The Adaptive Radiation of Notothenioid Fishes in the Waters of Antarctica

Matschiner, Michael; Colombo, Marco; Damerau, Malte; Ceballos, Santiago; Hanel, Reinhold; Salzburger, Walter

doi:10.1007/978-3-319-13362-1_3

Cited by 26 publications

(21 citation statements)

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“…Species radiations, that are the rapid evolution of taxonomic, ecological and morphological disparity within a clade, have long been recognized as essential models to study organismal diversification [1]. The most extensive case of a fish radiation in the marine environment is represented by the Antarctic clade of the teleost suborder Notothenioidei that has diversified into over 120 species [2–4]. Notothenioids dominate the fish fauna on the Antarctic continental shelves, where they comprise approximately 77% of the fish species diversity and more than 90% of fish biomass [2].…”

Section: Introductionmentioning

confidence: 99%

“…Notothenioids dominate the fish fauna on the Antarctic continental shelves, where they comprise approximately 77% of the fish species diversity and more than 90% of fish biomass [2]. It is assumed that the evolutionary innovation of antifreeze glycoproteins (AFGPs) was key for the successful colonization of cold water niches, which in turn triggered the adaptive radiation of the Antarctic notothenioids [4–8]. It has further been proposed that the Antarctic notothenioid radiation was shaped by paleoclimatic changes that resulted in continuous ecological divergence into recurrently opening niches [6, 9].…”

Section: Introductionmentioning

confidence: 99%

“…The exact drivers of this radiation remain unknown, but are unlikely to be related to the putative evolutionary key innovation of notothenioids, the AFGPs, since the temperature of Patagonian waters is usually well above freezing point [13]. Furthermore, it has been shown that at least some Patagonotothen species have secondarily lost the ability to produce AFGPs [4, 7, 14]. Interestingly, an unrelated but similarly species-rich radiation has occurred in the same geographic region in the mollusc genus Nacella .…”

Section: Introductionmentioning

confidence: 99%

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Phylogenomics of an extra-Antarctic notothenioid radiation reveals a previously unrecognized lineage and diffuse species boundaries

et al. 2019

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BackgroundThe impressive adaptive radiation of notothenioid fishes in Antarctic waters is generally thought to have been facilitated by an evolutionary key innovation, antifreeze glycoproteins, permitting the rapid evolution of more than 120 species subsequent to the Antarctic glaciation. By way of contrast, the second-most species-rich notothenioid genus, Patagonotothen, which is nested within the Antarctic clade of Notothenioidei, is almost exclusively found in the non-Antarctic waters of Patagonia. While the drivers of the diversification of Patagonotothen are currently unknown, they are unlikely to be related to antifreeze glycoproteins, given that water temperatures in Patagonia are well above freezing point. Here we performed a phylogenetic analysis based on genome-wide single nucleotide polymorphisms (SNPs) derived from restriction site-associated DNA sequencing (RADseq) in a total of twelve Patagonotothen species.ResultsWe present a well-supported, time-calibrated phylogenetic hypothesis including closely and distantly related outgroups, confirming the monophyly of the genus Patagonotothen with an origin approximately 3 million years ago and the paraphyly of both the sister genus Lepidonotothen and the family Notothenidae. Our phylogenomic and population genetic analyses highlight a previously unrecognized linage and provide evidence for shared genetic variation between some closely related species. We also provide a mitochondrial phylogeny showing mitonuclear discordance.ConclusionsBased on a combination of phylogenomic and population genomic approaches, we provide evidence for the existence of a new, potentially cryptic, Patagonotothen species, and demonstrate that genetic boundaries between some closely related species are diffuse, likely due to recent introgression and/or incomplete linage sorting. The detected mitonuclear discordance highlights the limitations of relying on a single locus for species barcoding. In addition, our time-calibrated phylogenetic hypothesis shows that the early burst of diversification roughly coincides with the onset of the intensification of Quaternary glacial cycles and that the rate of species accumulation may have been stepwise rather than constant. Our phylogenetic framework not only advances our understanding of the origin of a high-latitude marine radiation, but also provides the basis for the study of the ecology and life history of the genus Patagonotothen, as well as for their conservation and commercial management.Electronic supplementary materialThe online version of this article (10.1186/s12862-019-1345-z) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phylogenomics of an extra-Antarctic notothenioid radiation reveals a previously unrecognized lineage and diffuse species boundaries

