The effect of the toxic dinoflagellate Alexandrium fundyense on the fitness of the calanoid copepod Calanus finmarchicus
| Autor: | Jefferson T. Turner, Petra H. Lenz, Vittoria Roncalli, Donald M. Anderson, David M. Kulis |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Harmful Algal Bloom Calanus finmarchicus Population Zoology Plant Science Aquatic Science 010603 evolutionary biology 01 natural sciences Algal bloom Article Copepoda medicine Animals Maine Paralytic shellfish poisoning education education.field_of_study biology Ecology 010604 marine biology & hydrobiology fungi Dinoflagellate biology.organism_classification medicine.disease Diet Alexandrium fundyense Dinoflagellida Female Marine Toxins Rhodomonas Copepod |
| Zdroj: | Harmful Algae. 51:56-66 |
| ISSN: | 1568-9883 |
| Popis: | Inshore and offshore waters of the Gulf of Maine (USA) have spring/summer harmful algal blooms (HABs) of the toxic dinoflagellate Alexandrium fundyense , which is responsible for paralytic shellfish poisoning (PSP) in humans. The calanoid copepod Calanus finmarchicus co-occurs with A. fundyense during the seasonal blooms. At that time, C. finmarchicus population abundances are high, dominated by immature copepods preparing for diapause, and by actively-reproducing adults. High survival has been reported for copepods exposed to toxic A. fundyense , but little is known about possible sublethal effects. In this study, C. finmarchicus adult females were fed either a control diet of non-toxic Rhodomonas spp. or one of two diets containing either low dose (LD) or high dose (HD) levels (50 and 200 cells mL −1 , respectively) of toxic A. fundyense for a total of 7 days in two independent experiments. As expected, ingestion of the dinoflagellate had no effect on copepod survival and grazing activity. However, significant reductions of egg production and egg viability were observed in C. finmarchicus females fed on either experimental diet . After the 7-day experiment, total nauplius production by females on the LD and HD diets was reduced by 35% to 75% compared to the control females. These results suggest that blooms of A. fundyense in the Gulf of Maine may be an environmental challenge for C. finmarchicus populations, with a potential negative effect on copepod recruitment. |
| Databáze: | OpenAIRE |
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