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1. A call for a paradigm shift: Assumed‐to‐be premature migrants actually yield good returns

Author:
Birnie‐Gauvin, Kim; Aarestrup, Kim
Source:
Ecology of freshwater fish 2019 v.28 no.1 pp. 62-68
ISSN:
0906-6691
Subject:
Salmo trutta; adults; autumn; freshwater; juveniles; marine environment; migratory behavior; phenotypic plasticity; saline water; smolts; spring; streams; transponders
Abstract:
... Animals with complex life cycles often display plasticity in the timing of transitions across life stages. The brown trout, Salmo trutta, highlights such phenotypic plasticity with its alternative migratory tactics. Downstream migration of smolts exemplifies one of the many ways in which brown trout display plasticity. The timing of this migration is assumed to be in the spring, although recent ev ...
DOI:
10.1111/eff.12431

2. Acquisition of obligate mutualist symbionts during the larval stage is not beneficial for a coral host

Author:
Hartmann, Aaron C.; Marhaver, Kristen L.; Klueter, Anke; Lovci, Michael T.; Closek, Collin J.; Diaz, Erika; Chamberland, Valérie F.; Archer, Frederick I.; Deheyn, Dimitri D.; Vermeij, Mark J. A.; Medina, Mónica
Source:
Molecular ecology 2019 v.28 no.1 pp. 141-155
ISSN:
0962-1083
Subject:
Scleractinia; Symbiodiniaceae; adults; coral reefs; corals; eggs; endosymbionts; gene expression; hosts; juveniles; larvae; life history; lipids; mutualism; parents; photosynthesis; plankton; progeny; reproductive fitness; swimming; Caribbean
Abstract:
... Theory suggests that the direct transmission of beneficial endosymbionts (mutualists) from parents to offspring (vertical transmission) in animal hosts is advantageous and evolutionarily stable, yet many host species instead acquire their symbionts from the environment (horizontal acquisition). An outstanding question in marine biology is why some scleractinian corals do not provision their eggs a ...
DOI:
10.1111/mec.14967

3. Reduced skin bacterial diversity correlates with increased pathogen infection intensity in an endangered amphibian host

Author:
Ellison, Silas; Knapp, Roland A.; Sparagon, Wesley; Swei, Andrea; Vredenburg, Vance T.
Source:
Molecular ecology 2019 v.28 no.1 pp. 127-140
ISSN:
0962-1083
Subject:
Batrachochytrium dendrobatidis; Burkholderiales; DNA; DNA barcoding; Rana; adults; bacteria; community structure; enzootic diseases; frogs; fungi; juveniles; metabolites; microbial communities; microbiome; mountains; nucleotide sequences; pathogens; probiotics; ribosomal RNA; species richness
Abstract:
... The fungal pathogen Batrachochytrium dendrobatidis (Bd) infects the skin of amphibians and has caused severe declines and extinctions of amphibians globally. In this study, we investigate the interaction between Bd and the bacterial skin microbiome of the endangered Sierra Nevada yellow‐legged frog, Rana sierrae, using both culture‐dependent and culture‐independent methods. Samples were collected ...
DOI:
10.1111/mec.14964
CHORUS:
10.1111/mec.14964