Results 121 to 130 of about 26,995 (218)

An Elementary Microscopic Model of Sympatric Speciation

Using as a narrative theme the example of Darwin’s finches, a microscopic agent-based model is introduced to study sympatric speciation as a result of competition for resources in the same ecological niche. Varying competition among individuals and resource distribution, the model exhibits some of the main features of evolutionary branching processes ...
Bagnoli, F, Matteuzzi, T
openaire   +4 more sources

Recent research in the African Great Lakes: fisheries, biodiversity and cichlid evolution [PDF]

, 2003
The East African Great Lakes are now well known for (1) their fisheries, of vital importance for their rapidly rising riparian human populations, and (2) as biodiversity hotspots with spectacular endemic faunas, of which the flocks of cichlid fishes ...
Lowe-McConnell, Rosemary
core  

Population Genetics Reveals Insights Into Cryophytum Biogeography in South Africa

Ecology and Evolution, Volume 16, Issue 5, May 2026.
This study investigated the population genetic structure, biogeography and environmental drivers of divergence in Cryophytum crystallinum and C. guerichianum, two closely related Mesembryanthemoideae species, and evaluated a putative hybrid. Cryophytum crystallinum showed genetically similar populations at either end of its coastal range, with ...
Clarke J. M. van Steenderen, Emma Sandenbergh, Iain D. Paterson   +2 more
wiley   +1 more source

Integrating Sr isotopes, microchemistry, and genetics to reconstruct Salmonidae species and life history

Archaeometry, Volume 68, Issue S2, Page S104-S129, May 2026.
Abstract Recent approaches to fisheries research emphasize the importance of the coproduction of knowledge in building resilient and culturally mindful fisheries management frameworks. Despite widespread recognition of the need for Indigenous knowledge and historical reference points as baseline data, archaeological data are rarely included in ...
Ross Salerno, Remi Murdoch, Joanna Elmore, Taylor Wilcox, Jens Hegg, Catherine S. Austin, Michael LeMoine, Jade Luckhurst, Alexandra K. Fraik, Molly Carney   +9 more
wiley   +1 more source

Sympatric speciation in cave fishes?

Journal of Zoological Systematics and Evolutionary Research, 2009
The process of speciation of most cave living animals starts within the distribution area of their ancestral forms. Fishes from the phylogenetically young Micos cave population of the Mexican characid Astyanax fasciatus (Pisces) may even be found associated with large numbers of its con-specific epigean ancestor in the natural cave biotope.
H. Wilkens, Kathrin Hüppop
openaire   +1 more source

Female preference for sympatric vs. allopatric male throat color morphs in the mesquite lizard (Sceloporus grammicus) species complex.

PLoS ONE, 2014
Color polymorphic sexual signals are often associated with alternative reproductive behaviors within populations, and the number, frequency, or type of morphs present often vary among populations.
Elizabeth Bastiaans, Mary Jane Bastiaans, Gen Morinaga, José Gamaliel Castañeda Gaytán, Jonathon C Marshall, Brendan Bane, Fausto Méndez de la Cruz, Barry Sinervo   +7 more
doaj   +1 more source

The Origin and Diversification of Turmerics (Curcuma L.: Zingiberaceae) in Paleotropical Biodiversity Hotspots: The Role of Ancient Hybridisation and Historical Climate Change

Global Ecology and Biogeography, Volume 35, Issue 5, May 2026.
ABSTRACT Aim To investigate the ecological and evolutionary mechanisms driving biodiversity in the Indo‐Malayan hotspots, with a particular focus on the roles of ancient hybridisation and historical climate in shaping species diversity. Location The Indo‐Malayan realm, particularly the Western Ghats‐Sri Lanka and Indo‐Burma biodiversity hotspots.
Marcos V. Dantas‐Queiroz, Bijay Khadka, Diana L. A. Vásquez, Zuzana Chumová, Pavel Trávníček, Vojtech Zeisek, Otakar Šída, Jana Leong‐Škorničková, Piyakaset Suksathan, Hữu Đăng Trần, Mamiyil Sabu, Terezie Mandáková, Axel Dalberg Poulsen, Tomáš Fér, Eliška Záveská   +14 more
wiley   +1 more source

Bridging Mountains and Seas: Genomic and Plastid Data Evidence for Two Migration Routes of Drypis spinosa Across the Adriatic–Ionian Region

Journal of Biogeography, Volume 53, Issue 5, May 2026.
ABSTRACT Aim Amphi–Adriatic–Ionian plant taxa, distributed on both the Balkan and Apennine peninsulas, exemplify one of the many diversity patterns characteristic of the Mediterranean biodiversity hotspot. To better understand these patterns, we examined the genetic and morphological variability, as well as the present day and Last Glacial Maximum (LGM)
Peter Glasnović, Ivan Radosavljević, Sara Laura Šarančić, Damjan Mitić, Boštjan Surina   +4 more
wiley   +1 more source

Trophic specialization on unique resources despite limited niche divergence in a celebrated example of sympatric speciation. [PDF]

Ecol Freshw Fish, 2022
Galvez JR, St John ME, McLean K, Touokong CD, Gonwouo LN, Martin CH.   +5 more
europepmc   +1 more source

Inferring Time‐to‐Speciation From Hybrid Zone Analysis Informs Assessments of Taxonomic Inflation

Molecular Ecology, Volume 35, Issue 9, May 2026.
ABSTRACT Measuring gene flow across hybrid zones can provide a direct evaluation of reproductive isolation (RI) between evolutionary divergent lineages. Geographic‐explicit modelling of gene flow across hybrid zones, known as cline analysis, thus offers a gold standard for species delimitation under the biological species criterion.
Sven Gippner, Katharina Ruthsatz, Christophe Dufresnes, Miguel Vences   +3 more
wiley   +1 more source