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Operational Report for Possum, Ship Rat, Stoat Control in the Kahurangi Bfob

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EPA Report: Verified Source: Pestlink Operational Report for Possum, Ship rat, Stoat Control in the Kahurangi BfoB 09 Sep 2016 - 28 Feb 2017 23/06/2017 Department of Conservation Motueka Contents 1. Operation Summary Operation Name Possum, Ship rat, Stoat Control in Kahurangi BfoB Operation Date 09 Sep 2016 - 28 Feb 2017 District Motueka Region: Northern South Island Pestlink Reference 1617MOT01 Treatment Area Kahurangi BfoB Size (ha) 296403.00 Conservation Unit Name(s) GA Id(s) Kahurangi National Park 2799319 Treatment Block Details Treatment Blocks Size (ha) Gouland 30973.00 Cobb 84210.00 Kakapo 30171.00 Oparara 56995.00 Parapara 43489.00 Wangapeka 51293.00 Contractor Name OSPRI Treatment Dates Start Completion Cobb 22 Sep 2016 24 Nov 2016 Gouland 16 Feb 2017 28 Feb 2017 Kakapo 09 Sep 2016 24 Sep 2016 Oparara 09 Sep 2016 22 Sep 2016 Parapara 02 Dec 2016 24 Feb 2017 Wangapeka 14 Sep 2016 22 Oct 2016 Target Pest Details Target Treatment Blocks Control Method Name Pests Cobb Possum, Pesticide Aerial Pesticide - Aerial in Cobb-(2) Ship rat, Stoat Gouland Possum, Pesticide Aerial Pesticide - Aerial in Gouland- Ship rat, (1) Stoat Kakapo Possum, Pesticide Aerial Pesticide - Aerial in Kakapo- Ship rat, (3) Stoat Oparara Possum, Pesticide Aerial Pesticide - Aerial in Oparara- Ship rat, (4) Stoat Parapara Possum, Pesticide Aerial Pesticide - Aerial in Parapara- Ship rat, (5) Stoat Wangapeka Possum, Pesticide Aerial Pesticide - Aerial in Ship rat, Wangapeka-(6) Stoat Conservation Outcome(s) The primary objective of the control programme is to respond to a predicted beech mast induced rat population irruption resulting from heavy beech flowering and seeding in the 2015/2016 season. Meeting this objective will provide ecological benefit throughout the entire treatment area. Specific targets are set for whio, rock wren, kea and Powelliphanta landsnails. Result Target(s) Treatment Area/Block What we got Reduce rat Cobb 0% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce rat Cobb 1% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce rat Gouland 3.9% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce rat Kakapo 3.6% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce rat Oparara 23% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce rat Parapara 2.4% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce rat Wangapeka 0.4% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce stoat Gouland 0% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce stoat Kakapo 0% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce stoat Oparara 0% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce stoat Parapara 0% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Reduce stoat Wangapeka 12% tracking indices at all surveyed sites within the aerial treatment area to less than 5% Footprint Tunnel Index (FTI) Outcome Targets What we got Whio: (i) >80% adult female survival, and; (ii) 2016/17 – 10 nest attempts >50% nesting success, of 24 monitored pairs from 26 pairs across with the Wangapeka and Oparara Wangapeka/Oparara management units, in the period from the catchments of which 50% date of the initial 2014 aerial operations until nests successfully hatched at 30 May 2018. least one egg. Nest failures were due to: weka (3); abandoned (1); infertile eggs (1). 93% adult female survival during the breeding season (post 1080 - 14 of 15 monitored females survived – no 1080 residue detected in the female that died). Rock wren and kea: Increased survival and nil to date productivity as measured in the two breeding seasons after the operation. Powelliphanta landsnails: To have stable or Monitoring still to occur increasing colonies (>10 snails/100m2) of Powelliphanta landsnails 2. Introduction 2.1 TREATMENT AREA Non-target species Common Name Scientific Name Target benefit species Common Name Scientific Name Chalinolobus tuberculatus Long-tailed bat (South Island) Snail Rhytida oconnori Kea Nestor notabilis Rock Wren Xenicus gilviventris Blue duck, Whio, mountain Hymenolaimus duck, blue mountain duck malacorhynchos Great spotted kiwi, roa, roroa Apteryx haastii Falco novaeseelandiae Bush falcon, Karearea "bush" Western Weka Gallirallus australis australis Scarlet mistletoe Peraxilla colensoi Red mistletoe, pikirangi, Peraxilla tetrapetala pirirangi, pikiraki, pirita Yellow mistletoe