Electric Fishing Seine

ELECTRIC FISHING SEINE

88′ x 42″, Mesh: 1/4”

50′ x 60″, Mesh 1/8″

50′ x 48″, Mesh: 1/8”

30′ x 60″, Mesh: 1/8”

30′ x 48″, Mesh: 1/8”

21′ x 48″, Mesh 1/8″

21′ x 60″, Mesh 1/8″

21′ x 48″, Mesh: 1/4”

15′ x 48″, Mesh: 1/4”

15′ x 48″, Mesh: 1/8”

Use:

ELECTRIC FISHING SEINE  used in river to catch small fishes during an electric fishing. It is equipped with a protective canvas on the lower part of the net in order to place a ballast composed of pebbles or other in order to keep the net on the river bed.

Electrofishing refers to all means of fishing for aquatic organisms, most often fish, using an electric current. The fish are attracted and then paralyzed by the electric current, so they rise to the surface.

This technique is forbidden for fishing (then considered as poaching).

It is legally authorized only for studies on fishery resources: counting, measuring, weighing and possibly marking/ringing. It is then a method for scientific purposes only and the fish, after having recovered their “spirits” and having been re-oxygenated, are released into the natural environment.

Technical recommendations for an ELECTRO-FISHING SEINE

Sampling should be started at low voltage and direct current, gradually increasing the voltage until the fish are caught.
If the fish are not captured successfully on DC, the operator can then adjust the voltage and pulse frequency (duration, amplitude and frequency).
The operator should seek to minimize damage to fish. A stream segment should be sampled methodically, moving the anode continuously in a herringbone pattern (if the stream configuration permits) through the water. Caution should be taken in areas of high fish concentrations, in the presence of dead wood, roots or overgrown banks, and in shallow water where anglers often want to count juvenile salmonids. Voltage gradients may be too high when the electrodes are in shallow water where the boundary layer (water surface and substrate) tends to intensify the electric field.
Do not operate in the same location for an extended period of time (e.g., under overhanging banks) and regularly inspect the nets collecting tetanized fish.
Fish should never come in contact with the anode (the potential harm zone for fish is about 50 cm around the anode).
Electrofishing operators should always be attentive to the condition of the fish and modify or cancel the sampling in case of problems such as abnormally long recovery times of the fish, presence of symptoms of stress or injuries, mortality (especially in the presence of threatened or protected species).
Handlers should remove stunned fish from the electric field as soon as possible.

    Portable electric wading seine.

ELECTRO FISHING SEINE

In a narrow stream with obstructed substrate (e.g., heterogeneous gravel substrate with many large rocks and boulders), low
(e.g., a heterogeneous gravel substrate with many large rocks and boulders), shallow depth and good visibility of the bottom, the
depth and good bottom visibility (low turbidity), portable wading is recommended.
is recommended. In addition, this non-lethal gear offers a certain efficiency for the capture of
individuals buried in the substrate, a behavior particularly developed in the sand darter.
sand darter.
Given the risk of electrocution associated with this gear, it is advisable to follow a formal training on this subject and to
formal training and a user’s guide [e.g., Guide to the Use of Sand Darters].
(2007)] for precautions to take when using electrofishing. (2007)] for precautions to take when using
when using it. The following method comes directly from Letendre and Leclerc (2006):
Use direct current. In addition, adjust the voltage of the device according to the
conductivity of the water at the station so that the current never exceeds 1.5 to 2 A.
Electrofishing sampling is done in all habitats favourable to the target species found in the
species found in the transect of each sampling station.
Define beforehand an area to be sampled of about 1 m2

The operator of the electro-fishing seine device must always remain in visual contact with
the net handlers.
Sample from downstream to upstream.
Activate the electric current for no more than 5 seconds. The operator must always hold the
the handle with one hand and operate the switch with the other hand.
When the current is activated, do not stay still in one place, but rather
quickly sweep the area to be sampled with the electrode.
The fishing should be done in such a way that the shocked specimens are within reach of the dip net handlers.
of the dip net handlers. This will limit sudden movements and falls.
Never collect specimens by hand.
Examine the condition of the captured specimens and adjust the power downwards if their condition is not
health is not satisfactory.

Note: An electrofishing team should consist of at least two people
but ideally three or four. In addition, two crews are recommended for streams
more than 7 m wide. The following is a breakdown of the roles of a
The following are the roles of a portable electric wading team:
1. One person operating the electric fishing device;
2. One or two dip net fishermen who closely follow the electrofishing operator
One or two anglers assigned to the landing nets who follow closely behind the operator of the electric fishing device;
3. A person who collects the captured specimens and stores them (bucket, rigid plastic container, etc.) and
A person who collects and stores the captured specimens (bucket, rigid plastic container, etc.) and who characterizes the habitat (inventory cards, photographs,
GPS). This third role can be assigned to one of the two fishers when the team is only three people.
the team is only three people.

A person who collects and stores the captured specimens (bucket, rigid plastic container, etc.) and who characterizes the habitat (inventory cards, photographs,
GPS). This third role can be assigned to one of the two fishers when the team is only three people.
This third role can be assigned to one of the two fishermen when the team is only three people.

Fabrication:

We have to sew the borders and the canvas on the sewing machine, since they are small nylon or polypropylene meshes Delta 1\8″, 1/4”, to catch small fish with lead braided rope to the bottom. We can make it to your specifications.

You don’t find your electric fishing seine, Call us and we will buil one with your own specifications.