Herons
نویسندگان
چکیده
منابع مشابه
Rates of single-copy DNA evolution in herons.
DNA-DNA hybridization was used to discover the extent of single-copy DNA similarity among 13 species of herons and one ibis. Genetic distances among taxa were summarized as Tm values in a folded matrix. From this matrix, trees with the same branching pattern were constructed by least squares under one of two assumptions: (1) that sister branches are equal in length and (2) that sister branches ...
متن کاملVision and Foraging in Cormorants: More like Herons than Hawks?
BACKGROUND Great cormorants (Phalacrocorax carbo L.) show the highest known foraging yield for a marine predator and they are often perceived to be in conflict with human economic interests. They are generally regarded as visually-guided, pursuit-dive foragers, so it would be expected that cormorants have excellent vision much like aerial predators, such as hawks which detect and pursue prey fr...
متن کاملHealth assessment of Black-crowned Night-herons (Nycticorax nycticorax) of the New York Harbor estuary.
Blood samples from 145 Black-crowned Night-heron (Nycticorax nycticorax, BCNH) chicks (mean age 3 weeks) were taken from four island colonies (Goose (2004), Canarsie Pol (2005), Hoffman (2004 and 2005) and North Brother (2004 and 2005)) in New York Harbor in 2004 and 2005 to establish baseline health reference ranges for this species and to compare health indices of birds reared on different is...
متن کاملPrimary immunoglobulin response of herons to infection with Venezuelan encephalitis virus.
Seven to nine days after inoculation with a replicating antigen, Venezuelan encephalitis virus, hemagglutination-inhibiting antibodies were present in plasma of 18 to 20 black-crowned night herons (BCNH), 14 of 15 great egrets (ge) , and 7 of 7 snowy egrets (SE). 19S (immunoglobulin M) precedes 7S (immunoglobulin G) antibodies in all but one bird of six GE, six SE, and six BCNH. 19S antibodies ...
متن کاملEcology and contaminant exposure of Lake Calumet Black-crowned Night Herons: Population Levels and Nesting Ecology Final Report
We examined a suite of organic and inorganic analytes in a sample of Black-crowned NightHeron (BCNH) embryos collected from a colony located adjacent to Lake Calumet in southeastern Chicago, Illinois, in 2002. Our objectives were to determine whether embryos from the Lake Calumet colony had greater exposure to environmental contaminants, when compared to samples from other contemporary populati...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1953
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay1286