Showing posts with label Daniel O'Toole. Show all posts
Showing posts with label Daniel O'Toole. Show all posts

Friday, July 25, 2014

Fishing and Lovell Island

So first of all, yes, I did hook the biggest fish of the day. That was me. Please, no applause - I'm much too humble for that. Of course, I didn't reel it in mind you; I have people for that.

Now for notes. I think they were better than my last batch, but could definitely use some work. I re-wrote some of them to organize them better (and because my little notebook got crushed in my bag), so hopefully they're readable.

This page describes our first task - which was to take the boat to the deepest and coolest waters in the harbor (the main shipping channel) and fish! Bruce mentioned that the water is cooler now than it was last year at this time, and that that would likely affect which species we encounter and what we'll find in their stomachs.

I attempted a few drawings of the sea worms we were using for bait as well.


Next I've got some notes on the fish we caught. The first was a black bass that was about 14". I noted that it had 4 fins behind it's head, two on the bottom and one on each side. It had a dorsal fin running from about 1/3 it's length back from it's head down to where the tail narrowed. It had a fin on the bottom just below where the tail narrowed (which i now know is an 'anal' fin), and then it's tail fin.

The first one we caught had a noticeable bump on the top and just behind it's head, which Bruce pointed out as a sign that it was in the process of changing from a female to a male. The eyes looked about 1/3" to me and it had two very small rows of teeth. It's scales were iridescent purple and blue in some areas and overall it had a black and white pattern.


 Here's a photo of the black bass:


 We caught 2 flounders as well one about 12" and the other 16". They were both right-sided meaning their bellies were positioned to the right









Here are my drawings of the bass and flounder:






When we got to the tide pools at Lovell island, the tide was still fairly low but was making it's way back in. I found my Asian shore crab, periwinkle, and some barnacles, and also picked up some slipper shells. Here are my notes and drawings of the slipper shells:




The periwinkle:


Two types of barnacle, that I believe are little greys (the small ones) and a northern rock (the larger one with ridges.





And finally here is my Asian shore crab:





And one more picture: this is Charlie, our boat captain cleaning the big striper we caught. when he cut open the belly there was nothing in there - I assume because the unusually cold water is affecting the population of whatever he would normally eat.







Friday, July 18, 2014

#Hashtag's 4th wheel

Sunday’s class was our first where we got to grab creepy things from their watery lairs and try and count their bits and pieces before they died. 

The dying part was sad. The creepiness was… creepy. And there was also a pretty unpleasant smell that was tough to wash off my hands afterwards. But it was also fun and fascinating! I think what really blew me away was just how many species can be found living on a single muscle (enough that I’m certain that I didn’t find all of them).

On to my observations: Our first stop was the Water Transportation Dock at Fan Pier Cove. We broke into groups and I somehow managed to glob onto team #, which was lucky for me (I believe we were the only team of 4). I worked with Daniela, Sonja and Chris, and I don’t think my observations would have been enough to identify all of these species without their help.

Here’s what I believe I saw on the Water Transportation Doc:

Sea Lettuce – this seemed to be everywhere we looked yet in small quantities. I definitely observed it here and at the Barking Crab docks. At first I confused it with another type of seaweed that was the same color but longer, which brings us to:

Kelp maybe? - I actually wasn’t able to identify exactly what the longer flat green type of seaweed was, besides that it’s not just bigger sea lettuce, an it’s probably some form of kelp.

Frayed Weed – I believe this is the type of reddish brown seaweed I saw on the north west side of the dock.

Lacey Red Weed – I think this is the finer red seaweed I observed on both docks.

Hollow Green Weed – these were the worm-like weeds on the north-east and south-east sides of the dock.

Barnacles – I believe the two types of barnacles I saw were the ‘Little Grey’ and the ‘Crenate’ (the muscle shell I looked at had many little greys and a single Crenate).

The green fennel-like seaweed I saw on the north west side of the dock may have been green sea fern, but I’m not sure. I didn’t get a picture of that one, and the pictures I’ve seen of green sea fern don’t look quite right.

Our next stop was the Barking Crab docks, and this is where we found the creepier (and more interesting) creatures. I pulled several muscles, some seaweed, a blob of bright orange, and a small crab from under one of the floating docks. Daniela, Sonja, Chris and I observed several species living on the muscles and in the seaweed. Here’s what I think I’ve identified:

Blue Muscles – though they were pretty well covered, the muscles we found appeared to be blue muscles.

Orange Sheath Tunicate – this was the orange blob I pulled out. Looking closely I could see that it was orange because of the tiny roundish orange structures that were inside a jelly like substance. Each of the round orange cells had a tiny spot on it that would have been the opening of tunicate.

Sea Pork – another orange tunicate, but this one had flower-shaped structures that were sparsely distributed.

