GB2448376A - A predator defence system to protect fish stock - Google Patents
A predator defence system to protect fish stock Download PDFInfo
- Publication number
- GB2448376A GB2448376A GB0710260A GB0710260A GB2448376A GB 2448376 A GB2448376 A GB 2448376A GB 0710260 A GB0710260 A GB 0710260A GB 0710260 A GB0710260 A GB 0710260A GB 2448376 A GB2448376 A GB 2448376A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sonic
- otter
- waterproof
- visible light
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 241000251468 Actinopterygii Species 0.000 title claims abstract description 14
- 244000062645 predators Species 0.000 title abstract 2
- 241001233242 Lontra Species 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 241000499489 Castor canadensis Species 0.000 claims abstract description 7
- 235000011779 Menyanthes trifoliata Nutrition 0.000 claims abstract description 7
- 241000772415 Neovison vison Species 0.000 claims abstract description 7
- 230000009429 distress Effects 0.000 claims description 7
- 241001465754 Metazoa Species 0.000 abstract 2
- 241000428198 Lutrinae Species 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000272517 Anseriformes Species 0.000 description 1
- 241000276420 Lophius piscatorius Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/06—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like
- A01M29/10—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like using light sources, e.g. lasers or flashing lights
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Birds (AREA)
- Engineering & Computer Science (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A predator defence system to deter an animal such as an otter, mink or beaver, from fish stock in the form of waterproof sonic and/or visible light transmitter E, the signal(s) produces a disturbance that will deter the animal from hunting and catching the fish stock. The waterproof sonic or light transmitter made be located under or floating (Fig 2) on the water A. Preferably the visible light and/or sonic signal(s) are automatically activated by a passive infrared detector that may be positioned above or below water that turns on the signal(s) when the body heat of an otter, mink or beaver is detected above or in the water. A grid of waterproof sonic or light transmitters can be placed under and/or floating on the water to protect a larger expanse of water.
Description
OTTER PREDATION DEFENCE SYSTEM
This invention relates to an otter predation defence system.
The use of fencing to protect fish stocks is considered to be the only viable long-term method of protection against otter predation. Although practical, fencing does have many disadvantages, examples being, maintenance, unsightliness, barring access to water of other wildlife, unsuitability for certain borders such as those comprising hedges, bushes, small trees, high banks, etc. Also, fencing is only suitable for protecting ponds and lakes but is not suitable for protecting rivers.
The otter predation defence system herein described overcomes the disadvantages of fencing by using a defence system installed underwater or floating on the water where the fish to be protected are locatecL For example, as otters catch the vast majonty of fish underwater using the senses of sight and sound, the otter defence system is designed to make swimming underwater by the otter very stressful, thus deterring the otter from hunting and catching fish underwater.
Distress to the otter is caused by a combination of sonic signals and/or visible light present in the water of suflicient characteristics to deter the otter from going underwater to hunt and catch fish.
For example, sonic signal characteristics such as frequency, volume, modulation, pitch, repetition rate, etc. and visible light characteristics such as colour, colour combinations, intensity, frequency, modulation, repetition rate (strobe), etc. suitably combined to cause distress to the otter.
The otter predation defence system is designed such that all elements can be installed underground and/or underwater and/or floating on water where necessary to reduce water access problems for anglers or other water users. In addition, the characteristics of the sonic signal are such as not to cause distress to fish, waterfowl and aquatic life in general. However, when visible light is used some distress to some species of aquatic wildlife may occur.
To optimise energy consumption and minimise possible disturbance to aquatic wildlife, Passive Infrared (PIR) detectors suitably located either above ground and/or underwater can be used to automatically switch on the otter distress signals when body heat from an otter is detected.
A detailed description of the otter predation defence system is provided using reference to the drawings in Figure 1 of page 1/2 and Figure 2 of page 212.
