Chaetognatha of the Brazil-Malvinas (Falkland) confluence: distribution and associations
| Autor: | María Cristina Daponte, Alina María Crelier |
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| Rok vydání: | 2004 |
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| Zdroj: | Iheringia: Série Zoologia, Vol 94, Iss 4, Pp 403-412 (2004) Iheringia. Série Zoologia, Volume: 94, Issue: 4, Pages: 403-412, Published: 30 DEC 2004 Iheringia. Série Zoologia v.94 n.4 2004 Iheringia. Série Zoologia Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) instacron:FZB/RS |
| ISSN: | 0073-4721 |
| DOI: | 10.1590/s0073-47212004000400008 |
| Popis: | The planktonic chaetognaths from the Brazil-Malvinas (Falkland) confluence, extending between 36º 30' - 50º 5' S and 60º 33' - 41º 7' W, were studied. Ten species were found: Eukrohnia hamata (Möbius, 1875) (Eukrohniidae), Pterosagitta draco (Krohn, 1853) (Pterosagittidae), Sagitta enflata Grassi, 1881, Sagitta gazellae Ritter-Zahony, 1909, Sagitta hexaptera d´Orbigny, 1834, Sagitta lyra Krohn, 1853, Sagitta minima Grassi, 1881, Sagitta planctonis Steinhaus, 1896, Sagitta serratodentata Krohn, 1853, and Sagitta tasmanica Thomson, 1947 (Sagittidae). Sagitta gazellae was the most abundant species followed by E. hamata, S. tasmanica and S. serratodentata. The association analysis among the different species, salinity and temperature revealed two groups of species, one related to higher salinities and warmer waters (P. draco, S. hexaptera and S. serratodentata) and the other to lower salinities and colder waters (E. hamata, S. gazellae and S. tasmanica). The fact that P. draco and S. hexaptera, formerly defined as warm-water species, appeared further south than previously reported might be related to the existence of warm core eddies up to 46º S in September and October 1988. |
| Databáze: | OpenAIRE |
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