Image related to website content

Fish and Forests: Sampling the rivers of the Garden Route Nature Reserve Complex

1 Mar 2024 by Drs Martine Jordaan & Marienne de Villiers

A baseline survey of the Garden Route Nature Reserve complex was completed in January 2024 to provide updated information on the freshwater fish community of the reserve complex and inform future management interventions. Data from these surveys also feed into Red List Assessments for freshwater fish and provide decision support for land-use decision-making. The reserve complex spans several river systems, including the Gouritz and the headwaters of many of the smaller coastal catchments of the Garden Route. The river types sampled range from muddy ‘karoo’ type rivers on the northern side of the Outeniqua mountains to the dark and mysterious peat-stained rivers typical of the Garden Route. Different river types mean different fish species and six indigenous fish species were detected. These include three different redfin species, the Cape kurper, Cape galaxias and the migratory longfin eel.

Image related to website content

Deploying a fyke net in the Silwer River upstream of Wilderness.

Image related to website content

Contagious collaboration: staff from CapeNature and SANParks sampling in the headwaters of the Swart River upstream of Garden Route Dam.

For most sites, the habitat was in good condition, but for some of the sites located outside of the reserve boundary, some human-induced impacts on river health were observed. In addition to providing fish sampling training to regional staff, the survey also provided the opportunity to work together with colleagues from SANParks to exchange knowledge and plan future conservation collaborations.

Image related to website content

The dark waters of the aptly named Swart River, home to the indigenous Cape kurper Sandelia capensis and Cape galaxias Galaxias zebratus.

Share:

Related News

20230516 120930
22 Jul 2024
CapeNature aims to stop rising wildlife crime numbers in the Western Cape

Illegal succulent plant trade remains the most pervasive wildlife crime in the Western Cape with most plants earmarked for illicit trade in East Asia, where most of the plants are sold to plant collectors and nurseries.

20240705 111126
5 Jul 2024
The secret of CapeNature’s new ambassador is out!

CapeNature is thrilled to announce the identity of its new Cubs Club ambassador, Kai the Cape leopard cub. Kai was introduced to the public and a group of Cubs Club members on Friday, 5 July 2024, for the very first time.

Dr Ashley Naidoo Minister Anton Bredell Prof Tyrone Pretorius HOD Gerhard Gerber
28 Jun 2024
CapeNature Conservation Review 2024 brings excellence in sustainable conservation practices to the forefront

CapeNature showcased its achievements realised through its dedication to fostering sound governance, innovative eco-tourism offerings, successful conservation operations, and exceptional biodiversity protection at its CapeNature Conservation Review 2024.

DSC 4796
7 Jun 2024
Restoration: Helihack

CapeNature participated in the Boosmansbos Helihack to remove invasive species from the Duiwenhoks catchment in the Langeberg Strategic Water Source Area. The Helihack initiative is an extraordinary commitment by volunteers to rid catchments of the most difficult-to-manage invasive alien trees.

Fresh water fish
7 Jun 2024
Freshwater fish survey, Chanting Ridge Stewardship Site

CapeNature conducted a mini freshwater fish survey through the Leslie Hill Succulent Karoo Trust stewardship project at a site on the Touws River. The survey involved landowners from two properties, the Chanting Ridge stewardship site and Bellair.

Picture 112
5 Apr 2024
Guardians of the galaxias: How partnerships are key to identification and conservation of unique fynbos fish taxa

The Cape galaxias, Galaxias zebratus, are a small-bodied freshwater fish with a wide distribution in the Cape Fold Ecoregion. While being described as far back as 1861, it was only recently discovered that the single widespread species is a species complex comprising several unique and genetically diverse lineages.