Alepis flavida Powelliphanta gilliesi Large land snail jamesoni Powelliphanta gilliesi Large land snail kahurangica Powelliphanta superba Large land snail harveyi Powelliphanta superba Large land snail mouatae Powelliphanta superba Large land snail prouseorum Powelliphanta superba Large land snail superba Powelliphanta hochstetteri Large land snail anatokiensis Powelliphanta hochstetteri Large land snail anatokiensis red form Powelliphanta hochstetteri Large land snail anatokiensis yellow form Powelliphanta hochstetteri Large land snail hochstetteri brown based Powelliphanta lignaria Large land snail oconnori Powelliphanta hochstetteri Large land snail hochstetteri yellow based Powelliphanta "alpine" Large land snail subsp. "Owen" Snail Powelliphanta "Matiri" Large land snail Powelliphanta annectens Powelliphanta gilliesi Large land snail "Heaphy" South Island Kaka, bush Nestor meridionalis parrot, brown parrot, kawkaw meridionalis TREATMENT BLOCK DETAILS: Treatment block Gouland The coastal area vegetation is characterised by lush rain-fall and mild climate influenced forests with nikau (Rhopalostylis sapida), and northern rata (Metrosideros robusta) a dominant Vegetation type species feature. At increasing altitude, the forest becomes dominated by beech species (red and silver beech [Nothofagus fusca/ menziesii] at lower altitudes and then mountain beech [Nothofagus solandri var. cliffortioides] at higher altitudes). Southern rata (Metrosideros umbellata) becomes increasingly dominant as a secondary species along with Quintinia serrata and Weinmannia racemosa and then as the dominant canopy species towards the interior. At Gouland Downs a complex vegetation mosaic of mountain beech/pink pine forest, manuka shrubland, Dracophyllum spp shrubland, mountain flax shrubland, red tussock scrubland with bog pine Baumea rushland and low fertility pakihi and rockland vegetation. Above c 1300m sublalpine shrubland and tussockland dominate Bioclimatic zone coastal semi-coastal lowland sub-montane montane Climate characteristics: Rainfall 4000 mm Temperature: Average Summer 15.0 Average Winter 8.0 Snow level - m Altitude 10-1550 m The eastern part of the Heaphy Track bisects the operational area. This track attracts between 6000-7000 visitors per annum. The frequency of visitors is greatly reduced during the winter period with approximately 1% off the annual total of visitors walking the track in any one of the mid-winter months (May-August). Recreational deer-hunters generally limit their activities to the margins of the operational area at Shakespeare Flat and Kahurangi Point. The coastal route Community and from Anatori River to Kahurangi Point offers limited 4WD Iwi interests access to the operational area and is popular destination during the summer months Approximately 41% of the treatment block (13,098 ha) is within the Tasman Wilderness Area with consequent limited public access and use. The operational area encompasses the Heaphy track which generally was the major historical travel route for Golden Bay iwi to access central Westland (primarily for pounamu [greenstone] trading. The pattern of Maori occupation and settlement was overwhelmingly coastal despite resource and travel use of the interior. Middens and general occupation sites are Historic sites clustered around the larger river mouths and estuaries such as the Heaphy and Whanganui (outside the operational area) inlets. Treatment block Cobb The beech species (Nothofagus spp) dominate the forests with silver beech (Nothofagus menziesii) the principle species throughout. Red beech (Nothofagus fusca) is present at lower elevations and within higher fertility thermal bands higher up. With increasing elevation Halls totara (Podocarpus hallii) and occasional mountain cedar (Libocedrus bidwillii) Vegetation type are present as canopy constituents. Southern rata (Metrosideros umbellata) is uncommon but increases towards the east. On shallow or poorly drained soils above 1000 m a.s.l. mountain beech (Nothofagus solandri var. cliffortioides) often forms a mono-specific canopy and a mosaic with sub-alpine tussock-lands and herbfields. Bioclimatic zone sub-montane montane lowland Climate characteristics: Rainfall 3000 mm Temperature: Average Summer 15.0 Average Winter 8.0 Snow level - m Altitude 220-1800 m The Cobb Valley and Mt Arthur Tablelands and adjacent valleys are popular recreational destinations for both trampers and hunters. Fallow deer hunting
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