
Fishes 
Species and Ecology 
Of the fishes found in ponds, ditches and creeks of the salt 
marsh studied, killifish predominated. Fundulus heteroclitus was partic~ 
ularly plentiful but F. majalis was also present. These killifishes were 
used as primary indicators of DDT effect. They ranged from less than 1 
inch to about 6 inches in length but individuals more than 4 inches long 
were uncommon except toward the mouths of creeks. The killifish, Cyprinodon 
variegatus, was common in the tide pools while the silverside minnow, 
\ienidia menidia, was common in creeks but rare in standing waters. An 
indication of the kinds and numbers of fishes in various locations of the 
marsh is given in the following record of preliminary seinings: 
JUNE 25 DITCH; Haul With Minnow Seine 
ie ifish Fundulus heteroclitus and Fundulus majalis 
1/o" —~ 3~3/ht nih = wk.” a 
JUNE 25 TIDE POOL; Haul With Minnow Seine 
330 Killifish F. heteroclit F. heteroclitus and F. ue ialis 5/8" — 2=1/2" 
3 i" 
27 Killifish Cyprinodon variegatus - oN" 
JULY 6 TI1Dée POOL; Haul With Minnow Seine / 
510 Killifa sh F ~ heteroclitus and F. na alis 3/4" - 2-5/8" 
30 Killifish Cyprinodon variegatus te. ot 
JULY 13 TIDE POOL; Haul With Minnow Seine 
———“¥30 Killifish F. heteroclitus and F. majalis 1/2" - 2-3/)" 
10 Xillifish Cyprinodon variegatus AU = lel /\" 
JULY 18 CREEK MOUTH; Haul With 1/h" Mesh Seine 
9 Killifish F. heteroclitus and F. majalis 1" ~ 5-3/" 
22 Silverside Menidia menidia 1-1/8" ~ |-1/8" 
341 Weakfish Cynoscion regalis 1" - 3" 
9 lizard Fish Synodus foetens 2-1/2" 
S Menhaden Brevoortia tyramus 1-7/8" - 3" 
2 Mullet Mugil cephalus 5-1/2" 
2 Puffer Spheroides maculatus 7/8" 
2 Fluke Paralichthys dentatus 6" & 13" 
1 Sea Robin Prionotus sp. * | 
1 Sea Bass Centropristes striatus 5-1/)" 
JULY 20 CREEK MOUTH; Haul with 1/4" Mesh Seine 
9 killifish F. heteroclitus and F. majalis 1-1/\" - 3-3/" 
21 Silverside Menidia menidia 1-5/8" — 3-3/" 
19 Menhaden Brevoortia tyrannus 2-1/2" — 3-1/i" 
8 Weakfish Cynoscion regalis 1-1/)" - 2-7/8" 
2 Sea Bass Centropristes striatus )-3/8" ~ 5-1/2" 

