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Does the reproductive season account for more records of birds in a marked seasonal climate landscape in the state of São Paulo, Brazil? Pap. Avulsos de Zool. (São Paulo)
Cavarzere,Vagner.
Investigators have reported that birds from temperate regions are more detectable during their breeding seasons, which should be used to adequately survey avifaunas. In the state of São Paulo, southeastern Brazil, the rainiest months of the year are usually associated with a peak in the reproduction of birds. To test the hypothesis that birds are equally detectable throughout the year, I conducted transect counts of birds in a predominantly open Cerrado landscape in São Paulo during 2005 and 2006. There was no significant difference in the number of species or individuals between breeding (rainy) and nonbreeding (dry) seasons; 24% of the species with > 50 contacts was likely to be recorded more often in a particular season. Unlike temperate regions,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Breeding season; Neotropical region; Sampling period; Seasonal abundance; Seasonal climate; Seasonal species richness.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492013001800001
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Comparative evaluation of fish assemblages census on an artificial reef Zoologia
Brotto,Daniel S.; Krohling,Werther; Zalmon,Ilana R..
One of the main issues regarding artificial reef fish evaluation is the performance of an efficient visual census sampling. An experimental artificial reef made of four different types of concrete modules was implanted on the north coast of Rio de Janeiro (21º29'S, 41º00W). Two interval-sampling periods using a visual census method were performed in the summer of 2003 (N = 6) and 2004 (N = 6), weekly and daily, respectively. The longer interval-sampling period showed twice of species with eight exclusive ones. Total fish abundance was higher during the shorter interval-sampling period, due to the presence of large shoals of Chloroscombrus chrysurus (Linnaeus, 1766) and Haemulon aurolineatum (Cuvier, 1829) especially at the complex modules. Fish abundance...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Experimental reef complex; Rio de Janeiro; Sampling period; Underwater visual census.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400037
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