#crayfish — Public Fediverse posts

💁🏻‍♀️ TIL: 🦞🎒 #US #Fish and #Wildlife biologists are testing tiny photo-IDs attached as "backpacks" to #endangered Big Sandy #crayfish in #Appalachia.

Because injecting a #chip would harm the 10 cm (4 in) #crustaceans, researchers superglue a batter-free PIT tag to each #shell and set it with baking soda water. The setup was first tested on a common surrogate species, and the tags letting go are actually a sign the crayfish survived long enough to molt.

👉 https://www.popsci.com/environment/backpacks-crayfish-superglue/

#conservation #wildlife #biology #science #endangeredspecies #nature #animals #research #freshwater #water #fieldwork

Eager Beavers - Rodents Engineer Czech Wetland Project After Years Of Human Delay [ecosystem engineers]
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https://www.theguardian.com/world/2025/feb/11/beavers-save-czech-taxpayers-by-flooding-ex-army-training-site <-- shared technical media article
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https://en.wikipedia.org/wiki/Beaver-engineered_dam_in_the_Czech_Republic <-- shared wiki technical page
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https://phys.org/news/2025-02-fine-beavers-czech-treasury-million.html <-- shared technical article
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https://youtu.be/GSTw8qmBP4Y?si=XK2Iy2pAltW91flj <-- shared video (Czech)
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H/T @ScienceGirl
"We don't expect any conflict with the beaver in the next 10 years," ~ Bohumil Fiser from the Czech Nature Conservation Agency
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“For seven years, planners struggled to complete a $1.2 million wetland restoration project in the Brdy region of the Czech Republic. The goal was to build a dam that would improve water management and bring back valuable wetland habitat, but the project remained trapped in a maze of permits and approvals.
Then a family of eight Eurasian beavers did what engineers had planned… without permits, machinery, or a budget.
The beavers built a network of dams in almost the exact area chosen for the proposed project, naturally restoring the wetland system officials had spent years trying to create. After seeing the results, authorities decided there was little point continuing with the original human-built dam.
Although some reports suggested the beavers completed the work overnight, experts say their construction likely took several weeks. The reason it seemed sudden is that the animals quietly worked away until their finished dams became impossible to miss.
Beavers are known as “ecosystem engineers” because their behaviour can reshape entire environments. By cutting trees and blocking streams, they create ponds and wetlands that support countless species, including fish, amphibians, insects, birds, and mammals.
Their wetlands also act as natural water reservoirs, helping during droughts, reducing flood risks, filtering water, storing carbon, and keeping landscapes wetter during wildfires…
Once heavily hunted across Europe, beaver populations have been recovering thanks to conservation efforts, proving that sometimes nature can solve problems humans spend years trying to fix…"
#water #hydrology #KlabavaRiver #Czech #BrdyRegion #protected #CzechRepublic #armytraining #military #beaver #Eurasianbeavers #dam #beaverdam #waterquality #restoration #biodiversity #crayfish #wetland #ecology #benefits #Beavers #NatureBasedSolutions #Wetlands #Ecology #Biodiversity #Agroforestry #EnvironmentalScience #Conservation #Wildlife #Ecosystem #bioviversity #conservation #restoration #landscaperecovery #EcosystemEngineers #nature #floodmanagement #FloodMitigation #flood #flooding #energy #floodrisk #sustainability #wetlands #hydrography #dams #impoundment #deadwood #waterresources #landscapeengineer #agriculture #benefits #vegetation #ecology #ecosystem #riversystemsstabilisation #naturalwaterregulation #resilience #drought #wildfire #valleysreborn #slowdetermination #fisheries #invertebrates #extremeweather #floodflows #sediment #baseflow #drought #landmanagement #naturalsystems #landuse #ecosystemengineers #watermanagement

The Köpenick district of Berlin received its name thanks to a talking crayfish.

#Germany #folktale #folklore #crayfish
https://wiki.sunkencastles.com/wiki/The_Name_of_K%C3%B6penick_and_the_Large_Crayfish_of_Stralow

"The fight to save Australia’s ‘incredibly captivating’ endangered spiny crayfish"

#Australia #Crayfish #Animals

https://www.theguardian.com/environment/2026/jun/08/australia-endangered-spiny-crayfish-protection

This week’s Fossil Friday is the preserved cast of a late Cretaceous crayfish, Eryma ornatus, found in Southern Alberta.

It was found by Lawrence Halmrast and is APS 1990.011. Photo credit Howard Allen.

