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Table 7. Summary of other little skate diet studies for the
coastal Middle Atlantic Bight. (Major prey taxa ranked in relative order
of importance by: mean percent frequency of occurrence (FO), mean percent
contribution to total stomach content volume (TV), mean percent contribution
to total stomach content weight (TW), mean percent contribution to total
number of individual items in the stomach (TN), and an index of relative
importance (IRI), as available from each source.)
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|
Source
|
Study Area
|
Year(s)
(month(s), season(s),
and/or frequency)
|
No. Examined
(size [TL cm]) or
age range, mean size)
|
Primary Prey in Order of Importance
by FO, IRI, TDW, TN, TV, and/or TW
|
| Linton (1901) |
Woods Hole, MA |
1899 (summer) |
32 (unknown) |
FO? -- "Hermit, rock, blue, and mud crabs,
shrimp, amphipods, polychaetes, squid, clams, fish." |
| Field (1907) |
Woods Hole, MA |
1905 (summer) |
516 (~30-60) |
FO -- Crabs (rock, lady, mud, and hermit), Crangon, fish (sand lance, butterfish, herring, and bothid flounder),
squid, Nereis sp., Ensis directus, and amphipods. |
| Smith (1950) |
Block Island Sound |
1948-49 (seasonally) |
Unknown, ~200 (unknown) |
TV -- Leptocheirus pinguis, Atlantic
rock crab, Crangon, other crustaceans, polychaetes, mollusks, small
fish, and squid. |
| Fitz and Daiber (1963) |
Delaware Bay |
1954-55 (seasonally) |
185 (mean = 45) |
FO -- Crangon, Lepidonotus squamatus, E. directus, Nereis sp., Pagurus sp.,
and fish (northern searobin and windowpane).
TN -- Crangon and E. directus. |
| Richards et al. (1963) |
Long Island Sound |
1956-57 (seasonally) |
3 (9-11) |
FO -- Copepods, Neomysis, Heteromysis
formosa, and Crangon. |
| Vinogradov (1984) |
Georges Bank - Southern New England |
1968-74 (unreported) |
253 (unreported) |
TW -- Crustaceans, polychaetes, and fish. |
| McEachlan et al. (1976) |
Offshore |
1969-70 (seasonally) |
785 (mean = ~45-50) |
IRI -- Decapod crustaceans (Crangon,
etc.), amphipods (Leptocheirus pinguis, etc.), and polychaetes
(Eunice sp. and Nereis sp.). |
| Bowman et al. (1987) |
Southern New England |
1973-76 (spring/fall) |
168 (16-20) |
TW -- Crangon, Atlantic rock crab,
and other crustaceans. |
| Sedberry (1983) |
New York Bight |
1976-77 (seasonally) |
1,050 (5-30, disc width) |
TV -- Atlantic rock crab, Unciola irroratus, Byblis serrata, and juvenile red hake.
IRI -- Amphipods and decapod crustaceans. |
| Carlson (1991) |
New Haven Harbor, CT |
Sep 1989 - Nov 1990 |
115 (31-57) |
TW -- Atlantic rock crab, decapod crustacean
fragments, Ovalipes ocellatus, fish, and Crangon.
FO -- Atlantic rock crab, Crangon, O.
ocellatus, and Pagurus sp. |
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