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The Largemouth Yellowfish (Labeobarbus kimberleyensis) Largemouth Yellowfish Festiville Elgro Lodge 10-05-2007 By Gordo

Phi 4:13. The Largemouth Yellowfish (Labeobarbus kimberleyensis) Largemouth Yellowfish Festiville Elgro Lodge 10-05-2007 By Gordon O’Brien. Phi 4:13. The Largemouth Yellowfish Introduction What is a Largemouth Yellowfish? How do they relate to other Yellowfish? Where do they occur?

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The Largemouth Yellowfish (Labeobarbus kimberleyensis) Largemouth Yellowfish Festiville Elgro Lodge 10-05-2007 By Gordo

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

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

  3. Phi 4:13 • The Largemouth Yellowfish Introduction

  4. Phi 4:13 • The Largemouth Yellowfish Introduction

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

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

  7. Where do they occur? Phi 4:13

  8. What habitats do they prefer vs. habitats they need. Phi 4:13 • 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.

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

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

  11. 2 4 6 8 10 12 14

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

  13. The Largemouth Yellowfish Introduction

  14. Phi 4:13 • 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): 33-35 • 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, 20:91-98 • Dörgeloh 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): 97-110 • Jubb 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): 1-14 • Skelton, 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 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: 179-195

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

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

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