scholarly journals Dispersal vs. retention: correspondence of species-specific reproductive cycles and settlement periods in a blue mussel hybrid zone

2007 ◽  
Vol 351 ◽  
pp. 151-161 ◽  
Author(s):  
MR Gilg ◽  
SE Kirby ◽  
R Sullivan ◽  
LW Knapp ◽  
TJ Hilbish
Keyword(s):  
Hybrid Zone ◽  
Blue Mussel ◽  
Species Specific ◽  
Reproductive Cycles

RELATIVE ABUNDANCE AND THE SPECIES-SPECIFIC REINFORCEMENT OF MALE MATING PREFERENCE IN THE CHRYSOCHUS (COLEOPTERA: CHRYSOMELIDAE) HYBRID ZONE

Evolution ◽  
2005 ◽  
Vol 59 (12) ◽  
pp. 2639 ◽  
Author(s):  
Merrill A. Peterson ◽  
Barbara M. Honchak ◽  
Stefanie E. Locke ◽  
Timothy E. Beeman ◽  
Jessica Mendoza ◽  
...  
Keyword(s):  
Relative Abundance ◽  
Hybrid Zone ◽  
Mating Preference ◽  
Male Mating ◽  
Species Specific

scholarly journals Migratory orientation in a narrow avian hybrid zone

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3201 ◽  
Author(s):  
David P.L. Toews ◽  
Kira E. Delmore ◽  
Matthew M. Osmond ◽  
Philip D. Taylor ◽  
Darren E. Irwin
Keyword(s):  
Hybrid Zone ◽  
Genetic Background ◽  
Migratory Restlessness ◽  
Long Distance ◽  
Mountain Valley ◽  
Migratory Orientation ◽  
Isotopic Studies ◽  
Migratory Routes ◽  
Species Specific ◽  
Migratory Divide

Background Zones of contact between closely related taxa with divergent migratory routes, termed migratory divides, have been suggested as areas where hybrid offspring may have intermediate and inferior migratory routes, resulting in low fitness of hybrids and thereby promoting speciation. In the Rocky Mountains of Canada there is a narrow hybrid zone between Audubon’s and myrtle warblers that is likely maintained by selection against hybrids. Band recoveries and isotopic studies indicate that this hybrid zone broadly corresponds to the location of a possible migratory divide, with Audubon’s warblers migrating south-southwest and myrtle warblers migrating southeast. We tested a key prediction of the migratory divide hypothesis: that genetic background would be predictive of migratory orientation among warblers in the center of the hybrid zone. Methods We recorded fall migratory orientation of wild-caught migrating warblers in the center of the hybrid zone as measured by video-based monitoring of migratory restlessness in circular orientation chambers. We then tested whether there was a relationship between migratory orientation and genetic background, as measured using a set of species-specific diagnostic genetic markers. Results We did not detect a significant association between orientation and genetic background. There was large variation among individuals in orientation direction. Mean orientation was towards the NE, surprising for birds on fall migration, but aligned with the mountain valley in which the study took place. Conclusions Only one other study has directly analyzed migratory orientation among naturally-produced hybrids in a migratory divide. While the other study showed an association between genetic background and orientation, we did not observe such an association in yellow-rumped warblers. We discuss possible reasons, including the possibility of a lack of a strong migratory divide in this hybrid zone and/or methodological limitations that may have prevented accurate measurements of long-distance migratory orientation.

PATTERNS OF LARVAL DISPERSAL AND THEIR EFFECT ON THE MAINTENANCE OF A BLUE MUSSEL HYBRID ZONE IN SOUTHWESTERN ENGLAND

Evolution ◽  
2003 ◽  
Vol 57 (5) ◽  
pp. 1061 ◽  
Author(s):  
Matthew R. Gilg ◽  
Thomas J. Hilbish
Keyword(s):  
Hybrid Zone ◽  
Larval Dispersal ◽  
Blue Mussel

scholarly journals Male territorial vocalizations and responses are decoupled in an avian hybrid zone

2008 ◽  
Vol 363 (1505) ◽  
pp. 2879-2889 ◽  
Author(s):  
Paula M den Hartog ◽  
Hans Slabbekoorn ◽  
Carel ten Cate
Keyword(s):  
Hybrid Zone ◽  
Acoustic Signals ◽  
Hybrid Zones ◽  
Natural Hybrid ◽  
Individual Male ◽  
Individual Strategy ◽  
Intraspecific Communication ◽  
Selective Sensitivity ◽  
Species Specific ◽  
Male Signals

A core area of speciation research concerns the coevolution of species-specific signals and the selective sensitivity to such signals. Signals and responses to them should be tuned to each other, to be effective in intraspecific communication. Hybrid zones are ideal to study the presence of such ‘behavioural coupling’ and the mechanisms governing it, and this has rarely been done. Our study examines acoustic signals of males and their response to them in the context of territorial interactions in a natural hybrid zone between two dove species, Streptopelia vinacea and Streptopelia capicola . Male signals are important in hybrid zone dynamics as they are essential for territory establishment, which is crucial for successful reproduction. We tested whether the response of individual male hybrids is linked to how similar their own signal is to the playback signal. We did not find evidence for behavioural coupling. The combined evidence from the low level of response to hybrid and heterospecific signals outside the hybrid zone and a lack of coupling within the hybrid zone suggests that perceptual learning may explain our results. Learning to respond to locally abundant signals may be the best individual strategy and is likely to contribute to the maintenance of a hybrid zone.

