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Distribuição vertical de EUPHAUSIACEA ao largo do arquipélago de São Pedro e São Paulo
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lima, Cynthia Dayanne Mello De |
| Copyright Year | 2016 |
| Abstract | This study describes the vertical distribution of euphausiid in the presence of a permanent thermocline in the oligotrophic waters of the Tropical Atlantic (00o 55 'N, 29o 21' W). Sampling was conducted from June 2010 to October 2011, from 100 to zero m in vertically stratified hauls during day and the night. Densities were analyzed regarding their relation to depth, temporal variability and station. Mean total euphausiids density was 2.65 ind. m 3 with values up to 30.4 ind. m 3. This community was mainly composed of larvae (80%). Larvae of the Euphausia were most abundant, with 56.4% of all individuals. Euphausiids were always most abundant during the night. The ontogenetic vertical distribution of euphausiids presented three patterns: (i) calyptopis larvae were most abundant in the transition layer (ii) furcilia larvae in the upper mixed layer. (iii) and for adults, patterns varied according to species. Distinct distribution patterns could be described three species of Euphausia (E. americana, E. tenera and E. similis) and two species of Stylocheiron (S. carinatum and S. suhmii), suggesting that congeneric species of these two genera perform resource partition in the water column. Our data support the idea that the transition layer at the base of the upper mixed layer is an important habitat for euphausiids in the study area. This study revealed speciesand stagespecific patterns of vertical distribution for these key taxa in the oligotrophic tropical oceans. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://repositorio.ufpe.br/bitstream/123456789/18330/1/Disserta%C3%A7%C3%A3ofinal_CynthiaLima.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
