Coho Fry Fin Clip Held at Hoy Creek Hatchery

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Anne points to the adipose fin.

Fisheries and Oceans Canada supported Hoy Creek Hatchery in Coquitlam for our annual fin clip on June 23. The Coho salmon are approximately 3 months old.

The adipose fin is removed and is a soft, fleshy fin found on the top of the salmon, on the back behind the dorsal fin and just forward of the caudal fin. This marking of our coho supports:

Stock assessment for when salmon return to spawn, the clipped fins allow hatcheries and stream keepers to monitor their return. Selective fisheries - in certain regions and sub-areas, a marked fishery is permitted for the retention of the coho. The procedure also allows for a manual fish count, whereas previously only weight sample counts took place.

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HSWS president, Kyle counts the fish he’s marked with a clicker, as Anne carefully clips the adipose fin.

The operation was overseen by DFO fisheries community advisor, Isaac Nelson and Hoy Creek Hatchery manager, Tyler Storgaard. Assisting Isaac from the DFO was Eric Kukulowicz. Volunteers of the Hoy/Scott Watershed Society assisted. Approximately 8,200 fish were marked.

First, the fish are anesthetized in small batches. Once in the solution, they become sleepy within minutes. The volunteers stand ready around a table equipped with a trough with flowing water and beds of water for the fish to lay in. Volunteers work quickly and very carefully to clip fins with disinfected surgical scissors before they wake up, which is within about a minute. Fish are put into the outside trough and end up in the bucket at the end of the table. They are returned to the hatchery to recover.

The fish will soon be transferred from the hatchery Capilano trough room and will live in the rearing pond until Salmon Leave Home in May 2024. Fish from this brood could then return in about 1.5–2.5 years.

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HSWS director, Matt distributes anesthetized fish into trays, as Thomas and Rodney clip.

Thanks to all our Society members who helped out this year, as well as to the public to stopped in to observe and ask questions!

See more photos in our Facebook photo album.

10,000 Coho Marked at Hoy Creek Hatchery

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HSWS student volunteer, Ririka works alongside DFO members on her first fin-clip.

On June 10 our annual adipose fin clipping session took place at Hoy Creek Hatchery. Over 10,000 Coho fry, approximately 6 months old had their adipose fin removed to identify them as 'hatchery fish.'

Led by hatchery manager Tyler Storgaard, the procedure is overseen by the Department of Fisheries and Oceans Canada who had three members on-site assisting. The adipose fin, located at the top back of the salmon is removed after the fish have been sedated. It's a fast process and many careful hands make light work.

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The clipping station set up outside the Hoy Creek Hatchery on June 10, 2021.

The markings also help the society identify the hatchery fish during returns in the fall.

Thanks to Hoy-Scott Watershed volunteers who put in the time to assist with this exercise.

The fish will be moved to the outdoor rearing pond in the coming days and will remain there until May of 2022.

• View more photos in our Facebook album.

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Sedation area

Fourth annual fin clipping exercise at Hoy Creek Hatchery

Volunteers carefully snip the adipose fin off a sedated coho fry

On June 15, 2017 we performed our fourth fin clipping exercise at Hoy Creek Hatchery for our coho salmon fry.

The adipose fin is removed after the fish are sedated. It's a fast process and many careful hands make light work.

The entire procedure is overseen by the Department of Fisheries and Oceans. All fry recovered expect one of approximately 5500 fishmarked.  The markings help the society identify hatchery fish during returns in the fall.

Thanks to Hoy-Scott Watershed members who provided the photos seen here.

Many hands make light and fast work! Hoy-Scott Watershed Volunteers during our fourth annual fin-clipping exercise

Sedated coho fry. 

Over 6000 coho fry marked at Hoy Creek Hatchery

A HSWS volunteer carefully clips the adipose fin of a sedated coho fry

On June 21st, 2016 the Hoy-Scott Watershed Society conducted another successful fin-clipping exercise with over 6000 young coho salmon which had been thriving in the Capilano trough room of the hatchery located on Hoy Creek since approximately December 2015.

"This was our third year of doing the fin clip exercise to identify our fish as 'hatchery' salmon," said hatchery manager, Rodney Lee. The fish are first sedated, and then the adipose-fin (small top back fin) is carefully snipped off. The entire operation is overseen by the Department of Fisheries.

"We clipped over 6000 fry in two hours thanks to our volunteers," said Rodney. "The fish recover quickly and will be moved to our rearing pond in a few days, where they will live until their release next May. They will then head out to the ocean, and when they return, this is our way of identifying them."

Volunteers work diligently,  and quickly clipping and counting coho fry

View our entire PHOTO ALBUM on Facebook HERE.

Under the supervision of the Department of Fisheries, Hoy Creek Hatchery held another successful fin-clip exercise of over 6000 coho on June 21st.