Freshwater fish communities



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Figure 4. Percentage brook trout habitat (dark green areas) in HUC10 watersheds in the Little Narragansett Bay watershed.

  1. Southwest Coastal Ponds




v.Fish Communities


In the three HUC12 subwatersheds in the Southwest Coastal Ponds watershed, Saugatucket River had 36 percent relative abundance for both cold-coolwater fish and fluvial fish, primarily due to brook trout and tessellated darter, and Ninigret Pond-Front Block Island Sound had 19 percent cold-coolwater fish and 14 percent fluvial fish, primarily due to brook trout (Table 6). No fish data were recorded for the Point Judith Pond-Frontal Block Island Sound subwatershed.
Table 6. Average of percent relative abundance for cold-coolwater fish and fluvial fish in subwatersheds of the Southwest Coastal Ponds watershed. SD = standard deviation.

Subwatershed Name

HUC12

No. Samples

Average Cold-coolwater Fish % (SD)

Average Fluvial Fish % (SD)

Saugatucket River

010900050401

1

36 (N/A)

36 (N/A)

Point Judith Pond-Frontal Block Island Sound

010900050402

No Data1

-

-

Ninigret Pond-Frontal Block Island Sound

010900050403

13

19 (30.7)

14 (30.3)

Watershed Name

HUC10










Frontal Block Island Sound

0109000504

14

21 (29)

15 (30)

1 There were no fish sampling stations within this subwatershed.

vi.Brook Trout Habitat


Overall, 27.4 percent of the area within the Southwest Coastal Ponds watershed could potentially provide habitat for brook trout, ranging from 13 percent to 40 percent within the HUC12 subwatersheds (Table 7 and Figure 5).
Table 7. Predicted or potential brook trout habitat in the Southwest Coastal Ponds watershed. Sorted by highest to lowest percent of brook trout habitat.

Subwatershed Name

HUC12

Brook Trout Habitat within

HUC10 or HUC12



Percent

Square miles

Saugatucket River

010900050401

40.4

6.9

Ninigret Pond-Frontal Block Island Sound

010900050403

24.9

6.9

Point Judith Pond-Frontal Block Island Sound

010900050402

13.3

1.5

Watershed Name

HUC10







Frontal Block Island Sound

00109000504

27.4

15.4




Figure 5. Percentage brook trout habitat (dark green areas) within HUC12 subwatersheds in the Southwest Coastal Ponds watershed.



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