|
|
|
|
| |
|
|
| Snow, K.; Sloyan, B. M.; Rintoul, S. R.; Hogg, A. Mcc.; Downes, S. M.. |
| Circulation on the Antarctic continental shelf influences cross-shelf exchange, Antarctic Bottom Water formation, and ocean heat flux to floating ice shelves. The physical processes driving the shelf circulation and its seasonal and interannual variability remain poorly understood. We use a unique time series of repeat hydrographic observations from the Adélie Land continental shelf and a box inverse model to explore the relationship between surface forcing, shelf circulation, cross-shelf exchange, and dense water formation. A wind-driven northwestward coastal current, set up by onshore Ekman transport, dominates the summer circulation. During winter, strong buoyancy loss creates dense shelf water. This dense water flows off the shelf, with a compensating... |
| Tipo: Text |
Palavras-chave: Antarctic shelf circulation; Cross-shelf exchange; Antarctic bottom water; Surface fluxes; Seasonal; Interannual variability. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00344/45566/45173.pdf |
| |
|
| |
|
|
| Matias,Nathalia Rocha; Verrastro,Laura. |
| ABSTRACT Studies on the thermal biology of fossorial reptiles that examine the relationship between the body temperature and thermal environment are needed to determine the extent of their thermoregulation abilities. This study assessed the thermal biology of Amphisbaena munoai Klappenbach, 1969 in the rocky fields of the Rio Grande do Sul and in the laboratory. The body temperature of most individuals was between 24 and 30 °C, both in the field (n = 81) and laboratory (n = 19). More individuals were caught in winter (n = 55) and spring (n = 60) than in summer (n = 25) and fall (n = 45), and in spring, individuals showed similar nocturnal and diurnal activities. In the laboratory, we found individuals with body temperatures up to 5 °C higher than the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphisbaenians; Microhabitat; Seasonal; Thermoregulation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100313 |
| |
|
|
| Sankarankutty,C; Oliveira,J.E. Lins; Cunha,K.M.F; Silva,A.C.C; Barroca,E.V.G. |
| The present paper deals with data on zooplankton collected from the estuary of Potengi, Natal, Rio Grande do Norte, Brazil covering a period of one year from October 1992 to October 1993. Three fixed stations within the estuary located at varying distances from the mouth of the river were sampled. Sampling was done monthly when the tide was lowest. Analysis of the samples has shown clear pattern of seasonal variations in abundance of the dominant zooplankton components which are composed of Copepoda, Appendicularia, larvae of Brachyura, larvae of Cirripedia and Chaetognalha. A detailed study of the larvae of Brachyura was also attempted which showed that seven species can be identified in the samples, of which those of Aratus pisonii (H. Milne Edwards) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachyura; Seasonal; Abundance; Taxonomy; Larvae; Estuary; Brazil. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000200007 |
| |
|
|
| Haddad,Maria A.; Nogueira Júnior,Miodeli. |
| The scyphozoan Phyllorhiza punctata von Lendenfeld, 1884 (Mastigiidae), known only from Indo-Pacific waters prior to the 1950s, is today found far from its original distribution, probably due to human activities. First seen in 1955 in Brazilian waters, medusae were found in southern and southeastern coasts, disappearing (at least as a medusa) in the early 1960's. Another population was found in the late 1990's, in the state of Bahia, and again in late 2001, many sightings were reported along the coasts of Paraná and Santa Catarina (25º20'S, 48º12'W to 27º26'S, 48º22'W). A large summer bloom, followed by decline and disappearance in winter and spring, occurs every year since then. The reasons for this recent mass occurrence are unknown. Despite few... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Introduced species; Jellyfish; Population dynamics; Seasonal. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000300030 |
| |
|
| |
|
|
| Lima,Camila S.; Fabián,Marta Elena. |
| Abstract Bats of the Phyllostomidae family exhibit different reproductive patterns in Neotropical regions and the strategy adopted depends on the regional climate. Here we studied the reproductive biology of Artibeus fimbriatus at the southern limit of their distribution in Brazil. This region has no rainy season, and the climate is characterized by high temperatures and variable photoperiods. We examined 129 A. fimbriatus females over several months, and used histological procedures where necessary in order to determine whether bats were pregnant. Females exhibited a long reproductive period and were pregnant from June until February. The reproduction events were found to be dependent on the photoperiod, but independent of annual accumulated... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Phyllostomidae; Photoperiod; Reproduction; Seasonal. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000400504 |
| |
|
|
| Gondolo,Guilherme Fernandez; Mattox,George Mendes Taliaferro; Cunningham,Patricia Teresa Monteiro. |
| Sandy beaches are among the most extensive environments in Brazil and are generally threatened by disorderly urban growth due to their location along the coast, where human populations tend to concentrate. This is especially true in southeastern Brazil, where the largest urban areas are located. Thus, better knowledge regarding these natural resources is of considerable importance. The surf zone of sandy beaches is inhabited by a number of fish species, including juveniles seeking both food and shelter from predators. An ecological survey was conducted in the surf zone of Itamambuca beach in the city of Ubatuba, São Paulo State, Brazil, in order to evaluate the composition, structure and dynamics of the fish fauna using community descriptors. Diurnal and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Marine fish; Sandy beach; Community; West Atlantic; Seasonal; Diel cycle. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200019 |
| |
|
|
|
