Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)

Salps and chaetognaths constitute an important fraction of the macrozooplankton and have a prominent role in the marine food web. In our study, we analyzed the species composition, density, and biomass in an area of the southern Atlantic Ocean during the austral winters of 1999, 2000, and 2001. The...

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Autor principal: Daponte, M.C
Otros Autores: Calcagno, J.A, Acevedo-Luque, M.J.J, Martos, P., Machinandiarena, L., Esnal, G.B
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2011
Acceso en línea:Registro en Scopus
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100 1 |a Daponte, M.C. 
245 1 0 |a Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S) 
260 |c 2011 
270 1 0 |m Daponte, M.C.; Departamento Biodiversidad y Biología, Experimental-Universidad de Buenos Aires. Pab.II, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina; email: daponte@bg.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a Salps and chaetognaths constitute an important fraction of the macrozooplankton and have a prominent role in the marine food web. In our study, we analyzed the species composition, density, and biomass in an area of the southern Atlantic Ocean during the austral winters of 1999, 2000, and 2001. The most abundant and frequent species were the salpids Ihlea magalhanica (Apstein, 1894) and Iasis zonaria (Pallas, 1774), and the chaetognaths Parasagitta friderici (Ritter-Zahony, 1911) and Serratosagitta tasmanica (Thomson, 1947). Chaetognaths were found in over 80% of the stations throughout the three winters, reaching up to 67 individuals (ind) m -3. Salps were found surviving at low population densities in 2000 and 2001, but in 1999, there were mass occurrences of I. zonaria and I. magalhanica, reaching densities of 301 and 123 ind m -3, respectively. To estimate biomass in C units, the relationship between dry weight and size was calculated for S. tasmanica and for solitaries and aggregates of I. zonaria and I, magalhanica. The biomass of salps and chaetognaths (as mg C m -3) over the shelf during the three consecutive winters was strongly related to prevailing physical and biological conditions. In 1999, the greatest contribution to macrozooplankton biomass corresponded to salps, while in 2000 and 2001, chaetognaths dominated the biomass. In swarm conditions, like in 1999, I. zonaria and I. magalhanica widely dominated over copepods and chaetognaths, producing an increase in the quantity of available C of up to 60 times in relation to the periods with very low population densities. © 2011 Rosenstiel School of Marine and Atmospheric Science.  |l eng 
593 |a Departamento Biodiversidad y Biología, Experimental-Universidad de Buenos Aires. Pab.II, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina 
593 |a Departamento Ecologia, Genetica y Evolucion, Universidad de Buenos Aires. Pab.II, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina 
593 |a Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Argentina 
593 |a Institute Nacional de Investigación y Desarrollo Pesquero (INIDEP), Paseo Victoria Ocampo N 1, (B7602HSA) Mar del Plata, Argentina 
593 |a Universidad Nacional de Mar del Plata (UNMDP), B7602HSA. Mar del Plata, Argentina 
690 1 0 |a AQUATIC ORGANISM 
690 1 0 |a BIOMASS 
690 1 0 |a COMMUNITY COMPOSITION 
690 1 0 |a ESTIMATION METHOD 
690 1 0 |a FOOD WEB 
690 1 0 |a INVERTEBRATE 
690 1 0 |a MARINE ENVIRONMENT 
690 1 0 |a POPULATION DENSITY 
690 1 0 |a SPECIES DIVERSITY 
690 1 0 |a ZOOPLANKTON 
690 1 0 |a ATLANTIC OCEAN 
690 1 0 |a ATLANTIC OCEAN (SOUTHEAST) 
690 1 0 |a CHAETOGNATHA 
690 1 0 |a COPEPODA 
690 1 0 |a IASIS ZONARIA 
690 1 0 |a IHLEA 
690 1 0 |a PARASAGITTA 
690 1 0 |a SALPIDA 
690 1 0 |a SALPIDAE 
690 1 0 |a SERRATOSAGITTA TASMANICA 
700 1 |a Calcagno, J.A. 
700 1 |a Acevedo-Luque, M.J.J. 
700 1 |a Martos, P. 
700 1 |a Machinandiarena, L. 
700 1 |a Esnal, G.B. 
773 0 |d 2011  |g v. 87  |h pp. 437-461  |k n. 3  |p Bull. Mar. Sci.  |x 00074977  |t Bulletin of Marine Science 
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856 4 0 |u https://doi.org/10.5343/bms.2010.1014  |y DOI 
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