| kelp and dolphin gulls cause perineal wounds in south american fur seal pups (arctocephalus australis) at guafo island, chilean patagonia. | during five reproductive seasons, we documented the presence, extent and origin of perineal wounds in south american fur seal pups (arctocephalus australis) on guafo island, northern chilean patagonia. the seasonal prevalence of perineal wounds ranged from 5 to 9%, and new cases were more common at the end of the breeding season (february), when pups were on average two months old and were actively expelling hookworms (uncinaria sp). histologically, wounds corresponded to marked ulcerative lymph ... | 2017 | 28791178 |
| distribution patterns predict individual specialization in the diet of dolphin gulls. | many animals show some degree of individual specialization in foraging strategies and diet. this has profound ecological and evolutionary implications. for example, populations containing diverse individual foraging strategies will respond in different ways to changes in the environment, thus affecting the capacity of the populations to adapt to environmental changes and to diversify. however, patterns of individual specialization have been examined in few species. likewise it is usually unknown ... | 2013 | 23844073 |
| phylogenetic relationships within the laridae (charadriiformes: aves) inferred from mitochondrial markers. | gulls (aves: laridae) constitute a recent and cosmopolite family of well-studied seabirds for which a robust phylogeny is needed to perform comparative and biogeographical analyses. the present study, the first molecular phylogeny of all larids species (n=53), is based on a combined segment of mtdna (partial cytochrome b and control region). we discuss our phylogenetic tree in the light of previous suggestions based on morphological, behavioral, and plumage characters. although the phylogeny is ... | 2005 | 16054399 |
| hemosporidian blood parasites in seabirds--a comparative genetic study of species from antarctic to tropical habitats. | whereas some bird species are heavily affected by blood parasites in the wild, others reportedly are not. seabirds, in particular, are often free from blood parasites, even in the presence of potential vectors. by means of polymerase chain reaction, we amplified a dna fragment from the cytochrome b gene to detect parasites of the genera plasmodium, leucocytozoon, and haemoproteus in 14 seabird species, ranging from antarctica to the tropical indian ocean. we did not detect parasites in 11 of the ... | 2010 | 20652673 |
| gastrointestinal helminths of fish-eating birds from chiloe island, chile. | of four species of fish-eating birds from chiloé island (chile), three were infected with eight species of helminths. tetrabothrius sp. was found in larus scoresbii. tetrabothrius cylindraceus, profilicollis antarcticus, anomotaenia dominicanus, stephanoprora denticulata, capillaria sp. and p. antarcticus were found in larus dominicanus. contracaecum rudolphii and corynosoma sp. infected phalacrocorax olivaceus. with the exception of s. denticulata, c. rudolphii and capillaria sp., the above hel ... | 1991 | 2023322 |