Non-migratory Freshwater Fish Distribution

Knowledge of, and identification of the distribution of species and communities provides a basis for effective conservation (Leathwick et al. 2008). The concept to recognise sub-populations within species and represent distributions as presented here, and the use of these as a management tool, came about from the identification and development of the spatial distributions of Canterbury mudfish for the Canterbury Regional Council Natural Resources Regional Plan - Water Quantity (Canterbury Regional Council 2011) as described in O’Brien & Dunn (2007). Habitat fragments also allow for effective management, delivery planning, and reporting, and have been used in the Department’s species prioritisation process, the New Zealand Threat Classification System conservation status assessments of freshwater fish (area of occupancy, and number of sub-populations), and assessment of the effects of Conservation Act concession and Resource Management Act consent applications.The report by Dunn (2017) describes the methods used to develop these geospatial files representing known habitat fragments of non-migratory freshwater fish species within the genera Galaxias, Neochanna (both Family Galaxiidae; galaxias and mudfish respectively), and Gobiomorphus (Family Eleotridae; bullies) as they typically have specific geographical distributions, and occur in discrete areas. These species also have conservation status’ of threatened or at risk and hence, there is a requirement to adequately manage their habitats to ensure persistence of the species. Work has also been undertaken to spatially identify known landlocked sub-populations of facultative diadromous species. Identification of catchments containing migratory sub-populations of these species is underway using a different approach and is not reported on further here.Canterbury Regional Council 2011: Canterbury Natural Resources Regional Plan – Chapter 5 Water Quantity. Canterbury Regional Council, Christchurch, New Zealand. 214 p.Dunn, N.R. 2017: Mapping of non-migratory freshwater fish habitat fragment distributions. Unpublished report, Freshwater Team, Science & Policy, Department of Conservation, Wellington, New Zealand. 22 p.Leathwick, J.R.; Julian, K.; Elith, J.; Rowe, D.L. 2008: Predicting the distributions of freshwater fish species for all New Zealand's rivers and streams. NIWA Client Report HAM2008-005 prepared for Department of Conservation. National Institute of Water and Atmospheric Research, Hamilton, New Zealand. 56 p.O'Brien, L.K.; Dunn, N.R. 2007: Preliminary Canterbury mudfish (Neochanna burrowsius) sub-population assessment. Client report to Canterbury Conservancy, Department of Conservation. Ichthyo-niche, Dunedin, New Zealand. 143 p.Six new fields were added when the dataset was last revised (31 March 2021): DOC Region, DOC District, Regional Council, District Council, Status, Spatial order.The full report is available here

Data and Resources

Additional Info

Field Value
Theme ["geospatial"]
Author DOC_admin
Maintainer DOC_admin
Source Created 2021-11-10T21:39:29.000Z
Source Modified 2022-11-02T01:44:38.564Z
Language English
Spatial { "type": "Polygon", "coordinates": [ [ [167.4610, -47.1574], [-177.9055, -47.1574], [-177.9055, -34.2039], [167.4610, -34.2039], [167.4610, -47.1574] ] ] }
Source Identifier
Dataset metadata created 24 August 2022, last updated 23 November 2022