Resumo Existem escassos estudos de parasitismo em gaivota-de-Franklin Leucophaeus pipixcan, e o conhecimento sobre seus endoparasitas é ainda mais limitado. Com o objetivo de descrever sua comunidade parasitaria, um total de 60 gaivotas-de-Franklin foram capturadas usando-se armadilhas Bal-chatri numa zona costeira do centro do Chile. A pesquisa de ectoparasitas foi realizada em todos os indivíduos capturados e, para os endoparasitas, foram examinados 30 deles por necropsias. A prevalência de ectoparasitas foi de 78,3%, incluíndo o ácaro de pena Zachvatkinia larica (43,3%) e outras quatro espécies de piolhos, Actornithophilus piceus lari (15,0%), Austromenopon transversum (6,7%), Quadraceps punctatus (10,0%) e Saemundssonia lari (46,7%). Das aves necropsiadas, 83,3% estavam parasitadas por helmintos, sendo registrados Aporchis sp. (6,7%), Tetrabothrius cylindraceus (56,7%), Cyclophyllidea gen. sp. (3,3%), Profilicollis altmani (56,7%), Eucoleus contortus (10,0%), Cosmocephalus obvelatus (13,3%), Paracuaria adunca (10,0%), Stegophorus sp. (3,3%) e Tetrameres skrjabini (3,3%). Com exceção de P. altmani, este é o primeiro relato desses helmintos parasitando gaivotas-de-Franklin.

Abstract Parasitological studies of the Franklin's gull, Leucophaeus pipixcan, are scarce, and knowledge about its endoparasites is quite limited. In order to describe its parasitic community, a total of 60 Franklin’s gulls were captured in the coastal area in central Chile, using modified Bal-chatri traps. Ectoparasites were collected from all 60 live individuals through inspection of their plumage, while 30 were examined for endoparasites by standard parasitological necropsy. The prevalence of ectoparasites was 78.3%, including the feather mite Zachvatkinia larica (43.3%) and four species of lice: Actornithophilus piceus lari (15.0%), Austromenopon transversum (6.7%), Quadraceps punctatus (10.0%) and Saemundssonia lari (46.7%). Some 25 of 30 (83.3%) of birds necropsied were parasitized with the following helminths: Aporchis sp. (6.7%), Tetrabothrius cylindraceus (56.7%), Cyclophyllidea gen. sp. (3.3%), Profilicollis altmani (56.7%), Eucoleus contortus (10.0%), Cosmocephalus obvelatus (13.3%), Paracuaria adunca (10.0%), Stegophorus sp. (3.3%) and Tetrameres skrjabini (3.3%). To our knowledge, with the exception of P. altmani, these helminths are reported for first time in the Franklin's gull.

A total of 27 Long-tailed Meadowlarks Sturnella loyca (Molina, 1782) from the Biobío Region were examined between January 2005 and December 2008. Birds were infected with chewing lice (Phthiraptera), feather mites (Acari), and helminths (Platyhelminthes, Acanthocephala). Three species of chewing lice were found: Brueelia boae Cicchino and Castro, 1996 (26% prevalence), Menacanthus leistidis Cicchino, 1984 (7.4%), and Menacanthus sturnellae Price, 1977 (7.4%). Mites included 4 taxa: Amerodectes sp. (Mironov, 2008) (14.8%), Harphyrhynchoides sp. (Fain, 1972) (7.4%), Mesalgoides sp. (Fain, 1972) (3.7%), and Proctophyllodes sp. (Robin, Mégnin, 1877) (3.7%). Gastrointestinal helminths included the cestode Anonchotaenia longiovata (Fuhrmann, 1901) (18%) and the acanthocephalan Mediorhynchus robustus (Van Cleave, 1916) (3.7%). With the exception of B. boae and M. leistidis, all parasites represent new records for this passerine bird species.

Se analizaron 27 loicas Sturnella loyca (Molina, 1782) procedentes de la región del Biobío entre enero de 2005 y diciembre de 2008. Se recolectaron piojos (Phthiraptera), ácaros de plumas (Acari) y helmintos (Platyhelminthes, Acanthocephala). Se identificaron 3 especies de piojos: Brueelia boae Cicchino y Castro, 1996 (26% prevalencia), Menacanthus leistidis Cicchino, 1984 (7.4%) y Menacanthus sturnellae Price, 1977 (7.4%). Los ácaros incluyeron 4 taxa: Amerodectes sp. (Mironov, 2008) (14.8%), Harphyrhynchoides sp. (Fain, 1972) (7.4%), Mesalgoides sp. (Fain, 1972) (3.7%) y Proctophyllodes sp. (Robin, Mégnin, 1877) (3.7%). Los helmintos gastrointestinales encontrados fueron: el céstodo Anonchotaenia longiovata (Fuhrmann, 1901) (18%) y el acantocéfalo Mediorhynchus robustus (Van Cleave, 1916) (3.7%). Con excepción de B. boae y M. leistidis, todos los parásitos representan nuevos registros para esta especie.

Gastrointestinal and external parasites from 12 Green-backed Firecrown (Sephanoides sephaniodes) were collected between January 2004 and December 2008 from the Biobío Region south-central Chile and Santiago (central Chile). Helminths collected included 1 trematode species (Mosesia sp.) and 1 cestode species (Hymenolepis trinidadensis). The mite Proctophyllodes huitzilopchtlii was the only ectoparasite species found. All these parasites represent new records for Chile and the first parasites reported for this host species.

Se recolectaron parásitos internos (gastrointestinales) y externos de 12 picaflores (Sephanoides sephaniodes) entre enero del 2004 y diciembre del 2008, de la región del Biobío en el centro-sur de Chile y en Santiago, en la región central de Chile. Los helmintos recolectados incluyeron 1 especie de trematodo (Mosesia sp.) y 1 de cestodo (Hymenolepis trinidadensis). Únicamente se encontró 1 especie de ectoparásito, el ácaro Proctophyllodes huitzilopchtlii. Todos los parásitos mencionados representan nuevos registros para Chile y se registran por primera vez para este hospedero.