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Aquatic Invasive Species Analysis
Zebra mussel and Spiny waterflea
Bythotrephes cederstroemi (spiny waterflea)
Adult and juveline individuals viewed under brighfield illumination
Bythotrephes cederstroemi (spiny waterflea)
Adult and juveline individuals viewed under darkfield illumination
Bythotrephes cederstroemi (spiny waterflea)
Adults carrying resting eggs and embryos, darkfield illumination
Bythotrephes cederstroemi (spiny waterflea)
Darkfield illumination
Bythotrephes cederstroemi (spiny waterflea)
Brighfield illumination
Bythotrephes cederstroemi (spiny waterflea)
Caudal curve observed under oblique illumination
Bythotrephes cederstroemi (spiny waterflea)
Caudal curve with denticles observed under oblique illumination
Zebra mussel veligers (Dreissena polymorpha)
Veligers observed under polarized light
Juvenile zebra mussel (Dreissena polymorpha)
Juvenile attached to vegetation found in plankton sample, and observed under polarized light
Juvenile zebra mussel (Dreissena polymorpha)
Juvenile attached to vegetation found in plankton sample, and observed under darkfield illumination
Juvenile zebra mussel (Dreissena polymorpha)
Juvenile attached to vegetation found in plankton sample, and observed under brightfield illumination
Fish larva
Larva observed under darkfield illumination
Plankton
Brightfield illumination
Fish louse or fish lice (Argulus)
Dorsal view under darkfiled illumination. Very common parasitic crustacean (ectoparasite) that have a negative impact on aquaculture.
Fish louse or fish lice (Argulus)
Dorsal view under oblique illumination
Fish louse or fish lice (Argulus)
Ventral view under darkfiled illumination
Caddisfly (snail-case makers, Family Helicopsychidae)
Found in plankton samples. Case made of rocks and with snail shape. This is meant to protect the larva.
Caddisfly larva (snail-case makers, Family Helicopsychidae)
Larva inside the case
Caddisfly larva (hump-less case makers, Family Brachycentridae)
Caddisfly larva (hump-less case makers, Family Brachycentridae)
Dinoflagellate (Ceratium sp.)
Gloeotrichia sp. (Cyanobacteria)
Filaments
Gloeotrichia sp. (Cyanobacteria)
Polarized view
Gloeotrichia sp. (Cyanobacteria)
Polarized view with a green filter
Photo gallery
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