PMID- 25715602
OWN - NLM
STAT- MEDLINE
DCOM- 20150331
LR  - 20150226
IS  - 0006-3029 (Print)
IS  - 0006-3029 (Linking)
VI  - 59
IP  - 3
DP  - 2014 May-Jun
TI  - [Modeling the occurrence of shellfish poisoning outbreaks caused by Gymnodinium 
      catenatum (Dinophyceae) through electromagnetic signal triggering].
PG  - 565-78
AB  - Accumulation of paralytic shellfish poisoning toxins (PSTs) in bivalves 
      attributed to Gymnodinium catenatum blooms at the NW Portuguese coast was 
      previously associated with periods of low solar activity (measured by the radio 
      flux [R]), or low geomagnetic A(a) index. It was also observed that reduction of 
      R preceded the occurrence of toxin accumulation, while A(a) index increase could 
      be related to its absence during periods of low activity. For modeling toxin 
      accumulation, the monthly decrease in R was studied along the decade 2003-2012. A 
      match that helped explaining the highly toxic years of 2007 and 2008 was obtained 
      by plotting the formula: DeltaR = (R(n-1) - R(n))/(R(n) - 65)2, where 65 represented 
      the lowest radio activity known to date. The complex denominator was required to 
      take into account the sunspot cycle. A 1-2 month lag was observed between maximal 
      relative decline and maximal PSTs accumulation. PSTs in bivalves from the 
      Portuguese south coast were related with natural electromagnetic cycles for the 
      first time, and were not statistically associated with low R. A statistically 
      significant association with low A(a) index also was not achieved, due to the low 
      number of occurrences, although the 25-75 percentile was restricted to low Aa 
      indexes in a similar way to that found for the NW coast. PSTs accumulation 
      outside solar minima could be triggered by a steep decline in the A(a) index 
      (DeltaA), but no lag was observed in this case. While DeltaR amplitude helped explaining 
      the highly toxic years of 2007 and 2008 at the NW coast, the amplitude of DeltaA was 
      not related to the severity of the accumulation. Other kind of local 
      electromagnetic signaling was investigated resorting to the occurrence of 
      seismologic phenomena, because these events can trigger electric activities. No 
      statistical association was found between seism number or magnitude and PSTs at 
      the south coast, located near the boundary between the African and Eurasian 
      plates, and marked by moderate seismicity.
FAU - Vale, Pulo
AU  - Vale P
LA  - rus
PT  - English Abstract
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Russia (Federation)
TA  - Biofizika
JT  - Biofizika
JID - 0372666
RN  - 0 (Marine Toxins)
SB  - IM
MH  - Animals
MH  - Dinoflagellida/*metabolism
MH  - *Disease Outbreaks
MH  - Female
MH  - Harmful Algal Bloom/*radiation effects
MH  - Humans
MH  - Male
MH  - Marine Toxins/*metabolism
MH  - *Models, Biological
MH  - Portugal/epidemiology
MH  - *Shellfish Poisoning/epidemiology/etiology
MH  - *Sunlight
EDAT- 2015/02/27 06:00
MHDA- 2015/04/01 06:00
CRDT- 2015/02/27 06:00
PHST- 2015/02/27 06:00 [entrez]
PHST- 2015/02/27 06:00 [pubmed]
PHST- 2015/04/01 06:00 [medline]
PST - ppublish
SO  - Biofizika. 2014 May-Jun;59(3):565-78.