1. The Largemouth Yellowfish (Labeobarbus kimberleyensis) Largemouth Yellowfish Festiville Elgro Lodge 10-05-2007 By Gordon O’Brien Phi 4:13

2. The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction What is a Largemouth Yellowfish?What is a Largemouth Yellowfish? How do they relate to other Yellowfish?How do they relate to other Yellowfish? Where do they occur?Where do they occur? What habitats do they prefer vs. Habitats that they need?What habitats do they prefer vs. Habitats that they need? What do they eat?What do they eat? Where and how do they breed?Where and how do they breed? What do we use these fishes for?What do we use these fishes for? How much do we know about these fishes?How much do we know about these fishes? Current research endeavours?Current research endeavours? How can you help?How can you help? Phi 4:13

3. The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction Phi 4:13

4. The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction Phi 4:13

5. Barbine Cyprinids  HexaploidBarbine Cyprinids  Hexaploid Scales have longitudinal striaeScales have longitudinal striae Extremely variable in shapeExtremely variable in shape Closely related to other smallscale Yellowfish.Closely related to other smallscale Yellowfish. Phi 4:13 What is a Largemouth Yellowfish

6. Phi 4:13 How do they relate to other Yellowfish

7. Phi 4:13 Where do they occur?

8. Based on the life cycle: Juvenile stage: larva vs. fry Fry – poor swimmers move out of current into sheltered waters away from predators. Pools, backwater area’s etc dominating marginal vegetation. No indication of any shoaling tendencies. Adolescence: Become superb swimmers – food requirements  migrate. After a few months fingerlings begin to move into diverse habitats, adolescence considered to be opportunistic  differ from Small mouth. Mature adult stage Advanced predatory phase – habitat use may be driven by breeding requirements. Bulking up phase – actively feed during warmer conditions in diverse habitats (temperatures relatively high) – Rapids to deep pools. Winter maintenance phase – move into more stable deeper water. Spawn in flowing water – possibly deep riffle/rapids. Eggs have ability to ahead (weakly) to substrates  double cell wall. Phi 4:13 What habitats do they prefer vs. habitats they need.

9. Phi 4:13 What habitats do they prefer vs. habitats they need. Kleynhans et. al. 2006

10. Juveniles (0-15cm) (0-15cm)Adolescence (15-30cm) (15-30cm) Adults 30+

12. 2 4 6 8 10 12 14

13. 2 4 6 8 10 12 14 16 18 20 22 24

14. The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction

15. Cambray JA and Jubb RA, 1977; Dispersal of fishes via the Orange-Fish tunnel, South Africa. Journal of the Limnological Society of southern Africa, 3(1): 33-35Cambray JA and Jubb RA, 1977; Dispersal of fishes via the Orange-Fish tunnel, South Africa. Journal of the Limnological Society of southern Africa, 3(1): 33-35 Dörgeloh WG, 1994; Diet and food selection of Barbus aeneus, Clarias gariepinus and Oncorhynchus mykiss in a clear man-made lake, South Africa. Water SA, 20:91-98Dörgeloh WG, 1994; Diet and food selection of Barbus aeneus, Clarias gariepinus and Oncorhynchus mykiss in a clear man-made lake, South Africa. Water SA, 20:91-98 Dörgeloh WG, 1995; Fish distribution in relation to turbidity gradients in a man-made lake, Sterkfontein Dam (South Africa). Water SA, 21: 95-99Dörgeloh WG, 1995; Fish distribution in relation to turbidity gradients in a man-made lake, Sterkfontein Dam (South Africa). Water SA, 21: 95-99 Gaigher IG, 1976; The reproduction of Barbus cf. kimberleyensis (Pisces, Cyprinidae) in the Hardap Dam, South West Africa. Zoologica Africana 11(1): 97-110Gaigher IG, 1976; The reproduction of Barbus cf. kimberleyensis (Pisces, Cyprinidae) in the Hardap Dam, South West Africa. Zoologica Africana 11(1): 97-110 Jubb RA and Farquharson FL, 1965; The freshwater fishes of the Orange River drainage basin. South African Journal of Science, 61: 118-124Jubb RA and Farquharson FL, 1965; The freshwater fishes of the Orange River drainage basin. South African Journal of Science, 61: 118-124 Mulder PFS, 1973; Aspects on the ecology of Barbus kimberleyensis and Barbus holubi in the Vaal River. Zoologica Africana 8(1): 1-14Mulder PFS, 1973; Aspects on the ecology of Barbus kimberleyensis and Barbus holubi in the Vaal River. Zoologica Africana 8(1): 1-14 Skelton, 1993; A complete Guide to the Freshwater Fishes of Southern Africa. Southern Book Publishers, Halfway HouseSkelton, 1993; A complete Guide to the Freshwater Fishes of Southern Africa. Southern Book Publishers, Halfway House Skelton, 2001; A complete Guide to the Freshwater Fishes of Southern Africa. Southern Book Publishers, Halfway HouseSkelton, 2001; A complete Guide to the Freshwater Fishes of Southern Africa. Southern Book Publishers, Halfway House Tómasson T, Cambray JA and Jackson PBN, 1984; Reproductive biology of four large riverine fishes (Cyprinidae) in a man made lake, Orange River, South Africa. Hydrobiologia, 112: 179-195Tómasson T, Cambray JA and Jackson PBN, 1984; Reproductive biology of four large riverine fishes (Cyprinidae) in a man made lake, Orange River, South Africa. Hydrobiologia, 112: 179-195 Phi 4:13

16. The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction What is a Largemouth Yellowfish?What is a Largemouth Yellowfish? How do they relate to other Yellowfish?How do they relate to other Yellowfish? Where do they occur?Where do they occur? What habitats do they prefer vs. Habitats that they need?What habitats do they prefer vs. Habitats that they need? What do they eat?What do they eat? Where and how do they breed?Where and how do they breed? What do we use these fishes for?What do we use these fishes for? How much do we know about these fishes?How much do we know about these fishes? Current research endeavours?Current research endeavours? How can you help?How can you help? Phi 4:13

17. The Largemouth Yellowfish (Labeobarbus kimberleyensis) THANK YOU 084 580 4161 econ@uj.ac.za Phi 4:13