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Thumbing through Slime Mold Identification & Appreciation page and delighted to see the beauty of iridescent of Lamproderma slime molds and the colours found in a variety of slime molds. Have you found a slime mold to share on this page?
Rare bird alert— Canada’s first Red-backed Shrike was found in Powell River on Thursday:
RBA: RED-BACKED SHRIKE in Powell River - Oct 22-24th
bcbirdalert.blogspot.com
At 1:15 pm on Oct 22-2020, Iwan Van Veen found a Red-backed Shrike on Fernwood Ave in Powell River. The bird was hunting from the powerlines...Have you wondered about the life span of a sea urchin?Red Urchin in the forest. This individual may be 100 years old . . . or older. Really.
Research has also found that there is no diminished fitness with age in this species i.e. there is no senescence. The older Red Urchins are in fact the ones that produce the most eggs and sperm. They also continue to grow throughout their lives albeit at a very slow rate.
And a bad pun: I urchin you to share this #DailyDoseOfDepth with a friend. 🙂
Age determined by (1) tagging individual sea urchins and injection with tetracycline, which becomes incorporated into the sea urchin skeleton and can be used to track the growth rates and (2) measuring carbon-14, which has increased in all living organisms following the atmospheric testing of atomic weapons in the 1950s.
Strongylocentrotus franciscanus to 30 cm across. If you look closely you can see the tube feet among the spines.
Photo: ©Jackie Hildering; The Marine Detective
October 4th near Telegraph Cove.
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Research:
- Amir, Y.; Insler, M.; Giller, A.; Gutman, D.; Atzmon, G. Senescence and Longevity of Sea Urchins. Genes 2020, 11, 573. www.mdpi.com/2073-4425/11/5/573/htm
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Ebert, Thomas. (2008). Longevity and lack of senescence in the red sea urchin Strongylocentrotus franciscanus. Experimental Gerontology. 43. 734-738. 10.1016/j.exger.2008.04.015. www.researchgate.net/publication/222349781_Longevity_and_lack_of_senescence_in_the_red_sea_urchin...
#MarineBiology #Urchin
Category Archives: News
Cowichan native flora presentation and walk
Members of Comox Valley Nature (and others) may be interested in a native flora presentation and walk to be held in the Duncan area on October 29. This event will be led by Genevieve Singleton who is a friend of … Continue reading
Public invited to learn about humpback whales in our waters
Comox Valley Nature is pleased to host a free online lecture by Jackie Hildering. The lecture entitled The Return of Giants! is on Sunday October 18, 2020, 7:00 – 9:00 pm. Given the current situation with the Covid-19 virus, Comox … Continue reading
2020 CVN Tree of the Year winner announced!
Submitted by Fred N. on behalf of the Tree of the Year committee. When I heard one of the Tree of the Year nominees was a yellow cedar in Royston I became intrigued. Yellow cedar (Xanthocyparis nootkatensis, formerly Chaemacyparis nootkatensis) on … Continue reading
Public invited to learn about the Canada Jay in Strathcona Park
Comox Valley Nature is pleased to host an online lecture by Dan Strickland. The lecture entitled 2020 Update on Paradise Meadows Canada Jay Research is on Sunday September 20, 2020, 7:00 – 9:00pm. Given the current situation with the Covid-19 … Continue reading