The use of angler diary surveys to evaluate long-term changes in muskellunge populations on Lake of the Woods, Ontario

Mosindy, Thomas E.; Duffy, Mark

doi:10.1007/978-1-4020-6049-6_8

Cited by 10 publications

(14 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Data that are derived from individual angling logbooks should be interpreted with caution. This data set was based on citizen science: note that anglers may overestimate or underestimate sizes of harvested fish, incorrectly identify fish species, and disobey fishing rules (Bray & Schramm, 2001; Cooke, Dunlop, McLennan, & Power, 2000; Essig & Holliday, 1991; Mosindy & Duffy, 2007; Pollock, Jones, & Brown, 1994). Studied salmonids have similar body anatomy and physiology (especially trout species); anglers likely misinterpreted a few brown trout for rainbow trout and vice versa.…”

Section: Discussionmentioning

confidence: 99%

The effects of fisheries management on harvest rates of native and non‐native salmonid fish species

Lyach

2020

J Appl Ichthyol

View full text Add to dashboard Cite

In central Europe, both brown trout Salmo trutta and European grayling Thymallus thymallus are threatened native salmonid species with high value in recreational angling and nature conservation. On the other hand, rainbow trout Oncorhynchus mykiss and brook trout Salvelinus fontinalis are intensively stocked non‐native species of high angling value but no value for nature conservation. This study tested if harvest rates of native salmonids are negatively correlated to intensive stocking and harvest rates of non‐native salmonids in inland freshwater recreational fisheries. Data were collected from 250 fishing sites (river and stream stretches) over 13 years using mandatory angling logbooks. Logbooks were collected from individual anglers by the Czech Fishing Union in the regions of Prague and Central Bohemia, Czechia (central Europe) and processed by the author of this study. In result, anglers harvested 200,000 salmonids with total weight of 80 tons over 13 years. Intensive stocking of multiple salmonid species lead to slightly lower harvests of native salmonids. Inversely, intensive harvests of multiple salmonid species lead to slightly higher harvest of native salmonids. Recapture rates of stocked salmonids were relatively low (0.6%–3.7%), proving fish stocking moderately ineffective. Since the effects of non‐native salmonid stocking and harvest rates on native salmonid harvest were significant but not strong, it is suggested that rivers and streams that support fishing for non‐native salmonids still support fishing for native salmonids. However, this idea does not apply for fishing sites with really high intensity of non‐native salmonid stocking – harvest rates of natives were very low on these fishing sites.

show abstract

Section: Discussionmentioning

confidence: 99%

The effects of fisheries management on harvest rates of native and non‐native salmonid fish species

Lyach

2020

J Appl Ichthyol

View full text Add to dashboard Cite

show abstract

“… for examples), many studies have successfully used angler reported logbook data in monitoring fisheries (e.g., Sztramko et al. ; Kerr ; MacLennan ; Mosindy and Duffy ). Additionally, angler logbooks eliminate many of the potential biases of other survey methods (e.g., mail surveys, Tarrant et al.…”

Section: Discussionmentioning

confidence: 99%

Using Limited Data to Identify Optimal Bag and Size Limits to Prevent Overfishing

Moreau

Matthias

2018

N American J Fish Manag

View full text Add to dashboard Cite

Bag and size limits are commonly used in recreational fisheries management, but these regulations are often treated as separate management tools. This effectively overlooks how bag and size limits can be simultaneously used to achieve multiple management outcomes (e.g., reduce exploitation, prevent overfishing, maximize angler acceptance, etc.). Our objectives were to combine data‐limited stock assessment methods with an angler catch simulation and a yield‐per‐recruit model to assess the effectiveness of bag and size limits to decrease exploitation rates and improve the spawning potential ratio (SPR). We then applied these methods to the Kipawa Lake Walleye Sander vitreus fishery that has experienced overfishing and poor fishing quality. Using data‐limited assessment methods, the exploitation rate was estimated at 0.45 (95% CI = 0.32–0.59) and the population was overfished (mean SPR = 0.06; 95% CI = 0.02–0.13). Bag limits significantly reduced total harvest when extremely restrictive (i.e., reduced to one fish per angler from the current limit of six), but changes in bag limits alone were not sufficient to prevent overharvest because SPR remained below 0.35. Size limits could be used to prevent overharvest with narrow harvest slots (up to a 14‐cm slot range with a minimum harvestable size greater than 32 cm) or large minimum size limits (>52 cm) at the current bag limit of six. When bag limits were reduced to one or two fish per day, harvest windows could be 3–13 cm larger and minimum length limits could be 3–12 cm lower to prevent overharvest. This analysis outlines a relatively simple and effective method that can be applied using data commonly collected in annual agency surveys to predict which regulatory combinations can be used to prevent overharvest, reduce exploitation rates, and maximize angler satisfaction and acceptance of regulations. Finally, the data and model code are included in the Supplement and can be easily applied to other data limited fisheries.

show abstract

“…Angler‐reported data have been used to evaluate the characteristics of Muskellunge populations (Mosindy and Duffy ); however, angling size selectivity needs to be carefully evaluated on a water body–specific basis if these data are to be integrated into traditional Muskellunge assessments. In this study, the lengths of fish caught by anglers at one site were reflective of the modeled adult population length distribution.…”

Section: Discussionmentioning

confidence: 99%

Recapture Rates and Size Selectivity of Muskellunge by Anglers Within Two Minnesota Fisheries

Bahr

Carlson

Baird

et al. 2018

N American J Fish Manag

View full text Add to dashboard Cite

Increases in catch-and-release practices in addition to angler engagement in management activities to evaluate and improve the trophy potential of Muskellunge Esox masquinongy fisheries have become prevalent in recent decades. An expectation of conservative angling practices and regulations is that released fish can be recaptured by anglers at a later time and potentially at a larger size.Although several studies have evaluated Muskellunge recapture rates, no studies have estimated the number of recaptured Muskellunge relative to the number present in the population. Additionally, few studies have evaluated angling size selectivity and the potential benefits or biases of incorporating those data into traditional Muskellunge assessments. This study evaluated the proportion of Muskellunge that were caught and recaptured relative to the population estimates in two Minnesota water bodies and the potential length-related bias from angler-caught fish. Data were obtained from traditional sampling gears (i.e., trap netting, boat electrofishing) and angling by volunteer anglers in the Mississippi and Crow Wing rivers and Baby and Man lakes. Participating anglers captured 11-22% of the population, of which 1-3% were subsequently recaptured at both sites annually. Recaptured fish accounted for 5-16% of the annual catch. At the Mississippi River site, proportionally larger fish were angled compared with the modeled population size structure, whereas angler catch from Baby and Man lakes was similar to the modeled size structure, likely due to the differing techniques used by anglers in the two water bodies. A more thorough understanding of recapture rates and size selectivity may be particularly important when managing a lowdensity species as angling pressure and angler involvement in management activities increase.

show abstract

The use of angler diary surveys to evaluate long-term changes in muskellunge populations on Lake of the Woods, Ontario

Cited by 10 publications

References 6 publications

The effects of fisheries management on harvest rates of native and non‐native salmonid fish species

The effects of fisheries management on harvest rates of native and non‐native salmonid fish species

Using Limited Data to Identify Optimal Bag and Size Limits to Prevent Overfishing

Recapture Rates and Size Selectivity of Muskellunge by Anglers Within Two Minnesota Fisheries

Contact Info

Product

Resources

About