|
|
|
|
|
| Montag,Luciano Fogaça de Assis; Freitas,Tiago Magalhães da Silva; Raiol,Roberta Dannyele de Oliveira; Silva,Marlene Vasconcelos da. |
| This paper describes the length-weight relationship, size at first maturation (L), and breeding season of Poecilia reticulata found in drainage channels on the campus of the Federal University of Pará (UFPA) in the Brazilian city of Belém. A total of 1.936 specimens (942 males and 994 females) were collected in monthly samples of the study area between June, 2006, and March, 2007. Females were significantly longer and heavier than males. The length-weight relationship for males was established by the equation Pt = 5 × 10-5 × Ct2.397 and for females by Pt = 3 × 10-6 × Ct3.419. The estimated value of L was 17.5 mm for males and 20.4 mm for females, suggesting that males initiate reproductive activity at a smaller size than females. The abundance of mature... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish ecology; Urban environments; Breeding; Amazon; Poecilia reticulata. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300007 |
| |
|
|
| Peluffo,Julio; Moly de Peluffo,María C.; Rocha,Alejandra M.. |
| Numerous specimens of Echiniscus rufoviridis (Heterotardigrada, Echiniscidae) were recorded and studied from urban localities in Argentina. Since the first description of this species by <A HREF="#DuBois-Raymond">Du Bois-Raymond Marcus in 1944</A> on Brazilian specimens, it had not been recorded again. The validity of the species is confirmed, its geographic distribution is extended to Argentine localities and new data are provided on its morphology (optical and SEM) and its bioecology. Echiniscus rufoviridis can be clearly separated from the E. viridis, the closest species within the "viridis group", by the possession of depressions with pores on the surface of the cuticle, instead of papillae. On the other hand, an ecological similarity with... |
| Tipo: Journal article |
Palavras-chave: Urban environments; Argentina; Heterotardigrada; Echiniscidae; Echiniscus rufoviridis; Geographic distribution; Morphology; Rediscovery. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382002000200002 |
| |
|
|
| Martins,Aline C.; Gonçalves,Rodrigo B.; Melo,Gabriel A. R.. |
| Bee fauna and associated flora from a grassland site in Brazil, surveyed 40 and 20 years ago, were newly surveyed with comparable methodology to evaluate changes in the bee fauna of this site, considering that human population and urbanization has exponentially increased in the last 40 years. In general, bee species richness has declined in 22%, as well as their abundance. Some of the previously abundant species are now absent, including Bombus bellicosus Smith, 1879, Gaesischia fulgurans (Holmberg, 1903) and Thectochlora basiatra (Strand, 1910). No particular trend of differential decrease among either taxonomic or functional groups was observed, except for a minor increase in the proportion of oligolectic species and a 50% reduction in the number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apidae; Apoidea; Habitat fragmentation; Pollinators; Species richness; Urban environments. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200006 |
| |
|
|
|
