[Nhcoll-l] preserving freshwater jellyfish (Hydrozoans)
Jean-Marc Gagnon
JMGAGNON at nature.ca
Thu Jul 9 14:52:25 EDT 2020
Thanks Paul,
Useful examples. I know that some of my comments came from zooplankton experts.
It is possible that observations for specific species of jellies and other zooplankters may have been apply to the broader group as a precautionary approach.
I don’t think it was an urban legend… ;0)
Jean-Marc
From: Callomon,Paul [mailto:prc44 at drexel.edu]
Sent: July 9, 2020 2:26 PM
To: Jean-Marc Gagnon <JMGAGNON at nature.ca>; Bentley, Andrew Charles <abentley at ku.edu>; Curtis Schmidt <cjschmidt at fhsu.edu>; nhcoll-l at mailman.yale.edu
Subject: Re: [Nhcoll-l] preserving freshwater jellyfish (Hydrozoans)
On display in the department we have a jar of six Cannonball Jellyfish (Stomolophus meleagris) in ethanol that are in fine condition, floating around like a lava lamp 50 years after collection. We also have a pair of Box Jellyfish that I moved from an unknown fluid to 80% ethanol about 15 years ago, and they too remain positively buoyant and in good, non-opaque condition (they might have been formalin-fixed). Finally I have a Pyrosome (tunicate) in 80% ethanol that is perfect after 18 years.
For many years I had a fine Velella that floated perfectly in 70% ethanol, but a few years ago its "sail" began to deflate and it eventually sank to the bottom of the jar. It seems OK otherwise, though.
Paul Callomon
Collection Manager, Malacology and General Invertebrates
________________________________
Academy of Natural Sciences of Drexel University, Philadelphia
callomon at ansp.org<mailto:callomon at ansp.org> Tel 215-405-5096 - Fax 215-299-1170
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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 Jean-Marc Gagnon <JMGAGNON at nature.ca<mailto:JMGAGNON at nature.ca>>
Sent: Thursday, July 9, 2020 1:16 PM
To: Bentley, Andrew Charles <abentley at ku.edu<mailto:abentley at ku.edu>>; Curtis Schmidt <cjschmidt at fhsu.edu<mailto:cjschmidt at fhsu.edu>>; 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: Re: [Nhcoll-l] preserving freshwater jellyfish (Hydrozoans)
External.
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
613 364 4066
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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<mailto:cjschmidt at fhsu.edu>>; nhcoll-l at mailman.yale.edu<mailto: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<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.austincc.edu%2Fsziser%2FBiol%25201413%2Fanimal%2520collections%2FSoft%2520Bodied%2520Invertebrates.pdf&data=02%7C01%7Cprc44%40drexel.edu%7C3be8f27744494ac597d608d8242be266%7C3664e6fa47bd45a696708c4f080f8ca6%7C0%7C1%7C637299118191596899&sdata=Z70QObwown1wXduM0cFZEldulwV745OE3feZOQrdSUs%3D&reserved=0>
Doesn’t address hydrozoans specifically but other soft-bodied organisms.
Then there is this: https://www.si.edu/es/object/yt_ry67AXwxM9o<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.si.edu%2Fes%2Fobject%2Fyt_ry67AXwxM9o&data=02%7C01%7Cprc44%40drexel.edu%7C3be8f27744494ac597d608d8242be266%7C3664e6fa47bd45a696708c4f080f8ca6%7C0%7C1%7C637299118191606894&sdata=Pu6j38Ks2fLs8Bxo2F8tLO4RLsWFUIMF930N8POYpag%3D&reserved=0>
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<https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fichthyology.biodiversity.ku.edu%2F&data=02%7C01%7Cprc44%40drexel.edu%7C3be8f27744494ac597d608d8242be266%7C3664e6fa47bd45a696708c4f080f8ca6%7C0%7C1%7C637299118191606894&sdata=RbKl62jwSzbqOD0Smni0BtzWDKp%2BGew7P18mwCMFxXo%3D&reserved=0>
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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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