کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4546277 | 1327503 | 2006 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of Karenia brevis diet on RNA:DNA ratios and egg production of Acartia tonsa
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
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![عکس صفحه اول مقاله: Effects of Karenia brevis diet on RNA:DNA ratios and egg production of Acartia tonsa Effects of Karenia brevis diet on RNA:DNA ratios and egg production of Acartia tonsa](/preview/png/4546277.png)
چکیده انگلیسی
Karenia brevis is a harmful alga associated with deleterious effects on zooplankton, but the exact cause (e.g. toxin, nutritional inadequacy or starvation) of these adverse effects is not clear. RNA:DNA ratios, fecundity and fecal pellet production of Acartia tonsa were measured on mono-algal and mixed-algal culture diets of K. brevis and Peridinium foliaceum to examine the usefulness of RNA:DNA ratios as an indicator of nutrition and to determine if adverse effects of K. brevis are due to the presence of toxins, poor nutritional quality or starvation. RNA:DNA ratios and egg production values were significantly higher for 100% P. foliaceum diet compared to 100% K. brevis diet. Significant differences in egg production, but not RNA:DNA ratios, were found between the various mixed diets, suggesting egg production is a more sensitive indicator of nutritional quality than RNA:DNA ratios. Changes in RNA:DNA ratios, fecundity and fecal pellet production of copepods fed two different toxic K. brevis strains were nearly identical, indicating that the presence of brevetoxins has little affect on A. tonsa. The similarity in RNA:DNA ratios, egg production, percent hatching and fecal production between the 100% K. brevis diet and starved copepods suggests that A. tonsa does not consume K. brevis when offered as its sole food source.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Harmful Algae - Volume 5, Issue 6, December 2006, Pages 693-704
Journal: Harmful Algae - Volume 5, Issue 6, December 2006, Pages 693-704
نویسندگان
Christa L. Speekmann, Cammie J. Hyatt, Edward J. Buskey,