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Water SA

On-line version ISSN 1816-7950
Print version ISSN 0378-4738


JACOBS, Francois Jakob et al. First observation of fouling of externally attached radio transmitters in an African river. Water SA [online]. 2020, vol.46, n.4, pp.672-674. ISSN 1816-7950.

Fouling of externally attached tags is an important consideration in long-term tagging studies as it may affect fish behaviour and well-being. Two externally attached radio transmitters on African tigerfish Hydrocynus vittatus were covered with short green algae, after the fish were recaptured 49 and 64 days after tagging in the Kavango River, Namibia. This is the first observation of fouling on external radio transmitters from any African river which highlights the importance of conducting studies that evaluate the various health or behavioural effects resulting from tagging.

Keywords : freshwater; fouling; Kavango River; tagging; tigerfish; Namibia.

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