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And I didn’t even know crayfish worms existed

12/29/2016

2 Comments

 
We missed a great opportunity at Black Rock this year: hunting for crayfish worms aka branchiobdellidans. These tiny critters (<12 mm) are worms of the phylum Annelida, the same group that includes leeches, earthworms, and polychaetes.

Branchiobdellidans spend their whole lives on the exoskeleton of crayfish like the ones inhabiting the streams of Black Rock Forest. Some species may be parasitic, others muralists, sometimes it depends on their population density, and in most cases, we just don’t what impact - if any - branchiobdellidans have on their crayfish hosts.  
Picture
https://parasiteecology.wordpress.com Yes, this is a cartoon I found about branchiobdellidans and their dispersal ecology. Just when does one exoskeleton get too crowded?
With so little known about its ecology, it should comes as no surprise that their evolutionary relationships relative to other annelids, especially the true leeches (Hirudinida) and freshwater parasitic worms (Acanthobdellida) is equally murky. This murkiness is at the center of Michael Tessler, Magda and Olivia’s SRMP research.

Long story short: if you use shared characteristics in sperm morphology to recreate evolutionary relationships, you would find Hirudinida and Acanthobdellida
to be more closely related. But if you use the CO1 and 18S genes,Hirudinida and branchiobdellidans are more closely related. 


Michael and his SRMP students are adding additional species and genes to form a more robust dataset to, hopefully, resolve the relationships. While Michael & Co work on that, I’ll practice saying “branchiobdellidans” 5x fast.
Picture
2 Comments
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7/27/2017 05:16:10 am

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11/14/2017 06:04:29 am

Wow, that's interesting. I think you're doing great job and I feel so proud because of it. I think every single person, no matter scientist or no, must be concerned about ecology problems. We live on this planet and we must treat it as good as possible

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  • Home
  • Research
    • Class of 2020
    • Class of 2019
    • Class of 2018
    • Class of 2017
    • Class of 2016
  • your srmp year
    • Schedule & Reminders
    • Summer Institute & Black Rock Forest
    • Finding & Reading Journal Articles
    • Creating a Scientific Poster
    • Writing the Final Paper
    • Prep for NYCSEF
    • Teen Health Resources
  • After SRMP
    • College Scholarships & Financial Aid
    • Kaplan Courses
    • Jobs & College Internships
    • High School Internships
    • Resumes & Cover Letters
  • FAQ