scholarly journals Two’s company, three’s a crowd: fine-scale habitat partitioning by depth among sympatric species of marine mesopredator

2016 ◽  
Vol 561 ◽  
pp. 173-187 ◽  
Author(s):  
NE Humphries ◽  
SJ Simpson ◽  
VJ Wearmouth ◽  
DW Sims
Keyword(s):  
Sympatric Species ◽  
Habitat Partitioning ◽  
Fine Scale

Fine-scale habitat partitioning facilitates sympatry between two octopus species in a shallow Florida lagoon

2019 ◽  
Vol 609 ◽  
pp. 151-161 ◽  
Author(s):  
CO Bennice ◽  
AP Rayburn ◽  
WR Brooks ◽  
RT Hanlon
Keyword(s):  
Habitat Partitioning ◽  
Fine Scale

Dolphin sympatric ecology in a tropical fjord: habitat partitioning by bathymetry and topography as a strategy to coexist

2007 ◽  
Vol 87 (5) ◽  
pp. 1327-1335 ◽  
Author(s):  
Lenin Oviedo
Keyword(s):  
Habitat Use ◽  
Bottlenose Dolphins ◽  
Marine Ecosystem ◽  
Sympatric Species ◽  
Ecological Niches ◽  
Habitat Partitioning ◽  
Sympatric Populations ◽  
Pacific Waters ◽  
Stenella Attenuata ◽  
Niche Factor

Sympatric species need to avoid pervasive competition to counter its suppressor effects. Dietary divergence and habitat partitioning are strategies for coexistence. Golfo Dulce is a tropical fjord located in the southern Pacific waters of Costa Rica. This embayment is characterized by the mixture of neritic and oceanic-like features. Sympatric populations of spotted and bottlenose dolphins share this particular marine ecosystem. To analyse the means of coexistence among both dolphin populations, an approach using the marginality and specialization indices of ecological niche factor analysis was used to establish separation between realized niches of both species. Habitat partitioning is sustained by difference in habitat use; bathymetry and topography separated both species' ecological niches. Dietary divergence could not be concluded because of lack of accurate dietary information. Nevertheless, it is likely to be separated by consumption of demersal prey by Tursiops truncatus, and pelagic prey by Stenella attenuata, accordingly with the differences in habitat use. Golfo Dulce could be perceived as an area of conservation importance: a geographical unit considered to contain special conservation values for both dolphin species.

scholarly journals Don’t throw out the sympatric species with the crater lake water: fine-scale investigation of introgression provides weak support for functional role of secondary gene flow in one of the clearest examples of sympatric speciation

2017 ◽  
Author(s):  
Emilie J. Richards ◽  
Jelmer W. Poelstra ◽  
Christopher H. Martin
Keyword(s):  
Gene Flow ◽  
Crater Lake ◽  
Morphological Diversity ◽  
Sympatric Speciation ◽  
Sympatric Species ◽  
Fine Scale ◽  
Ancestral Polymorphism ◽  
Hybrid Swarm ◽  
Weak Support ◽  
History Of

AbstractGenomic data has revealed complex histories of colonization and repeated gene flow previously unrecognized in some of the most celebrated examples of sympatric speciation and radiation. However, much of the evidence for secondary gene flow into these radiations comes from genome-wide tests, which tells us little about how gene flow potentially influenced sympatric diversification. Here we investigated whole genomes of Barombi Mbo crater lake cichlids for fine-scale patterns of introgression between species with neighboring riverine cichlid populations. We did find evidence of secondary gene flow into the radiation scattered across < 0.24% of the genome; however, the functional and genetic diversity in these regions paint no clear picture of how that variation could have contributed to the ecological and morphological diversity found in the lake. Our results suggest that either variation in novel genetic pathways introduced during secondary gene flow contributed to the radiation, or that secondary gene flow was predominantly neutral with respect to the diversification processes. We also found evidence for differential assortment of ancestral polymorphism found in riverine populations between sympatric sister species, suggesting the presence of a hybrid swarm in the past. While the history of gene flow and colonization appears to be more complicated than once thought, the lack of compelling evidence for secondary gene flow influencing diversification suggests that we should not yet rule out one of the most celebrated examples of sympatric speciation in nature.

scholarly journals Fine‐scale habitat partitioning of Chilean and Peale's dolphins and their overlap with aquaculture

2019 ◽  
Vol 29 (S1) ◽  
pp. 212-226 ◽  
Author(s):  
Sonja Heinrich ◽  
Tilen Genov ◽  
Marjorie Fuentes Riquelme ◽  
Philip S. Hammond
Keyword(s):  
Habitat Partitioning ◽  
Fine Scale
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