Life-history plasticity in amphidromous and catadromous fishes: a continuum of strategies

Augspurger, Jason M.; Warburton, Manna L.; Closs, Gerard P.

doi:10.1007/s11160-016-9463-9

Cited by 64 publications

(69 citation statements)

References 94 publications

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“…We did not find a clear immediate or latent effect of salinity on growth. This shows that larval growth can be achieved in a wide range of salinity, supporting the idea that the resource requirements of some amphidromous fishes can be fulfilled in freshwater and brackish environments as well if plankton resources are available (Augspurger, Warburton, & Closs, ). In temperate latitudes, according to the “food availability hypothesis” fish migrate to saline habitats to benefit from a more productive ecosystem (Gross et al, ) and feeding opportunities often explain migration in diadromous fishes (Chapman et al, ).…”

Section: Discussionsupporting

confidence: 68%

Carryover effects of larval environment on individual variation in a facultatively diadromous fish

Saboret¹,

Ingram

2019

Ecology and Evolution

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Intraspecific trait variation may result from “carryover effects” of variability of environments experienced at an earlier life stage. This phenomenon is particularly relevant in partially migrating populations composed of individuals with divergent early life histories. While many studies have addressed the causes of partial migration, few have investigated the consequences for between‐individual variability later in life. We studied carryover effects of larval environment in a facultatively diadromous New Zealand fish, Gobiomorphus cotidianus, along an estuarine salinity gradient. We investigated the implications of varying environmental conditions during this critical stage of ontogeny for adult phenotype. We inferred past environmental history of wild‐caught adult fish using otolith microchemistry (Sr/Ca) as a proxy for salinity. We tested for main and interactive effects of larval and adult environment on a suite of traits, including growth rates, behavior (exploration and activity), parasite load, and diet (stable isotopes and gut contents). We found a Sr/Ca consistent with a continuum from freshwater to brackish environments, and with different trajectories from juvenile to adult habitat. Fish with Sr/Ca indicating upstream migration were more vulnerable to trematode infection, suggesting a mismatch to freshwater habitat. Diet analysis suggested an interactive effect of larval and adult environments on trophic position and diet preference, while behavioral traits were unrelated to environment at any life stage. Growth rates did not seem to be affected by past environment. Overall, we show that early life environment can have multiple effects on adult performance and ecology, with the potential for lifetime fitness trade‐offs associated with life history. Our study highlights that even relatively minor variation in rearing conditions may be enough to generate individual variation in natural populations.

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Section: Discussionsupporting

confidence: 68%

Carryover effects of larval environment on individual variation in a facultatively diadromous fish

Saboret¹,

Ingram

2019

Ecology and Evolution

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“…Most of these model species are economically important and are classified as anadromous, a type of diadromy characterized by the return of mature or maturing individuals to their natal streams for reproduction. Studies focusing on a different type of diadromy, amphidromy where individuals migrate to the sea or streams during the larval stage, are rare (Augspurger, Warburton, & Closs, ). The present study focuses on an amphidromous organism from the Southern Hemisphere, G. maculatus .…”

Section: Introductionmentioning

confidence: 99%

The effects of diadromy and its loss on genomic divergence: The case of amphidromous Galaxias maculatus populations

et al. 2019

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Understanding the evolutionary mechanisms that affect the genetic divergence between diadromous and resident populations across heterogeneous environments is a challenging task. While diadromy may promote gene flow leading to a lack of genetic differentiation among populations, resident populations tend to be affected by local adaptation and/or plasticity. Studies on these effects on genomic divergence in nonmodel amphidromous species are scarce. Galaxias maculatus, one of the most widespread fish species in the Southern Hemisphere, exhibits two life histories, an ancestral diadromous, specifically, amphidromous form, and a derived freshwater resident form. We examined the genetic diversity and divergence among 20 estuarine and resident populations across the Chilean distribution of G. maculatus and assessed the extent to which selection is involved in the differentiation among resident populations. We obtained nearly 4,400 SNP markers using a RADcap approach for 224 individuals. As expected, collections from estuarine locations typically consist of diadromous individuals. Diadromous populations are highly differentiated from their resident counterparts by both neutral and putative adaptive markers. While diadromous populations exhibit high gene flow and lack site fidelity, resident populations appear to be the product of different colonization events with relatively low genetic diversity and varying levels of gene flow. In particular, the northernmost resident populations were clearly genetically distinct and reproductively isolated from each other suggesting local adaptation. Our study provides insights into the role of life history differences in the maintenance of genetic diversity and the importance of genetic divergence in species evolution.

