infection of Ascarophis and Corynosoma and of the 

 commensal Histriobdella reported from American 

 lobsters of the Mid-Atlantic Bight, southern New 

 England waters, and the Gulf of St. Lawrence, are 

 not large and could be attributed to differences in 

 sample sizes or season of sampling. Peculiarly, cysts 

 of the sporozoan Porospora sp. were not seen in Mid- 

 Atlantic Bight lobsters, but occurred in most lobsters 

 in the Gulf of St. Lawrence (Montreuil 1954; Boghen 

 1978) and were reported by Uzmann (1970) from 

 southern New England waters. Cysts of the trema- 

 tode Stichocotyle sp. were reported by Nickerson 

 (1895) from Penobscot Bay, ME, and from lobster 

 dealers in Boston, MA; by Linton (1940) from an un- 

 stated region, probably Woods Hole, MA; by Uzmann 

 (1970) from southern New England waters; and by 

 Montreuil (1954) from southern Nova Scotia or 

 southeastern New Brunswick. Nickerson (1895) 

 found the cysts only in the intestinal tract at the 

 union of the intestine and rectum. 



Literature Cited 



Boghen, A. D. 



1978. A parasitological survey of the American lobster 

 Homarus americanus from the Northumberland Strait, 

 southern Gulf of St. Lawrence Can. J. Zool. 56:2460-2462. 

 Elliott, J. M. 



1971. Some methods for the statistical analysis of samples of 

 benthic invertebrates. Freshw. Biol. Assoc, Sci. Pub. 25, 148 



P- 

 Linton, E. 



1940. Trematodes from fishes mainly from the Woods Hole 

 region, Massachusetts. Proa U.S. Natl. Mus. 88:1-172. 

 Montreuil, P. 



1954. Parasitological investigations. Rapp. Ann. Stn. Biol. 

 Mar. Dep. Peches Quebec, Contrib. 50:69-73. 

 Nickerson, W. S. 



1895. On Stichocotyle nephropsis Cunningham, a parasite of 

 the American lobster. Zool. Jahrb., Abt. Anat. Ontog. Tiere 

 8:447-480. 

 Simon, J. L. 



1968. Incidence and behavior of Histriobdella homari (An- 

 nelida: Polychaeta), a commensal of the American lobster. 

 Bioscience 18:35-36. 

 Uspenskaya, A. B. 



1953. The life cycle of nematodes of the genus Ascarophis van 

 Beneden (Nematodes - Spirurata). [In Russ.] Zool. Zh. 32: 

 828-832. (Translated by J. M. Moulton, Bowdoin College, 

 Brunswick, ME, 1966). 

 Uzmann, J. R. 



1967a. Histriobdella homari (Annelida:Polychaeta) in the 

 American lobster, Homarus americanus. J. Parasitol. 53: 

 210-211. 



1967b. Juvenile Ascarophis (Nematoda:Spiruroidea), in the 

 American lobster, Homarus americanus. J. Parasitol. 53: 

 218. 



1970. Use of parasites in indentifying lobster stocks. (Abstr.) 

 In Section II, Proceedings of the Second International Con- 

 gress of Parasitology, p. 349. J. Parasitol. 56(4). 



Yamaguti, S. 



1963. Classification of the Acanthocephala. Systema Helmin- 

 thum, Vol. V, Acanthocephala. Interscience Publ., 423 p. 



W. A. Van Engel 



R. E. Harris, Jr. 



D. E. Zwerner 



Virginia Institute of Marine Science 

 School of Marine Science 

 College of William and Mary 

 Gloucester Point, VA 23062 



RESILIENCE OF THE FISH ASSEMBLAGE 

 IN NEW ENGLAND TIDEPOOLS 1 



Factors regulating density and species composition 

 of tidepool fishes have been little studied, partic- 

 ularly in comparison to other elements of the inter- 

 tidal community (Gibson 1982). Twenty-two collec- 

 tions of fishes were made in two tidepools at the 

 Marine Science and Maritime Studies Center of 

 Northeastern University at Nahant, MA, during 

 summers from 1967 to 1985. Initially, the purpose 

 was simply to demonstrate to my summer class in 

 ichthyology the technique of collecting fishes with 

 rotenone. After several years, it became apparent 

 that there would be interest in examing long-term 

 effects of repeated poisoning of the same pools. The 

 purpose of this paper is to report the data from this 

 series of samples and to compare the resilience of 

 this New England tidepool fish fauna with studies 

 done in the Gulf of California (Thomson and Lehner 

 1976), the central California coast (Grossman 1982), 

 and South Africa (Beckley 1985). Unfortunately, 

 there are no other similar tidepools in the area, so 

 it was not possible to make control collections from 

 unsampled pools. 



Methods 



The same two tidepools were sampled each sum- 

 mer from 1967 to 1985. The tidepools are located 

 on the ocean side of East Point, in Broad Sound. The 

 higher pool is at about 2 m elevation and is about 

 1 m deep at high tide; the lower pool is slightly below 

 1 m elevation, contains extensive red and brown algal 

 growth, and is shallower. Average tidal amplitude is 

 slightly over 3 m. One collection was made each year 

 except for 1969, 1982, and 1983 when two collections 

 were made, spaced about 2 wk apart. Collections 



'Contribution No. 134 from the Marine Science Institute, North- 

 eastern University, Nahant, MA 01908. 



200 



FISHERY BULLETIN: VOL. 84, NO. 1, 1986. 