The drawing in Figure 1 of page 1/2 shows an underwater installation of the otter predation defence system. From this drawing the otter predation defence system comprises the required number of waterproof sonic and/or visible light transmitters E needed for the area and type of water A to be protected, a power supply unit D to supply electrical power to the waterproof sonic and/or visible light transmitters E and suitable underground and waterproof cables C to connect the power supply unit D to the waterproof sonic and/or visible light transmitters B. The waterproof sonic and/or visible light transmitters E are placed a sufficient distance under the water A from the bank edge B such that an otter entering the water A will feel increased discomfort as it swims under the water A towards the waterproof sonic and/or visible light transmitters E. Also, the waterproof sonic and/or visible light transmitters E are spaced an optimum distance apart along the bank edge B to provide continuous water edge protection.
The drawing in Figure 2 of page 2/2 shows a floating installation of the otter predation defence system comprising the same elements as previously described in the drawing in Figure 1 of page 1/2, with the exception that the waterproof sonic and/or visible light transmitters B are floating on the water A and are connected to the power supply unit D by suitable underground and waterproof cables C secured to floating beams F. To optimise energy consumption and minimise possible disturbance to aquatic wildlife, a PIR detector (not shown) suitably located above ground and/or underwater can be used to automatically switch on the otter distress signals when body heat from an otter is detected. For underwater applications the PIR detector (not shown) is an integral part of the waterproof sonic and/or visible light transmitters E. For above ground applications the PIR detector (not shown) is electrically connected by suitable means to the waterproof sonic and/or visible light transmitters B. For increased protection a grid (not shown) of waterproof sonic and/or visible light transmitters Bean be placed under and/or floating on the water A covering the whole area of water A tobe protected. Similarly, a selected area of the water A can be protected to provide sanctuaiy to the fish when being chased by otters. A combination of the bank edge B and grid method (not shown) can be used to protect stretches of a river.
The otter predation defence system is also suitable to protect against mink predation and beaver predation.
Claims (7)
- I. The otter predation defence system comprising a number of waterproof sonic and/or visible light transmitters, a power supply unit and suitable interconnecting cables protect fish stocks against otter predation.
- 2. The otter predation defence system comprising a number of waterproof sonic and/or visible light transmitters, a power supply unit and suitable interconnecting cables protect fish stocks against mink predation.
- 3. The otter predation defence system comprising a number of waterproof sonic and/or visible light transmitters, a power supply unit and suitable interconnecting cables protect fish stocks against beaver predation.
- 4. A waterproof sonic and/or visible light transmitter, as claimed in Claim 1 and Claim 2 and Claim 3, when located in water, transmits sonic and/or visible light signals into the surrounding water in which the waterproof sonic transmitter has been located.
- 5. A suitable number of waterproof sonic and/or visible light transmitters, as claimed in Claim 1 and Claim 2 and Claim 3 and Claim 4, produce sonic and/or visible light signRls in the water of sufficient characteristics to deter an otter, mink or beaver from placing its head underwater to hunt and catch fish.
- 6. A Passive Infrared (PIR) detector suitably located above water can be used to automatically switch on otter distress signals from the waterproof sonic and/or visible light transmitters, as claimed in Claim I and Claim 2 and Claim 3 and Claim 4 and Claim 5, when body heat from an otter, mink or beaver is detected above water.
