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| Acosta,Alberto; González Pontificia,Ana M.. |
| There are few regional studies attempting to compare the asexual reproductive output of marine populations, particularly when they are exposed to different environmental conditions. In this study we compared Caribbean and Southwestern Atlantic Palythoa caribaeorum populations in terms of ramet production, the minimum colony size for fission, and the relationship between fission frequency and colony size. Fission process was quantified in Ponta Recife and Praia Portinho, Sao Paulo, Brazil, and in Punta de Betín, Colombia, during the summer (December-January) of 1997 and 1998, respectively. Fission started at small colony size in both populations studied (> 4 cm2). The number of ramets produced per colony increased with colony size in Brazil and Colombia.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asexual reproduction; Colony size; Fission; Latitudinal comparison. |
| Ano: 2007 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612007000100007 |
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| Vargas-Mena,Juan Carlos; Cordero-Schmidt,Eugenia; de Medeiros Bento,Diego; Rodriguez-Herrera,Bernal; Medellín,Rodrigo A; Venticinque,Eduardo M. |
| Caves are important roosts for bats in karstic areas and play a critical role in the protection of bat populations. In the state of Rio Grande do Norte, in northeastern Brazil, cave-dwelling bats are poorly studied. Moreover, the state contains more than 900 caves, mainly in the Caatinga biome, that may offer important roosts for local bat populations. Thus, to gain a first insight into the richness, diversity, and colony size of cave-bats in the state, we sampled 13 caves through active search and captures with mist nets. Sixteen species from five families were recorded, and the biggest colonies belonged to Pteronotus gymnonotus and Phyllostomus discolor. Furna Feia cave was the richest, with 10 species. Our results showed that Rio Grande do Norte is home... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Assemblage; Caatinga; Cave-dwelling bats; Colony size; Richness. |
| Ano: 2018 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832018000100016 |
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| Raw,Anthony. |
| At a locality near Brasilia the sizes of hunting areas and of colonies of 13 species of social wasps varied greatly. Size of the hunting area varied 152 fold and was strongly related to the number of adult wasps per colony which varied 400 fold. The total number of adults of the 13 species was estimated at 182.9/ ha (range 7.1 fold among the species) and their total biomass was 1.6 kg/ ha (range 3.6 fold). Hunting range was not significantly related to body size. Variation in wing area (11.3 fold) was similar to that of the fresh weight of the adult female (10.7 fold). Eleven species showed habitat preferences where they hunted. Models relating prey size to the distance prey are carried are discussed. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vespidae; Colony size; Densities; Hunting area; Neotropics. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000300025 |
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