نتایج جستجو برای: mollusc
تعداد نتایج: 1325 فیلتر نتایج به سال:
Effects of serotonin, dopamine and ergometrine on locomotion in the pulmonate mollusc Helix lucorum.
The terrestrial snail Helix lucorum crawls using waves of muscular contraction (pedal waves) that spread along the sole of its foot. Crawling speed depends on wave generation frequency (step frequency) and the distance the snail moves forwards during each wave (step length). In a previous study, video recordings of a crawling snail showed that its sole length varied over a wide range and was di...
Abstract Mollusc communities are getting endangered in the aftermath of urban sprawl because artificial structures do not surrogate natural substrates. In this study, we compared diversity, community and trophic arrangements molluscs among different models substrate their adjacent rock, to detect relationships between some abiotic variables mollusc communities. Complexity, chemical composition ...
In order to clarify the origin of Paralytic Shellfish Toxins occurring in the ormers, Haliotis tuberculata, various studies were conducted to describe toxicity distribution by area, length and parts of the mollusc. Ormer toxicity from different locations of the Galician coast had a confidence interval of 252±25 μg STX eq/100 g of meat (μg of equivalents of saxitoxin/100 g) by mouse bioassay ana...
The adhesion of six fouling organisms: the barnacle Balanus eburneus, the gastropod mollusc Crepidulafornicata, the bivalve molluscs Crassostrea virginica and Ostrea/Dendrostrea spp., and the serpulid tubeworms Hydroides dianthus and H. elegans, to 12 silicone fouling-release surfaces was examined. Removal stress (adhesion strength) varied among the fouling species and among the surfaces. Princ...
Two interconnected kernels of reciprocally inhibitory interneurons underlie alternating left-right swim 1 motor pattern generation in the mollusc Melibe leonina 2 3 Akira Sakurai, Charuni A. Gunaratne, and Paul S. Katz 4 5 Running head: Swim central pattern generator of the mollusc Melibe leonina 6 7 8 Acknowledgements: The authors thank anonymous reviewers for valuable comments and discussions...
We studied representatives of seven vetigastropod families in an extremely well-preserved Plio-Pleistocene mollusc fauna found in relatively deep water sediments (c. 200-300 m paleodepth) from the north-western Philippines. The fauna is systematically described and its paleoenvironmental and paleobiogeographical character is explored. Twenty-six species of gastropods were studied, three of whic...
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