Golden Star Tunicate – There were several star-shaped tunicates that I would have thought were different species but may just have been a variant of the Golden Star.

White Crusts – I’m not really sure of this one. I saw three different whitish crusty types of what I think were tunicates, but the description of this one most closely matches the one with distinct tubular structure. Unfortunately, it’s size range starts at 3 inches, so it may rule out any of the ones I observed (all of which were 1 to 2 inches or less).

Amphipods – Ok, so amphipods is not a species, but I was unable to identify the species of the two shrimp-like creatures we observed with yellow and black spotted and black and grey striped patterns. I am fairly certain that they are amphipods based on their overall look, their size, and the number of legs - 14 with the front two pairs thicker at the end (which are called gnathopods).

Skeleton Shrimp – I have no doubt that the longer, thin, shrimp-like (and sort of worm-like) creatures that had the look of a praying mantis were skeleton shrimp (which are actually amphipods).

Gulfweed Crab – the pattern on the small orange crab I found matches that of the gulfweed crab shown in the Peterson field guide. The size is off, but I’m not sure if that is because of how I measured my specimen ( I included outstretched legs). I measured it at 1 inch, where the guide indicates it grows up to ¾ of an inch. It’s close enough that I’m fairly confident this is the right species. 

Common Spider Crab – This was the ugly dark brown fella in the lobster trap with the round body and long arms.

Rock Crab – this was the large reddish-brown crab we saw in the lobster trap.


Northern Lobster – this was the lobster in the lobster trap. Of course.

Sunday, July 13, 2014

Ciabatta bait

After a lecture in the morning, our first day of field work started with a brief tour of some of the species that can be observed from Long Wharf. Just outside of the Marriott hotel we fed ciabatta bread to some pretty huge striped bass. I was surprised at how easy it was to start a bass feeding fest so close to shore, and at how big they were. I gather that Bruce is out there tossing quality North End food into the water on a regular basis, so that probably has a significant effect on the size of the fish.

Next up we saw what seemed to be a cormorant, diving for fish near the end of the wharf. His tastes seemed rather crude, so we gave him no Italian food.


On the side of a houseboat we looked at what looked like different types of seaweed. I didn't get a good picture of it, so I can't identify what types there were, but I did notice something bright orange among the leafy things; it looked a bit like mushrooms you might find growing on the side of a tree. I can't be sure, but they might have been orange sheath tunicates.

Before we got on the boat to tour the harbor, we took one more look at some species close to the shore. In this case there were some large stones covered in two types of seaweed and encrusted in barnacles.



Finally we boarded the boat for a tour of the harbor. I didn't observe much wildlife during the trip besides some humans having a bad day.


The harbor tour was nice. The sunburn I got was not. I'll be upgrading to 70 SPF for the next class.

Saturday, July 12, 2014

Whirly sink myths...

My name is Dan O'Toole. I'm a Solutions Architect at BU's Information Services and Technology department. I grew up in Dorchester and have lived in the Boston area for most of my life. I've spent a fair amount of time on Massachusetts beaches, I've visited some of the harbor islands from time to time, I've been on a few whale watches (sometimes with whales and sometimes just the watching), and I enjoyed all of it, so I'm sure I'll love this class. Although I'm also sure my pale Irish skin is not going to like spending all day on Islands with no shade.

On to the assignment:

Before our first field trip, I was fairly sure that in both hemispheres, water drains in a clockwise direction. My reason for thinking this, was based on the Simpson's episode when they go to Australia. If I remember correctly, Bart demonstrates that toilets flush in the opposite direction in Australia than they do in the Northern hemisphere. Assuming it was a joke, I remember looking that up afterwards and verifying that it wasn't true. But I apparently forgot HOW it wasn't true.

During the field trip, I was fairly certain that I saw the water draining counter-clockwise, but I doubted that perception. Partly because my classmates mostly saw a clockwise motion, and partly because it was just hard to tell from the angle I was looking.

After about 2 seconds of Googling (and several more minutes trying to find 'trusted' sources), I now know that the affect that started the myth of different drainage directions, the Coriolis affect, is not so strong that can affect plumbing. What does affect the direction is the shape of the basin, the motion that water is already going in (affected by how the water swirled on the way in, or by disturbing the water in some other way.

As for some trusted examples (I assumed that Snopes doesn't count), here are three websites from educational institutions that all debunk the sink/toilet Coriolis myth:


Penn State College of Earth and Mineral Sciences
From the website of Emeritus Professor of Meteorology, Alistair B. Fraser
http://www.ems.psu.edu/~fraser/Bad/BadCoriolis.html

From Cornell University's Curious about Astronomy question and answer site:
http://curious.astro.cornell.edu/question.php?number=516

From am old page on the webstie of John Baez who is a Mathematical Physicist at University of California Riverside:
http://math.ucr.edu/home/baez/physics/General/bathtub.html