| FAO/FIIT Fishing Gear Type Fact-Sheet |
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Otter twin trawls [OTT] | updated : 10-mai-2001 |
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| ![](../assets/images/invidot.gif) |
ISSCFG Classification :
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> | Category : Trawl nets |
> | Type : Otter
twin trawls |
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Profile |
General Description: This special rigging system for this
particular gear was developed to increase the horizontal
fishing area of the trawl and comprises two
identical trawls ("twin") fixed
together. The horizontal opening is provided by a single
pair ofotter boards, which are
attached to the trawl close to the wings. Their inner wings
are attached to asledge towed
simultaneously with the otter boards from a
commoncrow foot. An other
option used on modern vessels in the northern shrimp fishery
is to tow the gear with three warps. |
Specific Handling Equipment:
Trawl winches installed on deck
control the trawling wires and store them when not in use.
In addition to the standard two-bobbins winch (or to two
single-bobbin winches), a third winch with one bobbin can be
necessary according to the rigging of the twin trawls (which
can be either two or three warps arriving to the trawler). |
Fishing Vessels using this gear:
Trawler
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Fishing Operations: In twin trawling one vessel tows two to
four trawls. In shrimp trawl and nephrops trawl fisheries it
is common to tow twin trawls over the stern. With a special
rigging there is also a possibility for towing three trawls
using to warps. In tropicalshrimp
trawling with outriggers twin trawls are towed
on each side (which makes a total of four trawls towed at
the same time). |
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Features |
Target Species: They are generally used for
catchingshrimp or bottom species. |
The Gear and its Environment:
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![](../assets/images/invidot.gif) | Deployment Area: All shrimp trawling areas. |
![](../assets/images/invidot.gif) | Impact on Aquatic Species: Unwanted bycatch of fish is one of
the main negative impacts. Use
ofbycatch reduction devices
(BRD) can mitigate the problem. |
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