Thermoadaptation Characteristics of European River Lamprey Lampetra fluviatilis Smolts

Golovanov, V. K.; Nekrutov, Nikita; Zvezdin, A. O.; Smirnov, A. K.; Tsimbalov, I. A.

doi:10.1134/s0032945219040052

Cited by 6 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Adaptive variation could also be an explanation for the subtle neutral-loci population structure through selection for phenotypes (e.g., total length and weight) that are more fit for environments with certain temperature, flow, and lunar conditions, as distributional differences of Northern Hemisphere species and G. australis have been observed associated with variation in these environmental parameters ( Macey and Potter 1978 ; Sloane 1984 ; Moser et al 2015 ; Potter et al 2015 ; Golovanov et al 2019 ; Arakawa and Yanai 2021 ; Miller et al 2021 ). Our outlier analyses recovered 12 potential adaptive SNPs and suggested that 5 genes, involved in multiple cell functions, may be contributing to the subtle structure of the neutral loci.…”

Section: Discussionmentioning

confidence: 99%

Population Genomics of New Zealand Pouched Lamprey (kanakana; piharau;Geotria australis)

Miller

Timoshevskaya

Smith

et al. 2022

Journal of Heredity

View full text Add to dashboard Cite

Pouched lamprey (Geotria australis) or kanakana/piharau is a culturally and ecologically significant jawless fish that is distributed throughout Aotearoa New Zealand. Despite its importance, much remains unknown about historical relationships and gene flow between populations of this enigmatic species within New Zealand. To help inform management, we assembled a draft Geotria australis genome and completed the first comprehensive population genomics analysis of pouched lamprey within New Zealand using targeted gene sequencing (Cyt-b and COI) and restriction site-associated DNA sequencing (RADSeq) methods. Employing 16,000 genome-wide single nucleotide polymorphisms (SNPs) derived from RADSeq (n=186) and sequence data from Cyt-b (766 bp, n=94) and COI (589 bp, n=20), we reveal low levels of structure across 10 sampling locations spanning the species range within New Zealand. F-statistics, outlier analyses, and STRUCTURE suggest a single panmictic population, and Mantel and EEMS tests reveal no significant isolation by distance. This implies either ongoing gene flow among populations or recent shared ancestry among New Zealand pouched lamprey. We can now use the information gained from these genetic tools to assist managers with monitoring effective population size, managing potential diseases, and conservation measures such as artificial propagation programs. We further demonstrate the general utility of these genetic tools for acquiring information about elusive species.

show abstract

Section: Discussionmentioning

confidence: 99%

Population Genomics of New Zealand Pouched Lamprey (kanakana; piharau;Geotria australis)

Miller

Timoshevskaya

Smith

et al. 2022

Journal of Heredity

View full text Add to dashboard Cite

show abstract

“…Whether lampreys use thermal refuge is poorly understood. Physiological studies suggest an upper thermal limit of 30°C and an optimum of 15°C (Golovanov et al, 2019; Sankovich & Whitesel, 2019; Whitesel & Uh, 2022) (lethal temperature were only confirmed with ammocoetes), though ontogenetic and population‐level variations add uncertainty. Adult lampreys have been found in UKL in summer, during which temperatures can exceed 25°C (D. Markle and S. Colvin, personal communication).…”

Section: Introductionmentioning

confidence: 99%

Thermal refuge use and parasitism: Spatiotemporal variation in anchor worm and lamprey wounds on Klamath redband trout

Ortega,

Hahlbeck,

Derrickson

et al. 2023

Ecosphere

View full text Add to dashboard Cite

Climate warming is increasing maximum temperatures during summer such that they more frequently exceed the thermal tolerances of ectotherms, particularly cold‐water fishes. One way that species can avoid thermal stress is by moving to thermal refuge habitats. Thermal refuges remain suitably cool during summer and are often complementary to foraging, spawning, and rearing habitats. Although the benefits associated with the thermal aspects of refuges are well studied, much less is known about potential costs associated with nonthermal aspects. For example, crowding of cold‐water fishes into seasonal refuge habitats could increase parasite loads and cause declines in fitness. We assessed lamprey and anchor worm parasitism in Upper Klamath Lake where adfluvial redband trout (Oncorhynchus mykiss newberrii) move to thermal refuge habitats during summer. We sampled trout in Upper Klamath Lake during spring and in adjacent thermal refuge habitats during summer. We also evaluated survival as a function of lamprey wounding using motion‐sensing radio tags. There was a fourfold decline in the number of lamprey wounds on trout upon the onset of thermal refuge use. In contrast, cases of severe anchor worm (≥20 sores) increased threefold during thermal refuge use. Survival in thermal refuge was not different for lamprey‐wounded trout than for trout that migrated to thermal refuge without lamprey wounds. We found that both parasites were absent in a lotic population of redband trout downstream that lacked access to thermal refuge. Thus, the effects of seasonal refuge use on parasite load varied depending on the parasite taxon considered and local habitat conditions, implying that managers will likely require empirical data for focal habitats and taxa to understand how parasitism affects thermal refuge use.

show abstract

Upper temperature limit of larval Pacific lamprey Entosphenus tridentatus: implications for conservation in a warming climate

Whitesel

2022

Environ Biol Fish

View full text Add to dashboard Cite

Climate models suggest that by 2100, maximum temperatures where many larval Pacific lamprey, Entosphenus tridentatus, rear now may approach 27–31 °C. Little information exists on whether larval Pacific lamprey can tolerate these temperatures. We used acclimated chronic exposure (ACE) and direct acute exposure (DAE) experiments to determine the water temperature that is lethal to larval Pacific lamprey and whether sublethal water temperatures influence larval burrowing behavior. After 30 days in ACE experiments, all larvae survived in temperatures averaging ≤ 27.7 °C, no larvae survived in temperatures averaging ≥ 30.7 °C and the ultimate upper incipient lethal temperature (UILT) was estimated to be 29.2 °C. After seven days in DAE experiments, all larvae survived in 27.1 °C, only larvae acclimated to 23.3 °C survived in 29.1 °C, and no larvae survived in temperatures ≥ 30.6 °C. Using a time to death analysis, estimates of the UILTs ranged from 27.5 to 30.2 °C and the ultimate UILT was estimated to be > 28.3 °C. Using a percent mortality analysis, estimates of the ultimate UILT were not definitive but indicated it may be > 30.2 °C. To burrow, larvae reared for 30 days at temperatures averaging 26.9–27.7 °C exhibited more total time, active time, and stops than those reared for 30 days at temperatures averaging 22.3–23.9 °C. Our findings suggest that larval Pacific lamprey may be resilient to the most likely temperature increase scenarios predicted by climate models. However, they may be vulnerable to the high-temperature increase scenarios and, relatively high but sublethal temperatures may impact the behavior, and ultimately survival, of larval Pacific lamprey.

show abstract

Thermoadaptation Characteristics of European River Lamprey Lampetra fluviatilis Smolts

Cited by 6 publications

References 15 publications

Population Genomics of New Zealand Pouched Lamprey (kanakana; piharau;Geotria australis)

Population Genomics of New Zealand Pouched Lamprey (kanakana; piharau;Geotria australis)

Thermal refuge use and parasitism: Spatiotemporal variation in anchor worm and lamprey wounds on Klamath redband trout

Upper temperature limit of larval Pacific lamprey Entosphenus tridentatus: implications for conservation in a warming climate

Contact Info

Product

Resources

About