کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6387912 | 1627589 | 2014 | 7 صفحه PDF | دانلود رایگان |

- We test the effects of the polyunsaturated aldehyde (PUA) decadienal (DD) on copepod fitness.
- DD induced high mortality of Temora stylifera adults with highest mortality in males.
- DD affected egg hatching success and provoked high naupliar apoptosis.
- At low concentrations ingestion rates increased and DD was detected in odor choice experiments.
- This is the first study showing that PUAs may act as feeding attractants for some copepods.
Many diatoms, a major class of unicellular algae contributing to over 45% of oceanic primary production, are known to induce deleterious effects on reproductive processes in crustacean copepods. This is mainly due to the production of teratogenic oxylipins, including polyunsaturated aldehydes (PUAs). Here we tested the direct effect of the PUA 2E,4E-decadienal (DD) on feeding activity, survivorship and reproductive success of the calanoid copepod Temora stylifera. DD-inoculated cultures induced high mortality at concentrations above 3 μg mLâ1 compared to controls in both males and females, with males having a higher mortality. Low DD concentrations triggered an increase in female filtration and ingestion rates. Egg production rates and hatching times were also higher in the presence of DD, whereas egg hatching success decreased with increasing DD concentration. Our study shows, for the first time, that the presence of diatom PUAs may increase feeding rates in copepods.
Journal: Marine Environmental Research - Volume 93, February 2014, Pages 31-37