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IssueNorth American Journal of Fisheries Management: Volume 44, Issue 5
913-1164October 2024
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Issue Information
FEATURE ARTICLE
Exploitation and catch and release of salmonids in Idaho high mountain lakes
- Pages: 915-924
- First Published: 11 October 2024
Impact Statement
Based on angler reporting of tagged fish, the annual exploitation of salmonids in Idaho high mountain lakes was 5.8% and the catch-and-release rate was 8.5%. Less hiking distance, a less uniform shoreline, and larger fish size improved the likelihood that tagged fish would be caught by anglers.
MANAGEMENT BRIEF
Don't count your eggs before they resorb: Early collection of ovarian follicles influences estimates of Lake Trout fecundity in Yellowstone Lake
- Pages: 925-931
- First Published: 11 July 2024
Impact statement
Female Lake Trout undergo fecundity reduction through follicular atresia, reducing the number of ovarian follicles that may be spawned, which suggests that fecundity estimates based on fish that are sampled too early in the reproductive cycle will be inaccurate.
ARTICLE
Performance and cost advantage of stocking locally sourced Walleye fry into southern Minnesota lakes
- Pages: 932-946
- First Published: 23 August 2024
Impact statement
We show that a local Walleye strain can outperform nonlocal strains at a level that can overcome additional costs of developing a new egg source. In addition, higher natural reproduction of the local strain may reduce or eliminate the need for future stocking.
Adapting standardized trout monitoring to a changing climate for the upper Yellowstone River, Montana, USA
- Pages: 947-961
- First Published: 23 August 2024
Impact Statement
Climate change is causing conditions that prevent mark–recapture trout monitoring in the Yellowstone River. Two alternative analysis methods, N-mixture models and mean catchability, showed limited utility; thus, other alternate sampling and analytical methods could be explored.
Evaluation of visible implant elastomer (VIE) tags for use in supplementation of an endangered estuarine fish
- Pages: 962-972
- First Published: 23 August 2024
Impact Statement
Supplementation of Delta Smelt is needed to avert its extinction in the wild. We experimentally evaluated the suitability of visible implant elastomer tags to distinguish hatchery- and wild-origin Delta Smelt captured in monitoring surveys during the spawning season.
Processing time and precision of aging structures for Bighead Carp and Silver Carp in the lower Red River catchment in the southern Great Plains
- Pages: 973-986
- First Published: 05 September 2024
Impact Statement
We showed that among the five structures compared for age estimation in Bighead and Silver carp, the lapillus otolith had the highest between-reader agreement and is an efficient structure to use when estimating age for these species. Use of lapillus otoliths will improve the comparability of population demographics, but accuracy still needs to be assessed.
Cold blood in warming waters: Effects of air temperature, precipitation, and groundwater on Gulf Sturgeon thermal habitats in a changing climate
- Pages: 987-1007
- First Published: 23 August 2024
Impact Statement
Water temperature models with precipitation and groundwater are accurate and useful, allowing managers to locate key thermal habitats, forecast temperatures, and decide when and where to safely target, capture, tag, and monitor Gulf Sturgeon and other species amid climate change.
Assessing factors related to Walleye stocking success in the Midwestern United States
- Pages: 1008-1024
- First Published: 15 September 2024
Impact statement
Understanding factors influencing stocking success may help to inform the management and stocking allocation of Walleye in response to climate-related changes in lake temperatures and fish communities.
Detecting bias in abundance estimates of spawning fish from closed-capture models using remote and physical capture data
- Pages: 1025-1040
- First Published: 22 September 2024
Impact statement
Estimates of population abundance can be biased low when remote detections of marked (e.g., PIT-tagged) fish and physical capture data are used in closed-capture population models because not all fish are available for physical capture. Estimating population abundance of marked fish divided by the proportion of marked fish is a method for identifying and correcting this bias.
Differential relative catchability of wild- and hatchery-origin steelhead in the Deschutes River, Oregon
- Pages: 1041-1061
- First Published: 28 October 2024
Impact statement
Understanding catch of wild and hatchery steelhead is important for balancing sport angling and conservation. Wild summer steelhead in the Deschutes River, Oregon, were more frequently caught than hatchery steelhead and disproportionately supported angler success. In addition to species conservation, maintaining wild steelhead abundance is critical to angler success in the Deschutes River steelhead fishery.
MANAGEMENT BRIEF
A genetic assessment of natural barriers for isolating a proposed Greenback Cutthroat Trout reintroduction area
- Pages: 1062-1072
- First Published: 25 October 2024
Impact statement
Genetic analyses suggested that a series of natural waterfalls do not act as sufficient barriers for isolating a proposed Greenback Cutthroat Trout reintroduction area in Colorado, USA. Barrier modification or construction would be necessary to prevent invasion by nonnative salmonids.
Dorsal fin height is not an effective tool to distinguish hatchery and wild steelhead in the field
- Pages: 1073-1080
- First Published: 27 October 2024
Impact Statement
Our study revealed that the dorsal fin height harvest control rule is inaccurate at distinguishing hatchery and wild steelhead, presenting a potentially high conservation risk and supporting the use of the highly accurate and low-cost adipose-fin-clipping method.
Assessing the utility of computer vision for age determination of Gulf Menhaden
- Pages: 1081-1091
- First Published: 26 October 2024
Impact statement
Computer vision techniques have been widely employed for image analysis but remain novel for fish age determination in a management context. In this work, we show that the approach has promise and document some of the hurdles that must be overcome prior to widespread use.
REVIEW
Length in assessing status of freshwater fish populations: A review
- Pages: 1092-1110
- First Published: 10 November 2024
Impact Statement
This paper reviews methods, indices, and criteria suited for monitoring the status of fish populations in inland systems based on body length data. Building population assessment strategy around length can be cost-effective with only minimal data requirements.
MANAGEMENT BRIEF
Handling effects on dispersal of PIT-tagged Flannelmouth Sucker
- Pages: 1111-1120
- First Published: 26 October 2024
Impact statement
How field methods affect fish may alter interpretation and limit inference of research studies. We demonstrate that tagging and handling did not change residence time of spawning Flannelmouth Sucker and consider why posthandling flight was identified in another tributary system.
ARTICLE
The spatial and seasonal patterns and stability of the Lake Whitefish fishery in Michigan waters of southern Lake Huron
- Pages: 1121-1133
- First Published: 28 October 2024
Impact statement
This study and its findings have direct implication for current management of the Lake Whitefish fisheries.
Assessing Blue Catfish population dynamics across varying introduction timelines in Georgia
- Pages: 1134-1146
- First Published: 27 October 2024
Impact Statement
This analysis of introduced Blue Catfish populations in multiple rivers in Georgia will help to understand how dynamic rate functions vary over spatiotemporal scales and across varying introduction timelines. These data are critical for future management and improving our understanding of invasive species ecology.
Influence of stream temperature and human disturbance on prespawn mortality of Chinook Salmon in the Willamette River basin
- Pages: 1147-1164
- First Published: 25 October 2024
Impact Statement
Although trap and haul operations allow wild salmon populations to access historical spawning grounds, despite impoundment structures, populations are hindered by high prespawn mortality rates and recovery efforts may benefit from an adaptive management plan.