Deree: Age and growth, dietary habits, and parasitism of Enchelyopus cimbhus 



51 



not account for seasonal variation and because the 

 sample size of 8- and 9-year-old fish was low. 



The definitive hosts of adult trypanorhynchs are 

 elasmobranchs, suggesting that fourbeard recklings 

 are consumed by elasmobranchs or act as paratenic 

 hosts. It is likely that barndoor skate. Raja laevis, 

 and thorny skate, Raja radiata, prey upon E. 

 cimbrius. Raja laevis and R. radiata >700 mm TL 

 forage primarily on fish that include hake, Urophycis 

 spp., and whiting, Merluccius spp., and may also feed 

 on cod and haddock (Bigelow and Schroeder, 1953; 

 McEachran et al., 1976). Because both jRqya spp. con- 

 sume fishes with similar habits and are definitive hosts 

 for G. erinaceus (Margolis and Arthur, 1979), it is prob- 

 able that/?, laevis andi?. radiata prey upon E. cimbrius. 



Acknowledgments 



I am indebted to. J. G. Hoff, S. A. Moss, R. A. 

 Campbell, and K. Oliveira for their critical review 

 and guidance throughout this project. I am grateful 

 to the National Marine Fisheries Service Survey and 

 the Age and Growth Divisions in Woods Hole, MA, 

 and to the Massachusetts Division of Marine Fish- 

 eries for their collection assistance and use of equip- 

 ment. I would like to thank L. Measures for her assis- 

 tance in nematode identification. Special thanks are 

 given to L. Curran, R. P. Glenn, and J. A. and J. Fowler 

 for their efforts. This manuscript was part of a thesis 

 submitted in partial fulfillment of the requirements for 

 the M.S. degree in marine biology at the University of 

 Massachusetts, Dartmouth, and is dedicated to M. A. 

 Rousseau and V. A. Nordahl for inspiration. 



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