@article{ozen_noble_2005, title={Assessing age-0 year-class strength of fast-growing largemouth bass in a tropical reservoir}, volume={25}, ISSN={["1548-8675"]}, DOI={10.1577/M04-036.1}, abstractNote={AbstractAge‐0 largemouth bass Micropterus salmoides were collected every 3 weeks from 1992 to 1994, every 6 weeks from 1995 to 1998, and about every 15 weeks from 1999 to 2000 by means of a handheld electrofisher in Lucchetti Reservoir, Puerto Rico. An extended hatching period (January to June) and a high (0.63–1.50‐mm/d) juvenile daily growth rate required high sampling effort because age‐0 largemouth bass recruited to the sampling gear between February and September. To assess whether the handheld electrofisher catch per unit effort (CPUE; fish/h) of age‐0 largemouth bass was a reliable estimator of relative year‐class abundance, we regressed the age‐1 largemouth bass CPUE obtained with a conventional boat electrofisher between 1994 and 2001 on the CPUE of age‐0 (<150‐mm) fish from the previous years. Simple linear regression analyses indicated that as much as 90% (P < 0.01; N = 7) of the variation in age‐1 CPUE could be explained by age‐0 mean CPUE. Early variation of year‐class abundance of largemouth bass can be detected efficiently with the handheld electrofisher, thereby allowing early evaluation of management options.}, number={1}, journal={NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT}, author={Ozen, O and Noble, RL}, year={2005}, month={Feb}, pages={163–170} }
 @article{ozen_noble_2005, title={Relationship between largemouth bass recruitment and water level dynamics in a Puerto Rico reservoir}, volume={21}, ISSN={["2151-5530"]}, DOI={10.1080/07438140509354416}, abstractNote={Abstract Recruitment of largemouth bass at age-1 in a Puerto Rico reservoir can be predicted from water level variables of the previous year. Age-1 largemouth bass electrofishing catch-per-unit-effort (CPUE) as an index of year-class strength varied five fold between 1994 and 2001 in Lucchetti Reservoir, Puerto Rico. The CPUE of age-1 largemouth bass was higher in years when the water level of the previous years (1993–2000) remained high during the spawning period (January-June). The greatest water level drop (11.2 m) during the spawning period was observed in 1999, resulting in a water volume decrease of 66.5%, which corresponded to the lowest recruitment (CPUE 24.2 fish·h−1). With only 2.6 m of water level drop and 18.3% water volume decrease during the spawning period, the 1995 largemouth bass cohort was the strongest (CPUE 128.3 fish·h−1). The effect of these hydrological variables on largemouth bass recruitment appeared to be exponential rather than linear. Age-1 largemouth bass comprise the majority of the fishable stock in Lucchetti Reservoir, and the stock is typically below carrying capacity. Thus, the potential exists to adopt a water level management plan during the spawning period of largemouth bass to ensure successful largemouth bass recruitment into the next year's fishable stock.}, number={1}, journal={LAKE AND RESERVOIR MANAGEMENT}, author={Ozen, O and Noble, RL}, year={2005}, month={Mar}, pages={89–95} }