| individual female clutch identification through yolk protein electrophoresis in the communally breeding guira cuckoo (guira guira). | avian communal breeding systems generate alternative behavioural strategies for females, resulting in differences in reproductive success. identifying eggs of different females in such systems is problematic, however, due to egg destruction before incubation, difficulty of capturing adults, and/or inaccuracy of egg identification based on egg morphometry. here, we describe a technique that uses electrophoresis of yolk proteins to determine egg ownership, which we applied to communally breeding g ... | 2002 | 12406251 |
| a new genus of syringophilid mites (acari: cheyletoidea: syringophilidae) from cuculiform birds (aves: cuculiformes). | cuculisyringophilus crotophaginus gen. n. et sp. n. is described from the guira cuckoo guira guira (gmelin) from paraguay and also was collected from the groove-billed ani crotophaga sulcirostris swainson from colombia and mexico. this new genus is closely related to neoaulobia fain, bochkov et mironov, 2000 but is distinguished by the following characters: propodosomal setae sce are situated distinctly anterior to level of setae d1, leg setae vs'ii are absent, apodemes i are divergent. | 2008 | 18666420 |
| epidemiological aspects of lice (menacanthus species) infections in laying hen flocks from the state of minas gerais, brazil. | the epidemiology of chicken lice species such as menacanthus stramineus, m. cornutus and m. pallidulus were studied during an observational, analytical and sectional survey, to determine predisposing factors for their occurrence in laying hen farms in the state of minas gerais, brazil. a total of 431 houses on 43 farms were visited in 2012. m. cornutus, m. stramineus and m. pallidulus occurred in 20.9%, 11.6% and 11.6% of farms, respectively. the frequencies of occurrence of m. cornutus, m. stra ... | 2016 | 26642864 |
| new feather mites of the genera aniacarus and aniibius (acariformes: pterolichidae) from two cuckoo species (cuculiformes: cuculidae) in brazil. | five new species of the family pterolichidae are described from two common non-parasitic cuckoo species of the subfamily crotophaginae (cuculiformes: cuculidae) in brazil: aniacarus ani sp. n. from the smooth-billed ani, crotophaga ani linnaeus, a. simplex sp. n., a. robustus sp. n., a. coronatus sp. n. and aniibius guirae sp. n. from the guira cuckoo, guira guira (gmelin). a key to all known species of aniacarus is provided. all four pterolichid species associated with the g. guira can occur si ... | 2015 | 25947463 |
| carcinopodacarus polymorphus gen. n. et sp. n. from guira guira (cuculiformes: cuculidae) in brazil: a first example of male polymorphism in the family dermationidae (acariformes: analgoidea). | carcinopodacarus polymorphus gen. n. et sp. n. (acariformes: dermationidae: dermationinae) is described from the guira cuckoo guira guira (gmelin) (cuculiformes: cuculidae) in brazil. the new genus differs from the closest genus, psittophagoides fain, 1964, by the following features: in both sexes, the anterior spines of trochanters i and ii are absent (vs present in psittophagoides), setae d2 are distinctly developed (vs only alveoli), and genual setae mgi are absent (vs present); in males, the ... | 2015 | 25960553 |
| from cuckoos to chickens: a caught-in-the-act case of host shift in feather mites (arachnida: acari: psoroptoididae). | feather mites are highly specialized permanent ectosymbionts recorded from all recently recognized bird orders. these mites, specialized to live in the plumage of their hosts, rarely cause any visible damage to their specific hosts. recently described feather mite allopsoroptoides galli mironov (acariformes: psoroptoididae) was reported to cause severe mange in chickens in brazil, leading to unprecedented economic losses. until now, the natural host of a. galli remained unknown. in this paper, w ... | 2014 | 25185669 |
| why one-kilobase sequences from mitochondrial dna fail to solve the hoatzin phylogenetic enigma. | to address the suitability of mitochondrial dna sequence data for higher avian systematics, cytochrome b sequences for nine species of cuculiformes and galliformes were gathered and compared to those of the hoatzin, a specialized bird whose phylogenetic affinities have long puzzled ornithologists. additional avian cytochrome b sequences from genbank also were incorporated into the comparisons. various phenetic and parsimony analyses applied to the molecular data coded in four formats (nucleotide ... | 1994 | 8075835 |
