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throughout project area; is the primary seagrass in |
higher salinity areas |
Table 3b |
Salinity and Habitat Requirments of Potential Faunal Indicator Species |
Species |
Substrate |
&/or |
habitat |
Comments |
Invertebrates |
Callinectes sapidus |
Blue crab |
5-28 0-34 Sand, salt |
marsh |
Salt marsh habitat important nursery for juven-iles; |
adults in creeks, rivers and estuaries |
Crassostrea virginica |
American oyster |
7-39 |
15-26 |
0-42 |
14-30 |
Solid |
substrate |
Although tolerant of varying temp, salinity and |
water quality conditions, preferred S% as noted |
Farfantepenaeus |
duorarum |
Pink shrimp |
5-47 25-45 |
Over |
seagrasses |
Biscayne Bay population continually recruits from |
and returns to Tortugas grounds to the west; |
economically valuable species |
Limulus polyphemus |
Horseshoe crab |
10-15 5-34 Sand Suitable shoreline profile appears to be more important than salinity for successful reproduction |
Menippe mercenaria |
Stone crab |
> 20 6-40 Hardbottom |
juv-seagrass |
Habitats variable; nearshore shallow-water |
grassflats, hardbottom with sponges, rubble… |
Vertebrates |
Mammals |
Trichechus manatus |
W. Indian Manatee |
open water, |
seagrasses |
Inhabit fresh water, estuaries & marine environments. In Biscayne Bay, combination of warm |
water and fresh water in a predominately marine |
system causes aggregations |
Turciops truncatus |
Bottlenose Dolphin |
open water Inhabits primarily marine environments, although |
also present in estuaries |
Reptiles |
Crocodylus acutus |
American crocodile |
shallow open |
water |
Although tolerates wide salinity varioations, studies |
in BB documented approx. 45% of non-hatchling |
crocs were in s% of 1-5 ppt. |
Malaclemys terrapin |
tequesta |
Diamondback terrapin |
Estuarine |
waters |
Prefers shallow, medium-salinity estuaries, where it |
feeds on sanils, crabs and other invertebrates |
Birds |
Ajaia ajaja |
Roseate Spoonbill |
Sand Feeds in waters of varying salinities; but requires |
abundant supply of salinity-dependant small fishes |
to nest successfully |
Egretta caerulea |
Little Blue Heron |
Sand Feeds in shallow waters of varying salinities; nests |
successfully in coastal and inland areas |
Egretta rufescens |
Reddish Egret |
Sand Feeds in waters of varying salinities; but requires |
abundant supply of salinity-dependant small fishes |
to nest successfully |
Egretta thula |
Snowy Egret |
Sand Feeds in shallow waters of varying salinities; nests |
successfully in coastal and inland areas |
0-40+ |
0-40+ |
0-40+ |
Salinity |
(ppt) |
Juv. Adult |
0-40 |
pref < 20 |
0 - 35+ |
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