[Nhcoll-l] preserving freshwater jellyfish (Hydrozoans)

[Jean-Marc Gagnon]

Curtis,

Over my 40 years of work with invertebrates, I have to admit that I never had to fix and/or preserved jellies; my specialty being marine benthos. But I have been told a number of things about the preservation of plankton.

One is that some jellies do not like ethanol at all, even after fixation with formaldehyde. I believe that is the case for our small FW medusa Craspedacusta sowerbii.

The other issue, which is not necessarily one for jellies, is that specimens can become opaque once transferred in ethanol, hence obscuring internal structures that may normally be used for identification or determining the life stage.

In both cases, best to leave them in formaldehyde if possible.

I certainly would like to hear from others on the subject.

Jean-Marc

Jean-Marc Gagnon, Ph.D.
Curator, Invertebrate Collections / Chief Scientist
Conservateur, Collection des invertébrés / Expert scientifique en chef
Canadian Museum of Nature / Musée canadien de la nature
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From: Nhcoll-l [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of Bentley, Andrew Charles
Sent: July 8, 2020 11:23 PM
To: Curtis Schmidt <cjschmidt at fhsu.edu>; nhcoll-l at mailman.yale.edu
Subject: Re: [Nhcoll-l] preserving freshwater jellyfish (Hydrozoans)

Curtis

You may want to check this out:

https://www.austincc.edu/sziser/Biol%201413/animal%20collections/Soft%20Bodied%20Invertebrates.pdf

Doesn’t address hydrozoans specifically but other soft-bodied organisms.

Then there is this:  https://www.si.edu/es/object/yt_ry67AXwxM9o

Andy

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Andy Bentley
Ichthyology Collection Manager
University of Kansas
Biodiversity Institute
Dyche Hall
1345 Jayhawk Boulevard
Lawrence, KS, 66045-7561
USA

Tel: (785) 864-3863
Fax: (785) 864-5335
Email: abentley at ku.edu<mailto:abentley at ku.edu>
http://ichthyology.biodiversity.ku.edu<http://ichthyology.biodiversity.ku.edu/>

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From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu<mailto:nhcoll-l-bounces at mailman.yale.edu>> on behalf of "cjschmidt at fhsu.edu<mailto:cjschmidt at fhsu.edu>" <cjschmidt at fhsu.edu<mailto:cjschmidt at fhsu.edu>>
Date: Wednesday, July 8, 2020 at 9:37 PM
To: "nhcoll-l at mailman.yale.edu<mailto:nhcoll-l at mailman.yale.edu>" <nhcoll-l at mailman.yale.edu<mailto:nhcoll-l at mailman.yale.edu>>
Subject: [Nhcoll-l] preserving freshwater jellyfish (Hydrozoans)

All,

I am wanting to know the best way to preserve and store freshwater Hydrozoans. Formalin? Ethanol? Hand Sanitizer? Any and all information would be greatly appreciated. Thank you!

Curtis
________________________________



Curtis J. Schmidt

    Zoological Collections Manager

    Sternberg Museum of Natural History



    Instructor

    Department of Biological Sciences

    Fort Hays State University



    3000 Sternberg Drive

    Hays, KS  67601

    785-650-2447 (cell)

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