奇谭趣文。大鱼吃小鱼，小鱼吃虾米，虾米吃虫子？

龙血树

https://www.sciencedaily.com/releases/2018/08/180823092057.htm

Shrimp heal injured fish
Date:
August 23, 2018
Source:
James Cook University
Summary:
Scientists have discovered that shrimp help heal injured fish.
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Cleaner shrimp.
Credit: Image courtesy of James Cook University
James Cook University scientists in Australia have discovered that shrimp help heal injured fish.

PhD student David Vaughan is working on a project led by Dr Kate Hutson at JCU's Centre for Sustainable Tropical Fisheries and Aquaculture.

He said it was important to know how the shrimp interact with fish, as the team is in the process of identifying the best shrimp species to use to clean parasites from farmed and ornamental fish.

"Between 30 -- 50% of farmed fish in Southeast Asia, the largest fish producing region in the world, are lost to parasites.

"We know that shrimp clean parasites from fish and if we can identify a species that does it efficiently, and does no harm, it offers a 'greener' alternative to chemicals," he said.

Mr Vaughan said scientists knew injured fish visited shrimp 'cleaning stations' to have parasites removed -- but the question was whether shrimp then took advantage of the injured fish and fed on their wounds. He said the relationship between cleaner shrimp and their client fish was complicated, with the shrimp known to eat the mucus of the fish and the fish occasionally eating the shrimp.

The scientists used high-definition cameras to record the details of the interaction between the species. "We found that shrimp did not aggravate existing injuries or further injure the fish," said Mr Vaughan.

He said image analyses showed the cleaner shrimp actually reduced the redness of the injury. "Injuries in fishes are susceptible to invasion by secondary pathogens like viruses and bacteria, and the reduction in redness by shrimp indicates that cleaner shrimp could reduce infections."

Mr Vaughan said cleaner shrimp are also known to indirectly influence the health of client fishes by reducing stress levels as a function of cleaning -- which also increased the ability of the fish to heal.

Story Source:

Materials provided by James Cook University. Note: Content may be edited for style and length.

Journal Reference:

David B. Vaughan, Alexandra S. Grutter, Hugh W. Ferguson, Rhondda Jones, Kate S. Hutson. Cleaner shrimp are true cleaners of injured fish. Marine Biology, 2018; 165 (7) DOI: 10.1007/s00227-018-3379-y

龙血树

大鱼吃小鱼，小鱼吃虾米，虾米吃虫子， 虫子吃鱼

圣母虾米

科学家们在研究最擅长为鱼类清除寄生虫的大虾（侠）们，还研究鱼患者、虾医生如何交流。 发现经过虾医生处理后，伤鱼的创口的红肿减退

——生态治理来代替化学制剂的研究

propane

这段时间龙教授对科技比较关注啊

龙血树

propane 发表于 2018-8-26 17:18
这段时间龙教授对科技比较关注啊

边看边灌水

lorry

Fascinating.