Coexistence of Anadromous and Resident Life History Styles of Pond Smelt, Hypomesus nipponensis, in Lake Ogawara, Japan, as determined by Analyses of Otolith Structure and Strontium:Calcium Ratios

Katayama, Satoshi; Radtke, Richard L.; Omori, Michio; Shafer, David J.

doi:10.1023/a:1007682729460

Cited by 26 publications

(3 citation statements)

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“…As the data did not follow a normal distribution, Wilcoxon tests followed by Bonferroni correction were performed to compare the median between control and treatment tanks and between estuary and lake collection. Wilcoxon tests and boxplots were conducted with the rstatix (Kassambara, 2020b) and ggbur (Kassambara, 2020a) packages. Survival differences between control and treatment were assessed using the Kaplan-Meier method, a nonparametric statistic to estimate survival function.…”

Section: Discussionmentioning

confidence: 99%

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Genomic basis of the loss of diadromy in Galaxias maculatus: Insights from reciprocal transplant experiments

et al. 2020

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Diadromy is known for having major effects on the distribution and richness of aquatic species, and so does its loss. The loss of diadromy has led to the diversification of many species, yet research focusing on understanding its molecular basis and consequences are limited. This is particularly true for amphidromous species despite being the most abundant group of diadromous species. Galaxias maculatus, an amphidromous species and one of the most widely distributed fishes in the Southern Hemisphere, exhibits many instances of nonmigratory or resident populations. The existence of naturally replicated resident populations in Patagonia can serve as an ideal system for the study of the mechanisms that lead to the loss of the diadromy and its ecological and evolutionary consequences. Here, we studied two adjacent river systems in which resident populations are genetically differentiated yet derived from the same diadromous population. By combining a reciprocal transplant experiment with genomic data, we showed that the two resident populations followed different evolutionary pathways by exhibiting a differential response in their capacity to survive in salt water. While one resident population was able to survive salt water, the other was not. Genomic analyses provided insights into the genes that distinguished (a) migratory from nonmigratory populations; (b) populations that can vs those that cannot survive a saltwater environment; and (c) between these resident populations. This study demonstrates that the loss of diadromy can be achieved by different pathways and that environmental (selection) and random (genetic drift) forces shape this dynamic evolutionary process.

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Section: Discussionmentioning

confidence: 99%

“…including Arctic Charr in Canada (Salisbury et al, 2018(Salisbury et al, , 2020 and Pond Smelt (Hypomesus nipponensis) in Japan (Katayama et al, 2000), resident individuals are smaller in size than migratory individuals.…”

Section: Lipid Biosynthesis and Fatty Acid Metabolic Processesmentioning

confidence: 99%

Genomic basis of the loss of diadromy in Galaxias maculatus: Insights from reciprocal transplant experiments

et al. 2020

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“…However, otolith analyses of Delta Smelt suggest that some portion of the population may spawn in or near brackish water (Bush 2017;Hobbs et al 2019). Both Wakasagi and Delta Smelt consume similar prey composed primarily of pelagic zooplankton (Yamanaka and Kuwabara 2000;Slater and Baxter 2014;Mahardja et al 2019) and exhibit similar life-history strategies (Katayama et al 2000, Katayama 2001Moyle et al 2016;Hobbs et al 2019). Physiologically, a laboratory study demonstrated that Wakasagi have relatively higher tolerances of temperature and salinity than Delta Smelt (Swanson et al 2000), suggesting Wakasagi could be pervasive throughout the estuary, but the extent of their distribution and abundance is uncertain.…”

Section: Introductionmentioning

confidence: 99%

Wakasagi in the San Francisco Bay Delta Watershed: Comparative Trends in Distribution and Life-History Traits with Native Delta Smelt

Davis¹,

Adams²,

Lewis³

et al. 2022

SFEWS

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Intentional introductions of non-native fishes can severely affect native communities. Wakasagi (Hypomesus nipponensis, referred to as Japanese Pond Smelt) are native to Japan and were once separated from their non-native congener the endangered Delta Smelt (Hypomesus transpacificus) of the San Francisco Estuary (hereon “estuary”) of California. Wakasagi were introduced into California reservoirs in the 20th century as forage fish. Wakasagi have since expanded their distribution downstream to the estuary, but less is known about Wakasagi’s current distribution status, biology in the estuary, and negative influences on Delta Smelt. In this study, we took a comparative approach by synthesizing long-term field monitoring surveys, modeling environmental associations, and quantifying phenology, growth, and diets of Wakasagi and Delta Smelt to describe abundance and range, trends of co-occurrence, and shared ecological roles between smelt species. We found Wakasagi in greatest abundance in the upper watershed below source reservoirs, and in the northern regions of the estuary with the most co-occurrence with Delta Smelt; however, their range extends to western regions of the estuary, and we found evidence of an established population that annually spawns and rears in the estuary. We found these smelt species have similar ecological roles demonstrated by overlaps in habitat use (e.g., an association with higher turbidities and higher outflow), phenology, growth, and diets. Despite similarities, earlier hatching and rearing of Wakasagi during cooler months and reduced growth during warmer drought years suggest this species is unlike typical non-natives (e.g., Centrarchids), and they exhibit a similar sensitivity to environmental variability as Delta Smelt. This sensitivity may be why Wakasagi abundance remains relatively low in the estuary.

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Migration of Freshwater Fishes

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Coexistence of Anadromous and Resident Life History Styles of Pond Smelt, Hypomesus nipponensis, in Lake Ogawara, Japan, as determined by Analyses of Otolith Structure and Strontium:Calcium Ratios

Cited by 26 publications

References 34 publications

Genomic basis of the loss of diadromy in Galaxias maculatus: Insights from reciprocal transplant experiments

Genomic basis of the loss of diadromy in Galaxias maculatus: Insights from reciprocal transplant experiments

Wakasagi in the San Francisco Bay Delta Watershed: Comparative Trends in Distribution and Life-History Traits with Native Delta Smelt

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