Gill parasites of Cephalopholis argus (Teleostei: Serranidae) from Moorea (French Polynesia): site selection and coexistence

AbstractThe ectoparasite fauna of two damselfishes, Stegastes nigricans and Dascyllus aruanus, from Moorea Island in French Polynesia was investigated. Gills of these damselfishes were infected with congeneric Monopisthocotylea Monogenea belonging to the genus Haliotrema. Stegastes nigricans were found to harbour a guild of three Haliotrema species whereas only one species inhabited D. aruanus. Microhabitat distribution, inter- and intraspecific competition and interspecific associations on the gill were studied. Observations on site preference revealed no spatial segregation between the three congeneric species inhabiting the gills of S. nigricans. Juvenile and adult monogeneans of that guild occurred on the same microhabitat. The dominant species Haliotrema sp. 1 did not expand on the microhabitat when the intensity of infection increased. Interspecific association tests revealed positive and negative associations. Haliotrema sp. 4 expanded its distribution on the gills of Dascyllus aruanus when the intensity of infection increased suggesting the likelihood of intraspecific competition. Juvenile and adult monogeneans of Haliotrema sp. 4 appeared to segregate as a result of intraspecific competition. This competition may exist to enhance resource availability when the gill habitat is limited. Overlaps between niche breadth and species microhabitat were revealed for monogenean species inhabiting S. nigricans. Interspecific competition did not appear to play an important role in the distribution of S. nigricans congeneric ectoparasites. Reinforcement of reproductive barriers may have led to the avoidance of hybridization.

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Occurrence of mineralization disturbances in nacreous layers of cultivated pearls produced byPinctada margaritiferavar.cumingifrom French Polynesia. Comparison with reported shell alterations

Aquatic Living Resources ◽

10.1051/alr:1996022 ◽

1996 ◽

Vol 9 (2) ◽

pp. 187-193 ◽

Cited By ~ 16

Author(s):

Jean-Pierre Cuif ◽

Yannicke Dauphin

Keyword(s):

French Polynesia

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Elastase inhibitors and cancer preventive potential agents from Calophyllum inophyllum (L.) grown in French Polynesia

Planta Medica ◽

10.1055/s-0029-1234581 ◽

2009 ◽

Vol 75 (09) ◽

Author(s):

T Leu ◽

S Soulet ◽

G Herbette ◽

R Faure ◽

JP Bianchini ◽

...

Keyword(s):

French Polynesia ◽

Calophyllum Inophyllum

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First record of the superfamily Proctotrupoidea from French Polynesia (Hymenoptera)

Bulletin de la Société entomologique de France ◽

10.32475/bsef_2162 ◽

2020 ◽

Vol 125 (4) ◽

pp. 404-406

Author(s):

Thibault Ramage

Keyword(s):

First Record ◽

French Polynesia ◽

Society Islands ◽

First Time

A Helorid wasp, Helorus ruficornis Förster, 1856, is reported for the first time on Tahiti (Society Islands), which is also the first record of both Proctotrupoidea and family Heloridae in French Polynesia. The potential hosts of Helorus ruficornis in French Polynesia are discussed.

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