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Distribution and ecology of lampreys Lethenteron spp. in interior Alaskan rivers.

https://arctichealth.org/en/permalink/ahliterature277964
Source
J Fish Biol. 2016 Dec 12;
Publication Type
Article
Date
Dec-12-2016
Author
T M Sutton
Source
J Fish Biol. 2016 Dec 12;
Date
Dec-12-2016
Language
English
Publication Type
Article
Abstract
This study describes phenetic characteristics and examines the life history of anadromous Arctic lamprey Lethenteron camtschaticum and freshwater-resident Alaskan brook lamprey Lethenteron alaskense in two tributaries of the middle Yukon River, Alaska. Larval lampreys could not be identified to species using pigmentation density patterns or trunk myomere counts, but adults could be identified to species based on colouration, body size and oral-disc dentition. Although larvae were patchily distributed in both rivers, there was a greater proportion of sample locations where Lethenteron spp. were absent in upper reaches than in middle and lower reaches. Relative abundance, density and median and maximum total length (LT ) of larvae were highly variable among sampling locations. Current velocity, substratum type and coarse woody debris were most strongly correlated with larval Lethenteron spp. density; velocity and substratum size was negatively correlated, whereas woody debris was positively correlated. Water depth, dissolved oxygen levels and specific conductance did not influence habitat selection. Length-frequency distributions, diet composition (organic detritus?=?98%), assimilation efficiency (>70%) and gut fullness (
PubMed ID
27943291 View in PubMed
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Genetic variation and populations structure among larval Lethenteron spp. within the Yukon River drainage, Alaska.

https://arctichealth.org/en/permalink/ahliterature295350
Source
J Fish Biol. 2018 Oct 10; :
Publication Type
Journal Article
Date
Oct-10-2018
Author
K G Shink
T M Sutton
J M Murphy
J A López
Author Affiliation
College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, Alaska, USA.
Source
J Fish Biol. 2018 Oct 10; :
Date
Oct-10-2018
Language
English
Publication Type
Journal Article
Abstract
The absence of information on genetic variation and population structure of brook lampreys Lethenteron spp. in the eastern part of their distribution limits our understanding of the migration ecology and spatial population genetic structure of the species. We examined genetic variation within and among three aggregations of Lethenteron spp. larvae in the Yukon River drainage, Alaska, using microsatellite genotypes. A total of 120 larval lampreys were genotyped at eight microsatellite loci. Global FST was 0.053 (95% CI 0.021-0.086), while pairwise FST values ranged from 0.048-0.057). Model-based Bayesian clustering analyses with sample locality priors (LOCPRIOR) identified three distinct, but admixed, genetic clusters that corresponded with the three aggregations. Estimates of contemporary gene flow indicate substantial reciprocal migration among sites consistent with no or low-fidelity natal homing. These results are largely in agreement with previous reports of historic and contemporary gene flow among Lethenteron spp. in other parts of their geographic distribution.
PubMed ID
30306562 View in PubMed
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