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