Publications

sarcocystis sp. in wading birds (ciconiiformes) from florida.	sarcocysts were found in striated muscle of 21 adult wading birds among 145 examined grossly and 70 examined histologically (calculated prevalence = 24%), and in none of 332 immature wading birds examined from florida (usa). six of 12 species of ciconiforms were infected (ardea herodias, casmerodius albus, egretta caerulea, nyctanassa violacea, butorides striatus, eudocimus albus). cysts were filamentous, usually extended the entire length of the muscle fiber, and were visible grossly in 33% of ...	1994	8151820
cadmium and lead exposure associated with reduced growth rates, poorer fledging success of little blue heron chicks (egretta caerulea) in south louisiana wetlands.	persistent contaminants in ecosystems are often monitored via organisms that bioaccumulate the pollutant of interest. several published studies have used colonial wading birds to assess contamination by heavy metals in aquatic ecosystems. using a nonlethal sampling regimen, this study identified chick feathers and guano as tissues that best reflect local contamination. both cadmium and lead were detected in food samples (0.3-4.3 microg/g cd, 0.8-9.3 microg/g pb), guano (0.2-3.2 microg/g cd, 1.0- ...	1999	10473795
relative patterns and rates of evolution in heron nuclear and mitochondrial dna.	mitochondrial cytochrome b sequence data from 15 species of herons (aves: ardeidae), representing 13 genera, were compared with dna hybridization data of single-copy nuclear dna (scndna) from the same species in a taxonomic congruence assessment of heron phylogeny. the two data sets produced a partially resolved, completely congruent estimate of phylogeny with the following basic structure: (tigrisoma, cochlearius, (((zebrilus, (ixobrychus, botaurus)), (((ardea, casmerodius), bubulcus), ((egrett ...	2000	10723744
a new species of microphallus (trematoda: microphallidae) from venezuela.	during 1997-1999, a total of 94 crabs, uca rapax were collected from la sabana, la ceiba and el paujil, sucre state, venezuela. of these 36 were infected with metacercariae. two parasites were located in the abdominal muscles and one under the tissue of carapace and gonad. these metacercariae grew to adults in the following genera: levinseniella, microphallus and maritrema, in the period of 2-5 days after feeding experimentally to the rat rattus norvegicus, mice mus musculus and duck cairinia mo ...	2004	17354386
waterbirds (other than laridae) nesting in the middle section of laguna cuyutlán, colima, méxico.	laguna de cuyutlán, in the state of colima, mexico, is the only large coastal wetland in a span of roughly 1150 km. despite this, the study of its birds has been largely neglected. between 2003 and 2006 we assessed the waterbirds nesting in the middle portion of laguna cuyutlán, a large tropical coastal lagoon, through field visits. we documented the nesting of 15 species of non-laridae waterbirds: neotropic cormorant (phalacrocorax brasilianus), tricolored egret (egretta tricolor), snowy egret ...	2008	18624252
unravelling feeding territoriality in the little blue heron, egretta caerulea, in cananéia, brazil.	habitat use by the little blue heron (egretta caerulea) and discovery of feeding territoriality are discussed here. the results showed the existence of a territorial individual defending an area (2,564.46 +/- 943.56 m(2)) close to the mangrove, and non-territorial individuals (9.17 +/- 2.54) in the rest of a demarcated area (mean area for the non-territorial: 893.25 +/- 676.72). a weak positive correlation (r = 0.47, df = 46, p < 0.05) was found between the overlapping of territorial and non-ter ...	2010	20379651
polychlorinated biphenyl (pcb) congener concentrations in aquatic birds. case study: ilha grande bay, rio de janeiro, brazil.	livers from 108 birds found prostrate or dead in ilha grande bay between 2005 and 2010 were analyzed for 16 pcb congeners (iupac numbers 8, 18, 28, 31, 52, 77, 101, 118, 126, 128, 138, 149, 153, 169, 170, and 180). the species analyzed were egretta caerulea (linnaeus 1758), nycticorax nycticorax (linnaeus 1758), egretta thula (molina 1782), and ardea cocoi (linnaeus 1766). the analysis were performed using origin software (7.5, 2004) with a significant level of p<0.05. data were checked for adhe ...	2013	24346796
gryporhynchidae (cestoda: cyclophyllidea) in mexico: species list, hosts, distribution and new records.	as a result of this study, 8 new host (botaurus lentiginosus for glossocercus caribaensis and valipora mutabilis; egretta caerulea for valipora minuta; egretta thula for glossocercus cyprinodontis; egretta tricolor and nycticorax nycticorax for glossocercus caribaensis; pelecanus occidentalis and platalea ajaja for paradilepis caballeroi) and 31 new locality records for gryporhynchid cestode species in mexico are presented. with these data, the total number of species of this group of helminths ...	2014	24870465
spatial patterns of mercury contamination and associated risk to piscivorous wading birds of the south central united states.	piscivorous birds are top predators in aquatic ecosystems and are vulnerable to mercury (hg) exposure and associated adverse health effects. in some areas of north america, the health risk posed to piscivorous birds by hg contamination has not been characterized because concentrations of hg in bird tissues have not been extensively monitored. when data on hg in tissues of piscivorous birds are not available, the concentration of hg in the blood of piscivorous birds can be estimated from the conc ...	2019	30367697