Ecology | VOL. 47
Read

Floating in Hydra Littoralis

Publication Date Nov 1, 1966

Abstract

Starved or poorly fed Hydra will produce a bubble and float to the surface of the medium. Richly fed Hydra will not. The fraction of Hydra that will float is related to the degree to which they are crowded by other Hydra. Water which has been conditioned by either starved or well—fed Hydra will elicit floating. Excessively crowded animals are less effective in eliciting floating than are less crowded animals. Laboratory populations from which floating animals are periodically removed come to a steady state with approximately one—seventh as many animals as in confined populations with the same food supply. The implication of these phenomena is that Hydra in nature are relatively mobile within a lake. The evolution of the floating mechanism in Hydra does not require group selection, but it does illustrate the danger of an overemphasis on abundance as a criterion of adaptive success. See full-text article at JSTOR

Concepts

Hydra Littoralis Crowded Animals Full-text Article Laboratory Populations Food Supply Criterion Of Success Steady State

Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.

Climate change Research Articles published between Jan 23, 2023 to Jan 29, 2023

R DiscoveryJan 30, 2023
R DiscoveryArticles Included:  3

Climate change adaptation has shifted from a single-dimension to an integrative approach that aligns with vulnerability and resilience concepts. Adapt...

Read More

Coronavirus Pandemic

You can also read COVID related content on R COVID-19

R ProductsCOVID-19

ONE PROBLEM . ONE PURPOSE . ONE PLACE

Creating the world’s largest AI-driven & human-curated collection of research, news, expert recommendations and educational resources on COVID-19

COVID-19 Dashboard

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on “as is” basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The Copyright Law.