Table ft. List of taxa which were identified to genus or family. 



Taxa 



Program 



Reason Possible identification 



Ijpam spp. PL.l.T 



Me.nidia spp. PL,I,T,S 



\fyoxorpphalu!! spp. PI.,I,T 



rrinnotin: spp. P[.,,I,T,S 



Sciaenidae PI..,I,T 



Urophych spp. 

 Raja spp. 



PL.I.T.S 

 I,T 



1,3 



1,2,3 



2,3 



3 



2,5 



1,2,3 



Alosa aeslivalis, Alo!:a mediocrh, Alosa pseudoharengus, Alosa <;apidissima 



Anchoa hepSRtus, Anchoa mitchilU 



Bothus ocellatu.i, l.eft-eycd flounder 



Brevoorlia tyrannus, Clupea harengus, Alosa spp. 



Fundulm majalis, Fundulus heteroclitus 



Enchelyopus cimbrius, Gadus morhua, Mkrogadus lomcod, Pollachius virms 



Apeltes quadracus, Gasleroslpus aculeatus, Gasterosteus wheallandi, 



rungiiius pungilius 



Goblonellus botensoma, Mirrogobius thalassinnus, Gobiosoma bosci, 



Gobiosoma ginsburgi 



Liparis allantiais, Uparis liparis 



Menidia beryUina, Menidia menidia 



Myoxocephaius aenams, Myoxocephalus oclodecemspinosus 



Prionotus carolinw:, Prionotns evolans 



Rairdinlla chrysnura, Cynoscion regalis, JMostomus xanlhiirus, 



Menticirrhus saxarilis 



IJrophycis chuss, Urophych rcgia, Urophycis tenuis 



Raja erinacea, Raja ocellata 



Program: PI, " plankton (larval), I = impingement, T "' trawls, S - .seines 



Reason: 1 - Dirficult to identify using external features; 2 ^ Juveniles similar; 3 - Incorrect identincalion may have occurred; 

 4 ~ literature is not clear at species level; 5^ Too few collected for exact identification. 



Ichthyoplankton abundance estimates. Because the tchthyoplankton data collected had skewed distri- 

 butions, median rather than arithmetic densities (no./500 m ) of the most abundant icthyoplankton taxa 

 entrained (station EN) were used to describe temporal trends. These medians, also used for calculating 

 entrainment estimates, were determined from data collected during the period when each species occurred 

 annually. The period of occurrence was that time during which 95% of the annual cumulative abundance 

 occurred; the data falling in the two tails (2.5% each) of the cumulative frequency distribution were not 

 used to compute the medians. Median densities could not be calculated for any taxon that had many 

 zero observations within its annual period of occurrence because the resulting median would have been at 

 or near zero. Therefore, arithmetic mean densities (no./500 m ) were computed and used as an index of 

 relative abundance to rank all the species in the species list tables. Similarly, annual mean densities were 

 used to determine annual cumulative densities for the six most abundant taxa of ichthyoplankton. 



16 



