the largemouth yellowfish (labeobarbus kimberleyensis) largemouth yellowfish festiville elgro lodge...
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The Largemouth YellowfishThe Largemouth Yellowfish
(Labeobarbus kimberleyensis)
Largemouth Yellowfish Festiville Elgro Lodge Largemouth Yellowfish Festiville Elgro Lodge
10-05-200710-05-2007
By Gordon O’BrienBy Gordon O’Brien
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• 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?
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• The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction
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• The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction
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• Barbine Cyprinids Barbine Cyprinids Hexaploid Hexaploid
• Scales have longitudinal striaeScales have longitudinal striae
• Extremely variable in shapeExtremely variable in shape
• Closely related to other Closely related to other smallscalesmallscale Yellowfish. Yellowfish.
Phi 4:13Phi 4:13What is a Largemouth Yellowfish
Phi 4:13Phi 4:13How do they relate to other Yellowfish
Phi 4:13Phi 4:13Where do they occur?
• 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 4:13Phi 4:13What habitats do they prefer vs. habitats they need.
Phi 4:13Phi 4:13What habitats do they prefer vs. habitats they need.
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Juveniles Juveniles
(0-15cm)(0-15cm)
Adolescence Adolescence
(15-30cm)(15-30cm)
Adults 30+Adults 30+
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• The Largemouth Yellowfish IntroductionThe Largemouth Yellowfish Introduction
• Cambray JA and Jubb RA, 1977; Dispersal of fishes via the Orange-Fish tunnel, South Cambray JA and Jubb RA, 1977; Dispersal of fishes via the Orange-Fish tunnel, South
Africa. Africa. Journal of the Limnological Society of southern Africa, 3(1): 33-35Journal of the Limnological Society of southern Africa, 3(1): 33-35
• Dörgeloh WG, 1994; Diet and food selection of Dörgeloh WG, 1994; Diet and food selection of Barbus aeneusBarbus aeneus, , Clarias gariepinus Clarias gariepinus and and
Oncorhynchus mykiss Oncorhynchus mykiss in a clear man-made lake, South Africa. Water SA, in a clear man-made lake, South Africa. Water SA,
20:91-98 20:91-98
• Dörgeloh WG, 1995; Fish distribution in relation to turbidity gradients in a man-made Dörgeloh WG, 1995; Fish distribution in relation to turbidity gradients in a man-made
lake, lake, Sterkfontein Dam (South Africa). Water SA, 21: 95-99 Sterkfontein Dam (South Africa). Water SA, 21: 95-99
• Gaigher IG, 1976; The reproduction of Gaigher IG, 1976; The reproduction of Barbus Barbus cf. cf. kimberleyensis kimberleyensis (Pisces, Cyprinidae) (Pisces, Cyprinidae)
in the in the Hardap Dam, South West Africa. Zoologica Africana 11(1): 97-110 Hardap Dam, South West Africa. Zoologica Africana 11(1): 97-110
• Jubb RA and Farquharson FL, 1965; The freshwater fishes of the Orange River Jubb RA and Farquharson FL, 1965; The freshwater fishes of the Orange River
drainage drainage basin. South African Journal of Science, 61: 118-124basin. South African Journal of Science, 61: 118-124
• Mulder PFS, 1973; Aspects on the ecology of Mulder PFS, 1973; Aspects on the ecology of Barbus kimberleyensis Barbus kimberleyensis and and Barbus Barbus
holubi holubi in the in the Vaal River. Zoologica Africana 8(1): 1-14Vaal River. Zoologica Africana 8(1): 1-14
• Skelton, 1993; A complete Guide to the Freshwater Fishes of Southern Africa. Skelton, 1993; A complete Guide to the Freshwater Fishes of Southern Africa.
Southern Book Southern Book Publishers, Halfway HousePublishers, Halfway House • Skelton, 2001; A complete Guide to the Freshwater Fishes of Southern Africa. Skelton, 2001; A complete Guide to the Freshwater Fishes of Southern Africa.
Southern Book Southern Book Publishers, Halfway House Publishers, Halfway House
• Tómasson T, Cambray JA and Jackson PBN, 1984; Reproductive biology of four large Tómasson T, Cambray JA and Jackson PBN, 1984; Reproductive biology of four large
riverine fishes (Cyprinidae) in a man made lake, Orange River, South riverine fishes (Cyprinidae) in a man made lake, Orange River, South
Africa. Africa. Hydrobiologia, 112: 179-195Hydrobiologia, 112: 179-195
Phi 4:13Phi 4:13
• 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 4:13Phi 4:13
The Largemouth YellowfishThe Largemouth Yellowfish
(Labeobarbus kimberleyensis)
THANK YOUTHANK YOU
084 580 4161084 580 4161
Phi 4:13Phi 4:13