crabs, amphipods, insects

Optional Field Trip 4 - Provincetown

As expected, the Provincetown tidal flat did not fail - we found a plethora of sipunculans (Phascolopsis gouldi), holothurians (Leptosynapta tenuis),  polychaetes of many families (especially the bamboo worm, Clymella torquata), 6 types of bivalves (mainly the quahog, Mercenaria mercenaria) and only 1 gastropod (Littorina sp.). We did not find many nemerteans, or any moon snails, and no live crabs - just washed up lady crabs, Ovalipes ocellatus, and Atlantic rock crabs, Cancer irroratus.

Optional Field Trip 3 - Sandwich Town Beach

Our snorkeling trip to Sandwich Town Beach was planned for when the low tide coincided with full moon. We were relatively lucky with the visibility, but we likely went in a bit too early to see an army of crabs on the peat flats in shallow water.

Li Ling provided a report and photos in a ppt attached below.

Barnacles on the piling of MBL Dock

Barnacles on the piling of MBL Dock

Optional Field Trip 2 - Night Lighting

Our second optional field trip was on Monday night, Sept. 12th. We held two flashlights over the MBL dock in Eel Pond. Highlights included collecting 2 of only 3 Mnemiopsis ctenophores observed and a ?larval horseshoe crab. We mainly observed small crustacean zooplankton, and it is likely that most were copepods and some were gammarid amphiopods. We also spotted some caprellid amphipods and captured a shrimp. In terms of chordates... we collected and released a pipefish and saw other very translucent juvenile and possibly larval fish.

Lecture 7 - Arthropoda

Please log in to access readings from the Pechenik textbook below.

Harriet will be presenting the following paper (attached below):

Hoch, J.M. (2008) Variation in penis morphology and mating ability in the acorn barnacle, Semibalanus balanoides. JEMBE 359: 126-130.

Other readings from primary literature:

And the insects derived from...

Optional Field Trip 3 - Snorkeling at Sandwich Town Beach

Event date: 
Tue, 2011-10-11 16:00 - 18:30

Low tide at 5:30PM, full moon

Sunset 6PM

Bring snorkeling gear and dive lights if you have them.

Bring headlamps and/or flashlights for walking back to the car.

Link to Optional Field Trip 3 - Sandwich Town Beach Report

Class 7 at ESL

Event date: 
Thu, 2011-10-06 14:30 - 16:00

Link to Lecture 7 - Arthropods

Student presentation of paper 3

Green crab (Carcinus maenas) at Barnstable Harbor

Green crab (Carcinus maenas) at Barnstable Harbor

Examined on field trip in 2005.

Here's an interesting new paper on this species:

Optional Field Trip 1 - Snorkeling at WHOI Pier

Our first optional field trip was to the pier pilings in the small boat well at the WHOI pier and to the MBL pier by Garbage Beach on Weds., Sept. 7, 12:30-13:30.

Thanks to Maya for joining me to sample quickly at the pier before the Oceanus came back in, and then also thanks to Jeanette for being an intrepid new snorkeler in about 2-ft visibility waters!

Please see the attached file for notes on the 7 phyla that we sampled.

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