Seine net

seine net

1. SEINE NET RIMSHA HAROON

2. INTRODUCTION: Locally known as katra . Rectangular in shape A very long net seine are designed to surround school fish this is an active gear Mesh size varies from 4 to 9 centimeter depending on the fish species to be caught two strong groups are used at upper and lower end both natural and artificial yarn are used twisted nylon or polyester yarn is used.

3. INTRODUCTION: A seine net is the most common type of net used on fish farms to harvest fish. It is a long net with ropes at each end and is pulled along the pond to collect the fish and then drawn into a circle to trap them. A seine net consists of one or more pieces of netting material mounted: at the top on a head rope equipped with floats; at the bottom on a foot rope equipped with sinkers (or leads). These ropes are normally extended beyond the netting to form pulling ropes.

4. NETTING MATERIAL:

5. ROPE: Rope can be made either of natural fiber (hemp, manila, sisal) or synthetic fiber (polyamide, polyethylene or polypropylene). Synthetic fibers are stronger and more resistant. Rope can be either twisted or braided. You will use rope for: the head rope: length of the seine plus 2 to 3 m; the foot rope: length of the seine plus 2 to 3 m; two vertical ropes: depth of the seine; pulling ropes: at each end of seine.

6. FLOATS:

7. SINKERS: Sinkers are usually made either from baked earth or lead. They are also available as thin lead sheets or in the form of olives of various individual weights. You can also use small stones, but they may break more easily. NETTING TWINE: Netting twine is needed to mount the netting on the various ropes. Use a synthetic twine slightly thicker than the twine of the netting. NET NEEDLE: A net needle is usually made of wood or plastic. You can buy it cheaply from a specialized store.

8. TYPES OF SEINE NET: ON THE BASIS OF STRUCTURE A seine is with or without bag, which set either from the shore or from a boat for surrounding certain area and is operated with two long ropes fixed to its ends.

9. TYPES OF SEINE NET: There are four general types of seine net, beach seine Lampara seine Danish seine Purse seine The 1 st two now use in artisanal fisheries the last two are generally too large to be operated successfully by artisanal fishermen

10. BEACH SEINE: A beach seine consist essentially of a bag with along rectangular and relatively narrow to the bag on either side of the mouth with cork line and lead line to keep it vertical in the water for fishing.

11. LAMPARA NET: The lampara net is relatively loose and open net bag with two wings. It is fished from small boats or along the beach to catch fish. Large lampara nets are also operated from large fishing vessels

12. DANISH SEINE: The danish seine is similar to a trawl , a big net bag with two wings, though fished in a different way It is used to catch fish living just over the bottom It is operated from fishing boat.

13. PURSE SEINE: The purse seine is basically a rectangular encircling net. with float line and with metal rings attached to its footrope and threaded onto the purse string It is set around the school of fish usually offshore and off bottom.

14. TARGET SPECIES:

15. REMEMBER THAT: seines are heavier to pull if the pond bottom is muddy short seines are easier to maneuver around obstacles such as tree stumps, rocks and aquatic weeds; short seines can easily be attached together, if necessary.

16. THANK YOU