* Feeding by heterotrophic dinoflagellates and ciliates on the free-living dinoflagellate Symbiodinium sp. (Clade E).
- To investigate heterotrophic protists grazing on Symbiodinium sp., we tested whether the common heterotrophic dinoflagellates Gyrodinium dominans, Gyrodinium moestrupii, Gyrodinium spirale, Oblea rotundata, Oxyrrhis marina, and Polykrikos kofoidii and the ciliates Balanion sp. and Parastrombidinopsis sp. preyed on the free-living dinoflagellate Symbiodinium sp. (clade E). We measured the growth and ingestion rates of O. marina and G. dominans on Symbiodinium sp. as a function of prey concentration. Furthermore, we compared the results to those obtained for other algal prey species. In addition, we measured the growth and ingestion rates of other predators at single prey concentrations at which these rates of O. marina and G. dominans were saturated. All predators tested in the present study, except Balanion sp., preyed on Symbiodinium sp. The specific growth rates of O. marina and G. dominans on Symbiodinium sp. increased rapidly with increasing mean prey concentration < ca. 740-815 ng C/ml (7,400-8,150 cells/ml), but became saturated at higher concentrations. The maximum growth rates of O. marina and G. dominans on Symbiodinium sp. (0.87 and 0.61/d) were much higher than those of G. moestrupii and P. kofoidii (0.11 and 0.04/d). Symbiodinium sp. did not support positive growth of G. spirale, O. rotundata, and Parastrombidinopsis sp. However, the maximum ingestion rates of P. kofoidii and Parastrombidinopsis sp. (6.7-10.0 ng C/predator/d) were much higher than those of O. marina and G. dominans on Symbiodinium sp. (1.9-2.1 ng C/predator/d). The results of the present study suggest that Symbiodinium sp. may increase or maintain the populations of some predators.
=>出席している, そこにある, 現在の, 今の, 当面の, いあわせている, 考慮している, 現在, を人に贈る,
進呈する, を与える, を渡す, を紹介する, を公開する, を見せる, 示す, 贈り物, 【文法】現在時制の,
プレゼント, 贈る, ある, 現在形の
Overview of noun present
The noun present has 3 senses (first 2 from tagged texts)
1. (17) present, nowadays -- (the period of time that is happening now; any continuous stretch of
time including the moment of speech; "that is enough for the present"; "he lives in the present with
no thought of tomorrow")
2. (4) present -- (something presented as a gift; "his tie was a present from his wife")
3. present, present tense -- (a verb tense that expresses actions or states at the time of speaking)
Overview of verb present
The verb present has 13 senses (first 10 from tagged texts)
1. (40) show, demo, exhibit, present, demonstrate -- (give an exhibition of to an interested
audience; "She shows her dogs frequently"; "We will demo the new software in Washington")
2. (28) present, represent, lay out -- (bring forward and present to the mind; "We presented the
arguments to him"; "We cannot represent this knowledge to our formal reason")
3. (14) stage, present, represent -- (perform (a play), especially on a stage; "we are going to
stage `Othello'")
4. (13) present, submit -- (hand over formally)
5. (7) present, pose -- (introduce; "This poses an interesting question")
6. (3) award, present -- (give, especially as an honor or reward; "bestow honors and prizes at
graduation")
7. (3) give, gift, present -- (give as a present; make a gift of; "What will you give her for her
birthday?")
8. (3) deliver, present -- (deliver (a speech, oration, or idea); "The commencement speaker
presented a forceful speech that impressed the students")
9. (2) introduce, present, acquaint -- (cause to come to know personally; "permit me to acquaint you
with my son"; "introduce the new neighbors to the community")
10. (1) portray, present -- (represent abstractly, for example in a painting, drawing, or sculpture;
"The father is portrayed as a good-looking man in this painting")
11. confront, face, present -- (present somebody with something, usually to accuse or criticize; "We
confronted him with the evidence"; "He was faced with all the evidence and could no longer deny his
actions"; "An enormous dilemma faces us")
12. present -- (formally present a debutante, a representative of a country, etc.)
13. salute, present -- (recognize with a gesture prescribed by a military regulation; assume a
prescribed position; "When the officers show up, the soldiers have to salute")
Overview of adj present
The adj present has 2 senses (first 2 from tagged texts)
1. (60) present -- (temporal sense; intermediate between past and future; now existing or happening
or in consideration; "the present leader"; "articles for present use"; "the present topic"; "the
present system"; "present observations")
2. (39) present -- (being or existing in a specified place; "the murderer is present in this room";
"present at the wedding"; "present at the creation")
--- WordNet end ---