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“…It is also possible that pressures like predation act as selective pressures on aspects of migration (e.g., periodicity, frequency) that influence fitness, which could precipitate the evolution of alternative (i.e., more favourable) life history strategies. It is not known, however, whether amphidromy is heritable, or if it is a plastic phenotype that facultatively fluctuates within and among populations (Augspurger, Wartburton, & Closs, 2017 Due to certain aspects of our study design, our findings likely represent conservative estimates of native Hawaiian migratory fish responses to land use and invasive species. For example, our surveys excluded some of the most intensively developed areas across the archipelago because snorkel surveys are ineffective and may be unsafe in excessively turbid or polluted waters (Hain et al, 2016;Thurow, Peterson, & Guzevich, 2006).…”

Section: Discussionmentioning

confidence: 91%

“…Elevated predation or other pressures might instead elicit shifts in life history (e.g., from non-migratory to migratory behaviour) that mitigate detrimental effects, particularly in facultative migrants like A. stamineus(Hogan et al, 2014). It is not known, however, whether amphidromy is heritable, or if it is a plastic phenotype that facultatively fluctuates within and among populations(Augspurger, Wartburton, & Closs, 2017). It is not known, however, whether amphidromy is heritable, or if it is a plastic phenotype that facultatively fluctuates within and among populations(Augspurger, Wartburton, & Closs, 2017).…”

mentioning

confidence: 99%

Migratory gauntlets on oceanic islands: Watershed disturbance increases the cost of amphidromy

Hain

Moody

Lamphere

et al. 2019

Ecology of Freshwater Fish

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Migratory fishes can be threatened by conditions encountered along dispersal pathways that impede access to feeding or breeding grounds. In this study, we tested the hypothesis that amphidromous fishes are equally or more sensitive to conditions along dispersal pathways than conditions in primary residential habitats. We did so by conducting distribution‐wide population surveys of all five amphidromous gobies native to the Hawaiian Islands to assess responses to in‐stream habitat, invasive species and watershed land use. We used Redundancy Analyses to assess whether goby densities varied according to local, downstream or upstream conditions. We found that population densities of the two non‐climbing species (Eleotris sandwicensis, Stenogobius hawaiiensis) varied according to local land use and local habitat conditions. Greater densities of E. sandwicensis also were found in watersheds with greater forest cover upstream of survey sites. Lower densities of two species that migrate farther inland (Awaous stamineus, Sicyopterus stimpsoni) were observed in watersheds with greater anthropogenic land use downstream or at the stream mouth. Population densities of E. sandwicensis and both Sicydiine species (Lentipes concolor, S. stimpsoni) also were lower when non‐native Poeciliids were locally present or present downstream in the watershed. These findings suggest that densities of native Hawaiian amphidromous fishes are equally or more sensitive to conditions along migratory pathways relative to conditions in primary residential habitats. Thus, alleviating pressures by removing invasive species and restoring habitat along dispersal pathways could be effective approaches to increasing densities of amphidromous species, especially those that migrate farther inland to higher elevations.

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Life-history plasticity in amphidromous and catadromous fishes: a continuum of strategies

Cited by 64 publications

References 94 publications

Carryover effects of larval environment on individual variation in a facultatively diadromous fish

Carryover effects of larval environment on individual variation in a facultatively diadromous fish

The effects of diadromy and its loss on genomic divergence: The case of amphidromous Galaxias maculatus populations

Migratory gauntlets on oceanic islands: Watershed disturbance increases the cost of amphidromy

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