280px, Xcluder pest-exclusion fence around perimeter of Maungatautari A pest-exclusion fence is a barrier that is built to exclude certain types of

animal Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motilit ...

pest Pest or The Pest may refer to: Science and medicine * Pest (organism), an animal or plant deemed to be detrimental to humans or human concerns ** Weed, a plant considered undesirable * Infectious disease, an illness resulting from an infection ** ...

s from an

enclosure Enclosure or Inclosure is a term, used in English landownership, that refers to the appropriation of "waste" or " common land" enclosing it and by doing so depriving commoners of their rights of access and privilege. Agreements to enclose land ...

. This may be to protect plants in

horticulture Horticulture is the branch of agriculture that deals with the art, science, technology, and business of plant cultivation. It includes the cultivation of fruits, vegetables, nuts, seeds, herbs, sprouts, mushrooms, algae, flowers, seaweeds and no ...

, preserve

grassland A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush ( Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur natur ...

for

grazing In agriculture, grazing is a method of animal husbandry whereby domestic livestock are allowed outdoors to roam around and consume wild vegetations in order to convert the otherwise indigestible (by human gut) cellulose within grass and other ...

animals, separate species carrying diseases ( vector species) from livestock, prevent troublesome species entering roadways, or to protect

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

nature reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, or features of geological or ...

s. These fences are not necessarily traditional wire barriers, but may also include barriers of sound, or smell.

Design techniques

Animals can be excluded by a fence's height, depth under the ground and

mesh A mesh is a barrier made of connected strands of metal, fiber, or other flexible or ductile materials. A mesh is similar to a web or a net in that it has many attached or woven strands. Types * A plastic mesh may be extruded, oriented, e ...

size. It is also important to choose a construction material that cannot be climbed; furthermore, sometimes it is necessary to create a subsurface fencing element to prevent burrowing under the fence.Predator exclusion fence considerations
Fences are usually designed with the target pest species (the species to be excluded) in mind, and the fences are made to effectively exclude those species. This results in a wide variety of designs for pest exclusion fences (see examples below).

Examples

*The 1.9m-high fence at the

Orokonui Ecosanctuary thumb Orokonui Ecosanctuary, called Te Korowai o Mihiwaka in Māori, is an ecological island wildlife reserve developed by the Otago Natural History Trust in the Orokonui Valley between Waitati and Pūrākaunui, New Zealand, to the north of ...

in Waitati,

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 List of islands of New Zealand, smaller islands. It is the ...

is designed to keep out all introduced mammals such as

possums Possum may refer to: Animals * Phalangeriformes, or possums, any of a number of arboreal marsupial species native to Australia, New Guinea, and Sulawesi ** Common brushtail possum (''Trichosurus vulpecula''), a common possum in Australian urban ...

rat Rats are various medium-sized, long-tailed rodents. Species of rats are found throughout the order Rodentia, but stereotypical rats are found in the genus ''Rattus''. Other rat genera include ''Neotoma'' ( pack rats), ''Bandicota'' (bandicoot ...

stoat The stoat (''Mustela erminea''), also known as the Eurasian ermine, Beringian ermine and ermine, is a mustelid native to Eurasia and the northern portions of North America. Because of its wide circumpolar distribution, it is listed as Least C ...

ferret The ferret (''Mustela furo'') is a small, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), evidenced by their interfertility. Other mu ...

s and even

mice A mouse ( : mice) is a small rodent. Characteristically, mice are known to have a pointed snout, small rounded ears, a body-length scaly tail, and a high breeding rate. The best known mouse species is the common house mouse (''Mus musculus' ...

. It uses stainless steel

that continues down to form a skirt at ground level that prevents animals from burrowing under it. On the top is a curved steel hood that prevents climbers like cats and possums from climbing over the top. ''First Major Milestone Achieved for the Orokonui Ecosanctuary'' on orokonui.org.nz
*Agricultural exclusion fences in central-western

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

vary between 1.6m and 2m in height. The fences have a single top

barbed wire A close-up view of a barbed wire Roll of modern agricultural barbed wire Barbed wire, also known as barb wire, is a type of steel fencing wire constructed with sharp edges or points arranged at intervals along the strands. Its primary use is ...

and ring-lock or hinge-joint wire underneath and steel fence posts. The ring-lock or hinge joint wire has smaller holes at the bottom, gradually increasing in size to be marginally larger at the top. A section of this mesh lays flat against the ground at the bottom of the posts to form a skirt (or radial-apron) on the outside of the fence. *In Africa and Asia, crop-raiding elephants are excluded using a variety of techniques. These include electric fencing, fences of cacti, chilli-greased rope, and bee-hives or sounds of disturbed bees.

