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| DC Field | Value | Language |
|---|---|---|
| dc.creator | Vaqué, Dolors | - |
| dc.creator | Felipe, Jordi | - |
| dc.creator | Sala, M. Montserrat | - |
| dc.creator | Calbet, Albert | - |
| dc.creator | Estrada, Marta | - |
| dc.creator | Alcaraz, Miquel | - |
| dc.date | 2007-11-27T15:25:12Z | - |
| dc.date | 2007-11-27T15:25:12Z | - |
| dc.date | 2006-03-30 | - |
| dc.date.accessioned | 2017-01-31T00:59:03Z | - |
| dc.date.available | 2017-01-31T00:59:03Z | - |
| dc.identifier | Scientia Marina 70(1): 59-65 (2006) | - |
| dc.identifier | 0214-8358 | - |
| dc.identifier | http://hdl.handle.net/10261/2355 | - |
| dc.identifier | 10.3989/scimar.2006.70n159 | - |
| dc.identifier | 1886-8134 | - |
| dc.identifier.uri | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2355 | - |
| dc.description | [EN] An experimental study was carried out to investigate whether two potential predators such as Oxyrrhis marina (phagotrophic dinoflagellate) and Acartia margalefi (copepoda: calanoida) had different responses when feeding on toxic (Karlodinium sp.-strain CSIC1-) or non-toxic (Gymnodinium sp1) dinoflagellates with a similar shape and size. Both prey were cultured at different N/P ratios (balanced N/P = 15, and P-limited N/P > 15) to test whether P-limitation conditions could lead to depressed grazing rates or have other effects on the predators. Both predators ingested the non-toxic Gymnodinium sp1, and low or non-ingestion rates were observed when incubated with Karlodinium sp. The dinoflagellate O. marina did not graze at all on Karlodinium sp. at N/P > 15 and very little at NP = 15, as its net growth rates were always negative when feeding on Karlodinium sp. cultured under P-limitation conditions. A. margalefi had lower ingestion rates when feeding on Karlodinium sp. grown at N/P = 15 than when feeding on Gymnodinium sp1, and did not graze on P-limited Karlodinium sp. Nevertheless, feeding on Karlodinium sp. grown under N/P =15 or N/P > 15 did not have any paralyzing or lethal effect on A. margalefi after 24 h. Finally, a direct effect on the viability of A. margalefi eggs was detected when healthy eggs were incubated for 5 days in the presence of Karlodinium sp. grown under N/P =15 or N/P > 15, producing a decrease in viability of 20% and 60% respectively. | - |
| dc.description | [ES] Se estudió experimentalmente la respuesta de dos depredadores tales como Oxyrrhis marina (dinoflagelado fagotrófico) y Acartia margalefi (copepoda: calanoida) sobre dos dinoflagelados de tamaño y morfología similares, uno tóxico (Karlodinium sp. -cepa CSIC1-) y otro no tóxico (Gymnodinium sp1). Ambas presas fueron cultivadas a diferentes cocientes N/P para comprobar si la limitación por fósforo potenciaba el carácter disuasorio de Karlodinium sp., lo que induciría a menores tasas de ingestión y a la mortalidad de los depredadores. Ambos ingirieron el dinoflagelado no tóxico Gymnodinium sp1 y la depredación era baja o nula cuando fueron incubados con Karlodinium sp. O. marina no ingirió Karlodinium sp. en condiciones de limitación de P (N/P > 15) y las tasas de ingestión fueron muy bajas o nulas en condiciones de N/P =15. Las tasas de crecimiento siempre fueron negativas cuando Karlodinium sp. fue cultivado a N/P > 15. A. margalefi presentó tasas de ingestión mas bajas sobre Karlodinium sp. que sobre Gymnodinium sp1 y la depredación sobre Karlodinium sp. cultivado en condiciones de N/P > 15 fue despreciable. La ingestión sobre Karlodinium sp. cultivado a cocientes N/P = 15 ó N/P > 15 no tuvo ningún efecto paralizante o letal sobre A. Margalefi después de 24 h de incubación. Sin embargo, huevos de A. margalefi incubados con Karlodinium sp. a cocientes N/P = 15 ó N/P > 15 sufrieron una disminución del 20% o del 60%, respectivamente, de su viabilidad. | - |
| dc.description | This research was supported by the EU project BIOHAB (EVK3-CT99-00015) and MEC project MICROROL (CTM2004-02575). | - |
| dc.description | Peer reviewed | - |
| dc.language | eng | - |
| dc.publisher | Consejo Superior de Investigaciones Científicas (España) | - |
| dc.relation | http://dx.doi.org/10.3989/scimar.2006.70n159 | - |
| dc.rights | openAccess | - |
| dc.subject | Micro- and mesozooplankton (Oxyrrhis marina and Acartia margalefi) | - |
| dc.subject | toxic and non-toxic dinoflagellate (Karlodinium sp., Gymnodinium sp1) grazing rates, P-limitation, predator mortality, Karlodinium sp., egg viability, micro y mesozooplancton (Oxyrrhis marina y Acartia margalefi), dinoflagelados tóxicos y no tóxicos (Karlodinium sp., y Gymnodinium sp1), tasas de depredación, limitación por fósforo, mortalidad del depredador, viabilidad de huevos | - |
| dc.title | Effects of the toxic dinoflagellate Karlodinium sp. (cultured at different N/P ratios) on micro and mesozooplankton | - |
| dc.title | Efectos de un dinoflagelado tóxico sobre sus depredadores | - |
| dc.type | Artículo | - |
| Appears in Collections: | Digital Csic | |
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