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DFP project – Summer 2015 An Investigation of Captive Reproduction Methods in the Comanche Springs Pupfish Cyprinodon elegans

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Page 1: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

DFP project – Summer 2015An Investigation of Captive

Reproduction Methods in the Comanche Springs Pupfish

Cyprinodon elegans

Page 2: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Background - Conservation Listed as endangered by USFWS in 1967

- part of first listed species under 1966 Endangered Species Preservation Act

Comanche Springs Pupfish are currently found only in 3 springs and 1 creek in TX:

Phantom Lake Spring, San Solomon Spring, Giffin Spring, and Toyah Creek near Balmorhea, Texas

Major Threats:- over pumping of

groundwater- habitat alterations- hybridization

Page 3: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Background - Breeding Typically breed during warmer months (summer) Mating System: - Territorial (large ♂)

- Satellite (medium ♂) - Sneaker (small ♂)

Lay eggs singly, up to 30 per day in a territory Short lifespan - lives 1 to 2 years

♀ ♂

Page 4: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

DFP project Objectives

1. Experiment 1: Determine the success rates of pairwise mating of Comanche Springs pupfish in aquaria (e.g., 1M:1F)

2. Experiment 2: Determine if blocking sight to adjacent aquaria increases egg deposition

3. Experiment 3: Determine if 2 females paired with 1 male increases egg deposition

4. Estimate fecundity and gonadosomatic index (GSI)

Page 5: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Methods

5 gallon aquaria, spawning tray w/ a spawning pad held in place by 2 rocks, air-stone, flow-through using a slow rate of input, visual barriers

Page 6: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Results Overall (all experiments combined)

- 759 eggs deposited- 62 fry

Experiment 1: 1M:1F pairs- 102 eggs- 3 fry

Experiment 2: Blocked vision- 71 eggs- 0 fry

Experiment 3: 1M:1F vs 1M:2F- 586 eggs- 59 fry

Page 7: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Comanche Springs Pupfish eggs (~1.5 mm)

Newly deposited eggs Eggs 48-hours after

fertilization

Page 8: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Mycosis

Mycotic

infections in

~82% of eggs

Page 9: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Comanche Springs Pupfish fry (~4 mm)

~ 7 days old close up

Page 10: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Observations

Aggressive males # of mortalities - 48 females - 2 males

Page 11: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

Acknowledgements Thank you Uvalde NFH crew Thanks for feeding my fry Ruben ! Thank you so much to all who participated in

making the DFP program happen !! Thanks to all Region 2 staff for organizing this

gathering And thanks to the !

Page 12: Listed as endangered by USFWS in 1967 - part of first listed species under 1966 Endangered Species Preservation Act Comanche Springs Pupfish are currently

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