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

Fixed Action Patterns01:06

Fixed Action Patterns

16.0K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
16.0K
Testing a Claim about Mean: Known Population SD01:11

Testing a Claim about Mean: Known Population SD

2.7K
A complete procedure of testing the hypothesis about a population mean is explained here.
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
2.7K

You might also read

Related Articles

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

Sort by
Same author

Male Agonistic Behavior on Atlantic Cod Spawning Grounds.

Ecology and evolution·2026
Same author

Physiological responses in sea trout to repeated salmon louse infections and freshwater.

Conservation physiology·2025
Same author

Contrasting management regimes indicative of mesopredator release in temperate coastal fish assemblages.

Ecology and evolution·2023
Same author

Atlantic cod individual spatial behaviour and stable isotope associations in a no-take marine reserve.

The Journal of animal ecology·2023
Same author

Occurrence of salmonid alphavirus and piscine orthoreovirus-1 infections in migrating salmon (Salmo salar L.) post-smolt in western Norway.

Journal of fish diseases·2023
Same author

Eco-evolutionary dynamics of Atlantic cod spatial behavior maintained after the implementation of a marine reserve.

Evolutionary applications·2022

Related Experiment Video

Updated: Jul 9, 2025

A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters Homarus americanus
10:18

A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters Homarus americanus

Published on: February 7, 2014

11.0K

Large females connect Atlantic cod spawning sites.

Esben Moland Olsen1,2, Ørjan Karlsen3, Jon Egil Skjæraasen3

  • 1Institute of Marine Research; Flødevigen, Arendal 4817, Norway.

Science (New York, N.Y.)
|December 7, 2023
PubMed
Summary

Large Atlantic cod (Gadus morhua) females exhibit complex movement patterns, crucial for maintaining diverse spawning habitats and connectivity. Protecting large fish enhances ecosystem resilience and biodiversity.

More Related Videos

Silencing the Spark: CRISPR/Cas9 Genome Editing in Weakly Electric Fish
08:00

Silencing the Spark: CRISPR/Cas9 Genome Editing in Weakly Electric Fish

Published on: October 27, 2019

10.0K
Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria
07:25

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

Published on: July 20, 2017

11.6K

Related Experiment Videos

Last Updated: Jul 9, 2025

A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters Homarus americanus
10:18

A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters Homarus americanus

Published on: February 7, 2014

11.0K
Silencing the Spark: CRISPR/Cas9 Genome Editing in Weakly Electric Fish
08:00

Silencing the Spark: CRISPR/Cas9 Genome Editing in Weakly Electric Fish

Published on: October 27, 2019

10.0K
Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria
07:25

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

Published on: July 20, 2017

11.6K

Area of Science:

  • Marine Biology
  • Ecology
  • Fisheries Science

Background:

  • Ecosystems are losing large animals, impacting biosphere functioning.
  • Historical data on the ecological importance of large animals is scarce.
  • Atlantic cod (Gadus morhua) populations face challenges from downsizing.

Purpose of the Study:

  • To investigate the ecological role of large Atlantic cod females.
  • To understand how fish size influences movement patterns and habitat use.
  • To provide empirical data on the importance of large individuals for population resilience.

Main Methods:

  • Tracking of 465 mature Atlantic cod (Gadus morhua) during their winter spawning season.
  • Analysis of movement networks based on fish length.
  • Comparison of movement complexity between large and small female cod.

Main Results:

  • Large female Atlantic cod (up to 114 cm) displayed more complex movement networks than smaller females.
  • Large males were rare but showed similar movement patterns.
  • Movement complexity is linked to the use of diverse spawning habitats and connectivity.

Conclusions:

  • Management strategies promoting larger fish are essential for Atlantic cod population resilience.
  • Conserving large individuals facilitates the use of critical spawning grounds and maintains ecosystem connectivity.
  • The findings highlight the ecological significance of large fish in marine ecosystems.