Survival of Apache Trout Eggs and Alevins under Static and Fluctuating Temperature Regimes

Recsetar, Matthew S.; Bonar, Scott A.

doi:10.1080/00028487.2012.741551

Cited by 12 publications

(8 citation statements)

References 33 publications

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“…Morán et al found that brown trout (Salmo trutta) families with high embryo mortality tended to produce female-biased clutches of alevin 38 . With lower streamflow and higher water temperatures likely to have increased embryo mortality in Mahogany Creek from 2012-2016, adult recruitment may have been skewed toward females via this mechanism of skewed embryo survival 39,40 .…”

Section: Discussionmentioning

confidence: 99%

Population dynamics of threatened Lahontan cutthroat trout in Summit Lake, Nevada

Simmons¹,

Campbell²,

Jerde³

et al. 2020

Sci Rep

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Summit Lake, nevada (USA) is the last high-desert terminal lake to have a native self-sustaining population of threatened Lahontan cutthroat trout (Oncorhynchus clarkii henshawi). from spring 2015 to fall 2017, we quantified adult abundance and survival and the total annual spawning run. Abundance and survival were estimated with mark-recapture using pit tags, and the annual spawning run was estimated with PIT tag detections and counts of spawners. Adult abundance fluctuated from 830 (95% CI 559-1248) to 1085 (95% CI 747-1614), with no overall temporal trend, as a decrease in male abundance was generally offset by an equal increase in female abundance. Estimated mean adult survival was 0.51 (95% CI 0.44-0.58). The spawning run increased from 645 (2015) to 868 (2016), but then decreased slightly to 824 (2017, mean = 789 ± 118). Female spawners increased in 2016 but decreased slightly in 2017, whereas male spawners decreased each year. In addition, the proportion of adults that spawned each year increased overall. our study suggests that the adult population remained stable although most of the study period included the recent, severe regional drought in the western United States (2012-2016). Amid the backdrop of global biodiversity decline, North American freshwater fauna is declining five times faster than terrestrial fauna, including current extinction rates of freshwater fish 877 times greater than background rates 1-3. Since the mid-1800s, habitat loss, overfishing and invasive species have severely altered western United States (US) freshwater fish communities 4. Today climate change predictions for the large expanse of mountain ranges in the western US (increased climatic variability that will increase drought frequency, duration, and severity, and shift precipitation to more rain and less snow) threaten to compound the above disturbances 5-8. These legacy, current and future disturbances combine into a formidable challenge for conserving western US freshwater fish biodiversity, often necessitating active management of fisheries that are susceptible to further decline and localized extinctions 9. Cutthroat trout (Oncorhynchus clarkii spp.) are salmonids native to the coastal and inland waters of western North America 10. Consisting originally of approximately 14 subspecies, the historic distribution of cutthroat species ranged from Alaska to southern Texas and the Pacific coast to the Rocky Mountains 10,11. Distribution and abundance of many subspecies have declined over the past century. Two subspecies are extinct and three subspecies are on the US endangered species list 10,12. Cutthroat trout population dynamics research has been concentrated in the rivers and streams of the Rocky Mountains, the eastern side of the Intermountain Region (area between the Sierra Nevada/Cascade Mountains and the Rocky Mountains), and the Sierra Nevada Mountains 13-24. Little is known about the population dynamics of cutthroat trout in lakes across the western US, especially the desert terminal mountain lakes of the Great Bas...

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Section: Discussionmentioning

confidence: 99%

Population dynamics of threatened Lahontan cutthroat trout in Summit Lake, Nevada

Simmons¹,

Campbell²,

Jerde³

et al. 2020

Sci Rep

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show abstract

“…Researchers and managers should avoid assuming that relationships between the biology of fish (and other organisms) and climate are static across disparate types of environments. There is increased emphasis on the relationships between climate and fisheries (Kaeding 2012;Michaletz and Siepker 2013;Recsetar and Bonar 2013); however, if such relationships are water body-specific yet used to develop region-wide management activities, the results could be undesirable (McDermid et al 2013). Ideally, natural resource management agencies would develop ecosystem-specific or "classed" approaches to data collection and management initiatives; however, in many water-rich areas standardization remains a major challenge (Wehrly et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Water Body Type Influences Climate–Growth Relationships of Freshwater Drum

Richard

Rypel

2013

Trans Am Fish Soc

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Climate-growth relationships of fish are of increasing research interest. However, few studies have attempted to characterize the extent to which climate-growth relationships may diverge across fundamentally different types of environments. The goal of this study was to examine the effects of climate variability (i.e., temperature, precipitation, global climate indices) on the growth of Freshwater Drum Aplodinotus grunniens and determine the extent to which these relationships differ between lotic and lentic habitats. Freshwater Drum were collected from five river and five reservoir environments in Georgia, Alabama, and Mississippi. Tree-ring techniques were used to standardize annual growth for age (measured using interannual growth increments from otolith sagittae) and growth indices were correlated to annual thermal, hydrologic, and global climate indices. Freshwater Drum expressed distinct and significant climate-growth relationships by water body type. The general pattern observed was that annual drum growth in rivers was significantly correlated to days of year of maximum flow while annual drum growth in reservoirs was significantly correlated to annual variation in number of growing degree-days (GDD). Furthermore, the strength of growth-GDD correlations for drum increased predictably alongside hydraulic retention time of reservoirs. This study reveals that water body type can govern climate-growth relationships in fish and suggests biologists need to be wary of assuming that patterns documented in one population would be wholly applicable to another.

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“…Treatments were initiated in a 36-tank recirculating system described by Widmer et al (2006) and Recsetar and Bonar (2013). Each tank was equipped with an air stone, a biological sponge filter, and equal amounts of cracked clay pots to provide cover for the crayfish.…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of Two Commercial Rotenone Formulations in the Eradication of Virile Crayfish Orconectes virilis

Recsetar

Bonar

2015

N American J Fish Manag

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The virile or northern crayfish Orconectes virilis is an invasive species throughout much of the USA, damaging aquatic communities where it is introduced. Therefore, identification of effective methods for its eradication from areas in which it is unwanted is important. We studied the effectiveness of two commercial formulations of rotenone, Chem Fish Regular and CFT Legumine, for virile crayfish control. Although both formulations were effective for fish eradication, earlier observations by fisheries managers suggested that the relative effectiveness of the two formulations differs for crayfish. The only noteworthy difference between the formulations is that the former contains a synergist. In our first experiment, we tested each toxicant at the maximum labeled dosage (5 ppm) and found CFT Legumine to be 100% ineffective (0% mortality), while the Chem Fish Regular treatment resulted in 12.5% mortality. After we deemed Chem Fish Regular to be the only toxicant with any effectiveness against virile crayfish, we tested concentrations from 5 to 50 ppm and found 10 times the maximum labeled dosage (50 ppm rotenone) was needed to kill all virile crayfish. Because crayfish burrow and can leave water, and because 100% eradication is usually desired, rotenone applied at the labeled rates will not be effective for crayfish control. However, treating a body of water with CFT Legumine to eradicate invasive fish while leaving desirable crayfish unharmed is possible.

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Survival of Apache Trout Eggs and Alevins under Static and Fluctuating Temperature Regimes

Cited by 12 publications

References 33 publications

Population dynamics of threatened Lahontan cutthroat trout in Summit Lake, Nevada

Population dynamics of threatened Lahontan cutthroat trout in Summit Lake, Nevada

Water Body Type Influences Climate–Growth Relationships of Freshwater Drum

Effectiveness of Two Commercial Rotenone Formulations in the Eradication of Virile Crayfish Orconectes virilis

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