US-Brazil Cooperative Research: Gut Microclimate in Neotropical Armored Catfish (Loricariidae)

美国-巴西合作研究：新热带装甲鲶鱼（Loricariidae）的肠道微气候

• 批准号: 0086474
• 负责人: Jay Nelson
• 金额: $ 1.24万
• 依托单位: Towson University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0086474&HistoricalAwards=false
• 关键词: US; Brazil; Cooperative; Research; Gut

This Americas Program award will support a US-Brazil research project between Dr. Jay A. Nelson, Towson University, and Dr. Francisco Tadeu Rantin, Federal University of Sao Paulo. The goal of the project is to investigate the digestive system and gut environment of the loricariid catfish. These researchers will use large loricariids to test the null hypothesis that the lumen of the loricariid gastrointestinal tract is anaerobic as in other vertebrates. They will investigate the environment of the gastrointestinal tract and the blood draining it in animals that are breathing either water only or both water and air.Unlike the guts of most animals, which are highly anaerobic, loricariid catfishes use their digestive tracts to uptake oxygen from air gulped in with water, so that the gut may be an aerobic environment. Our current understanding of the digestive physiology of herbivorous fishes is poor, and given the evidence that loricariids have a strange and unique digestive physiology, it is important that we broaden this knowledge. In this work Nelson will combine his knowledge of respiratory physiology with Rantin's capabilities for studying the physiology of large loricariids. The results of this study should aid in understanding the respiration and digestion of these fish, which constitute a highly diverse and ecologically important group of herbivorous fishes that has received little scientific attention.

该美洲项目奖将支持陶森大学的Jay a . Nelson博士和圣保罗联邦大学的Francisco Tadeu Rantin博士之间的一个美国-巴西研究项目。该项目的目的是研究喉纲鲶鱼的消化系统和肠道环境。这些研究人员将使用大型门螺虫来验证零假设，即门螺虫胃肠道的管腔与其他脊椎动物一样是厌氧的。他们将调查那些只呼吸水或既呼吸水又呼吸空气的动物的胃肠道环境和排泄它的血液。与大多数动物的肠道高度厌氧不同的是，loricariid鲶鱼利用它们的消化道从被水吞没的空气中吸收氧气，因此肠道可能是一个有氧环境。我们目前对草食性鱼类的消化生理的了解很少，并且有证据表明loricariids具有一种奇怪而独特的消化生理，因此我们拓宽这方面的知识是很重要的。在这项工作中，Nelson将把他的呼吸生理学知识与Rantin研究大型loricariids生理学的能力结合起来。本研究的结果应该有助于理解这些鱼类的呼吸和消化，这些鱼类构成了高度多样化和生态重要的草食性鱼类，但很少受到科学关注。