scholarly journals Asymmetric dispersal and evolutional selection in two-patch system

2020 ◽  
Vol 40 (6) ◽  
pp. 3571-3593
Author(s):  
Yong-Jung Kim ◽  
◽  
Hyowon Seo ◽  
Changwook Yoon ◽  
◽  
...  
Keyword(s):  
Asymmetric Dispersal

Population abundance of two-patch competitive systems with asymmetric dispersal

2020 ◽  
Vol 81 (1) ◽  
pp. 315-341
Author(s):  
Yuanshi Wang ◽  
Hong Wu ◽  
Yiyang He ◽  
Zhihui Wang ◽  
Kun Hu
Keyword(s):  
Population Abundance ◽  
Competitive Systems ◽  
Asymmetric Dispersal

scholarly journals Asymmetric dispersal is a critical element of concordance between biophysical dispersal models and spatial genetic structure in Great Barrier Reef corals

2019 ◽  
Vol 25 (11) ◽  
pp. 1684-1696 ◽  
Author(s):  
Cynthia Riginos ◽  
Karlo Hock ◽  
Ambrocio M. Matias ◽  
Peter J. Mumby ◽  
Madeleine J. H. Oppen ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Great Barrier Reef ◽  
Spatial Genetic Structure ◽  
Critical Element ◽  
Barrier Reef ◽  
Reef Corals ◽  
Asymmetric Dispersal

scholarly journals Genomic analysis reveals multiple mismatches between biological and management units in yellowfin tuna (Thunnus albacares)

2018 ◽  
Vol 75 (6) ◽  
pp. 2145-2152 ◽  
Author(s):  
Rachel B Mullins ◽  
Niall J McKeown ◽  
Warwick H H Sauer ◽  
Paul W Shaw
Keyword(s):  
Indian Ocean ◽  
Genomic Analysis ◽  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Management Units ◽  
Spawning Site ◽  
Asymmetric Dispersal ◽  
Outlier Loci ◽  
The Indian Ocean ◽  
Mixed Stock

Abstract The South African (SAF) yellowfin tuna (Thunnus albacares) fishery represents a potential example of misalignment between management units and biological processes. The SAF fishery spans an operational stock with a boundary at 20°E, either side of which fish are considered part of Atlantic or Indian Ocean regional stocks. However, the actual recruitment of fish from Atlantic and Indian Ocean spawning populations into SAF waters is unknown. To address this knowledge gap, genomic analysis (11 101 SNPs) was performed on samples from Atlantic and Indian Ocean spawning sites, including SAF sites spanning the current stock boundary. Outlier loci conferred high discriminatory power to assignment tests and revealed that all SAF fish were assigned to the Indian Ocean population and that no Atlantic Ocean fish appeared in the SAF samples. Additionally, several Indian Ocean migrants were detected at the Atlantic spawning site demonstrating asymmetric dispersal and the occurrence of a mixed-stock fishery in Atlantic waters. This study highlights both the spatial inaccuracy of current stock designations and a misunderstanding of interactions between the underlying biological units, which must be addressed in light of local and global declines of the species. Specifically, the entire SAF fishery must be managed as part of the Indian Ocean stock.

scholarly journals Anthropogenic landscape change promotes asymmetric dispersal and limits regional patch occupancy in a spatially structured bird population

2012 ◽  
Vol 81 (5) ◽  
pp. 940-952 ◽  
Author(s):  
David C. Pavlacky ◽  
Hugh P. Possingham ◽  
Andrew J. Lowe ◽  
Peter J. Prentis ◽  
David J. Green ◽  
...  
Keyword(s):  
Landscape Change ◽  
Patch Occupancy ◽  
Bird Population ◽  
Anthropogenic Landscape ◽  
Asymmetric Dispersal

scholarly journals Demographic consequences and characteristics of recent population mixing and colonization in Steller sea lions, Eumetopias jubatus

2019 ◽  
Vol 101 (1) ◽  
pp. 107-120
Author(s):  
Kelly K Hastings ◽  
Michael J Rehberg ◽  
Gregory M O’corry-Crowe ◽  
Grey W Pendleton ◽  
Lauri A Jemison ◽  
...  
Keyword(s):  
Genetic Material ◽  
Genetic Lineage ◽  
Eumetopias Jubatus ◽  
Steller Sea Lions ◽  
Southeast Alaska ◽  
Population Mixing ◽  
Western Population ◽  
Sea Lions ◽  
Asymmetric Dispersal ◽  
Fitness Benefits

Abstract Steller sea lions (Eumetopias jubatus) are composed of two genetically distinct metapopulations (an increasing “eastern” and a reduced and endangered “western” population, or stock for management purposes in U.S. waters) that are only recently mixing at new rookeries in northern Southeast Alaska, east of the current stock boundary. We used mark-recapture models and 18 years of resighting data of over 3,500 individuals marked at the new rookeries and at neighboring long-established rookeries in both populations to examine morphology, survival, and movement patterns of pups born at new rookeries based on whether they had mitochondrial DNA haplotypes from the western or eastern population (mtW or mtE); examine survival effects of dispersal to the Eastern Stock region for animals born in the Western Stock region; and estimate minimum proportions of animals with western genetic material in regions within Southeast Alaska. Pups born at new rookeries with mtW had similar mass, but reduced body condition and first-year survival (approximately −10%) compared to pups with mtE. mtE pups ranged more widely than mtW pups, including more to the sheltered waters of Southeast Alaska’s Inside Passage. Fitness benefits for western-born females that dispersed to Southeast Alaska were observed as higher female survival (+0.127, +0.099, and +0.032 at ages 1, 2, and 3+) and higher survival of their female offspring to breeding age (+0.15) compared to females that remained west of the boundary. We estimated that a minimum of 38% and 13% of animals in the North Outer Coast–Glacier Bay and Lynn Canal–Frederick Sound regions in Southeast Alaska, respectively, carry genetic information unique to the western population. Despite fitness benefits to western females that dispersed east, asymmetric dispersal costs or other genetic or maternal effects may limit the growth of the western genetic lineage at the new rookeries, and these factors require further study.

scholarly journals Asymmetric dispersal in the multi-patch logistic equation

2018 ◽  
Vol 120 ◽  
pp. 11-15 ◽  
Author(s):  
Roger Arditi ◽  
Claude Lobry ◽  
Tewfik Sari
Keyword(s):  
Logistic Equation ◽  
Asymmetric Dispersal
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