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Table 9. Summary of other scup 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 stomach
content dry weight (TDW), and an index of relative importance (IRI), as
available from each source.)
|
|
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 |
1896-99 (summer) |
51 ("YOY") |
FO? -- Copepods and small crustaceans. |
| 58 ("adults") |
FO? -- Small fish, squid, polychaetes, crabs,
shrimp, amphipods, mollusks, and hydroids. |
| Richards (1963) |
Long Island Sound - sand station |
1956-57 (seasonally) |
167 (2-15) |
FO -- Polychaetes (Ampharete sp.),
copepods (Pseudodiaptomus coronatus), and amphipods (Photis sp. and Leptocheirus pinguis). |
| Bowman et al. (1987) |
Southern New England |
1973-76 (spring/fall) |
367 (<15) |
TW -- Polychaetes, amphipods, decapod crustaceans
(Atlantic rock crab), and squid. |
| Sedberry (1983) |
New York Bight |
1976-77 (seasonally) |
138 (5-15)
|
IRI -- Amphipods (hyperids and gammarids) and
polychaetes (Potamilla reniforma and Glycera) |
102 (15-30)
|
IRI - Polychaetes, gammarid amphipods (Ericthonius sp.), and decapod crustaceans (Atlantic rock crab) |
| Steimle (unpubl. data) |
Raritan Bay |
1976 (Mar-Jun) |
13 (YOY) |
FO -- Asabellides oculata, copepods,
polydorid polychaetes, Mulinia lateralis, blue mussel spat, and
hydroids. |
| Michelman (1988) |
Narragansett Bay, RI |
1987 (seasonally) |
66 ("juveniles") |
TDW -- Polychaetes (maldanids, Nephtys
incisa, Nereis sp., and Pherusa affinis), Pagurus sp., Neomysis, amphipods (L. pinguis, etc.), mollusks, Ceriantheopsis americanus, and fish larvae. |
| Steimle et al. (unpubl. data) |
Delaware Bay |
1989-94 (May/Jun, Aug/Sep) |
246 (9.0-28.0, mean = 14.2) |
TV -- blue mussels, Ensis directus,
unidentified mollusks, Metridium senile, Dyspanopeus sayi, Neomysis, Atlantic rock crab, and unidentified fish remains. |
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