Osteology of the American Plaice
, Hippoglossoides platessoides.
The three species used in this project included two gadids, Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus), and one pleuronectid, American plaice (Hippoglossoides platessoides).
Amherst, Massachusetts 01003 Table 1 Summary information for all Atlantic cod (Gadus morhua), haddock (Melanogrammus aeglefinus), and American plaice (Hippoglossoides platessoides) sampled on Georges Bank (GB) and in the Gulf of Maine (GUM).
Further, to obtain the adult stages required for species identification of larval parasites from the gonad and digestive gland, we attempted to infect American plaice, Hippoglossoides platessoides, which is a host for several trematodes (Bray and Gibson, 1991).
We found no adult Neophasis in the digestive systems of the American plaice (Hippoglossoides platessoides) that we had attempted to infect, and thus we could not identify the species of Neophasis.
One adult digenetic trematode observed in the stomach of about 12% of the whelks was identified as Steringophorus furciger, a parasite previously reported from the stomach of whelks in the Mingan Islands by Hamel (1989) and from the stomach of American plaice in the Gulf of St.
Although there have been no prior attempts to use parasite assemblages in describing the stock structure of American plaice, parasitological surveys of plaice in the Northwest Atlantic have identified a number of potential parasite tags.
American plaice, 31 to 40 cm in total length, were collected from two locations in the southern Gulf of St.
Vitellogenesis in American plaice was seen to begin soon after spawning (Zamarro, 1992), as with Rikuzen sole.
As American plaice in the tail of the Grand Bank of Newfoundland become older, the number of eggs produced by females decreased (Horwood et al., 1986).
In September, NAFO ruled that key North Atlantic cod, redfish, American plaice
, witch flounder and capelin fisheries would be closed in 2000 because of over-fishing (see European Report No 2434).