KINNER and MAURER: POLYCHAETOUS ANNELIDS OF DELAWARE BAY 

 Table l. — Summary of collecting and environmental data for Delaware Bay area polychaetous annelids (areas shown in Figure 1). 



sects, medium sands (1.5-3.00) were restricted to 

 the ship channel, grading rapidly into finer sedi- 

 ments {7.04>) away from the channel. 



At the interidal site (E) just inside Cape Henlo- 

 pen (Figure 1), salinity ranged from 26.0 to 31.0%o, 

 but it became higher in trapped shallow ponds 

 during the summer. Sediment consisted of a fine 

 sand ( <2.0(t>) at the northwest end of the flat and a 

 coarse sand ( >0<i>) at the ocean end. Environmen- 

 tal data, including sediment distribution, surface 

 and bottom temperature, salinity, and dissolved 

 oxygen, are discussed more extensively by Maurer 

 et al. (1971), Maurer et al.,'' Kinner et al. (1974), 

 and Watling and Maurer (see footnote 6). 



Small Bays 



Delaware has several small bays (F), which 

 have received considerable attention in recent 

 years (Logan and Maurer 1975; Watling 1975; 



Brenum 1976; Maurer in press; Jones et al.^). In 

 Rehoboth Bay, salinity varied seasonally from 

 20.1 to 30.8%o and the average silt-clay in the 

 sediment was 40.3%. Salinities in Indian River 

 Bay ranged from 27.7 to 31.9%oat the mouth of the 

 bay and 7.5 to 19.3%o near the Indian River. Sedi- 

 ment was similar to that in Rehoboth Bay, except 

 that the bay mouth contained coarse sand and 

 shell fragments. 



Coastal Areas 



In coastal waters, collections were concentrated 

 at three sites (Figure 1; G, H, I). The annual mean 

 range of sahnity was 28.5-30. 7%o and 27.2-29.8%o 

 at Bethany Beach (G) and Hen and Chickens 

 Shoal (H), respectively. Sediment at the two sites 

 can be characterized as medium sand. Occasional 

 depressions and holes trapped finer grained sedi- 

 ment. The deeper areas of Hen and Chickens Shoal 



'Maurer, D., R. Biggs, W. Leathem, P. Kinner, W. Treasure, 

 M. Otley, L. Watling, and V. Klemas. 1974. Effect of spoil dis- 

 posal on benthic communities near the mouth of Delaware Bay. 

 Univ. Del., Coll. Mar, Stud. Publ, 200 p. 



*Jones, R. D., L. D. Jensen, and R. W. Koss. 1974. Environmen- 

 tal responses to thermal discharges from the Indian River sta- 

 tion, Indian River, Delaware. Rep. 12, Cooling Water Studies for 

 Electric Power Research Institute, Res. Proj. (RP-49). 



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