INVESTIGADORES
MARTELLA Monica Beatriz
artículos
Título:
Agonistic behaviour in wild male Magellanic Penguins: when and how do they interact?
Autor/es:
RENISON D.; BOERSMA P.B.; VAN BUREN A.; MARTELLA M.B.
Revista:
Journal of Ethology
Editorial:
Japan Ethological Society and Springer-Verlag
Referencias:
Año: 2006 p. 189 - 193
ISSN:
0289-0771
Resumen:
Game-theory models predict that the frequency
and type of agonistic interactions should vary with the value
of the resource being contested. We describe bill duels and
overt fighting in male Magellanic penguins (Spheniscus
magellanicus) at a breeding colony and determine whether
these behaviors change with the value of the nests over
which they interact. Bill duels represent low levels of
aggression while overt fighting high levels of aggression.
Consistent with predictions, overt fighting was more
common before egg laying when nests have the highest
potential value while bill duels were more common at failed
nests later in the season when nests are less valuable as they
could not be used for reproduction until the next season.
Contrary to expectations, overt fights were shorter and
resulted in fewer cuts before egg laying than after egg laying.
Large size asymmetries between opponents before egg
laying may enable losers to quickly assess their opponents
and leave before they are hurt. As predicted, the duration
and damage occurring during overt fights were positively
correlated with nest cover, which is correlated with higher
reproductive success. We conclude that male Magellanic
penguins have rules of engagement that in the most cases
follow game-theory predictions on when and how to
interact.Spheniscus
magellanicus) at a breeding colony and determine whether
these behaviors change with the value of the nests over
which they interact. Bill duels represent low levels of
aggression while overt fighting high levels of aggression.
Consistent with predictions, overt fighting was more
common before egg laying when nests have the highest
potential value while bill duels were more common at failed
nests later in the season when nests are less valuable as they
could not be used for reproduction until the next season.
Contrary to expectations, overt fights were shorter and
resulted in fewer cuts before egg laying than after egg laying.
Large size asymmetries between opponents before egg
laying may enable losers to quickly assess their opponents
and leave before they are hurt. As predicted, the duration
and damage occurring during overt fights were positively
correlated with nest cover, which is correlated with higher
reproductive success. We conclude that male Magellanic
penguins have rules of engagement that in the most cases
follow game-theory predictions on when and how to
interact.) at a breeding colony and determine whether
these behaviors change with the value of the nests over
which they interact. Bill duels represent low levels of
aggression while overt fighting high levels of aggression.
Consistent with predictions, overt fighting was more
common before egg laying when nests have the highest
potential value while bill duels were more common at failed
nests later in the season when nests are less valuable as they
could not be used for reproduction until the next season.
Contrary to expectations, overt fights were shorter and
resulted in fewer cuts before egg laying than after egg laying.
Large size asymmetries between opponents before egg
laying may enable losers to quickly assess their opponents
and leave before they are hurt. As predicted, the duration
and damage occurring during overt fights were positively
correlated with nest cover, which is correlated with higher
reproductive success. We conclude that male Magellanic
penguins have rules of engagement that in the most cases
follow game-theory predictions on when and how to
interact.