IMR_2025_Atlantic_cod_behaviour

Male agonistic behaviour on Atlantic cod spawning grounds

Dataset Creator	Dataset Title	Dataset Release Date	Dataset Publisher	Dataset DOI	Online Resource
Jon Egil Skjæraasen, Karen de Jong, Kate McQueen, Lise Doksæter	Male agonistic behaviour on Atlantic cod spawning grounds	2025-10-24T00:00:00:00Z	Institute of Marine Research	10.21335/NMDC-1068069161	http://metadata.nmdc.no/metadata-api/landingpage/3901e3b133e1682b024bdf274c777e5e

Role	First Name	Last Name	Email
DIF Author	Arnfinn	Morvik	arnfinn.morvik@hi.no
Investigator	Jon Egil	Skjæraasen
Technical Contact	Karen	de Jong
Technical Contact	Kate	McQueen
Technical Contact	Lise	Doksæter

Category	Topic	Term	Variable Level 1	Variable Level 2	Variable Level 3
EARTH SCIENCE	BIOLOGICAL CLASSIFICATION	ANIMALS/VERTEBRATES	FISH	RAY-FINNED FISHES	CODS/HADDOCKS
EARTH SCIENCE	OCEANS	AQUATIC SCIENCES

Oceans

Gadus morhua,leks,gadoids,mating system,sexual selection,aggression,spawning,telemetry,accellerometer

Start Date	Stop Date
2019-02-01	2024-06-07

Complete

Location Category	Location Type	Location Subregion1
Ocean	Atlantic Ocean	North Atlantic Ocean

unrestricted

Institute of Marine Research

Data Center Name	Personnel	Data Center URL
Institute of Marine Research, Norwegian Marine Data Center Institute of Marine Research, Norwegian Marine Data Center	Datacenter Arnfinn Morvik arnfinn.morvik@hi.no
NO/IMR Institute of Marine Research	Originating institution Jon Egil Skjæraasen	http://www.imr.no

Distribution Media	Distribution Format
ftp	csv

The cod mating system has been described as a lek, a system where male- male aggressions are expected. However, observing aggressions directly in marine environments is challenging. So far, the evidence supporting the importance of male – male aggressions for cod is mainly derived from laboratory studies with fish kept in close confinement, possibly elevating aggression levels and the perceived importance of such interactions. In natural aquatic systems, agonistic interactions between individuals may be inferred from acoustic telemetry transmitters fitted with accelerometers, given that such interactions are associated with high activity levels. We show that male-male agonistic interactions, as inferred from activity levels, are present on natural spawning grounds for Atlantic cod, especially in deeper waters, albeit at reduced levels compared to the levels exhibited in net - pen confinement. We hypothesize that the heightened activity levels of males compared to females when occupying deeper waters is related to the overall deeper distribution of males and territorial and agonistic behaviour at these depths, agreeing with the lek - description of the cod mating system.

URL Content Type	URL
GET DATA	https://ftp.nmdc.no/nmdc/IMR/CodMating/Accel_Data_Bakka_Sub.csv
GET DATA	https://ftp.nmdc.no/nmdc/IMR/CodMating/Accel_Data_Osen_Sub.csv
GET DATA	https://ftp.nmdc.no/nmdc/IMR/CodMating/Net_Pen_Accell_sub.csv
VIEW RELATED INFORMATION	https://ftp.nmdc.no/nmdc/IMR/CodMating/Input_file_descriptions.docx
VIEW RELATED INFORMATION	https://ftp.nmdc.no/nmdc/IMR/CodMating/Accell_Analyses_sub2.R
VIEW RELATED INFORMATION	https://ftp.nmdc.no/nmdc/IMR/CodMating/Accell_Analyses_sub_revision_fin_2.R

Norwegian Marine Datacentre

CEOS IDN DIF

9.7.1

2025-10-24T00:00:00:00Z

CC BY 4.0

POLYGON((5.127879 59.91844,5.162553 59.91844,5.162553 60.24091,5.127879 60.24091,5.127879 59.91844))