maciej_wolf123's Favorites

Video: https://youtu.be/5h5q_rqZ2iQ

Single cell (in lorica) measures 21 µm x 6 µm

Site of collection: Katsurashima Ryokuchi south pond (a freshwater habitat), Sendai, Japan

Date of collection: September 18th 2021

Weather: Rainy

Water temp.: 21.3°C

pH 6.3

Bright field observation using a Wraymer microscope (model BX-3500TL, Osaka, Japan) equipped with a Floyd-2 HDMI ethernet digital camera (Wraymer, Osaka, Japan).

Video: https://youtu.be/DODeILO8WyI

Single cell (in lorica) measures 34 µm x 6 µm

Site of collection: Takamori Higashi Park (a freshwater habitat), Sendai, Japan

Date of collection: January 15th 2022

Weather: Snow/cloudy

Water temp.: 4.0°C

pH 6.0-6.2

Bright field observation using a Wraymer microscope (model BX-3500TL, Osaka, Japan) equipped with a Floyd-2 HDMI ethernet digital camera (Wraymer, Osaka, Japan).

Video: https://youtu.be/SfOreliFziw

Single cell (in lorica) measures 21 µm x 6 µm

Site of collection: Katsurashima Ryokuchi south pond (a freshwater habitat), Sendai, Japan

Date of collection: September 18th 2021

Weather: Rainy

Water temp.: 21.3°C

pH 6.3

Bright field observation using a Wraymer microscope (model BX-3500TL, Osaka, Japan) equipped with a Floyd-2 HDMI ethernet digital camera (Wraymer, Osaka, Japan).

Collected as part of community science effort led by @chyland Seen with @stephbrulot

Depth < 1 meter
Water Temp: 2.6 C
4 individuals found on a Potamogeton plant

Description per Hydra collecting for citizen scientists V.3 https://www.protocols.io/view/hydra-collecting-for-citizen-scientists-14egnzonpg5d/v3?step=4

Name of the location: Spectacle Lake Provincial Park

GPS coordinates: 48.577477, -123.569649

Date and time: December 28, 2023 at 1:33 PM

Brief description of the location: Loose mud bottom lake stocked with Smallmouth Bass and 2 species of trout.

Any wildlife observed: Numerous water mites freeswimming and freshwater sponges. Area where hydras collected dense with Potamogeton amplifolius, on which the Hydras were found

Human activity observed: Myself and Steph snorkelling and a couple dogwalkers.

Description of the weather including air and water temperature: Water temp 2.6 C, air temp I think 6-8C

Number of Individuals: 4 collected, no others seen (didn't look too hard after finding these as it was freezing cold and we didn't have much left in us)

Mag. 400x (1-3), 200x (4)

• A pond-side water sample (retentate) was taken on 10/14/2023 using a 10µ dip net to enrich for microorganisms. Air temp 58F.

Stalked heliozoan (eukaryotic amoeboid). All 3 shells each contain 1 or 2 cysts (a survival response resulting from my refrigerating the water sample?); a living cell would have an irregular margin. The first image features the shells while the second features the connecting stalks. Perhaps the arrangement of the shells reflects a familial relationship, with the central shell representing the mother the other 2 shells, the daughters.
essential references:

1. https://arcella.nl/clathrulina-elegans/
2. https://plingfactory.de/Science/Atlas/KennkartenProtista/01e-protista/e-Rhizopod/e-source/Clathrulina%20elegans.html

Mag. 400x

• A pond-side water sample (retentate) was taken on 10/14/2023 using a 10µ dip net to enrich for microorganisms. Air temp 58F.

Green amoeboid (filled with endosymbiotic Zoochlorella). I think this taxon has a single nucleus (labeled in images), and this particular nucleus candidate seems to crave recognition, popping into view like a rising sun! Another specimen of this taxon was observed from this same water sample https://www.inaturalist.org/observations/188436229. I could not identify the nucleus in this latter specimen.
Video of current specimen, https://youtu.be/F_HXMW2Nhx8.
Ref: https://arcella.nl/mayorella-viridis/