Effects of competition on the territorial behaviour of a farmer damselfish, Plectroglyphidodon lacrymatus (Perciformes: Pomacentridae)

Aggression and territory size of the farmer damselfish Plectroglyphidodon lacrymatus were examined in the presence of adjacent territories of conspecific and heterospecific farmers that maintain algal turf territories on the reefs of Anda, north‐western Philippines. Plectroglyphidodon lacrymatus ter...

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Bibliographic Details
Published in:Journal of fish biology 2018-12, Vol.93 (6), p.1197-1206
Main Authors: Robles, Laurence E., Cabaitan, Patrick C., Aurellado, Maria Eleanor B.
Format: Article
Language:English
Subjects:
Aggression
Aggressive behavior
Aggressive behaviour
Agricultural economics
Algae
Animal behavior
Animals
Behavior, Animal
Benthos
Competitive Behavior
conspecific
Conspecifics
Corals
Ecosystem
Farmers
Fish
Habitat selection
heterospecific
Marine fishes
Perciformes - physiology
Philippines
Plectroglyphidodon lacrymatus
Probability theory
recovery
Territorial behavior
Territoriality
Territory
Turf
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Summary:Aggression and territory size of the farmer damselfish Plectroglyphidodon lacrymatus were examined in the presence of adjacent territories of conspecific and heterospecific farmers that maintain algal turf territories on the reefs of Anda, north‐western Philippines. Plectroglyphidodon lacrymatus territories with no adjacent neighbours had a mean size of 1.2 m2 whereas those adjacent to conspecifics were 47% smaller. In contrast, the mean size of territories adjacent to a heterospecific farmer (i.e., Pomacentrus burroughi, Pomacentrus chrysurus) did not differ from that of solitary individuals. Aggression towards conspecific farmers (84% probability) was higher than heterospecific farmers (31%). The higher aggression towards conspecific farmers suggests that the energetic costs for defence increased, which may have caused a decrease in territory sizes. Despite the higher aggression towards conspecific farmers, the thickness and percentage cover of algae inside the territories of focal fish did not appear to vary according to type of neighbouring farmer although algal turf cover was higher and juvenile coral occurrence was lower inside than outside the territories. Our results show that the territorial behaviour of P. lacrymatus varies with conspecific and heterospecific farmers, which may influence their distribution and benthic habitat characteristics.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.13841