Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Heterogamety in the Baltic Glacial Relict Saduria entomon (Isopoda: Valvifera)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Journal of Crustacean Biology

Abstract This study describes the karyology of an isopod, Saduria entomon, and provides for the first time evidence of a XY/XX heterogamety for this species. The presented karyotype [56 (m + sm ) + 2 st + XX/XY] is characterised by the dominance of metacentric and submetacentric chromosomes and is considered as apomorphic. This is the first time a valviferan is described with an XX/XY system. Mitotic and meiotic heterogamety observed in S. entomon suggests more advanced evolution of sex determination within this species in comparison to other Isopoda. Based on Ag-staining the presence of secondary constrictions and satellites on the 22nd pair of homologous chromosomes was identified. Inter- and intra-individual variability in chromosome number (2n  =  58, 2n  =  59 or 2n  =  61) was also observed. The between-species variation in heterogamety in isopods and the within-species variation in chromosomes numbers are discussed.

Affiliations: 1: (MT, KS, MW) Department of Marine Ecosystem Functioning, Institute of Oceanography, University of Gdańsk, al. Piłsudskiego 46, 81-378 Gdynia, Poland


Full text loading...


Data & Media loading...

1. Audouin J. V. 1826 "Explication sommaire des planches de Crustaces de l'Egypte et de la Syrie publiees par Jules-Cesar Savigny." In, Description de l'Egypte, Histoire Naturelle Vol 1 (4) 77 98
2. Barzotti R. , Pelliccia F. , Rocchi A. 1997 "longitudinal differentiation of chromosomes of Asellus aquaticus(Crust. Isop.) by in situ nick translation using restriction enzymes and DNAse I." Chromosome Research Vol 5 521 526
3. Barzotti R. , Pelliccia F. , Rocchi A. 2000 "Sex chromosome differentiation revealed by genomic in-situhybridization." Chromosome Research Vol 8 459 464
4. Di Castro M. , Prantera G. , Cipriani L. , Rocchi A. 1983 "Silver staining analysis of nucleolar-organizer activity during spermatogenesis of Asellus aquaticus(Crustacea, Isopoda)." Genetica Vol 60 163 166
5. Forsman B. 1949 "Weitere Studien über die Rassen von Jaera albifrons Leach." Zoologiska Bidrag fran Uppsala Vol 27 449 463
6. Hidding B. M. E. , Natyaganova V. , Sherbakov D. Yu 2003 "Molecular evidence reveals a polyphyletic origin and chromosomal speciation of Lake Baikal's endemic asellid isopods." Molecular Biology Vol 12 1509 1514
7. Holmes S. 1904 "Remarks on the sexes of sphaeromids, with a description of a new species of Dynamene." Proceedings of the California Academy of Sciences (3) Zoology Vol 3 295 306
8. Howell W. M. , Black D. A. 1980 "Controlled silver-staining of nucleolus organizer regions with a protective colloidal developer: a 1-step method." Experientia Vol 36 1014 1015
9. Juchault P. , Rigaud T. 1995 "Evidence for female heterogamety in two terrestrial crustaceans and the problem of sex chromosome evolution in isopods." Heredity Vol 75 466 471
10. Kroyer H. 1849 "Zoologie, Crustaces (Atlas)." In, Gaimard P. Voyage en Scandinavie, en Laponie, au Spitzberg et aux Feroe pendant les annees 1838, 1839 et 1840 sur la Corvette la Recherche Paris
11. Levan A. , Fregda K. , Sandberg A. A. 1964 "Nomenclature for centromeric position on chromosomes." Heritas Vol 52 201 220
12. Lécher P. 1968 "Polymorphisme chromosomique dans les populations baltes et scandinaves de l'isopode Jaera( albifrons) syeiBocquet." Archives de Zoologie Exeprimentale et Generale Vol 109 211 227
13. Lécher P. , Solignac M. 1972 "Etude caryologique de Jaera( albifrons) ischiosetosa(Crustacés, Isopodes). I. Polymorphisme chromosomique Robertsonien dans trois populations d'Islande." Archives de Zoologie Exeprimentale et Generale Vol 113 439 450
14. Lécher P. , Solignac M. 1975 "Etude caryologique de Jaera( albifrons) ischiosetosa(Crustacés, Isopodes) III. Cline chromosomique des cétes ouest européennes." Archives de Zoologie Exeprimentale et Generale Vol 116 591 614
15. Linnaeus C. 1758 "Systema Naturae per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis (edit. 10)." Vol. 1. Holmiae [Stockholm]: Laurentii Salvii. pp.
16. Lovén S. L. 1862 "Om några i Vettern och Venern funna Crustaceer." Öfversigt af Konglige Vetenskaps-Akademiens Förhandlingar Vol 1861 (6) 285 314
17. Natyaganova A. V. 2000 "Extraordinary karyotyping differentiation," pp. 76 78 In, Kolchanov N. (ed.) Baicalian Endemic Isopods (Crustacea). Biodiversity and Dynamics of Ecosystems in North Eurasia. Basic Problems of Species and Ecosystems Evolution Russian Academy of Sciences SB Novosibirsk
18. Natyaganova A. V. , Kamaltynov R. M. , Sherbakov D. Yu 1996 "The Chromosomes of Baicalasellus angarensis(Isopoda, Asellidae)." Crustaceana Vol 69 696 702
19. Rigaud T. P. , Juchault J. , Mocquard P. 1997 "The evolution of sex determination in isopod crustaceans." Bioessays Vol 19 409 416
20. Salemaa H. , Heino T. 1990 "Chromosome numbers of Fennoscandian glacial relict Crustacea." Annales Zoologici Fennici Vol 27 207 210
21. Sars G. O. 1879 "Crustacea et Pycnogonida nova in itinere secundo et tertio expeditionis Norvegicae anno 1877-78 collecta." Archiv for Mathematik og Naturvidenskab, Kristiania (Oslo) Vol 4 427 476
22. Sell J. 2003 "Haplotype Frequency Distribution in northeastern European Saduria entomon(Crustacea: Isopoda) Populations. A Phylogeographic Approach." International Review on Hydrobiology Vol 88 582 593
23. Sell J. 2006 Zróżnicowanie genetyczne reliktowych bałtyckich i arktycznych populacji Saduria entomon L. (Crustacea: Isopoda) Wydawnictwo Uniwersytetu Gdańskiego Gdańsk
24. Shuster S. M. , Levy L. 1990 "Sex-Linked Inheritance of a Cuticular Pigmentation Marker in the Marine Isopod, Paracerceis sculptaHolmes (Crustacea: Isopoda: Sphaeromatidae)." Journal of Heredity Vol 90 304 307
25. Siegismund H. R. 2002 "Disparity in Population Differentiation of Sex-Linked and Autosomal Variation in Sibling Species of the Jaera albifrons (Isopoda) Complex." Journal of Heredity Vol 93 432 439
26. Siegismund H. R. , Christensen B. 1992 "A Sex-Linked Enzyme Polymorphism in the Marine Isopod Jaera ischiosetosa." Journal of Heredity Vol 83 388 393
27. Thiriot–Quievreux C. , Ayraud N. 1982 "Les caryotypes de quelques espèces de bivalves et de gastéropodes marins." Marine Biology Vol 70 165 172
28. Trentini M. , Corni M. G. 1987 "The chromosomes of Idotea balthica basteriAudouin (Isopoda, Valvifera)." Crustaceana Vol 53 78 82

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Journal of Crustacean Biology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation