Enigmatic headstands in European freshwater fish species

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F25%3A00646906" target="_blank" >RIV/60077344:_____/25:00646906 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/ece3.71005" target="_blank" >https://doi.org/10.1002/ece3.71005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/ece3.71005" target="_blank" >10.1002/ece3.71005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enigmatic headstands in European freshwater fish species

Popis výsledku v původním jazyce

This study discloses a remarkable and rarely documented behavior among two cyprinid species-the common bleak (Alburnus alburnus) and the common roach (Rutilus rutilus)-and one percid species, the European perch (Perca fluviatilis). The primary aim was to reevaluate this distinct behavior, termed 'headstand', and explore its potential implications for fish behavior and ecology. We utilized video recording to observe and analyze this behavior. Fish were monitored in an enclosure with near-natural conditions. Instances of headstanding behavior-where fish assume a head-down posture at angles between 45 degrees and 90 degrees-were documented. The video analysis revealed the occurrence of headstanding behavior in all three species, lasting from a few seconds to over a minute. This behavior was observed both individually and in groups, sometimes involving multiple species simultaneously. Group headstands occurred more frequently in the year when water transparency was low. Interestingly, although this behavior was previously proposed as a cleaning signal, no cleaning activity was observed afterward. Our observations suggest that headstanding may serve additional functions beyond a cleaning context, potentially involving foraging, predator avoidance, or social communication. Observing this behavior under diverse conditions highlights its ecological and social relevance. Future work integrating behavioral, ecological, and physiological approaches could clarify the adaptive significance of headstanding employed by these species.

Název v anglickém jazyce

Enigmatic headstands in European freshwater fish species

Popis výsledku anglicky

This study discloses a remarkable and rarely documented behavior among two cyprinid species-the common bleak (Alburnus alburnus) and the common roach (Rutilus rutilus)-and one percid species, the European perch (Perca fluviatilis). The primary aim was to reevaluate this distinct behavior, termed 'headstand', and explore its potential implications for fish behavior and ecology. We utilized video recording to observe and analyze this behavior. Fish were monitored in an enclosure with near-natural conditions. Instances of headstanding behavior-where fish assume a head-down posture at angles between 45 degrees and 90 degrees-were documented. The video analysis revealed the occurrence of headstanding behavior in all three species, lasting from a few seconds to over a minute. This behavior was observed both individually and in groups, sometimes involving multiple species simultaneously. Group headstands occurred more frequently in the year when water transparency was low. Interestingly, although this behavior was previously proposed as a cleaning signal, no cleaning activity was observed afterward. Our observations suggest that headstanding may serve additional functions beyond a cleaning context, potentially involving foraging, predator avoidance, or social communication. Observing this behavior under diverse conditions highlights its ecological and social relevance. Future work integrating behavioral, ecological, and physiological approaches could clarify the adaptive significance of headstanding employed by these species.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10614 - Behavioral sciences biology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ecology and Evolution

ISSN

2045-7758

e-ISSN

2045-7758

Svazek periodika

15

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

e71005

Kód UT WoS článku

001421410400001

EID výsledku v databázi Scopus

2-s2.0-85218929242