An Evaluation of Angler Harvest of Walleye and Saugeye in a Kansas Reservoir

Quist, Michael C.; Stephen, James L.; Lynott, Sean T.; Goeckler, Jason M.; Schultz, Randall D.

doi:10.1080/02705060.2010.9664351

Cited by 13 publications

(13 citation statements)

References 26 publications

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“…Although the size structure is similar, the length range of female walleye has become wider and includes more individuals of shorter total length. The presence of smaller mature female walleye during the HSO regulation could be a response to higher exploitation of male and immature female walleye, leading to earlier maturation of females as was observed in a Kansas reservoir (Quist et al 2010). The increase in relative abundance of female walleye, along with a greater percentage of spawning female walleye being protected by the HSO than were traditionally seen under the MLL, would suggest that the HSO regulation has initially been successful at protecting female walleye.…”

Section: Discussionmentioning

confidence: 90%

“…In addition, walleye of shorter lengths and younger ages are reported as more vulnerable to angling (Serns and Kempinger 1981;Jacobson 1994;Myers et al 2014), which would suggest an increase in male harvest may have been responsible for the increase in total walleye harvest and the declining male abundance observed under the HSO. Exploitation of walleye has been reported as similar between males and females (Serns and Kempinger 1981;Jacobson 1994), but these studies were conducted on more northern waters that typically have lower exploitation rates than Great Plains reservoirs (Quist et al 2010). Similar male size structure with the MLL and HSO regulations is not surprising as a relationship between density and growth was not observed in Wisconsin (Sass et al 2004) or seen in age-4 males following the implementation of the regulation allowing harvest of one walleye greater than 356 mm (Fayram and Schmalz 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Walleye exploitation has been reported to vary between 3 and 55% . In populations on the southern edge of walleye distribution, higher levels of exploitation have been reported and sustained (Quist et al 2010;Schmalz et al 2011). Harvest of walleye has been reported to decrease relative abundance, production, and biomass, despite improvements in body condition and fecundity .…”

Section: Introductionmentioning

confidence: 99%

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Sex-specific Changes in Walleye Abundance, Size Structure and Harvest Following Implementation of Regulation to Protect Broodstock

Koupal

Katt

Schoenebeck

et al. 2015

Journal of Fish and Wildlife Management

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The popularity of walleye Sander vitreus fishing has resulted in the development of specialized regulations that are designed to protect these fisheries. In the case of Sherman Reservoir, Sherman County, Nebraska, the walleye population provides a sportfishing opportunity and serves as broodstock for the state. In 2009, for the primary purpose of protecting female broodstock, the regulation changed from a harvest limit of four walleye with 457-mm minimum length to allowing a reduced harvest limit of two walleye within a harvest slot (381–508 mm) and one walleye more than 711 mm. This study examined existing data sets to assess the percentage of spawning walleye protected with each regulation, sex-specific differences in relative abundance and size structure during broodstock collection and angler effort, total catch, and harvest of walleye. The new regulation has increased protection of female walleye by more than 90%, but decreased protection of male walleye by more than 60%. The relative abundance of female walleye caught per net during broodstock collection has more than doubled since the regulation was changed, but the size structure of female walleye collected during broodstock operations was similar. Correspondingly, the relative abundance of male walleye has declined since changing the regulation, but size structure remained similar. Effort and total catch of walleye by anglers were similar before and after the regulation was enacted, but harvest has increased by 130%. This regulation appears to protect female broodstock walleye, but it makes male walleye more vulnerable to angler harvest.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sex-specific Changes in Walleye Abundance, Size Structure and Harvest Following Implementation of Regulation to Protect Broodstock

Koupal

Katt

Schoenebeck

et al. 2015

Journal of Fish and Wildlife Management

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“…;Mosher 2001;Boxrucker 2002;Galinat et al 2002). Concern has been raised regarding diploid saugeye stockings in Kansas because of potential impacts to the genetic integrity of percid populations (Fields and Phillip 2000;Quist et al 2010;Koch 2016). Specific concerns include the introgression of alleles into genetically pure wild broodstock (e.g., Walleye and Sauger) in Kansas reservoirs, reduced fitness of potential backcrosses, and emigration and reproduction of fertile saugeyes in Kansas streams that may contain species of conservation concern (e.g., Neosho Madtom Noturus placidus, Topeka Shiner Notropis topeka, Arkansas Darter Etheostoma cragini, and Peppered Chub Macrhybopsis tetranema).…”

mentioning

confidence: 99%

Comparison of Diploid and Triploid Saugeye Recruitment, Growth, and Condition in Kansas Impoundments

