NO20171568A1

NO20171568A1 - Flat hanger, Horizontal skeleton collector

Info

Publication number: NO20171568A1
Application number: NO20171568A
Authority: NO
Inventors: Jan Østvik
Original assignee: Oestvik Jan
Priority date: 2017-01-03
Filing date: 2017-09-27
Publication date: 2018-07-04

Abstract

En horisontal Samler og vekst flate for skjell yngel, også Blåskjell (Mytilus Edulis) med hovedvekt på at produksjonen til enhver tid skal foregår nærmest mulig overflaten for å nyttigjøre seg brakkvanslaget og næringstilgangen i overflaten for optimal skjell vekst, samt at man unngår uønsket påslag av makroalger som ikke har særlig utbredelse på de dybder det her er tale om. I tilegg elimineres langt på vei problemet med beitende Ærfugler. Vidre er det i krav 2 beskrevet mekanisert utstyr for innhøsting av skjell dyrket på den ovenfornevnte skjell samler i følge krav 1.A horizontal collector and growth surface for shellfish fry, also Blue mussels (Mytilus Edulis) with the main emphasis on producing production at the closest possible surface to utilize the brackish impact and nutritional supply in the surface for optimal shell growth, and avoiding unwanted application of macroalgae that are not widely used at the depths in question. In addition, the problem of grazing pea birds is far from eliminated. Further, mechanized equipment for harvesting shells grown on the above-mentioned shells collectors according to claim 1 is further described in claim 2.

Description

Innledning: Introduction:

Tradisjonelt foregår dyrking av blåskjell i Norge og endel andre land etter bøyestrekk metoden med Yngel Samlere som er plasert vertikalt i vannmassene hengende fra en horisontale bæreliner, vekst området strekker seg da typisk fra Ca.1 -5 Mtr. vanndybde. Traditionally, cultivation of mussels in Norway and a number of other countries takes place according to the buoy stretching method with fry collectors which are placed vertically in the water masses hanging from a horizontal support line, the growth area then typically extends from approx.1 -5 Mtr. water depth.

Dette har vist seg effektivt i relativt lukkede fjordområder der det er godt tilsig av ferskvann som sikkrer ett tykt brakkvanslag som holder Saliniteten i sjøen nede, noe som er gunstig for veksten av skjell, og samtidig gjør miljøet ugunstig for ikke ønskede organismer som Sjøpung, Tare, Kalkmark, Sjøstjerner og andre. This has proven effective in relatively closed fjord areas where there is a good influx of fresh water that ensures a thick layer of brackish water that keeps the salinity in the sea down, which is favorable for the growth of shells, and at the same time makes the environment unfavorable for unwanted organisms such as seaweed, kelp , Kalkmark, Sea stars and others.

I mere kystnære strøk med tynnere brakkvanslag og høyere salinitet, kan imidlertid blåskjelldyrking etter bøyestrekk metoden med vertikale samlere være en utfordring, nettop på grunn av den høyere saliniteten som ofte resulterer i at det blir yngelpåslag kun i øvre del av den vertikale samleren, mens på den delen som er på større dybde fortrenges skjellyngelen ofte av sjøpølse, tare og andre uønskede organismer. Det er også utviklet horisontale samlere, men disse konstruksjonene tar heller ikke tilstrekkelig hensyn til optimal dyrkings dybde for skjell, samt at de eksisterende løsningene er unødvendig kompliserte når det gjelder oppankring og fortøying. However, in more coastal areas with thinner brackish layers and higher salinity, mussel cultivation after the buoy stretching method with vertical collectors can be a challenge, precisely because of the higher salinity which often results in spawning only in the upper part of the vertical collector, while on the part that is at a greater depth, the shellfish fry are often displaced by sea sausage, kelp and other unwanted organisms. Horizontal collectors have also been developed, but these constructions also do not take sufficient account of the optimal cultivation depth for shells, and that the existing solutions are unnecessarily complicated when it comes to anchoring and mooring.

Beskrivelse: Description:

Oppfinnelsen er en horisontal samler for skjellyngel som karakteriseres ved at den er utstyrt med flytebøyer og kompenserings lodd på en slik måte at samleren holder seg stabilt på høyest mulig nivå i vannmassene uavhengig av tidevannsforskjeller og andre yttre påvirkninger. The invention is a horizontal collector for shellfish fry which is characterized by the fact that it is equipped with buoys and compensating weights in such a way that the collector remains stable at the highest possible level in the water masses regardless of tidal differences and other external influences.

