CEPAVE   05420
CENTRO DE ESTUDIOS PARASITOLOGICOS Y DE VECTORES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
ESTIMATION OF PARASITE-PREY ASSOCIATION IN PELLETS OF TWO PATAGONIAN CORMORANT SPECIES
Autor/es:
FUCHS , DANIELA V.; MILLONES, A; MONTALTI, D; DÍAZ, J; MORGENTHALER, A; FRERE, E; GARBIN, LUCAS; KUBA, L; GANDINI, P; NAVONE, G
Lugar:
CABA
Reunión:
Jornada; XVIII Jornadas Anuales Multidisciplinarias; 2016
Institución organizadora:
Sociedad Argentina de Biología (SAB)
Resumen:
Helminth parasites of marine birds usually have indirect life cycles and are mostly acquired through the diet. Usually, Anisakidae use fish as intermediate before reaching piscivorous birds. Objectives were to identify prey items, Anisakidae found in pellets from both the Imperial Cormorant Phalacrocorax atriceps and Red-legged Cormorant P. gaimardi; and to establish parasite-prey association between prey items and anisakids. A total of 82 pellets of P. atriceps and 72 of P. gaimardi from Punta León colony, Chubut, and Isla Elena, Ría Deseado, Santa Cruz, respectively. The parasite-prey association was estimated using Fisher`s Test, and Spearman?s Correlation. The Imperial cormorant?s diet included 22 fish, 11 crustacean, 6 mollusk, and 3 polychaete species. Red-legged Cormorant diet consisted of 6 fish, 2 cephalopods, 1 polychaete, and 1 crustacean species. Pseudoterranova was the most prevalent and intense (P=65, MI=4) in P. atriceps. On P. gaimardi, Hysterothylacium (P=60) was the most prevalent and Contracaecum the most intense (MI= 4). The highest significant parasite-prey associations were those of Contracaecum L3 and the Fuegian Sprat Sprattus fueguensis, and the squid Loligo gahi in P. gaimardi. On P. atriceps, Contracaecum was associated significantly with Paralichthys sp., Engraulis anchoita, Gammaridea, Raneya brasiliensis, Patagonotothen sp., Ostracoda, and finally Percophis sp. These results suggest that pellets can be postulated as good indicator of parasite-prey association between cormorant prey items and anisakid species, since all information they can provide about cormorant feeding habits and parasite burdens and diversity.