FR2950225B1 - APPARATUS FOR CAPTURING MOLLUSCS AND CRUSTACEANS - Google Patents

APPARATUS FOR CAPTURING MOLLUSCS AND CRUSTACEANS Download PDF

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Publication number
FR2950225B1
FR2950225B1 FR1057470A FR1057470A FR2950225B1 FR 2950225 B1 FR2950225 B1 FR 2950225B1 FR 1057470 A FR1057470 A FR 1057470A FR 1057470 A FR1057470 A FR 1057470A FR 2950225 B1 FR2950225 B1 FR 2950225B1
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FR
France
Prior art keywords
seabed
dredgers
obstacles
traditional
sheet material
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.)
Active
Application number
FR1057470A
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French (fr)
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FR2950225A1 (en
Inventor
Paul Birnie
James Stewart Adam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OBAN SCALLOP GEAR Ltd
Original Assignee
OBAN SCALLOP GEAR Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OBAN SCALLOP GEAR Ltd filed Critical OBAN SCALLOP GEAR Ltd
Publication of FR2950225A1 publication Critical patent/FR2950225A1/en
Application granted granted Critical
Publication of FR2950225B1 publication Critical patent/FR2950225B1/en
Active legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K80/00—Harvesting oysters, mussels, sponges or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Revetment (AREA)
  • Mechanical Means For Catching Fish (AREA)

Abstract

L'invention fournit une drague (10) destinée à capturer des mollusques et crustacés comprenant un cadre (12), une pluralité de dents (20) adaptées pour creuser le fond marin, et un sac de récolte (14) attaché au cadre. Le sac de récolte (14) comprend un panneau supérieur (42) et un panneau inférieur (40, 140) raccordés l'un à l'autre sur les côtés latéraux et le bord arrière pour former une ouverture donnant sur le devant. Le panneau inférieur (40, 140) comprend un crible fait en un matériau en feuille souple dans lequel sont percés des orifices (48, 148), typiquement un groupe d'orifices rectangulaires. De façon typique, le matériau en feuille souple est sélectionné parmi le caoutchouc naturel, le caoutchouc artificiel et le polyuréthanne. La drague à pectinidés de la présente invention a moins d'impact sur le fond marin que les dragues à pectinidés traditionnelles, lesquelles utilisent pour le panneau inférieur des assemblages d'anneaux ou de maillons. Le panneau inférieur (40, 140) fait en un matériau en feuille souple présente au fond marin une surface moins rugueuse, si bien qu'il glisse mieux sur le fond marin, dérangeant de ce fait moins le fond de la mer. Il peut se déformer autour des obstacles qu'il rencontre sur le fond marin, au lieu de s'accrocher à ces obstacles, comme c'est le cas avec les dragues traditionnelles à assemblages d'anneaux, accrochage qui se traduit par un déplacement de ces obstacles et un dérangement du fond marin. Le poids réduit de la drague, comparé aux dragues traditionnelles à assemblages d'anneaux fait que le sac de récolte se soulève plus facilement par-dessus les éléments empêchant le passage, et entraîne moins de dérangement au fond de la mer.The invention provides a dredge (10) for catching shellfish comprising a frame (12), a plurality of teeth (20) adapted for digging the seabed, and a collecting bag (14) attached to the frame. The harvest bag (14) includes a top panel (42) and a bottom panel (40, 140) connected to each other on the side sides and the rear edge to form a front opening. The lower panel (40, 140) includes a screen made of a flexible sheet material with holes (48, 148), typically a group of rectangular holes, drilled into it. Typically, the flexible sheet material is selected from natural rubber, artificial rubber and polyurethane. The scallop dredger of the present invention has less impact on the seabed than traditional scallop dredgers, which use ring or link assemblies for the bottom panel. The lower panel (40, 140) made of a flexible sheet material has a less rough surface on the seabed so that it slides better on the seabed, thereby less disturbing the seabed. deform around the obstacles that it encounters on the seabed, instead of clinging to these obstacles, as is the case with traditional dredgers with ring assemblies, hooking which results in a displacement of these obstacles and disturbance of the seabed. The reduced weight of the dredge, compared to traditional dredgers with ring assemblies, makes the collection bag more easily lifted over the elements obstructing passage, and causes less disturbance to the seabed.

FR1057470A 2009-09-18 2010-09-17 APPARATUS FOR CAPTURING MOLLUSCS AND CRUSTACEANS Active FR2950225B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0916383.3A GB0916383D0 (en) 2009-09-18 2009-09-18 Apparatus for harvesting shellfish

Publications (2)

Publication Number Publication Date
FR2950225A1 FR2950225A1 (en) 2011-03-25
FR2950225B1 true FR2950225B1 (en) 2020-09-25

Family

ID=41277918

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1057470A Active FR2950225B1 (en) 2009-09-18 2010-09-17 APPARATUS FOR CAPTURING MOLLUSCS AND CRUSTACEANS

Country Status (2)

Country Link
FR (1) FR2950225B1 (en)
GB (2) GB0916383D0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102613148A (en) * 2012-04-03 2012-08-01 大连獐子岛渔业集团股份有限公司 Patinopecten yessoensis beam trawlnet with elastic teeth
CN103518681B (en) * 2013-10-07 2015-01-07 中国船舶重工集团公司第七一〇研究所 Net launching type aquatic life sampler
WO2017168110A1 (en) * 2016-04-01 2017-10-05 Deeside Marine Ltd Fishing drag for catching seabed dwelling marine animals
CN109430187B (en) * 2018-12-28 2024-03-29 大连海洋大学 Multifunctional ecological fishing net

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608217A (en) * 1969-02-28 1971-09-28 Charles J Voisin Sr Oyster dredging system
GB8919951D0 (en) * 1989-09-04 1989-10-18 Robinson Douglas G Scallop fishing equipment
IES20030791A2 (en) * 2002-10-24 2004-05-05 Sean Thomas Lambden A shellfish dredge

Also Published As

Publication number Publication date
GB2473713A (en) 2011-03-23
GB0916383D0 (en) 2009-10-28
FR2950225A1 (en) 2011-03-25
GB201015081D0 (en) 2010-10-27
GB2473713B (en) 2011-12-07

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