Ønsket produksjons dybde er i området 0-1 Mtr noe som sikrer optimal næringstilgang og vekstforhold for skjell også i kystnære strøk. Med den beskrevene metoden regner vi med å halvere produksjonstiden for skjell samenliknet med konvensjonelle hengekultur anlegg, dette på grunn av den høyere næringstilgangen i overflaten, samt at ønskede organismer som kan fortrenge skjellene fra vekstmediumet har liten eller ingen utbredelse på den beskrevene vann dybde. En regner med stor effektiviserings gevinst med bruk av det omsøkte utstyret i forhold til konvensjonelle hengekultur anlegg, både når det gjelder tidsforbruk forbruk ved utsett av samlere, samt ikke minst høstekapasiteten ved bruk av det i krav No.2 spesifiserte utstyr som vil være klart større enn ved utstyr som hitil er kjent. Problematikken med beitende Ærfugler ansees også å være overkommet da skjellene vil vokse kun på undersiden av samlerne hvor de ikke er tilgjengelig for Ærfuglene selv om produksjonen foregår så og si helt i vannflaten. The desired production depth is in the range of 0-1 Mtr, which ensures optimal nutrient access and growth conditions for shells also in coastal areas. With the described method, we expect to halve the production time for shells compared to conventional hanging culture facilities, this due to the higher nutrient supply in the surface, as well as the fact that desired organisms that can displace the shells from the growth medium have little or no distribution at the described water depth. A large efficiency gain is expected with the use of the requested equipment in relation to conventional hanging culture facilities, both in terms of time consumption and consumption in case of postponing collectors, as well as, not least, the harvesting capacity when using the equipment specified in requirement No.2, which will be clearly greater than with equipment known to date. The problem with grazing Eagles is also considered to have been overcome as the shells will only grow on the underside of the collectors where they are not accessible to the Eagles even though the production takes place, so to speak, entirely on the water surface.

Claims

Patent claims

1. Horizontal collector and growth surface for mussel fry, also mussels (Mytilus Edulis), according to Fig.1 and Fig.2 detail which, in contrast to existing horizontal collectors which are designed to be stable deeper down in the water masses, is characterized by a single mooring system consisting of floating buoys and compensating weights to ensure that the collector stays as high as possible in the water bodies regardless of tidal differences and other external influences. This will provide optimal growth conditions for the shells. The extended net or surface has no more precisely defined size. The growth surface (A) is held stretched out in the transverse direction with Spredestag (E) as follows from requirement 2. In the longitudinal direction, the collector is held in place between the anchoring points (D) which can either be attached directly to land or with an anchor on the bottom. Furthermore, a balancing weight (E) is placed between the growth surface (A) and the floating buoy (F) which will ensure that the collector remains fully extended at any time and thus at all times at the optimum water depth for landing of shellfish fry and their continued growth as nearly as possible the surface where nutrient access is best. The floating elements (B) ensure buoyancy as needed on each side of the growth surface (A). In order for the Growth Surface (A) to have sufficient strength, it can be reinforced with rope (A1) on all four sides. On the ropes (A1) are fitted loops of rope (A-2) which via the pigtails (C-1) on the spreader rods (C) are easily connected via the ropes (B-1) to the floating elements (B) for necessary buoyancy.

2. For the collection of shells that have been collected or grown on shell collectors as described in claim 1, two drums are used according to Fig.3 which are installed on board a suitable vessel (1). The drums rotate around their own axis, and have a width as equal to or greater than the shortest side of the growth surface (A) described in claim 1. When collecting shells, the shortest side of the shells is attached to the collector drum (2). when the drum rotates around its own axis, the collector will slowly be drawn in. This causes the shell collector to be pulled over the drum (3) which, in the vessel's direction of travel, is positioned in front of the drum (2). Drum (3) has the opposite direction of rotation compared to drum (2) and is equipped with a scraper which, by rotating around its own axis, will effectively scrape the shells from the collector. The shells will fall into the collection funnel under the drum (3) and be carried on by conveyor belt (4) to suitable collection in tubs or large sacks for further transport to the reception facility.