Koch

Steffen

Goeckler

et al. 2018

N American J Fish Manag

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Saugeyes (Walleye Sander vitreus × Sauger S. canadensis) are stocked by natural resource agencies to provide angling opportunities and biological control of abundant small‐bodied fishes. Concern has been raised regarding the stocking of fertile diploid saugeyes in Kansas waters due to potential genetic introgression into wild parental stocks and unintended natural reproduction in ecologically sensitive systems. As such, triploid saugeyes have been stocked in Kansas since 2006 but with minimal evaluation. We compared relative recruitment, growth, and condition of diploid and triploid saugeyes after stocking equal numbers of 3–6‐d‐old diploid and triploid saugeye fry in four Kansas reservoirs for 3 years. Saugeyes were sampled from study reservoirs annually (2014–2016) with autumn night electrofishing, and flow cytometry was used to determine the ploidy of sampled fish. Throughout the study, diploid fish composed approximately 80% of sampled saugeyes. Age‐0 year‐classes consisted of 67–100% diploid fish, depending on the study reservoir and sampling year. As saugeyes reached ages 1 and 2, similar patterns in relative recruitment were indicated, with diploids outnumbering triploids by approximately four times. At individual study impoundments, diploid saugeyes composed 75–87% of fish from all study year‐classes. Mean length of diploid saugeyes was generally greater than that of triploids at age 0, whereas mean lengths at ages 1 and 2 were similar for the two groups. Our results indicate that diploid saugeye fry represent a more efficient stocking option than triploid fry and that managers should carefully balance consideration of the relative recruitment of diploid and triploid saugeyes with potential genetic integration between Sander spp. when conducting supplemental stockings.

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“…; Quist et al. ). Walleye × Sauger hybrids also naturally occur in systems with sympatric populations of parental species (e.g., Graeb et al.…”

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confidence: 98%

Precision of Three Structures for Saugeye Age Estimation

Koch

Neely

Sowards

2018

N American J Fish Manag

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We evaluated the precision of age estimates obtained from sagittal otoliths, scales, and dorsal fin spines from 341 saugeyes (Walleye Sander vitreus × Sauger S. canadensis) collected from six Kansas reservoirs. Between-reader agreement was greatest for otoliths, followed by dorsal spines and then scales. Coefficient of variation (CV) values for between-reader comparisons were 1.3-3.1% for otoliths and 13.8-18.2% for dorsal spines. Betweenreader comparisons for scales were the most variable, with CV estimates between 19.9% and 23.1%. Age estimates from otoliths aligned with age estimates from scales more often than with estimates from dorsal spines, although age estimate comparisons between structures were generally variable. Between-reader agreement for scales and dorsal spines decreased with increasing estimated age; however, agreement for otoliths generally remained high (i.e., >80%) through age 10. Given greater precision relative to other structures, we recommend the use of sectioned otoliths to estimate ages of saugeyes, especially when sacrificing the fish is not a concern. RESULTSSectioned otoliths, scales, and sectioned dorsal spines were collected from 341 saugeyes varying in TL from 130 to 670 mm (Figure 1). Between-reader agreement was generally greatest for otoliths, followed by dorsal spines and scales (Figure 2). Agreement between readers varied from 96.2% to 98.0% for otoliths, and CVs for reader combinations were between 1.3% and 3.1%. No bias between readers was detected for otoliths for any age estimate combination. Agreement between readers for scale age estimates varied from 64.1% to 68.8%, and CV values ranged from 19.9% to 23.1%. Significant deviations in scale age estimates between readers occurred at young 32 KOCH ET AL.

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An Evaluation of Angler Harvest of Walleye and Saugeye in a Kansas Reservoir

Cited by 13 publications

References 26 publications

Sex-specific Changes in Walleye Abundance, Size Structure and Harvest Following Implementation of Regulation to Protect Broodstock

Sex-specific Changes in Walleye Abundance, Size Structure and Harvest Following Implementation of Regulation to Protect Broodstock

Comparison of Diploid and Triploid Saugeye Recruitment, Growth, and Condition in Kansas Impoundments

Precision of Three Structures for Saugeye Age Estimation

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