#palaeontology #paleontology #fossils #crayfish #alberta #fossilfriday

New publication: Managing #invasive alien #crayfish in isolated #water bodies: Evaluating control #strategies for #biodiversity #conservation.
https://doi.org/10.1051/kmae/2025031

Carthaginian coin with a crayfish, Sicily, Italy, ~3rd century BCE?

https://piefed.social/c/historyartifacts/p/1895184/carthaginian-coin-with-a-crayfish-sicily-italy-3rd-century-bce

One of the highlights of my day was when William Harland, a talented ecology undergrad here at #LincolnUniversityNZ, stopped by my office to show me his photos of temnocephalid flatworms. These distinctive squat tentacled flatworms live in colonies on NZ's freshwater crayfish, koura, and eat scraps left over when the koura feed. They apparently cause no bother to the koura.

William found these at Poolburn Reservoir in central Otago.

Amazing!

The photo is CC-BY William Harland: https://inaturalist.nz/observations/341041723
Here are more photos of these crazy flatworms on #iNaturalistNZ: https://inaturalist.nz/observations?verifiable=true&taxon_id=868829&place_id=6803&preferred_place_id=6803

#invertebrates #flatworms #NaturalHistory #NZ #Freshwater #crayfish #crustaceans #nature #crayfish

Calculate and Visualise Flow Direction in QGIS

https://videos.qwast-gis.com/w/3bvhX8c3i8tscFSaTfTajx

The Köpenick district of Berlin received its name thanks to a talking crayfish.

#Germany #folktale #folklore #crayfish
https://wiki.sunkencastles.com/wiki/The_Name_of_K%C3%B6penick_and_the_Large_Crayfish_of_Stralow

Lunch today. A kind gift from our lovely neighbour. It was yum! #aotearoa #doubtlessbay #crayfish

There is a rather dodgy crayfish living in the Schöpfs river.

#Germany #folktale #folklore #crayfish
https://www.patreon.com/posts/crayfish-and-134048172

#30DayMapChallenge, day 23: Process Flow directions in the French Alpes with a 5 m RGEALTI DTM (IGN France). Using #QGIS’s new native Fill Sinks (Wang & Liu), I calculated flow directions, converted them to a mesh via #Crayfish, styled with arrows, and visualised in #3D.   🎥 youtu.be/ttLxQBe0HIo

Calculate Flow Direction with ...

#30DayMapChallenge, day 23: Process
Exploring flow directions in the French Alpes with a 5 m RGEALTI DTM (IGN France). Using #QGIS’s new native Fill Sinks (Wang & Liu), I calculated flow directions, converted them to a GRIB mesh via #Crayfish, styled with arrows, and finally visualised the results in #3D. 🎥 https://youtu.be/ttLxQBe0HIo

#Lobster just tastes like #crayfish (#crawdads) without enough flavor...

National Lobster Day .

#lobster #seafood #lobsterairtawar #foodie #food #foodporn #shrimp #crab #seafoodlover #udang #redclaw #crayfish #lobsterairtawarindonesia #fish #budidayalobster #yummy #delicious #instafood #dinner #foodphotography #seafoodboil #kepiting #lobsterindonesia #foodstagram #lobstertail #bibitlobsterairtawar #lobsterroll #foodblogger #budidayalobsterairtawar #seafoodlovers

https://itsmostamazingindia.wordpress.com/2025/09/25/national-lobster-day/

I was at the bottom of a waterfall and this crayfish popped up to say hi.
#crayfish

You were all right about the cause of the small holes in the ground pictured above. The Museum of Victoria has adjudicated and declared that the holes are most likely caused by freshwater crayfish. Here is the message I received from them after I submitted the photo as suggested by @stib :

" As you can imagine it is hard to say the species for sure without seeing who is at the bottom of the burrow. It is most likely a species of freshwater burrowing crayfish from the genus Engaeus. From there the most likely maker of the burrow is the species Engaeus hemicirratulus, commonly known as the Gippsland Burrowing Crayfish. This species is known to construct burrows away from water and despite the name there are some locality records on the Atlas of Living Australia website below that come in pretty close to Toolangi."

https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/81b3504c-17e8-4a3d-a850-99a45c232006

#ToolangiForest #Melbourne #crayfish #Gippsland

There were several trout in this spot 😊
But what I got was this crayfish holding my little fly tightly 😅

#FlyFishing #Fishing #Hiking #Crayfish #Walking #Wildlife #Photography

🦞 How to photograph #crawfish / #crayfish for identification on #iNaturalist (or anywhere else).
https://www.inaturalist.org/journal/dan_johnson/16497

So, starting next week, appearing Mondays, Wednesdays, and Fridays, the 19th novelette: "Moon."

https://thecityofroses.com/chapbooks/no-19

#FantasyLit #SelfPublished #Zines #Crayfish