Ichthyology
Ichthyology is the study of fishes. Fishes are aquatic,
cold-blooded animals that have backbones and have fins and gills
throughout life. This definition covers a wide variety of species
and, consequently, a great diversity of forms and habits. Currently
recognized as valid are about 25,000 extant species of fishes divided
into 57 orders and 482 families. The number of species of fishes
exceeds all other species of vertebrates combined. Although over 97%
of the surface water on earth is saltwater, about 41% of all species
of fishes live in freshwater. The large number of freshwater fishes
is a product of the propensity for populations in freshwater bodies
to become isolated, and then to differentiate and, eventually,
speciate.
Illinois Endangered and Threatened Fishes - Illinois Endangered Species Protection Board
INHS fish-related research and projects are listed in our Annual Reports.
See our Publications Catalog for fish-related material published at INHS.
Some past articles published in INHS Reports:
Largemouth Bass Recruitment and Stocking Strategies. Summer 2001
Physiological Telemetry in Fisheries Research. Spring 2001
Database Management and Analysis of Fisheries in Illinois. Fall 2000
Smallmouth Bass and Artificial Reefs in Lake Michigan. May-June 2000
Effects of Common Carp (Cyprinus carpio), an Exotic Fish, on Aquatic Ecosystems. January-February 2000
Quality Management of Bluegill Population Size Structure. July-August 1999
Species Spotlight: Orangethroat Darter. May-June 1999
The Naturalist's Apprentice: So Many Fishes! How can You Tell Them Apart?. May-June 1999
Development of an Individual-based Model to Evaluate Growth and Survival of Walleye. May-June 1999
INHS Fish Collection. March-April 1999
Development and Application of a Gambusia Bioenergetic Model. January-February 1999
The Round Goby: An Example of the "Perfect" Invader?. November-December 1998
The Bighead Carp (Hypophthalmicthys nobilis) in Reach 26 of the Mississippi River . November-December 1998
Channel Catfish Populations in the Upper Mississippi River System. September-October 1998
Hydroacoustics: A Tool for Understanding Fish-Habitat Associations in Rivers. November-December 1997
Understanding Large-river Fish Communities. September-October 1997
Differences in Food Consumption and Metabolic Rates Between Walleye Stock. July-August 1997
River Levels and Largemouth Bass Populations in the Illinois River. March-April 1997
Predicting Juvenile Fish Abundance from Charactersistics of the Spring Flood. January-February 1997
Critical Factors in the Early Life History of Illinois Fishes. November-December 1996
The Distribution of Aquatic Organisms in the Central Highlands. July-August 1996
Illinois River Fish Communities: 1960s Vs. 1990s. May-June 1996
Effect of Electrofishing on Sunfish. March-April 1996
Identification of Genetic Stocks in Midwest Game Fish. January-February 1996
The Round Goby Invades Lake Michigan. November-December 1995
Factors Affecting Growth of Reservoir Fish. May-June 1995
Small Impoundment Fisheries Research at Ridge Lake Station. March-April 1995
18 June 2002 cam (30 July 2011 gk)