| occurrence of paratanaisia confusa freitas, 1951 in free-living guira cuckoo (guira guira, cuculiformes: crotophagidae). | this report presents a description of natural infection of an adult free-living guira cuckoo with paratanaisia confusa. histological and morphological evaluations of renal and parasite samples were performed. the morphological analysis of the parasites revealed spiny tegument, characteristic of p. confusa helminthes. although macroscopic alterations were absent in the kidneys, the histopathology revealed parasites inside the collecting ducts causing dilatation and destruction of the lining epith ... | 2017 | 28746453 |
| [feeding ecology of the guira cuckoo (guira guira) in the northeastern buenos aires province]. | we studied the diet and feeding ecology of the guira cuckoo (guira guira), a bird that has a wide distribution in argentina. we analyzed 62 stomachs, obtained between 1991 and 1997 (26 in spring, 13 in summer, 10 in autumn and 13 in winter), in the localities la balandra and punta blanca, magdalena district, buenos aires province. in order to establish the contribution of each prey item, we applied the relative importance index. the dietary contribution in terms of number and volume was also tak ... | 2008 | 19419089 |
| maternal androgens in eggs of communally breeding guira cuckoos (guira guira). | variation of maternal androgens in avian eggs may be a mechanism of maternal influence on offspring development, growth, and/or behavior. we studied yolk androgen concentrations in eggs of guira cuckoos (guira guira) to understand how females might enhance the success of offspring in a complex communal breeding system. we measured concentrations of androstenedione, 5alpha-dihydrotestosterone, and testosterone in yolks and identified eggs and clutches of individuals in joint nests by yolk protein ... | 2006 | 16457829 |
| phylogenetic relationships of the hoatzin, an enigmatic south american bird. | the hoatzin (opisthocomus hoazin) lives in the humid lowlands of northern and central south america, often in riparian habitats. it is a slender bird approximately 65 cm in length, brownish with lighter streaks and buffy tips to the long tail feathers. the small head has a ragged, bristly crest of reddish-brown feathers, and the bare skin of the face is bright blue. it resembles a chachalaca (ortalis, cracidae) in size and shape, but its plumage and markings are similar to those of the smaller g ... | 1995 | 8524824 |
| vaterite, a constituent of the eggshells of the nonparasitic cuckoos, guira guira and crotophagi ani. | the crystalline spherules occurring in patches on the outer surface of the eggshells of guira guira and the bloom on the entire outer surface of those of crotophagi ani were shown by x-ray diffraction analysis to be vaterite. | 1979 | 116746 |
| a review of the feather mite family gabuciniidae gaud amp; atyeo (acariformes: astigmata: pterolichoidea) of brazil, with descriptions of eleven new species. | the feather mite family gabuciniidae currently includes 16 genera and approximately 65 described species associated with birds of nine orders, with the greatest diversity on accipitriformes. in this study, 11 new species are described from the following hosts: aetacarus accipiter sp. nov. from the bicolored hawk accipiter bicolor (vieillot, 1817) (accipitriformes: accipitridae), capitolichus campoflicker sp. nov. from the campo flicker colaptes campestris (vieillot, 1818) (piciformes: picidae), ... | 2020 | 32230117 |
| chromosomal evolution and phylogenetic considerations in cuckoos (aves, cuculiformes, cuculidae). | the cuckoos have a long history of difficult classification. the species of this order have been the subject of several studies based on osteology, behavior, ecology, morphology and molecular data. despite this, the relationship between cuculiformes and species of other orders remains controversial. in this work, two species of cuculidae, guira guira (gmelin, 1788) and piaya cayana (linnaeus, 1766), were analyzed by means of comparative chromosome painting in order to study the chromosome evolut ... | 2020 | 32469879 |
| functional morphology of the cranio-mandibular complex of the guira cuckoo (aves). | the cranio-mandibular complex is an important structure involved in food capture and processing. its morphology is related to the nature of the food item. jaw muscles enable the motion of this complex and their study is essential for functional and evolutionary analysis. the present study compares available behavioral and dietary data obtained from the literature with novel results from functional morphological analyses of the cranio-mandibular complex of the guira cuckoo (guira guira) to unders ... | 2018 | 29533471 |