We examined trends in abundance, size and age structure, and growth rates of blue catfish, Ictalurus furcatus, in Milford Reservoir, Kansas. Trends in abundance and size structure were assessed using fall gill net data collected during 1990–2001. Pectoral spines were collected from fish (N=30) captured during 2001 for age and growth analysis. Catch per unit effort was less than 5 fish per net night from 1990 to 1999. Catch per unit effort in 2000 was significantly (P=0.01) higher than in previous years and samples were dominated by fish <300 mm total length (TL). Seventy-four percent of blue catfish collected in 2001 were from the 1999 and 1998 year-classes, indicating natural reproduction. Mean back-calculated lengths at age indicated that fish require approximately 3 years to reach stock length (300 mm TL) and 5 years to reach quality length (510 mm TL). Growth of blue catfish in Milford Reservoir was similar to that of other populations throughout the midwestern and southeastern U.S. These data suggest that the blue catfish population in Milford Reservoir has increased in abundance and that natural reproduction is occurring. These data provide important baseline information for future comparisons of blue catfish population characteristics in Kansas reservoirs.
ACCESS THE FULL ARTICLE
Transactions of the Kansas Academy of Science
Vol. 106 • No. 3
October 2003
Vol. 106 • No. 3
October 2003