gene flow between populations in the alapaha and santa fe rivers joseph a. kirkley biology 7020...

Gene Flow Between Populations in the Alapaha and Santa Fe

RiversJoseph A. Kirkley

Biology 7020

Spring 2010

Background

• Alapaha River– Originates in Dooly

Co. GA– Flows SW to the

Suwannee– Subterranean Flow for

approximately 30km during normal water levels

– Floods in times of high water

• Santa Fe River– Originates in Alachua

Co. FL– Flows SE to the

Suwannee– Subterranean Flow for

approximately 3.2km during normal water levels

– Floods in times of high water

Maximum Likelihood estimates for Upper and Lower Alapaha (Micropterus salmoides)

Population [x]

Loc. Ln(L/L0) Theta (# of migrants/generation)

M (m/mu)

(Migration Rate/Mutation rate)

[+=receiving population]

[x Ne mu] Donor Pop 1,+

Donor Pop 2,+

1:Upper 1 0.634 0.0110 - 5.663

2: Lower 1 0.634 6.45e+10 59.285 -

Maximum Likelihood estimates for Upper and Lower Santa Fe (Micropterus

salmoides)Population [x]

Loc. Ln(L/L0) Theta (# of migrants/generation)

M (m/mu)

(Migration Rate/Mutation rate)

[+=receiving population]

[x Ne mu] Donor Pop 1,+

Donor Pop 2,+

1:Upper 1 93.083 0.0092 - 3.07e-07

2: Lower 1 93.083 0.2038 53.986 -

Maximum Likelihood estimates for Alapaha verses Santa Fe (Micropterus salmoides)

Population [x]

Loc. Ln(L/L0) Theta (# of migrants/generation)

M (m/mu) (Migration Rate/Mutation rate)

[+=receiving population]

[x Ne mu] Donor Pop 1,+

Donor Pop 2,+

1:Upper 1 15.590 0.0125 - 158.54

2: Lower 1 15.590 0.0476 536.38 -

Acknowledgements

Dr. John F. Elder for his patience and guidance

Dr. David Bechler for his $0.02

Landon Lasseter for without him none of this would have been possible

Josh Rouse for preliminary analysis and field work

References

Beerli, P and J. Felsenstein (1999) Maximum-likelihood estimation of migration ratres and effective population numbers in two poopulations using a coalescent approach. Genetics, 152(2):763-73 1999

Beerli, P. and J. Felsenstein (2001) Maximum likelihood estimation of a migration matrix and effective population sizes in n subpopulations by using a coalescent approach. Proceedings of the National Academy of Sciences of the USA, 98(8):4563-4568