Little Blue Heron Egretta caerulea in South Africa
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چکیده
منابع مشابه
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...
متن کاملESTIMATION OF HEAVY METALS IN LITTLE BLUE HERON (Egretta caerulea) COLLECTED FROM SEPETIBA BAY, RIO DE JANEIRO, BRAZIL
Samples of liver and kidney of Little Blue Heron (Egretta caerulea) collected on Sepetiba Bay, Rio de Janeiro, Brazil, were analysed for their copper, zinc, cadmium, lead, chromium and nickel content. Mean concentration levels in liver and kidney (μg.g dry weight) were 6.32955 and 6.57136 (Cd); 78.17409 and 96.89409 (Zn); 44.01727 and 65.20864 (Cu); 41.15091 and 39.62318 (Pb); 2.80091 and 4.164...
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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 waterbi...
متن کاملInfluence of plumage colour on prey response: does habitat alter heron crypsis to prey?
The foraging strategies of wading birds may be influenced by their degree of crypsis to aquatic prey. White plumage has been hypothesized to be adaptive for herons hunting in open water habitats. We tested this hypothesis with laboratory and field experiments with multiple prey species. We investigated the response of crayfish, Procambarus spp., and mosquitofish, Gambusia affinis, to whiteand d...
متن کاملMercury in feathers of little egret Egretta garzetta and night heron Nycticorax nycticorax chicks and in theirprey in the Axios Delta, Greece.
Mercury concentrations were measured in feathers oflittle egret and night heron chicks and in their prey in the Axios Delta,Greece. Significantly higher concentrations occurred in night heron than inlittle egret in 1993. In the night heron the mercury content of feathers wasnegatively correlated to the size of chicks, possibly due to inhibition ofgrowth. Mercury concentrations were higher than ...
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ژورنال
عنوان ژورنال: Bulletin of the African Bird Club
سال: 1995
ISSN: 1352-481X
DOI: 10.5962/p.308881