3-11. Two scanning electron micrographs (about 10,000 x) — uppermost (a) of cod, Gadus callarias, chorion and 



bottom (b) of pollock, Pollachius virens, chorion — are examples of striking pore patterns 25 



3-12. Normal mitotic divisions in normal stage II (morula) embryo of silver hake, Merluccius bilinearis 26 



3-13. Characteristic pattern of grossly abnormal mitoses and cell deterioration observed in similar stage of the 



fourbeard rockling eggs from area contaminated by gasoline 26 



3-14. Survey area and station locations for RV Stricter cruise 78-01 27 



Tables 



1-1. Summary of station locations and hydrographic data from RV Stricter cruise 78-01 in the area of the grounding 



of the Ocean 250 3 



1-2. Summary of samples collected on RV Stricter cruise 78-01, 17-20 March 1978, in the area of the Ocean 250 



grounding 4 



1-3. Summary of fish and invertebrate species collected on RV Stricter cruise 78-01, 17-20 March 1978, in trawls and 



by dredge in the area of the Ocean 250 grounding; selected species were analyzed for hydrocarbons 5 



2-1. Components of the Ocean 250 gasoline tentatively identified by mass spectrometry 6 



2-2. Concentrations of gasoline range hydrocarbons in water samples taken off Watch Hill Reef 6 



2-3. Plankton samples — collection data (20 March 1978) 8 



2-4. Glass capillary analytical conditions 10 



2-5. Concentration of gasoline range hydrocarbons in plankton samples collected near the site of the Ocean 250 



grounding 10 



2-6. Data summary of hydrocarbon analysis of fish samples collected near the site of the Ocean 250 grounding 13 



3-1 . Grab sample descriptions 16 



3-2. Benthic fauna recovered from grab samples in the vicinity of Watch Hill Reef 18 



3-3. Summary of plankton samples collected on RV Stricter cruises 78-01 and 78-02 in the area of the Ocean 250 



grounding 21 



3-4. Relative abundance indices for zooplankton from plankton stations, Ocean 250 spill 22 



3-5. Cytological-cytogenetic estimates of fourbeard rockling eggs moribundity 2 d after the Ocean 250 gasoline 



spill 27 



3-6. Cytological-cytogenetic estimates of fourbeard rockling moribundity 4 d after the Ocean 250 gasoline spill 28 

 3-7. Cytological-cytogenetic estimates of yellowtail flounder egg moribundity 4 d and 25 d after the Ocean 250 



gasoline spill 28 



3-8. Cytological-cytogenetic estimates of fourbeard rockling egg moribundity 25 d after the Ocean 2650 gasoline 



spill 28 



IV 



