Lamprey eels

Lamprey eels Fish researchers submit video magazine, record excessive survivability; much less than three percentage of fish lose tags

Genoa Blankenship, PNNL

Pacific Northwest National Laboratory has evolved a super-small acoustic monitoring tag designed in particular for juvenile lamprey and eel. In this video, PNNL researcher Alison Colotelo describes how she and her colleague Kate Deters inject younger lamprey with the PNNL tag.

Eric Francavilla | Pacific Northwest National Laboratory

A trio of PNNL fish researchers lately posted a video magazine article on a way to well implant miniature acoustic tags in juvenile Pacific Lamprey and American Eel and the way the tags ought to advantage migration.

The video magazine information laboratory trials the use of the tags from PNNL`s accepted Bio-Acoustics & Flow Laboratory. The tags, a part of PNNL JSATS`s monitoring suite, tune the lamprey and eel and offer records approximately their conduct close to hydropower dams.

The trials performed on juvenile lamprey and eel imply that the tags may be efficiently implanted on each species with out affecting their swimming capacity or survival. There is also minimum tag loss over the tag existence of 30 days.

A decline in fish numbers Lamprey eels

As the populace of the Columbia River Basin`s lamprey has declined over the last forty years, professionals had been getting to know approaches to keep the species close to hydroelectric centers, in particular dams.

Juvenile lamprey migrate deeper withinside the water column than juvenile salmon and are much less possibly to byskip thru the juvenile skip systems.

This makes it greater tough to come across the species and acquire records with different forms of monitoring transponders.

However, mastering approximately lamprey conduct and survival is essential for growing mitigation techniques for downstream passage, inclusive of skip gadget layout to be used at dams.

Eels raised on the Aquatic Research Laboratory

Eels swim inner tanks at PNNL’s Aquatic Research Laboratory. PNNL researchers are reading eel and lamprey conduct close to dams with the aid of using implanting each species with miniature acoustic tags.

Like the lamprey, the American eel populace has dramatically declined over the last numerous decades. The once-ample species has dropped with the aid of using 50 percentage in Chesapeake Bay and with the aid of using as tons as ninety seven percentage in Lake Ontario, consistent with reviews with the aid of using others that the researchers cited.

The species is presently indexed as endangered below the Ontario (Canada) Endangered Species Act. The improvement of hydropower centers additionally has created barriers for eels, which swim downstream.

A tag solution Lamprey eels

Before PNNL`s improvement of the micro acoustic tags, tags have been too massive to be efficiently implanted withinside the frame cavities of adlescent lamprey and eel.

PNNL`s micro acoustic tag is small and smooth to implant. It measures 12 millimeters in period with the aid of using 2 millimeters in diameter and weighs 0.08 grams in air.

The implantation of the tags doesn`t require sutures and entails a small incision of much less than three millimeters in period. The lamprey/eel tags emit specific coded signals, that are monitored thru self reliant receivers, or hydrophones, at constant systems or in-river receivers.

The group decided the tag did now no longer have an effect on or extrade the lamprey or eel`s swimming capacity. Less than three percentage of the lamprey misplaced tags and three.eight percentage of the eel misplaced their tags, researchers reported. None of the lamprey or eel died in the course of the 38-day maintaining period.

PNNL`s generation gives clinical records that may be used to increase techniques or designs for downstream passage.

For greater records on acquiring a license for the eel and lamprey tag, touch Sara eel2 Hunt, PNNL generation commercialization manager. Lamprey eels

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