
the river and the land
18
amphipoda that join plankton on the banquet table for sunfish, shiners,
and bass, among others. Fish take their place as the food of choice for gulls,
herons, eagles, and ospreys — and of course, humans. ÷e land contributes
to the infinite cycle, too. Nitrogen Ïom soil bacteria and plants leaches
into streams that fÕd the Hudson to nurture aquatic life. Phosphorous, an
essential mineral required by every cell membrane, leaches Ïom weather-
ing rocks into plants and watershed runo°. ÷e cycle of birth, growth,
death, and rebirth is infinite.
Late in the Úentieth century scientists counted 206 species in the Hud-
son estuary. Five di°erent classes of fish are present: Ïeshwater, including
small and largemouth bass and silver, white, and yellow perch; catadromus,
fish that migrate Ïom Ïesh water to the sea to spawn, including the Ameri-
can Õl; anadromus, salÚater fish that ascend the Hudson to spawn in
Ïesh water, including shad, striped bass, Atlantic sturgeon, and tomcod;
salÚater fish, which spend their first year fÕding in Ïesh water, including
bluefish; and estuarine, which live mainly in the brackish waters of the
lower Hudson, including hogchokers. Most have originated in the river’s
mouth, but some, including the spotfin shiner (Notropis spilopterus) and the
central mudminnow (Umbra limi), swam east Ïom Lake Erie through the
Erie Canal.
÷e shÕr number of fish is astonishing. In the 1980s scientists found
that 3 to 4 million shad came to spawn in the Hudson each year, and, de-
pending on the time, the number of striped bass jumped Ïom a million
in the late summer and fall to tens of millions in the late spring when their
eÎs hatched.
÷e Hudson estuary allows “almost any species that occurs in the nearby
Atlantic” into the river, as one ichthyologist wrote, and marine strays are
more the rule than the exception; one count in 1995 found sevenÙ-seven
such stray species Ïom the ocean. Sharks swim upstream Ïom time to
time, as do the occasional skate, conger Õl, striped anchovy, Atlantic cod,
Atlantic mackerel, lined seahorse, Atlantic herring, and scores of others.
Occasionally an eddy Ïom the Gulf Stream that passes by the Lower Bay
proves particularly warm in August, which lures striped mullets, ladyfish,
and lookdowns into the river. Should they find a discharge pipe Ïom a
power plant, they have bÕn known to survive the winter.
Fish aren’t the only creatures to swim into the Hudson. In the mid seven-