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Sturgeon, long-lived, bottom-dwelling fish, are often described as living fossils. Their form has remained relatively constant, despite hundreds of millions of years of evolution.In a National Sc...
Polypterids are weird and puzzling African fish that have perplexed biologists since they were discovered during Napoleon's expedition to Egypt in the late 1700s.Often called living fossils, these eel...
EVANSTON - A provocative new Northwestern University and Claremont McKenna, Scripps and Pitzer colleges study suggests it was the power of the eyes and not the limbs that first led our ancient aquatic...
Large bedrock landslides have been shown to modulate rates and processes of river activity by forming dams, forcing upstream aggradation of water and sediment, and generating catastrophic outburst flo...
Additional morphological and histological features of a stem-group sarcopterygian fish Meemannia eos (Zhu et al. 2006) are provided, including dermal bone features, endocranial structures in the o...
取大辽河入海口柱状沉积物,通过寡核苷酸荧光探针原位杂交(FISH)方法分析了沉积物中微生物数量及种群的垂直分布特征,并考察了沉积物理化特性对微生物丰度的影响.结果表明,用5-(4,6-二氯三嗪基)氨基荧光素(简称DTAF)染料染色及EUB338探针杂交检测出的微生物细胞总数及细菌数量随沉积物深度呈现相同变化趋势.在沉积物表层(0~5cm)和中间层(23.5~29.5cm)数量相对较高.细胞总数为7...

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