Catch information from recreational fishers is essential for the ongoing development and enhancement of the DPI FADs program such as determining FAD location. Recreational fishers are encouraged to participate in tagging and detailed Logbook Monitoring to assist DPI in collecting catch data for the FADs program. Results so far have shown that approximately 96% of FAD captures are mahi-mahi (Coryphaena hippurus). The remaining 4% consisted of a variety of pelagic fish species including striped marlin (Tetrapturus audax) and wahoo (Acanthocybium solandri).

Logbooks are quick and easy to complete with all participating fishers receiving a FADs Program T-shirt. If you want to become involved, please contact the FADs program coordinator on (02) 9527 8411 or email fisheries.FADs@dpi.nsw.gov.au.

Mahi-mahi tagging research

The DPI FADs program has resulted in mahi mahi becoming one of the most popular and reliable pelagic sportfish targeted by recreational anglers off the coast of NSW. As part of the DPI Gamefish Tagging Program, a small pink coloured tag for the tagging of mahi-mahi has been developed.

Tips for tagging mahi-mahi less than 6kg

Never try to tag a small mahi-mahi while the fish is in the water or dangling from a hook. Placing the fish on a piece of wet foam or sponge helps to subdue the fish considerably, reduces stress and increases post tagging survival rates. Before the fish is brought into the boat, have a tag in the applicator, a wet towel and a measuring device ready. Follow these simple steps:

• Place the wet towel over the fish's eyes while it is still hanging from the hook.
• Lay the fish on a wet, smooth, flat surface (e.g. ideally wet sponge or foam, or a wet towel will suffice) with the measuring device under or beside the fish.
• If the hook is easily accessible, it should be removed from the fish. If the fish is hooked deeply, the leader should be cut as short as possible and the hook left in the fish.
• Measure and record the fork length of the fish (the distance from the tip of the snout to the fork in the tail).
• Insert the tag at about one third of the length of the fish behind the head (the shoulder area) at a 45° angle toward the fish's head so as to have the tag angling backwards toward its tail.
• Insert the tag deep enough so that the barb passes between the spines that radiate off the backbone. Care should be taken to insert the tag into the back muscle, below the dorsal fin, well above the spine.
• Return the fish to the water as soon as possible.
• The last and most important step is to record capture data on the post paid tag-return card and send it back to DPI.

Tips for tagging mahi-mahi larger than 6 kilograms

Large mahi-mahi (fish over 6 kilograms and roughly 90 centimetres fork length) should be tagged in the water. When tagging a mahi-mahi in the water, the vessel should continue its forward motion as the fish is brought along side, helping to subdue the fish by keeping it swimming while beside the boat. Tagging should not be attempted until the fish has settled down and presents a clear, stable view of its side. Follow these simple steps:

• Position yourself between the person holding the leader and the boat's stern.
• Insert the tag at a 45° angle toward the fish's head so as to have the tag angling backwards toward its tail.
• Insert the tag and insure that it is firmly anchored.
• Make sure to place the tag approximately one-third along the fish's length behind the head in the back muscle, directly below the dorsal fin (well above the spine).
• Before releasing the fish, get a good estimate of the fork length of the fish and/or weight. The hook should be removed if possible, otherwise, the leader should be cut as close to the hook as possible.
• The last and most important step is to record capture data on the postage paid tag-return card and send it back to NSW DPI.

Please note

It is very important that accurate data on each fish is recorded on the tag-return card to maximize the value of any recaptured fish. Accurate GPS waypoints (WGS84) or the FAD you are fishing at is critical for determining position of the first release and recapture. Please print clearly on the card.

How to get your small pelagic tags

Small pelagic tags and applicators can be issued to clubs or individual anglers by contacting the FADs program coordinator on (02) 9527 8411. Alternatively email FADs@dpi.nsw.gov.au stating your name, postal address, contact phone number, number of tags you require and the location you intend to fish.