Phylogeography of Red King Crab

Grant, W. Stewart; Zelenina, D. A.; Mugue, Nikolai

doi:10.1201/b16664-4

Cited by 6 publications

(2 citation statements)

References 82 publications

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“…Considerations for fishery management should recognize the mitochondrial genetic diversity observed here, with a special focus on those localities where this diversity is greatest. In this sense, it would be interesting to carry out phylogeographic analyses at a finer scale with other more variable molecular markers to define population boundaries for harvest management and recognize biodiversity hotspots in order to conserve them (e.g., Red King Crab in Alaska, Grant et al, 2014 ). However, before any consideration, the taxonomic status of Lithodes on SEP coasts should be re‐examined.…”

Section: Discussionmentioning

confidence: 99%

Assessing diversity of King Crab Lithodes spp. in the south‐eastern pacific using phylogeny and molecular species delimitation methods

Pinochet

Pardo

Cárdenas

2022

Ecology and Evolution

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The purpose of this study was to test the hypothesis that the genetic diversity of commercially significant species of King Crabs ( Lithodes spp.) along the south‐eastern Pacific (SEP) comprises different independent evolutionary units (IEUs) with spatially isolated distribution. Nine localities from inner and open waters along the SEP Chilean coast (39°S‐55°S) were sampled. We analyzed sequences from 173 individuals for the mitochondrial gene Cytochrome oxidase I (COX‐I), 151 individuals for the Internal Transcribed Spacer 1 (ITS) and 135 for the structural ribosomal RNA (28S). Genetic delimitation was performed through three analytical methods: ABGD, GMYC, and its Bayesian implementation, bGMYC. Bayesian phylogenetic analyses and haplotype networks were also performed. Divergence time between clades was assessed for the COX‐I marker and estimated from known evolutionary rates for this marker in other crustacean species and fossil calibration from other Anomuran species. Delimitation analyses, phylogenetic analyses, and mitochondrial haplotype networks suggested the presence of two deeply divergent mitochondrial lineages of Lithodes in the SEP, referred to as Clade1 and Clade 2. Nuclear markers showed low phylogenetic resolution and therefore were unsuitable for molecular species delimitation. Divergence time analysis of the mitochondrial lineages suggests a separation between Clades of approximately 2.3 Mya. The divergence time obtained suggested that Pliocene glaciations and deglaciations cycles could be involved in hybridization events between Lithodes IEUs at southern tip of South American coasts. The different frequencies of Lithodes haplotypes in inner and open water environments along SEP coasts could be explained by events such as the last glacial maximum or by differences in the adaptation of each clade to different environments. These findings support the necessity of evaluating the taxonomic status of Lithodes individuals found along SEP coasts under an integrative taxonomy approach or through markers with other evolution rates than those already used.

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Section: Discussionmentioning

confidence: 99%

Assessing diversity of King Crab Lithodes spp. in the south‐eastern pacific using phylogeny and molecular species delimitation methods

Pinochet

Pardo

Cárdenas

2022

Ecology and Evolution

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“…Research on golden king crab genetics could reveal stock structure and provide management information to create biologically representative management areas to better manage the fishery. Genetic studies of red king crabs in the North Pacific revealed three distinct genetic groupings: (i) Adak Island, (ii) Bering Sea–Gulf of Alaska and (iii) Southeast Alaska, with Southeast Alaska having the lowest levels of genetic diversity and mtDNA, but significant genetic heterogeneity among populations over a small geographic scale [ 71 , 72 ]. This result suggests that the glacial fjord system and enclosed bays of Southeast Alaska may result in decreased connectivity among king crab populations, with potentially limited larval dispersal and limited gene flow resulting in self-recruiting populations [ 71 – 73 ].…”

Section: Discussionmentioning

confidence: 99%

Spatial variability in size at maturity of golden king crab (Lithodes aequispinus) and implications for fisheries management

