19 C
Mossel Bay
8th Feb 2023
Community & LivingNature & Nurture

Alien Fish in the Moordkuil

Wendy Wiles

Summertime and the living is easy, fish are jumping and the cotton is high…

Recently my friend Sally was walking along her stretch of the Moordkuil River (which feeds in to the Little Brak River), when she came across a seething, shiny mass of African sharptooth cat fish in the shallows! Their scientific name, Clarias gariepinus, clearly makes them inhabitants of South Africa, and the rest of Africa, as the first one was found and identified in the Gariep (Orange) River. They don’t belong in the Western Cape at all however and are therefore regarded as invasive aliens in our river systems. They grow rapidly to their full size of 1 ­­- 1.5 metres and 60 kgs and gobble up any smaller indigenous fish they can find. They are consequently bad news for our rivers.

One might wonder how these fish came to be in the Moordkuil. They are inadvertent escapees from a fish farm, or more likely in this case a fisherman introduced them into the river as they are good to catch and eat! For these reasons in the 1980s they were spread all over the world.

Related posts

Going local: Botlierskop

Wendy Wiles

MOBIELE ETES VIR BEJAARDES

Meals On Wheels

WINDE VAN VERANDERING! TYD OM TE BESIN!

Wilhelm de Wet

A DOLPHIN IN THE DESERT

Gillian Dugmore

EERSTE GB WALK: INGESEËN MET HEERLIKE REËN!

Laurinda Smit

BEST BIRDING SPOTS IN THE GARDEN ROUTE

Christaan Viljoen