NOAA Teacher at Sea
Aboard R/V Hugh R. Sharp
June 8 – 15, 2010
Mission: Sea Scallop Survey
Geographic Location: off the coast of New England
June 15, 2010
Aboard: R/V Hugh R. Sharp
Weather Data at 1:30pm
EDT: Clear and sunny, 14.5˚C
Location at 1:30pm
EDT: Lat: 41 23.78 N
Long: 66 56.64 W
Water Depth: 68.2 m
8th Day at Sea
What kinds of things are you going to catch? Part 2 – non-fish along with a few new fishes
Sea Stars (aka starfish) – Every third dredge, the contents of the dredge are sampled and the sea stars are separated by species and counted. Most sea stars can regenerate a lost arm, but a few can regenerate an entire organism from the lost arm as well. All sea stars are predators; many species do eat scallops.
Hippasteria phygiana – a cushion star with a much wider central disk and shorter arms than the other types of sea stars.
Northern Sea Star (Asterias vulgaris) – is one of the more common sea stars found. It can have a radius of up to 20 cm.
Blood Star (Henricia sanguinolenta) – is a thin armed sea star that ranges in color from bright red to orange. This particular blood star shows some aberant regeneration occurring on one arm.
Leptasterias tenera – smaller sea stars than the others. They are usually whitish-tan. Some have purple centers and arm bands.
Sclerasteras tanneri – are spinier than the other sea stars seen. They are bright red with thin arms.
Spiny Sun star (Crossaster papposus) – is the only sea star that I’ve seen here with more than 5 arms. It has concentric rings of color radiating from the central disk of the sea star.
Green Sea Urchin (Strongylocentrotus droebachiensis) – can grow up to 8.3 cm wide and 3.8 cm high. The shell (test) is usually a greenish color and the spines are all approximately the same length.
Sand Dollar (Echinarachnius parma) – the common sand dollar. This species does not have openings in the test like the Keyhole type that is commonly found off the coast of the Carolina’s, but does have the flower-like markings on the dorsal side. A great many of these (hundreds of thousands) are found in the dredge on some tows.
Hermit Crabs (various species) – move from shell to shell as they grow.
Northern Lobster (Homarus americanus) – can grow up to 90 cm in length. Lobsters are scavengers and can be cannibalistic. Claws and tail are highly prized for meat.
Winter flounder (Pseudopleuronectes americanus) – are darker than the other flounder. Like summer flounder, they can change color to match the underlying ocean floor. Winter flounder can live up to 15 years. They can reach a maximum size of 64 cm and 3.6 kg, with the average being 31-38 cm and 0.7-0.9 kg. Winter flounder eat mostly small invertebrates, like polychaetes and shrimp and some small fishes. They are preyed upon by cod, skates, goosefish, and spiny dogfish. Winter flounder are the thickest of the flatfish, but are considered over-exploited.
Haddock (Melanogrammus aeglefinus) – a silvery fish that is dark grey on the dorsal side with a dark patch behind the gills. The largest recorded haddock was 111.8 cm long and 16.8 kg. The average haddock is 35-58 cm long and 0.5-2 kg. Small haddock eat crustaceans, polychaetes, and small fish, while larger haddock eat more echinoderms, but will eat most anything. Predators include spiny dogfish, skates, cod, other haddock, hakes, goosefish, and seals. Haddock aquaculture was begun in 1995. The biomass of haddock was considered below maintenance levels in the late 1990s.
Fawn Cusk-eel (Lepophidium profundorum) – are greenish with light green or tan spots down the sides and, unlike true eels, have pectoral fins. They average about 26 cm in length. They eat sea mice, shrimp, and echinoderms. Larger fawn cusk-eels eat flatfish as well. They are eaten by skates, spiny dogfish, hakes, flounders, and sea ravens.
Winter Skate (Leucoraja ocellata) – large, heart-shaped skate. Like the barndoor skate, winter skates can be quite large, up to 150 cm long. They eat bivalves, shrimp, crabs, echinoderms, and many types of fishes. They are eaten by sharks, other skates, and grey seals. They are considered to be commercially important.
I have to admit, when I first went up to the bridge of the ship, with its wrap-around windows, the first words that came to mind were the lines from Rhyme of the Ancient Mariner (which I may have not remembered entirely correctly)
Water, water everywhere
And not a drop to drink
Water, water everywhere
And all the boards did shrink