Defining what constitutes a reliable dataset to test for hybridization and introgression in marine zooplankton: Comment on Choquet et al. 2020 “No evidence for hybridization between
            
              Calanus finmarchicus
            
            and
            
              C. glacialis
            
            in a subarctic area of sympatry”

Advances in next-generation sequencing technologies and the development of genome-reduced representation protocols have opened the way to genome-wide population studies in non-model species. However, species with large genomes remain challenging, hampering the development of genomic resources for a number of taxa including marine arthropods. Here, we developed a genome-reduced representation method for the ecologically important marine copepod Calanus finmarchicus (haploid genome size of 6.34 Gbp). We optimized a capture enrichment-based protocol based on 2656 single-copy genes, yielding a total of 154 087 high-quality SNPs in C. finmarchicus including 62 372 in common among the three locations tested. The set of capture probes was also successfully applied to the congeneric C. glacialis . Preliminary analyses of these markers revealed similar levels of genetic diversity between the two Calanus species, while populations of C. glacialis showed stronger genetic structure compared to C. finmarchicus . Using this powerful set of markers, we did not detect any evidence of hybridization between C. finmarchicus and C. glacialis . Finally, we propose a shortened version of our protocol, offering a promising solution for population genomics studies in non-model species with large genomes.

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Biological weighting of ultraviolet (280-400 nm) induced mortality in marine zooplankton and fish. II. Calanus finmarchicus (Copepoda) eggs

Marine Biology ◽

10.1007/s002270050546 ◽

1999 ◽

Vol 134 (2) ◽

pp. 285-293 ◽

Cited By ~ 53

Author(s):

J. H. M. Kouwenberg ◽

H. I. Browman ◽

J. A. Runge ◽

J. J. Cullen ◽

R. F. Davis ◽

...

Keyword(s):

Calanus Finmarchicus ◽

Marine Zooplankton

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Respiration and nitrogen excretion by some marine zooplankton in relation to their life cycles

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400032410 ◽

1968 ◽

Vol 48 (1) ◽

pp. 49-75 ◽

Cited By ~ 236

Author(s):

R. J. Conover ◽

E. D. S. Corner

Keyword(s):

Seasonal Variation ◽

Spring Bloom ◽

Gulf Of Maine ◽

Dry Weight ◽

Life Cycles ◽

Calanus Finmarchicus ◽

Nitrogen Excretion ◽

Pronounced Increase ◽

Marine Zooplankton ◽

Excretion Rates

Rates of respiration and nitrogen excretion have been measured for freshly caught Calanus finmarchicus (Gunnerus), Calanus hyperboreus (Krayer), Metridia longa (Lubbock) and Pareuchaeta norvegica (Boeck), from the Gulf of Maine at all seasons. The dry weight, total (Kjeldahl) nitrogen, and fat were also determined for the same animals. Seasonal variation in weight-corrected respiration and nitrogen excretion followed a similar pattern for all four species, being high in the spring and decreasing gradually through summer and fall to a winter minimum. However, the relative proportions of oxygen utilized to nitrogen excreted were different from season to season for each species. In Calanus spp., O: N ratios by atoms were highest in May, immediately after the spring bloom of phytoplankton, when the animals were rich in fat. With C. hyperboreus the ratio then declined gradually through summer and fall to a low point just before the spring bloom (March and April) when populations contained the least amount of fat; but with C. finmarchicus the ratio fell much more rapidly, remaining near 17 through summer and fall and increasing again with the production of the overwintering generation. In Metridia and Pareuchaeta the O:N ratios did not show as much seasonal variation, although there was a pronounced increase for Metridia just after the spring bloom. Both species usually had higher respiration and excretion rates and lower O:N ratios compared with Calanus spp.

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Faculty Opinions recommendation of Mechanism of phototaxis in marine zooplankton.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1147310.604464 ◽

2009 ◽

Author(s):

Max Telford

Keyword(s):

Marine Zooplankton

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Faculty Opinions recommendation of Giant virus with a remarkable complement of genes infects marine zooplankton.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.5910956.6591054 ◽

2010 ◽

Author(s):

Chantal Abergel

Keyword(s):

Giant Virus ◽

Marine Zooplankton

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Faculty Opinions recommendation of Hybridization and introgression drive genome evolution of Dutch elm disease pathogens.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.737477384.793572142 ◽

2020 ◽

Author(s):

Toni Gabaldón

Keyword(s):

Genome Evolution ◽

Dutch Elm Disease ◽

Hybridization And Introgression

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DNA barcoding of Antarctic marine zooplankton for species identification and recognition

ADVANCES IN POLAR SCIENCE ◽

10.3724/sp.j.1085.2013.00119 ◽

2014 ◽

Vol 24 (2) ◽

pp. 119-127 ◽

Cited By ~ 9

Author(s):

Fangping CHENG ◽

Minxiao WANG ◽

Song SUN ◽

Chaolun LI ◽

Yongshan ZHANG

Keyword(s):

Dna Barcoding ◽

Species Identification ◽

Marine Zooplankton ◽

Antarctic Marine

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Egg production of Calanus finmarchicus : effect of temperature, food and season

Marine Biology ◽

10.1007/s002270050051 ◽

1997 ◽

Vol 127 (4) ◽

pp. 609-620 ◽

Cited By ~ 115

Author(s):

H.-J. Hirche ◽

U. Meyer ◽

B. Niehoff

Keyword(s):

Egg Production ◽

Calanus Finmarchicus ◽

Effect Of Temperature

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Toward a global reference database of COI barcodes for marine zooplankton

Marine Biology ◽

10.1007/s00227-021-03887-y ◽

2021 ◽

Vol 168 (6) ◽

Author(s):

Ann Bucklin ◽

Katja T. C. A. Peijnenburg ◽

Ksenia N. Kosobokova ◽

Todd D. O’Brien ◽

Leocadio Blanco-Bercial ◽

...

Keyword(s):

Species Diversity ◽

Dna Sequences ◽

Reference Sequence ◽

Global Ocean ◽

Reference Database ◽

Data Repositories ◽

Marine Zooplankton ◽

The North ◽

Coi Sequences ◽

Taxonomic Groups

AbstractCharacterization of species diversity of zooplankton is key to understanding, assessing, and predicting the function and future of pelagic ecosystems throughout the global ocean. The marine zooplankton assemblage, including only metazoans, is highly diverse and taxonomically complex, with an estimated ~28,000 species of 41 major taxonomic groups. This review provides a comprehensive summary of DNA sequences for the barcode region of mitochondrial cytochrome oxidase I (COI) for identified specimens. The foundation of this summary is the MetaZooGene Barcode Atlas and Database (MZGdb), a new open-access data and metadata portal that is linked to NCBI GenBank and BOLD data repositories. The MZGdb provides enhanced quality control and tools for assembling COI reference sequence databases that are specific to selected taxonomic groups and/or ocean regions, with associated metadata (e.g., collection georeferencing, verification of species identification, molecular protocols), and tools for statistical analysis, mapping, and visualization. To date, over 150,000 COI sequences for ~ 5600 described species of marine metazoan plankton (including holo- and meroplankton) are available via the MZGdb portal. This review uses the MZGdb as a resource for summaries of COI barcode data and metadata for important taxonomic groups of marine zooplankton and selected regions, including the North Atlantic, Arctic, North Pacific, and Southern Oceans. The MZGdb is designed to provide a foundation for analysis of species diversity of marine zooplankton based on DNA barcoding and metabarcoding for assessment of marine ecosystems and rapid detection of the impacts of climate change.

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