Boat electrofishing survey of Apata Pond and Lake McLaren

Hicks, Brendan J.; Bell, Dudley G.; Ring, C. Alex; Tempero, Grant Wayne

Boat electrofishing survey of Apata Pond and Lake McLaren

dc.contributor.author	Hicks, Brendan J.
dc.contributor.author	Bell, Dudley G.
dc.contributor.author	Ring, C. Alex
dc.contributor.author	Tempero, Grant Wayne
dc.date.accessioned	2010-04-11T21:47:16Z
dc.date.available	2010-04-11T21:47:16Z
dc.date.issued	2004
dc.description.abstract	We used New Zealand’s first successful electrofishing boat to catch koi carp (Cyprinus carpio haemaotopterus; Zhou et al. 2003) and rudd (Scardinius erythophthalmus) at two sites in the Bay of Plenty, North Island, New Zealand. Five large koi carp were caught in a pond near Apata; shortfinned eels and adult inanga were also caught. In Lake McLaren, a small hydro-electric impoundment on the Wairoa River, two rudd were caught; longfinned eels (Anguilla dieffenbachii), common bullies (Gobiomorphus cotidianus), and brown and rainbow trout (Salmo trutta and Oncorhynchus mykiss) were also caught. Low ambient conductivities (43-90 µS cm⁻¹) is likely to have restricted the electrofishing field and power transfer to the fish, but fish capture was still successful. Clear water compensated somewhat for the reduced effectiveness of the field. Fish densities were low at both locations. The minimum fish density was 0.31 fish 100 m⁻² in the pond at Apata, and 0.61 fish 100 m⁻² in Lake McLaren. These should be regarded as minimal densities because only a single pass was conducted. All the koi carp caught in the pond at Apata were 521 to 564 mm fork length and all were 8 years old; there were two males and three females. One female was about to spawn; however, no other koi carp were found, so breeding appears to have been unsuccessful in this habitat. The two rudd from Lake McLaren were 203 and 240 mm fork length 6 and 7 years old respectively. Thought no younger age classes were caught, we cannot exclude the possibility that rudd could reproduce successfully in Lake McLaren.	en
dc.format.mimetype	application/pdf
dc.identifier.citation	Hicks, B.J., Bell, D.G., Ring, C.A. & Tempero, G.W. (2004). Boat electrofishing survey of Apata Pond and Lake McLaren. CBER Contract Report No. 33, client report prepared for the Department of Conservation, Bay of Plenty Conservancy, and Environment Bay of Plenty. Hamilton, New Zealand: Centre for Biodiversity and Ecology Research, Department of Biological Sciences, The University of Waikato.	en
dc.identifier.uri	https://hdl.handle.net/10289/3779
dc.language.iso	en
dc.publisher	University of Waikato	en_NZ
dc.relation.ispartofseries	CBER Contract Report
dc.relation.uri	http://cber.bio.waikato.ac.nz/	en
dc.subject	New Zealand	en
dc.subject	Lake McLaren	en
dc.subject	fish	en
dc.subject	koi carp	en
dc.subject	Bay of Plenty	en
dc.title	Boat electrofishing survey of Apata Pond and Lake McLaren	en
dc.type	Commissioned Report for External Body	en
pubs.elements-id	52967
pubs.place-of-publication	Hamilton	en_NZ
uow.relation.series	No.33