Use in Australia

Barrier fencing

Australia has utilised exclusion fencing since the 1860s. The most well known exclusion fences in Australia are the barrier fences. Barrier fences are long (usually linear) barriers erected for the purpose of excluding particular species from large portions of Australia. The most well known barrier fences are the Dingo Fence and the

Rabbit-proof fence The State Barrier Fence of Western Australia, formerly known as the Rabbit-Proof Fence, the State Vermin Fence, and the Emu Fence, is a pest-exclusion fence constructed between 1901 and 1907 to keep rabbits, and other agricultural pests from t ...

, but there are many others.

Agricultural exclusion fencing

In more recent years, pest-exclusion fences have been built around singular properties, or groups of properties. This practice is known as cluster fencing. Cluster fencing allows farmers to monitor and mitigate

predation Predation is a biological interaction In ecology, a biological interaction is the effect that a pair of organisms living together in a community have on each other. They can be either of the same species (intraspecific interactions), or o ...

pressure on

livestock Livestock are the domesticated animals raised in an agricultural setting to provide labor and produce diversified products for consumption such as meat, eggs, milk, fur, leather, and wool. The term is sometimes used to refer solely to anima ...

, and monitor Total Grazing Pressure (TGP) through accurate abundance data of native, pest, and domestic

herbivore A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage or marine algae, for the main component of its diet. As a result of their plant diet, herbivorous animals typically have mouthp ...

Conservation fencing

Australia uses pest-exclusion fencing to separate several high-value or threatened species from introduced predators. One such example is

Arid Recovery Roxby Downs is a town and locality in the Australian state of South Australia about north of the state capital of Adelaide. The town has a highly transient population of around 4,000 people. Roxby Downs has many leisure and community faciliti ...

in South Australia, where

feral cat A feral cat or a stray cat is an unowned domestic cat (''Felis catus'') that lives outdoors and avoids human contact: it does not allow itself to be handled or touched, and usually remains hidden from humans. Feral cats may breed over dozens ...

, red fox and

rabbit Rabbits, also known as bunnies or bunny rabbits, are small mammals in the family Leporidae (which also contains the hares) of the order Lagomorpha (which also contains the pikas). ''Oryctolagus cuniculus'' includes the European rabbit s ...

have been removed for the conservation of 5 threatened species.

Use in New Zealand

Prior to human settlement New Zealand had no land-based mammals apart from three bat species. The introduced mammal species, such as rabbits, deer, and possum, have since caused huge ecological changes to the biota of New Zealand. Pest-exclusion fences are increasingly used for conservation of indigenous species by excluding all mammals. Locations of predator-proof fences include: * Cape Brett *

Cape Farewell Cape Farewell ( kl, Nunap Isua; da, Kap Farvel) is a headland on the southern shore of Egger Island, Nunap Isua Archipelago, Greenland. As the southernmost point of the country, it is one of the important landmarks of Greenland. Geography Loc ...

*Deans Bush,

Christchurch Christchurch ( ; mi, Ōtautahi) is the largest city in the South Island of New Zealand and the seat of the Canterbury Region. Christchurch lies on the South Island's east coast, just north of Banks Peninsula on Pegasus Bay. The Avon Rive ...

Zealandia Zealandia (pronounced ), also known as ( Māori) or Tasmantis, is an almost entirely submerged mass of continental crust that subsided after breaking away from Gondwanaland 83–79 million years ago.Gurnis, M., Hall, C.E., and Lavier, L.L ...

, Wellington * Bushy Park * Maungatautari Restoration Project *

* Shakespear Regional Park *Styx Mill Reserve, Christchurch (under construction) *

Stewart Island Stewart Island ( mi, Rakiura, ' glowing skies', officially Stewart Island / Rakiura) is New Zealand's third-largest island, located south of the South Island, across the Foveaux Strait. It is a roughly triangular island with a total land ar ...

* Tawharanui Peninsula

Use in Japan

Conservation fencing

Deer-proof fencing was used in

Nagano Prefecture is a landlocked prefecture of Japan located in the Chūbu region of Honshū. Nagano Prefecture has a population of 2,052,493 () and has a geographic area of . Nagano Prefecture borders Niigata Prefecture to the north, Gunma Prefecture to the n ...

, Japan in a conservation effort to maintain plant diversity. The methods were effective for increasing species richness, but not as effective for conserving rare plants.

References

{{DEFAULTSORT:Pest-Exclusion Fence Fences Animal migration Land management

Design techniques

Examples

Use in Australia

Barrier fencing

Agricultural exclusion fencing

Conservation fencing

Use in New Zealand

Use in Japan

Conservation fencing

See also

References