FISHERY BULLETIN: VOL. 74, NO. 2 



and by the enlarged abdomen of females. Scallop 

 anatomical terminology follows Bourne (1964). 



Larval Liparis were examined from monthly 

 collections of the National Marine Fisheries Ser- 

 vice (NMFS) laboratory at Sandy Hook in the 

 Mid-Atlantic Bight during 1966-67 (Clarke et al. 

 1969) and from routine plankton sampling on the 

 Woods Hole NMFS RV Albatross IV cruises 69-5 

 and 72-3 off southern New England, in the Gulf of 

 Maine, and on Georges Bank. The larvae of L. 

 inquilinus can be distinguished from those of 

 other Liparis which occur in the Mid-Atlantic 

 Bight and the Gulf of Maine by differences in 

 pigmentation pattern in combination with size at 

 hatching, disc formation, and notochord flexion 

 (Able 1974). The eggs were identified on the basis 

 of their similarity, in size of the egg and me- 

 lanophore pattern of the embryo, to eggs de- 

 posited by the laboratory population of L. 

 inquilinus. 



Juvenile L. inquilinus were collected from sea 

 scallops which were taken in otter trawls during 

 cruises of the Sea Breeze while on charter to the 

 Virginia Institute of Marine Science, and Alba- 

 tross IV cruises 69-11 and 70-6. Other L. in- 

 quilinus were collected from sea scallops on 

 Albatross IV cruises 68-14 and 69-8 with a 3-m 

 scallop dredge with a 5.1-cm ring bag which was 

 towed for 10 min at each station. On Albatross FV 

 cruise 68-14, bottom substrate type and amount 

 were estimated from the scallop dredge catch. 

 Size and number of scallops and regular hydro- 

 graphic data were also recorded. On Albatross IV 

 cruise 69-8, scallop dredge tows were replicated 

 every 2 h during a 24-h period on 4-5 August 1969. 

 The same general area was maintained during 

 sampling by using information from depth record- 

 ers and loran navigation. The scallop catch at 

 each station was divided into 5-cm height classes 

 and a representative number of scallops were ex- 

 amined for L. inquilinus from each size class. 



A large series of adult L. inquilinus collected 

 off the New Jersey coast in the 1930's was 

 examined from uncatalogued material of the 

 Academy of Natural Sciences of Philadelphia. 

 Other small collections were obtained from a 

 variety of sources that are too numerous to men- 

 tion here. 



Liparis inquilinus and sea scallops were col- 

 lected between lat. 39°30' and 40°10'N near Hud- 

 son Canyon in depths of 36-95 m and maintained 

 in 10 to 25 gallon aerated aquaria with sand sub- 

 strates for 15 mo. The aquaria were held in a cold 



room at 10°-11°C. Winter temperatures in aquaria 

 dropped as low as 4°C because of the absence of 

 heating facilities. Salinity varied from 23 to 42%o. 

 Illumination was provided by a 60-W bulb in one 

 corner of the room. This provided approximately 

 86 to 280-lx illumination for the aquaria, depend- 

 ing on their location in the room. The light cy- 

 cle was controlled automatically and approxi- 

 mated that in nature. Occasional power failures 

 caused irregular variation in photoperiod and 

 temperature. 



Liparis inquilinus were fed live amphipods, 

 usually Orchestia platenis and Gammarus mu- 

 cronatus, and the mysid shrimp Neomysis ameri- 

 cana and various other small crustaceans. Sea 

 scallops were fed a mixture of algae, Mono- 

 chrysis lutheri, Isochrysis galbana, and Phaeodac- 

 tylum triconutum, that was added to the unfil- 

 tered aquarium water. 



Pectoral fins ofL. inquilinus were sectioned and 

 stained with Harris' hematoxylin and eosin Y fol- 

 lowing fixation in 10% Formalin.^ 



LIFE HISTORY OF 

 LIPARIS INQUILINUS 



In the Mid- Atlantic Bight, spawning of L. in- 

 quilinus occurs near shore and away from scallop 

 beds in the winter. In the early 1930's, over 700 

 adult, sexually mature and maturing L. in- 

 quilinus were collected from mid-December 

 through April (Figure 1) off the coast of New Jer- 

 sey and Delaware. This species was found from 

 the Brigantine Can Buoy north of Atlantic City, 

 N.J., to near the mouth of Delaware Bay and in- 

 side the bay at Old Bare Shoal and in deep holes 

 off Brandywine (Shoal?) and Lewes, Del. Most of 

 the collections were in 7-14 m; however, part of 

 this series was from depths as shallow as 3-4 m 

 "off New England Creek (near Cape May Co.)." 

 Unfortunately, we have been unable to locate this 

 area in New Jersey. Recently (January-March 

 1971 and January-February 1973) other mature 

 adults were found off New Jersey, especially off 

 Little Egg Inlet in depths from 4 to 7 m. Sea scal- 

 lops were never taken in the vicinity of these col- 

 lections (D. Thomas pers. commun.). 



The average total length of L. inquilinus in- 

 creases from December through April (Figure 1). 

 Detwyler (1963) attributed an increase in total 



''Reference to trade names does not imply endorsement by the 

 National Marine Fisheries Service, NOAA. 



410 



