Table 3 Probabilities to reject mutation-drift equilibrium due to heterozygote deficiency or heterozygote excess (genetic bottleneck) for three different mutation models (IAM = infinite allele model, TPM = two-phase mutation model, SMM = stepwise mutation model) in tabanid populations from unaffected and oiled areas.

From: Recovery of horse fly populations in Louisiana marshes following the Deepwater Horizon oil spill

 

Non-oiled areas 2015

Non-oiled areas 2016

Oiled areas 2015

Oiled areas 2016

SC-2015

CP-2015

SC/RWR-2016

SCO-2016

CP-2016

CYO2016

CYRC-2016

GI-2015

EI-2015

GB-2015

GI-2016

EI-2016

GB-2016

One-tailed Wilcoxon-test

for heterozygote deficiency

IAM

>0.20

>0.20

>0.20

>0.20

0.004

>0.20

>0.20

>0.20

>0.20

>0.20

0.065

>0.20

>0.20

TPM

>0.20

>0.20

0.041

>0.20

0.008

>0.20

0.008

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

SMM

>0.20

0.03

0.006

0.037

0.008

>0.20

0.008

0.15

0.16

>0.20

0.002

0.016

0.02

for heterozygote excess

IAM

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

0.16

>0.20

0.08

>0.20

TPM

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

SMM

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

>0.20

  1. None of the populations showed genetic bottlenecks in 2015 or 2016 regardless whether the area was oiled in 2010 or remained unaffected. Note, that in 2010/2011 6 out of 7 populations from oiled locations showed signatures of genetic bottlenecks18.