2018

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Many crab fisheries around the world are managed by size, sex and season, where males are given at least one opportunity to reproduce before being harvested. Golden king crab (Lithodes aequispinus) supports a commercial fishery in Southeast Alaska and legal size is based on growth and maturity information from other parts of their range. Size-at-maturity estimates varied for crabs among seven management areas in Southeast Alaska, where male maturity estimates increased in size with increases in latitude, while maturity estimates across their North Pacific range decreased in size with increases in latitude. Depth, temperature and harvest history were not related to variation observed in male maturity estimates. Management implications from this research include reducing legal size in some areas to maximize harvest potential and increasing in others to allow male crabs the opportunity to reproduce before being harvested. A more conservative strategy would incorporate the largest maturity estimate, thus increasing the legal size which would have a negative impact to the commercial fishery, but allow male crabs the opportunity to reproduce before being harvested. This study shows the importance of understanding how life-history characteristics change over space and the challenge incorporating spatial variability for improved fisheries management.

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Comparative phylogeography of the ocean planet

Bowen

Gaither

DiBattista

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

221

198

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Understanding how geography, oceanography, and climate have ultimately shaped marine biodiversity requires aligning the distributions of genetic diversity across multiple taxa. Here, we examine phylogeographic partitions in the sea against a backdrop of biogeographic provinces defined by taxonomy, endemism, and species composition. The taxonomic identities used to define biogeographic provinces are routinely accompanied by diagnostic genetic differences between sister species, indicating interspecific concordance between biogeography and phylogeography. In cases where individual species are distributed across two or more biogeographic provinces, shifts in genotype frequencies often align with biogeographic boundaries, providing intraspecific concordance between biogeography and phylogeography. Here, we provide examples of comparative phylogeography from (i) tropical seas that host the highest marine biodiversity, (ii) temperate seas with high productivity but volatile coastlines, (iii) migratory marine fauna, and (iv) plankton that are the most abundant eukaryotes on earth. Tropical and temperate zones both show impacts of glacial cycles, the former primarily through changing sea levels, and the latter through coastal habitat disruption. The general concordance between biogeography and phylogeography indicates that the population-level genetic divergences observed between provinces are a starting point for macroevolutionary divergences between species. However, isolation between provinces does not account for all marine biodiversity; the remainder arises through alternative pathways, such as ecological speciation and parapatric (semiisolated) divergences within provinces and biodiversity hotspots.biogeography | coral reefs | evolution | marine biodiversity | speciation P hylogeography has roots in biogeography, wherein geographic provinces are identified by concordant shifts in species composition. If the partitions defined by taxonomy are regarded as first-order approximations of evolutionary genetic separations, then continuity between biogeography and phylogeography is apparent. Marine biogeography, the study of species' distributions and evolutionary processes in the sea, began in the mid19th century based on taxonomic distinctions. Dana (1) divided the surface waters of the world into several temperature zones based on the distributions of corals and crustaceans. Woodward (2) identified a series of marine provinces based on the distributions of mollusks. Forbes (3) made three enduring observations: (i) each biogeographic province is a center of origin for new species, (ii) these new species tend to migrate outward from the center of origin, and (iii) provinces, like species, must be traced back to their historical origins to be understood. These three fundamental contributions appeared in the same decade in which Darwin and Wallace (4) and Darwin (5) identified geography and natural selection as agents of evolutionary change.It is remarkable that five essential publications in the 1850s (1-5) set the stage ...

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Phylogeography of Red King Crab

Cited by 6 publications

References 82 publications

Assessing diversity of King Crab Lithodes spp. in the south‐eastern pacific using phylogeny and molecular species delimitation methods

Assessing diversity of King Crab Lithodes spp. in the south‐eastern pacific using phylogeny and molecular species delimitation methods

Spatial variability in size at maturity of golden king crab (Lithodes aequispinus) and implications for fisheries management

Comparative phylogeography of the ocean planet

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