry of Education Southeast University Medical School Nanjing 210009 China Department of Genetics and Developmental Biology Southeast University Nanjing 210009 China

locomotion behaviors are susceptible to disruption by a broad spectrum of chemicals and environmental stresses. However, no systematic testing of locomotion behavior defects induced by metal exposure has been conducted in the model organism of nematode Caenorhabditis elegans. In this study, the acute toxicity from heavy metal exposure on the locomotion behaviors was analyzed in nematodes. Endpoints of head thrash, body bend, forward turn, backward turn, and Omega/U turn were chosen to evaluate the locomotio...

关键词： locomotion behavior heavy metal acute exposure C. elegans

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New Dinosaur Tracks from the Lower Barremian of Portugal (Areia do Mastro Formation, Cape Espichel)

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Journal of Geoscience and Environment Protection 2021年第1期9卷 84-96页

作者： Silvério D. Figueiredo Carlos Neto de Carvalho Pedro P. Cunha Ismar de Sousa Carvalho Instituto Politécnico de Tomar CGeo-UC Unidade Departamental de Arqueologia Conserva&ccedil ã o e Restauro e Património Quinta do Contador-Estrada da Serra Tomar Portugal Serviç o de Geologia do Município de Idanha-a-Nova Geopark Naturtejo Mundial da UNESCO Avenida Joaquim Mor&atilde o Idanha-a-Nova IDL Instituto Dom Luiz Faculdade de Ciências da Universidade de Lisboa Campo Grande Lisboa Universidade de Coimbra MARE Dep. Ciências da Terra R. Sílvio Lima Coimbra Portugal Universidade Federal do Rio de Janeiro Instituto de Geociências CCMN Cidade Universitária Ilha do Fund&atilde o Rio de Janeiro Brasil

We present a new tracksite with multiple dinosaur tracks from the lowermost Barremian (Lower Cretaceous) of the Cape Espichel (Sesimbra, Portugal). The tracks are localized on three beds on the top carbonate beds of the Areia do Mastro Formation. Those bioclastic, nodular limestones were deposited in a very shallow subtidal-intertidal, restricted lagoon environment. The track surfaces are very dinoturbated, with a substantial number of tracks. Several tracks assign to sauropods, ornithopods and theropods dinosaurs were recorded. Due to heavy bioturbation and the preservation conditions, it is not possible to define trackways;some preliminary work done on the tracks could disclose some behaviours of their producers. Several species of carnivore and herbivore dinosaurs crossed that large area at different times. Herbivores may have used the lagoon margin as passage between feeding spots, while carnivores frequented the area to hunt in groups or individually.

关键词： Trampled Surface Dinosaurs locomotion behavior Lower Cretaceous Cape Espichel Portugal Iberia

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