Albert C/Vincent C

BRD


BRD stands for by-catch reduction device. Technologically, the BRD is an opening in the net that allows accidentally captured fish to escape. It was developed and tested by the NOAA(National Oceanic and Atmospheric Administration) to minimize accidental catches. There are different types of BRDs like the Gulf Fisheye, the Jones-Davis, the Fish eye BRDs, the extended funnel, the fisheye, and the Expanded Mesh. There are three types that are certified in the Gulf of Mexico and 7 types in the South-Atlantic. The most successful in both the South-Atlantic and the Gulf is the Fisheye BRD. The fisheye BRD and the Gulf Fisheye are the two most successful designs currently used in the Gulf of Mexico.

Types
Fish eye BRD

It is a cone shaped frame constructed from aluminum or steel rod which is put into the cod end to make the escape hatch. The Gulf Fisheye is very similar to this design. The only difference between the two is in where they placed in the cod end of the trawl.
Fisheye BRD
Fisheye BRD

Extended Funnel
Has an extension with a large mesh webbing in the center and a small mesh webbing on each end held open by a hoop. Small mesh webbing is put into the extension to lead the shrimp to the codend. One side of the funnel is extended vertically to form a lead panel and this creates an area of reduced water flow to allow the fish to escape through the large mesh. Two sizes: standard size and inshore size.
Extended Funnel
Extended Funnel

Jones-Davis BRD
Similar to the extended funnel except the fish escape openings are windows cut around the funnel rather than large mesh sections. Also a webbing cone fish deflector is stored behind the funnel.
Jones Davis BRD
Jones Davis BRD


Regulations
BRDs are required in the shrimp trawl nets in the federal waters of the Gulf of Mexico and the South Atlantic Ocean. BRDs are required in shrimp trawls since 1998 and since 2004 in the eastern half. BRDs are certified if it can reduce bycatch by 30% by weight. The fisheye BRD became the industrial standard because of its low cost and simple design.

Reference
http://www.seagrantfish.lsu.edu/management/TEDs&BRDs/brds.htm
http://www.seagrantfish.lsu.edu/management/TEDs&BRDs/brds_specs.htm
http://www.docstoc.com/docs/976928/Proposed-Changes-to-Regulations-for-Bycatch-Reduction-Devices-in-the-Gulf-of-Mexico-Shrimp-Fishery

BRD