- 7. A Passive Infrared (PIR) detector suitably located underwater can be used to automatically switch on otter disliess signals from the waterproof sonic and/or visible light transmitters, as claimed in Claim 1 and Claim 2 and Claim 3 and Claim 4 and Claim 5, when body heat from an otter, mink or beaver is detected in water.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0707204.4A GB0707204D0 (en) | 2007-04-14 | 2007-04-14 | Otter predation defence system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0710260D0 GB0710260D0 (en) | 2007-07-11 |
| GB2448376A true GB2448376A (en) | 2008-10-15 |
Family
ID=38116722
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0707204.4A Ceased GB0707204D0 (en) | 2007-04-14 | 2007-04-14 | Otter predation defence system |
| GB0710260A Withdrawn GB2448376A (en) | 2007-04-14 | 2007-05-30 | A predator defence system to protect fish stock |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0707204.4A Ceased GB0707204D0 (en) | 2007-04-14 | 2007-04-14 | Otter predation defence system |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB0707204D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2469603A (en) * | 2010-08-16 | 2010-10-20 | Limited Fish Guidance Systems | Deterring underwater animals from an underwater region |
| GB2472035A (en) * | 2009-07-22 | 2011-01-26 | Questor Group Ltd C | Open ocean fish farm |
| GB2472037A (en) * | 2009-07-22 | 2011-01-26 | Questor Group Ltd C | Open ocean fish farm |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990001758A1 (en) * | 1988-08-11 | 1990-02-22 | Robert Jones | Security system |
| GB2254464A (en) * | 1991-04-06 | 1992-10-07 | William Henry Saint | Audible alarms |
| WO1994000007A1 (en) * | 1992-06-27 | 1994-01-06 | Ferranti-Thomson Sonar Systems U.K. Limited | Fish farm cage security system |
| WO1995000016A1 (en) * | 1993-06-22 | 1995-01-05 | Airmar Technology Corporation | Acoustic deterrent system and method |
| DE19858204A1 (en) * | 1998-12-17 | 2000-06-21 | Walter Von Ascheraden | Warning buoy for frightening marine wildlife from area of oil-spill, comprises system for emitting range of warning sounds and/or flashing light signals |
| GB2369025A (en) * | 2000-11-18 | 2002-05-22 | Ace Hopkins John Mansel | A system for scaring predators |
-
2007
- 2007-04-14 GB GBGB0707204.4A patent/GB0707204D0/en not_active Ceased
- 2007-05-30 GB GB0710260A patent/GB2448376A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990001758A1 (en) * | 1988-08-11 | 1990-02-22 | Robert Jones | Security system |
| GB2254464A (en) * | 1991-04-06 | 1992-10-07 | William Henry Saint | Audible alarms |
| WO1994000007A1 (en) * | 1992-06-27 | 1994-01-06 | Ferranti-Thomson Sonar Systems U.K. Limited | Fish farm cage security system |
| WO1995000016A1 (en) * | 1993-06-22 | 1995-01-05 | Airmar Technology Corporation | Acoustic deterrent system and method |
| DE19858204A1 (en) * | 1998-12-17 | 2000-06-21 | Walter Von Ascheraden | Warning buoy for frightening marine wildlife from area of oil-spill, comprises system for emitting range of warning sounds and/or flashing light signals |
| GB2369025A (en) * | 2000-11-18 | 2002-05-22 | Ace Hopkins John Mansel | A system for scaring predators |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2472035A (en) * | 2009-07-22 | 2011-01-26 | Questor Group Ltd C | Open ocean fish farm |
| GB2472037A (en) * | 2009-07-22 | 2011-01-26 | Questor Group Ltd C | Open ocean fish farm |
| GB2469603A (en) * | 2010-08-16 | 2010-10-20 | Limited Fish Guidance Systems | Deterring underwater animals from an underwater region |
| GB2469603B (en) * | 2010-08-16 | 2011-03-30 | Fish Guidance Systems Limited | Deterring underwater animals from an underwater region |
| WO2012022957A1 (en) * | 2010-08-16 | 2012-02-23 | Fish Guidance Systems Limited | System for deterring underwater animals from an underwater region |
| CN103069079A (en) * | 2010-08-16 | 2013-04-24 | 费希指导系统有限公司 | System for deterring underwater animals from an underwater region |
| RU2571342C2 (en) * | 2010-08-16 | 2015-12-20 | Фиш Гайданс Системз Лимитед | System for deterrence of underwater animals from underwater area |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0707204D0 (en) | 2007-05-23 |
| GB0710260D0 (en) | 2007-07-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |