Eric J. Nagid

Variability in Haul Seine Retention Rates and its Effects on Abundance and Size Structure Estimates of Black Crappie and Sunfish Populations

SEAFWA Journal Volume 2, March 2015

Gear catch efficiencies have a large effect on data collected to describe fish populations and communities used by managers to make informed decisions. We measured the retention rate of black crappie (Pomoxis nigromaculatus) and sunfish (Lepomis spp.) from a seeding experiment composed of 10 haul seines pulled at three lakes. Approximately 50 individuals of each group were marked and placed into closed haul seines, and fish recovery rates were measured. Retention rates ranged between 0.34 and 0.94 for black crappie and 0.38 and 0.89 for sunfish. Akaike's Information Criterion was used to...

Using Remote Sensing and GIS to Quantify Fish and Wildlife Habitat in Orange Lake, Florida

SEAFWA Journal Volume 2, March 2015

In 2005, the Florida Fish and Wildlife Conservation Commission implemented a team approach to guide holistic management of Orange Lake, Florida (5100ha). In 2007, 2010, and 2013, we evaluated the lakewide composition of aquatic plant communities and quantified their habitat benefits for focal fish and wildlife taxa. We found that habitat conditions in Orange Lake varied with changes in water level and all three years exhibited an excess of shrub swamp habitat (400-481 ha) and a shortage of shallow marsh habitat (65-160 ha). Overall habitat value for the group of focal taxa was greatest in...

Habitat Use of Suwannee Bass and Largemouth Bass in the Withlacoochee River, Florida

Fisheries Outstanding Technical Paper

We investigated the microhabitat selection of largemouth bass (Micropterus salmoides) and Suwannee bass (M. notius) using multivariate logistic regression modeling. Relative use probabilities for cover types were similar among juvenile and adult bass of both species with minor differential use. However, the water velocity and depth selection functions between juveniles were associated with slow and shallow locations, while the selection functions between adults were associated with intermediate speeds and depths. The predictive abilities of the habitat selection models significantly...