et al. 2019

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“…Bony fishes represent the most speciesrich group of vertebrates in the Antarctic region (Rocka 2006, Cemal Oguz et al 2012. Matschiner et al (2015) mentioned that only several groups of teleost fishes have been able to successfully colonize the Antarctic waters. Although the Southern Ocean represents 10% of the world's ocean waters, it contains only 1% of the recorded species, with approximately 88% of them endemic to Antarctica (Andriashev 1987).…”

Section: Introductionmentioning

confidence: 99%

Basic epidemiological data on metazoan parasites of noto-thenioid fish off James Ross Island (Prince Gustav Channel, Weddell Sea), Antarctica

Nezhybová¹,

Mašová²

2015

Czech Polar Rep.

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During the Czech Antarctic expedition 2014, 102 fish of six species (Trematomus hansoni, T. bernacchii, T. newnesi, Notothenia coriiceps, Parachaenichthys charcoti, Pagothenia borchgrevinki) were examined for parasites. The fish were caught in the Prince Gustav Channel (depth about 5-25 m) off the Johann Gregor Mendel Station on the James Ross Island. Altogether 7,925 metazoan parasites were found, which were identified to individual groups (usually classes). The most abundant were nematode larvae (prevalence 97.0 %, mean abundance 32.7 larvae/per fish), followed by acanthocephalans, especially larvae of species of Corynosoma (76.5%, 14.9) and monogeneans (77.5%, 13.0). Cestodes (Diphyllobothriidea, Tetraphyllidea) were represented by larval stages whereas trematodes only by adults. Our preliminary data may help in future studies on fish parasites in Antarctica because they indicate the most abundant groups of parasites occurring in notothenioid fish.

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“…The icefish clade belongs to the Antarctic notothenioid suborder, which radiated adaptively as the Southern Ocean began cooling ~34 million years ago (Mya) to the freezing point of seawater (-1.86C ) today; other fish groups became locally extinct (Eastman, 1993). The notothenioid radiation produced ~136 species belonging to eight recognized families, among which there are highly divergent phenotypes Matschiner et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Modeling the evolutionary loss of erythroid genes by Antarctic icefishes : analysis of the hemogen gene using transgenic and mutant zebrafish

Peters¹

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Shusdock, and Sierra Smith. I especially thank Jonah Levin, who joined the lab as a high school student and has since continued working with me. I thank Corey Allard and Drs. Donald Yergeau and Jeffrey Grim for collecting samples that I used in my studies. I owe thanks to the staff of the Marine Science Center for their support, including Roberto Valdez, Sonya Simpson, Heather Sears, David Dawson, and Ryan Hill. I thank Drs. Joseph Ayers and Justin Ries for use of their facilities and Drs. Isaac Westfield and Ryan Myers for help with scanning electron microscopy. I thank Drs. Camille Berthelot, Melody Clark, James Monaghan, and Leonard Zon for valuable discussions and providing important datasets and materials. I thank Dr. Jill de Jong and her lab for inspiring my interest in zebrafish research. I was pushed to my best by my fellow graduate students at Northeastern University. I am especially grateful to my Mom and Dad for their unending support and for reading every word I write. I am grateful to my siblings Sarah, Katie, Ryan, and Zachary for inspiring me with their passions and positive energy.

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The Adaptive Radiation of Notothenioid Fishes in the Waters of Antarctica

Cited by 26 publications

References 109 publications

Phylogenomics of an extra-Antarctic notothenioid radiation reveals a previously unrecognized lineage and diffuse species boundaries

Phylogenomics of an extra-Antarctic notothenioid radiation reveals a previously unrecognized lineage and diffuse species boundaries

Basic epidemiological data on metazoan parasites of noto-thenioid fish off James Ross Island (Prince Gustav Channel, Weddell Sea), Antarctica

Modeling the evolutionary loss of erythroid genes by Antarctic icefishes : analysis of the hemogen gene using transgenic and mutant zebrafish

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