Experimental evidence for species-specific habitat preferences in two flycatcher species in their hybrid zone

2007 ◽  
Vol 94 (10) ◽  
pp. 859-863 ◽  
Author(s):  
Peter Adamík ◽  
Stanislav Bureš
Keyword(s):  
Experimental Evidence ◽  
Hybrid Zone ◽  
Habitat Preferences ◽  
Species Specific

scholarly journals Temporal change of the Baltic Sea–North Sea blue mussel hybrid zone over two decades

2017 ◽  
Vol 164 (11) ◽  
Author(s):  
Petr Strelkov ◽  
Marina Katolikova ◽  
Risto Väinolä
Keyword(s):  
Baltic Sea ◽  
North Sea ◽  
Hybrid Zone ◽  
Temporal Change ◽  
Blue Mussel ◽  
The Baltic Sea ◽  
The Baltic

scholarly journals RELATIVE ABUNDANCE AND THE SPECIES-SPECIFIC REINFORCEMENT OF MALE MATING PREFERENCE IN THE CHRYSOCHUS (COLEOPTERA: CHRYSOMELIDAE) HYBRID ZONE

Evolution ◽  
2005 ◽  
Vol 59 (12) ◽  
pp. 2639-2655 ◽  
Author(s):  
Merrill A. Peterson ◽  
Barbara M. Honchak ◽  
Steranie E. Locke ◽  
Timothy E. Beeman ◽  
Jessica Mendoza ◽  
...  
Keyword(s):  
Relative Abundance ◽  
Hybrid Zone ◽  
Mating Preference ◽  
Male Mating ◽  
Species Specific

scholarly journals Maintenance of parental populations bordering a blue mussel hybrid zone by post-settlement selection

2009 ◽  
Vol 75 (3) ◽  
pp. 207-214 ◽  
Author(s):  
Matthew R. Gilg ◽  
Melissa O'Connor ◽  
Ryan Norris ◽  
Thomas J. Hilbish
Keyword(s):  
Hybrid Zone ◽  
Blue Mussel

scholarly journals Environmental Acquisition of Thiotrophic Endosymbionts by Deep-Sea Mussels of the Genus Bathymodiolus

2003 ◽  
Vol 69 (11) ◽  
pp. 6785-6792 ◽  
Author(s):  
Yong-Jin Won ◽  
Steven J. Hallam ◽  
Gregory D. O'Mullan ◽  
Irvin L. Pan ◽  
Kurt R. Buck ◽  
...  
Keyword(s):  
Vertical Transmission ◽  
Hybrid Zone ◽  
Dna Sequences ◽  
Deep Sea ◽  
Germ Line ◽  
Open Pit ◽  
Population Genetic Analysis ◽  
Cytological Evidence ◽  
Mid Atlantic Ridge ◽  
Species Specific

ABSTRACT Deep-sea Bathymodiolus mussels, depending on species and location, have the capacity to host sulfur-oxidizing (thiotrophic) and methanotrophic eubacteria in gill bacteriocytes, although little is known about the mussels' mode of symbiont acquisition. Previous studies of Bathymodiolus host and symbiont relationships have been based on collections of nonoverlapping species across wide-ranging geographic settings, creating an apparent model for vertical transmission. We present genetic and cytological evidence for the environmental acquisition of thiotrophic endosymbionts by vent mussels from the Mid-Atlantic Ridge. Open pit structures in cell membranes of the gill surface revealed likely sites for endocytosis of free-living bacteria. A population genetic analysis of the thiotrophic symbionts exploited a hybrid zone where two Bathymodiolus species intergrade. Northern Bathymodiolus azoricus and southern Bathymodiolus puteoserpentis possess species-specific DNA sequences that identify both their symbiont strains (internal transcribed spacer regions) and their mitochondria (ND4). However, the northern and southern symbiont-mitochondrial pairs were decoupled in the hybrid zone. Such decoupling of symbiont-mitochondrial pairs would not occur if the two elements were transmitted strictly vertically through the germ line. Taken together, these findings are consistent with an environmental source of thiotrophic symbionts in Bathymodiolus mussels, although an environmentally “leaky” system of vertical transmission could not be excluded.

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