Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum

Perrone R, Pedraja F, Valino G, Tassino B, Silva A (2019)
ACTA ETHOLOGICA 22(2): 79-89.

Download
Es wurde kein Volltext hochgeladen. Nur Publikationsnachweis!
Zeitschriftenaufsatz | Veröffentlicht | Englisch
Autor
; ; ; ;
Abstract / Bemerkung
Agonistic behavior involves the displays that arise when conspecifics compete for valuable resources such as territory. After conflict resolution, dominants obtain priority access to the resource while subordinates lose it. We aimed to evaluate how agonistic encounters mediate the acquisition of different sized territories in the weakly electric fish, Gymnotus omarorum, a species that displays a well-documented non-breeding agonistic behavior very unusual among teleosts. When tested in intrasexual and intersexual dyads in small arenas, a sex-independent dominant-subordinate status emerged after highly aggressive contests in which subordinates signaled submission by retreating and emitting submissive electric signals. We staged dyadic agonistic encounters in a large arena, in which the initial interindividual distance resembled the one observed in nature. We observed the emergence of a dominant-subordinate status after longer but milder contests with rare electric signaling of submission. We found the persistence of dominance over time with no outcome reversion. We observed how dominants exclude subordinates from their conquered resource during all the recording time. Although the territorial behavior of Gymnotus has been put forth since pioneer reports, this is the first study to show how agonistic behavior depends on the territory size in this genus. Agonistic encounters of G. omarorum in the small arena resemble the characteristics of violent-like behaviors. The ease of shifting from mild to high levels of aggression due to confinement, together with the use of electrical signaling of submission, makes this species an excellent model to explore new perspectives in territoriality assessment.
Erscheinungsjahr
Zeitschriftentitel
ACTA ETHOLOGICA
Band
22
Ausgabe
2
Seite(n)
79-89
ISSN
eISSN
PUB-ID

Zitieren

Perrone R, Pedraja F, Valino G, Tassino B, Silva A. Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum. ACTA ETHOLOGICA. 2019;22(2):79-89.
Perrone, R., Pedraja, F., Valino, G., Tassino, B., & Silva, A. (2019). Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum. ACTA ETHOLOGICA, 22(2), 79-89. doi:10.1007/s10211-019-00309-7
Perrone, R., Pedraja, F., Valino, G., Tassino, B., and Silva, A. (2019). Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum. ACTA ETHOLOGICA 22, 79-89.
Perrone, R., et al., 2019. Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum. ACTA ETHOLOGICA, 22(2), p 79-89.
R. Perrone, et al., “Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum”, ACTA ETHOLOGICA, vol. 22, 2019, pp. 79-89.
Perrone, R., Pedraja, F., Valino, G., Tassino, B., Silva, A.: Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum. ACTA ETHOLOGICA. 22, 79-89 (2019).
Perrone, Rossana, Pedraja, Federico, Valino, Guillermo, Tassino, Bettina, and Silva, Ana. “Non-breeding territoriality and the effect of territory size on aggression in the weakly electric fish, Gymnotus omarorum”. ACTA ETHOLOGICA 22.2 (2019): 79-89.