2018
Hume, J.B. & Wagner, C.M.
A death in the family: sea lamprey (Petromyzon marinus) avoidance of confamilial alarm cues diminishes with phylogenetic distance Journal Article
In: Ecology and Evolution, vol. 8, iss. 7, pp. 3751–3762, 2018.
Abstract | Links | BibTeX | Tags: alarm cue, evolution, sea lamprey
@article{nokey,
title = {A death in the family: sea lamprey (Petromyzon marinus) avoidance of confamilial alarm cues diminishes with phylogenetic distance},
author = {Hume, J.B. & Wagner, C.M. },
url = {https://doi.org/10.1002/ece3.3930},
year = {2018},
date = {2018-03-09},
urldate = {2018-03-09},
journal = {Ecology and Evolution},
volume = {8},
issue = {7},
pages = {3751–3762},
abstract = {Alarm signals released after predator attack function as reliable public information revealing areas of high risk. The utility of this information can extend beyond species boundaries, benefiting heterospecifics capable of recognizing and responding appropriately to the signal. Nonmutually exclusive hypotheses explaining the acquisition of heterospecific reactivity to cues suggest it could be conserved phylogenetically following its evolution in a common ancestor (a species-level effect) and/or learned during periods of shared risk (a population-level effect; e.g., shared predators). Using a laboratory-based space-use behavioral assay, we tested the response of sea lamprey (Petromyzon marinus) to the damage-released alarm cues of five confamilial (sympatric and allopatric) species and two distantly related out-groups: a sympatric teleost (white sucker Catostomus commersonii) and an allopatric agnathan (Atlantic hagfish Myxine glutinosa). We found that sea lamprey differed in their response to conspecific and heterospecific odors; exhibiting progressively weaker avoidance of cues derived from more phylogenetically distant confamilials regardless of current overlap in distribution. Odors from out-groups elicited no response. These findings suggest that a damage-released alarm cue is at least partially conserved within the Petromyzontidae and that sea lamprey perceives predator attacks directed to closely related taxa. These findings are consistent with similar observations from gastropod, amphibian and bony fish taxa, and we discuss this in an eco-evo context to provide a plausible explanation for the acquisition and maintenance of the response in sea lamprey.},
keywords = {alarm cue, evolution, sea lamprey},
pubstate = {published},
tppubtype = {article}
}
Alarm signals released after predator attack function as reliable public information revealing areas of high risk. The utility of this information can extend beyond species boundaries, benefiting heterospecifics capable of recognizing and responding appropriately to the signal. Nonmutually exclusive hypotheses explaining the acquisition of heterospecific reactivity to cues suggest it could be conserved phylogenetically following its evolution in a common ancestor (a species-level effect) and/or learned during periods of shared risk (a population-level effect; e.g., shared predators). Using a laboratory-based space-use behavioral assay, we tested the response of sea lamprey (Petromyzon marinus) to the damage-released alarm cues of five confamilial (sympatric and allopatric) species and two distantly related out-groups: a sympatric teleost (white sucker Catostomus commersonii) and an allopatric agnathan (Atlantic hagfish Myxine glutinosa). We found that sea lamprey differed in their response to conspecific and heterospecific odors; exhibiting progressively weaker avoidance of cues derived from more phylogenetically distant confamilials regardless of current overlap in distribution. Odors from out-groups elicited no response. These findings suggest that a damage-released alarm cue is at least partially conserved within the Petromyzontidae and that sea lamprey perceives predator attacks directed to closely related taxa. These findings are consistent with similar observations from gastropod, amphibian and bony fish taxa, and we discuss this in an eco-evo context to provide a plausible explanation for the acquisition and maintenance of the response in sea lamprey.
2015
Bracken, F.S.A., Hoelzel, A.R., Hume, J.B. & Lucas, M.C.
In: Molecular Ecology, vol. 24, iss. 6, pp. 1188–1204, 2015.
Abstract | Links | BibTeX | Tags: barrier, evolution, genetics, speciation
@article{nokey,
title = {Contrasting population genetic structure among freshwater-resident and anadromous lampreys: the role of demographic history, differential dispersal, and anthropogenic barriers to movement},
author = {Bracken, F.S.A., Hoelzel, A.R., Hume, J.B. & Lucas, M.C.},
url = {https://doi.org/10.1111/mec.13112},
year = {2015},
date = {2015-02-16},
urldate = {2015-02-16},
journal = {Molecular Ecology},
volume = {24},
issue = {6},
pages = {1188–1204},
abstract = {The tendency of many species to abandon migration remains a poorly understood aspect of evolutionary biology that may play an important role in promoting species radiation by both allopatric and sympatric mechanisms. Anadromy inherently offers an opportunity for the colonization of freshwater environments, and the shift from an anadromous to a wholly freshwater life history has occurred in many families of fishes. Freshwater-resident forms have arisen repeatedly among lampreys (within the Petromyzontidae and Mordaciidae), and there has been much debate as to whether anadromous lampreys, and their derived freshwater-resident analogues, constitute distinct species or are divergent ecotypes of polymorphic species. Samples of 543 European river lamprey Lampetra fluviatilis (mostly from anadromous populations) and freshwater European brook lamprey Lampetra planeri from across 18 sites, primarily in the British Isles, were investigated for 13 polymorphic microsatellite DNA loci, and 108 samples from six of these sites were sequenced for 829 bp of mitochondrial DNA (mtDNA). We found contrasting patterns of population structure for mtDNA and microsatellite DNA markers, such that low diversity and little structure were seen for all populations for mtDNA (consistent with a recent founder expansion event), while fine-scale structuring was evident for nuclear markers. Strong differentiation for microsatellite DNA loci was seen among freshwater-resident L. planeri populations and between L. fluviatilis and L. planeri in most cases, but little structure was evident among anadromous L. fluviatilis populations. We conclude that postglacial colonization founded multiple freshwater-resident populations with strong habitat fidelity and limited dispersal tendencies that became highly differentiated, a pattern that was likely intensified by anthropogenic barriers.},
