Effects of a Catch-and-Release Regulation on a Wild Trout Population in Colorado and Its Acceptance by Anglers

Long-term responses of a stream-dwelling grayling population to restrictive fishing regulations

“…Catch per unit effort as well as population density and number of trophy-sized grayling has increased over time in line with the results of other studies on salmonids (Andersson and Nehring, 1984;Carline et al, 1991). The results also indicate that the grayling population has improved in numbers and mean body size over the entire 10-year period since restrictive regulations were imposed.…”

“…This regulation has been a successful tool for increasing both standing biomasses and the proportion of trophy-sized trout in the catches. (Andersson and Nehring, 1984;. An important criteria for C and R angling is a low hooking mortality, reflected by reduced fishing mortality and increased survival of released fish.…”

Assessment of a brown troutSalmo truttapopulation in the River Gallo (central Spain): Angling effects and management implications (Salmonidae)

“…Thereby, an important decrease in abundance parameters was found in the exploited stocks. Similar results have been found by Anderson & Nehring (1984) in a Colorado river, who noted that a catch and release regulation exceptionally impoverished the densities and biomass of brown trout during four years of monitoring. In contrast, the exploited sectors studied as a control maintained their abundance parameters but at a lower level.…”

Decline in angler use despite increased catch rates: Anglers’ response to the implementation of a total catch-and-release regulation

“…Indeed, this was reported in several empirical studies (e.g., Anderson and Nehring, 1984;Novinger, 1987;Cornelius and Margenau, 1999;Newman and Hoff, 2000). However, other studies have found that total catch-and-release regulations or more stringent size or daily bag limits may result in reduced angler effort despite similar or increased catch rates (e.g., Muoneke, 1994;Almodóvar and Nicola, 1998;Boxrucker, 2002;Hurley and Jackson, 2002;Parker et al, 2007).…”