Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Biological Clocks and Seasonal Responses02:45

Biological Clocks and Seasonal Responses

The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response01:15

Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response

Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Lunar gravity predicts sleep timing.

bioRxiv : the preprint server for biology·2026
Same author

Daily ultrastructural remodeling of clock neurons.

Current biology : CB·2025
Same author

Lunar rhythms in sleep patterns of children with a family history of autism.

Sleep·2025
Same author

Lunar rhythmicity in the actigraphic sleep patterns of older adults with chronic pain and sleep disturbances is associated with the severity of their self-reported sleep disturbance.

Sleep·2025
Same author

Modern Times: Longitudinal Study of Toba/Qom Communities Reveals Delay and Shortening of Sleep in Real-Time Across Electrification.

bioRxiv : the preprint server for biology·2025
Same author

Sleep Identification Enabled by Supervised Training Algorithms (SIESTA): An Open-Source Platform for Automatic Sleep Staging of Rodent Electrocorticographic and Electromyographic Data.

Journal of biological rhythms·2025

Related Experiment Video

Updated: Jun 12, 2026

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
06:53

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

Published on: November 11, 2016

Biological clocks and rhythms in intertidal crustaceans.

Horacio O de la Iglesia1, Yun-Wei A Hsu

  • 1Department of Biology and Friday Harbor Laboratories, University of Washington, Box 351800, Seattle, Washington 98195-1800, USA.

Frontiers in Bioscience (Elite Edition)
|June 3, 2010
PubMed
Summary

Intertidal animals possess biological clocks for tidal cycles. Research reviews classic crustacean studies and explores chemical signals for circatidal rhythms, enhancing our understanding of these biological timing systems.

More Related Videos

Monitoring Cell-autonomous Circadian Clock Rhythms of Gene Expression Using Luciferase Bioluminescence Reporters
10:38

Monitoring Cell-autonomous Circadian Clock Rhythms of Gene Expression Using Luciferase Bioluminescence Reporters

Published on: September 27, 2012

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents
05:46

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents

Published on: January 24, 2013

Related Experiment Videos

Last Updated: Jun 12, 2026

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
06:53

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

Published on: November 11, 2016

Monitoring Cell-autonomous Circadian Clock Rhythms of Gene Expression Using Luciferase Bioluminescence Reporters
10:38

Monitoring Cell-autonomous Circadian Clock Rhythms of Gene Expression Using Luciferase Bioluminescence Reporters

Published on: September 27, 2012

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents
05:46

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents

Published on: January 24, 2013

Area of Science:

  • * Chronobiology and animal behavior
  • * Marine biology and ecology

Background:

  • * Intertidal organisms face complex environmental cycles including tides, lunar phases, and seasons.
  • * Biological timing systems with endogenous clocks are selected to match these periodicities.
  • * Circadian rhythms (solar day) are well-understood, but circatidal rhythms (tidal cycles) remain poorly understood.

Purpose of the Study:

  • * To review classic studies on intertidal crustaceans demonstrating the endogenous nature of circatidal rhythms.
  • * To explore mechanisms of entrainment for circatidal systems.
  • * To present research identifying potential chemical signals involved in circatidal systems of decapod crustaceans.

Main Methods:

  • * Review of historical and foundational research on circatidal rhythms in intertidal crustaceans.
  • * Analysis of experimental data from studies on crustacean biological timing.
  • * Investigation into putative chemical signaling pathways in decapod crustaceans.

Main Results:

  • * Intertidal crustaceans are key models for understanding endogenous circatidal rhythms.
  • * Classic work established fundamental properties of circatidal systems and entrainment.
  • * Ongoing research aims to identify specific chemical signals mediating these rhythms.

Conclusions:

  • * Circatidal rhythms are crucial for intertidal animal adaptation.
  • * Intertidal crustaceans provide valuable insights into the generation and entrainment of these rhythms.
  • * Further research into chemical signals is needed to fully elucidate circatidal timing mechanisms.