keywords = {barrier, evolution, genetics, speciation},
pubstate = {published},
tppubtype = {article}
}
The tendency of many species to abandon migration remains a poorly understood aspect of evolutionary biology that may play an important role in promoting species radiation by both allopatric and sympatric mechanisms. Anadromy inherently offers an opportunity for the colonization of freshwater environments, and the shift from an anadromous to a wholly freshwater life history has occurred in many families of fishes. Freshwater-resident forms have arisen repeatedly among lampreys (within the Petromyzontidae and Mordaciidae), and there has been much debate as to whether anadromous lampreys, and their derived freshwater-resident analogues, constitute distinct species or are divergent ecotypes of polymorphic species. Samples of 543 European river lamprey Lampetra fluviatilis (mostly from anadromous populations) and freshwater European brook lamprey Lampetra planeri from across 18 sites, primarily in the British Isles, were investigated for 13 polymorphic microsatellite DNA loci, and 108 samples from six of these sites were sequenced for 829 bp of mitochondrial DNA (mtDNA). We found contrasting patterns of population structure for mtDNA and microsatellite DNA markers, such that low diversity and little structure were seen for all populations for mtDNA (consistent with a recent founder expansion event), while fine-scale structuring was evident for nuclear markers. Strong differentiation for microsatellite DNA loci was seen among freshwater-resident L. planeri populations and between L. fluviatilis and L. planeri in most cases, but little structure was evident among anadromous L. fluviatilis populations. We conclude that postglacial colonization founded multiple freshwater-resident populations with strong habitat fidelity and limited dispersal tendencies that became highly differentiated, a pattern that was likely intensified by anthropogenic barriers.
2013
Hume, J.B., Adams, C.E., Mable, B.W. & Bean, C.W.
Sneak male mating tactics between lampreys exhibiting alternative life history strategies Journal Article
In: Journal of Fish Biology, vol. 82, iss. 3, pp. 1093–1100, 2013.
Abstract | Links | BibTeX | Tags: evolution, speciation
@article{nokey,
title = {Sneak male mating tactics between lampreys exhibiting alternative life history strategies},
author = {Hume, J.B., Adams, C.E., Mable, B.W. & Bean, C.W. },
url = {https://doi.org/10.1111/jfb.12047},
year = {2013},
date = {2013-02-25},
urldate = {2013-02-25},
journal = {Journal of Fish Biology},
volume = {82},
issue = {3},
pages = {1093–1100},
abstract = {Interspecific sneak male mating tactics between paired lamprey species are described for the first time. Although alternative mating tactics among petromyzontids have been described previously, including intraspecific sneak males, the presence of sneak male tactics between parasitic and non-parasitic forms suggests that high levels of gene flow between putative lamprey species could remain high, despite large body size discrepancies.},
keywords = {evolution, speciation},
pubstate = {published},
tppubtype = {article}
}
Interspecific sneak male mating tactics between paired lamprey species are described for the first time. Although alternative mating tactics among petromyzontids have been described previously, including intraspecific sneak males, the presence of sneak male tactics between parasitic and non-parasitic forms suggests that high levels of gene flow between putative lamprey species could remain high, despite large body size discrepancies.
Hume, J.B., Adams, C.E., Mable, B. & Bean, C.W.
Post-zygotic hybrid viability in sympatric species pairs – a case study from European lampreys Journal Article
In: Biological Journal of the Linnaean Society, vol. 108, iss. 2, pp. 378–383, 2013.
Abstract | Links | BibTeX | Tags: evolution, speciation
@article{nokey,
title = {Post-zygotic hybrid viability in sympatric species pairs – a case study from European lampreys},
author = {Hume, J.B., Adams, C.E., Mable, B. & Bean, C.W. },
url = {https://doi.org/10.1111/j.1095-8312.2012.02007.x},
year = {2013},
date = {2013-01-17},
urldate = {2013-01-17},
journal = {Biological Journal of the Linnaean Society},
volume = {108},
issue = {2},
pages = {378–383},
abstract = {Ecological speciation mechanisms are widely assumed to play an important role in the early stages of divergence between incipient species, and this especially true of fishes. In the present study, we tested explicitly for post-zygotic barriers to gene flow between a sympatric, recently diverged lamprey species pair that likely arose through ecological divergence. Experimental in vitro hybridization between anadromous parasitic Lampetra fluviatilis and resident nonparasitic Lampetra planeri resulted in a high proportion of embryos capable of attaining the burrowing pro-larval stage, strongly indicating no post-zygotic barriers to gene flow between these species. A sympatric, locally-adapted resident parasitic form of L. fluviatilis was also found to successfully hybridize with both members of this species pair. The consequences of these findings are discussed in the context of lamprey speciation.},
keywords = {evolution, speciation},
pubstate = {published},
tppubtype = {article}
}
Ecological speciation mechanisms are widely assumed to play an important role in the early stages of divergence between incipient species, and this especially true of fishes. In the present study, we tested explicitly for post-zygotic barriers to gene flow between a sympatric, recently diverged lamprey species pair that likely arose through ecological divergence. Experimental in vitro hybridization between anadromous parasitic Lampetra fluviatilis and resident nonparasitic Lampetra planeri resulted in a high proportion of embryos capable of attaining the burrowing pro-larval stage, strongly indicating no post-zygotic barriers to gene flow between these species. A sympatric, locally-adapted resident parasitic form of L. fluviatilis was also found to successfully hybridize with both members of this species pair. The consequences of these findings are discussed in the context of lamprey speciation.