18 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
5. UNALASHKA ISLAND TO UNIMAK ISLAND. 
HYDKOGRAPHIO WORK, DREDGINGS AND TRIALS FOR FISH. 
Hydrographic work . — The general contour of the slope approaching TJnalashka 
Island from the south was developed in the manner described above. Leaving Kiliu- 
luk Bay on the afternoon of July 21, the Albatross ran a line of soundings in a south- 
easterly direction, a distance of about 20 miles to the 100-fathom curve, which was 
traced approximately 95 miles northeasterly to latitude 53° 42' N., longitude 163° 
57' W., depth 95 fathoms, on the southern edge of Davidson Bank. Subsequently 
four lines of soundings were made inside of the 100-fathom curve between the Aleu- 
tian Islands lying to the eastward of Uualashka and the region of the Sannakh 
Islands, in part crossing Davidson Bank. A line was also run through Unimak Pass, 
off the southwestern end of Unimak Island, and thence from off the northwest cape of 
the latter island in a southwesterly direction to the north head of Akutan Island. 
After coaling at Iliuliuk, soundings were begun July 28 at the southern entrance to 
Uualga Pass, and carried thence in the direction of Davidson Bank. 
Depths of 30 to 72 fathoms were found in Unimak Pass, 71 fathoms at the southern 
entrance, and 80 to 85 fathoms at the northern entrance. 
Dredgings . — Four dredgings with the beam trawl were made in this region in 
close proximity to the land. Two hauls were made off the north head of Akutan 
Island at distances of 2 and 6 miles from land, in depths of 56 and 72 fathoms, the 
bottom consisting of black sand. One was off the southern entrance to Akutan Pass, 
in 45 fathoms, broken shells and pebbles, and the fourth was 10 miles farther to the 
eastward, off Rootok Island, in 54 fathoms, sand, broken shells, and pebbles. The 
fishes taken to the northward of Akutau Island were, ‘‘ cusk,” stellate flounders, sea 
ravens, scnlpins, and several small specimens of the family Agonidce. 
At the two stations to the southward of Akutau Island there were secured several 
species of flounders, a kind of lump-fish, a scaled sculpin, several species of Agonidce., 
one ray, and other small forms. Of invertebrates, crustaceans (especially crabs and 
shrimps), mollnsks, and echinoderms were exceedingly abundant in most of the hauls, 
and other groups were largely represented. 
Trials for fish . — The first trial for fish was made as the steamer approached Una- 
lashka, about 15 miles south of the entrance to Kiliuluk Bay in 84 fathoms; bottom, 
black sand and pebbles. One line, baited with salt clams, was put over at this sta 
tion, and the bait was seized almost as soon as the lead touched bottom, an ll-pound 
cod being secured. At three subsequent hydrographic stations during the day, on the 
slope between Unalashka and the 100-fathom line, the bottom consisting of sand, 
further trials were made, using from two to eight lines at a time. These trials were 
all successful, and at one station a chicken halibut weighing 15J pounds was captured. 
The total catch for the day was twenty two cod, one halibut, two flounders, and two 
sculpins. The average weight of the cod ranged from 8 to Ilf pounds; the average 
length, from 21 to 28f inches. Shrimps and small fish-bones were found in the stom 
achs of the cod, and a partly digested fish in that of the halibut. 
Directly off the southern entrance to Akutan Pass, in a depth of 45 fathoms, the 
bottom consisting of pebbles and broken shells, no success was had, but only one line. 
