Biodiversity Assessment Technical Report


Conservation measures for fish and aquatic macroinvertebrates



Yüklə 2,94 Mb.
səhifə21/42
tarix27.08.2017
ölçüsü2,94 Mb.
1   ...   17   18   19   20   21   22   23   24   ...   42

7.5 Conservation measures for fish and aquatic macroinvertebrates


A range of conservation measures are in place for the protection of streams and catchments in the Central Highlands. These include a conservation reserve system, incorporating specific conservation measures for the protection of aquatic habitats.
Following the Land Conservation Council’s (LCC) Rivers and Streams Special Investigation (LCC 1991) the Government declared the corridors of the Yarra, Goulburn (below Lake Eildon), Big, Aberfeldy and Thomson Rivers to be Heritage River Areas because of their significant natural, scenic, cultural heritage and recreational values. Timber harvesting is excluded from the Heritage River corridors within this planning area. In State forest, these corridors are included in the Special Protection Zone (SPZ).
In its recommendations following the Melbourne Area District 2 Review (LCC 1994) identified a ‘River Zone’ along other rivers and streams in the Central Highlands which contain significant natural, scenic or recreational value. These are the upper Goulburn, Murrindindi, Acheron, Latrobe and Toorongo Rivers and Snobs Creek. The corridor to be protected along these rivers and streams varies according to local circumstances but generally extends between 100 m and 300 m from each bank. These areas are also included in the SPZ.
Other protection for some aquatic species is afforded under Forest Management Zoning for other values (Special Protection Zones and Special Management Zones) or management prescriptions for other species or communities (e.g. Spotted Tree Frog, Rainforest) outlined in the Central Highlands Proposed Forest Management Plan.
Under the provisions of the FFG Act 1988 and the ESP Act 1992, and as part of Park and Forest Management Plans, conservation guidelines can be developed and implemented to protect individual species and their habitats from threatening processes. Where biological information is adequate, quite specific guidelines can be developed. This has been done for the Barred Galaxias. For this species, extended minimum streamside buffer widths are proposed in the Central Highlands Proposed Forest Management Plan. Additionally, trout exclusion barriers have been established below a number of populations to control predation.
A lack of detailed scientific information has to date precluded development of more species-specific conservation guidelines for other priority aquatic species. These species rely on the more general habitat protection measures of the Code of Forest Practices, and the Proposed Forest Management Plan for protection.
Recreational fish species are protected by a variety of fishing regulations, mainly bag and size limits and closed seasons during breeding. Fishing regulations also exist for Euastacus species in Victoria.
Management strategies to protect riparian and instream values are also key elements of the Code of Forest Practices for Timber Production and the Proposed Central Highlands Forest Management Plan. The Code contains a number of measures aimed at minimising impacts on water quality and, by extension, instream values.
Linear reserves in Special Protection Zones (SPZs), extending 200 metres from each bank of the watercourse have been established in the Proposed Central Highlands Forest Management Plan along most major streams. Within the SPZ, construction of new roads within linear reserves is to be avoided wherever possible.
In the General Management Zone (GMZ) the Code of Forest Practices for Timber Production requires:


  • the retention of a buffer strip at least 20m wide around permanent streams, permanent springs, swampy ground and bodies of standing water.

  • the retention of a filter strip at least 5m wide around temporary streams and drainage lines;

  • the application of slope limits;

  • standards for the design, construction, maintenance and rehabilitation of roads, tracks, bridges, log landings and log dumps; and

  • the suspension of activities during wet weather.

These mechanisms address a range of threatening process that potentially impact on aquatic fauna, as follows:



Threatening process

Management action

Alterations to the natural temperature of rivers and streams (FFG listed)

Minimum 20-m streamside reserves. Shading by riparian vegetation serves to minimise temperature variations that might otherwise result from additional exposure to the sun.

Alteration to the natural flow regimes of rivers and streams (FFG listed)

Stream and river channels will not be re-directed in State forest

Addressed by the Code and the Roading Prescriptions for Timber Production in the Central Highlands



Prevention of passage of aquatic biota as a result of the presence of in-stream structures (FFG listed)

Addressed by the Code and the Roading Prescriptions for Timber Production in the Central Highlands

Increase in sediment input into rivers and streams due to human activities (FFG listed)

Minimum 20-m streamside reserves. Addressed by the Code, Forest Management Area (FMA) timber harvesting prescriptions and the Roading Prescriptions for Timber Production in the Central Highlands

Input of toxic substances into Victorian rivers and streams

(FFG listed)



Addressed by the Code requirements for safe handling of fuel and lubricants which restricts the location and conduct of refuelling operations

Use of Phytophthora-infected gravel in the construction of roads, bridges and reservoirs (FFG listed)

Quarantine infected areas

See Section 8.1



Degradation of riparian vegetation

Minimum 20-m streamside reserves. Control of weeds (particularly blackberries) at road or track crossings.


Table 7.12: Specific Conservation guidelines and activities (apart from the measures outlined above) for priority aquatic species. Fishing regulations from CNR (1995a).

Species Name

Conservation guidelines or activity

Fish




Geotria australis

None

Prototroctes maraena

FFG collecting restrictions;

Fishing regulations: no netting allowed



Galaxias cleaveri

FFG collecting restrictions

Galaxias fuscus

FFG collecting restrictions;

Minimum streamside buffer widths extended to 30m and filter strip width to 10m for highly permeable soils;

Minimum streamside buffer widths extended to 40m or 50m for soils with low permeability (extension depends on slope);

progressive closure and rehabilitation of roads not required for forest management;

Minimising stream crossings over permanent and temporary streams;

Construction of weirs to exclude trout.



Galaxias olidus

None

Galaxias rostratus

None

Galaxias truttaceus

None

Galaxiella pusilla

FFG collecting restrictions

Maccullochella peelii peelii

FFG collecting restrictions;

Fishing regulations: 2 per day bag limit, 50 cm size limit, closed season 1 September-30 November, no netting allowed



Macquaria ambigua

Fishing regulations: Closed season last Sunday in August-last Friday in November, no netting allowed

Macquaria australasica

FFG collecting restrictions;

Fishing regulations: 10 per day bag limit, 25 cm size limit, closed season 1 October-18 December (Lake Dartmouth), no netting allowed



Gadopsis marmoratus

None

Philypnodon sp. nov.

None

Decapod Crustacea




Engaeus phyllocerus

FFG collecting restrictions

Engaeus sternalis

FFG collecting restrictions

Euastacus armatus

Fishing regulations: 10 per day bag limit, 9 cm size limit, restrictions on catching females and newly moulted animals.

Other invertebrates




Hemiphlebia mirabilis

FFG collecting restrictions

Archeophylax canarus

FFG collecting restrictions

Plectrotarsus gravenhorsti

None

Riekoperla darlingtoni

FFG collecting restrictions

Tanjistomella verna

None

Thaumatoperla robusta

None

Austrogammarus australis

FFG collecting restrictions

Austrogammarus haasei

FFG collecting restrictions

Canthocampus dedeckkeri

None

Canthocampus mammillifurca

None

Canthocampus sublaevis

None





Yüklə 2,94 Mb.

Dostları ilə paylaş:
1   ...   17   18   19   20   21   22   23   24   ...   42




Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©azkurs.org 2020
rəhbərliyinə müraciət

    Ana səhifə