RESEARCH PAPER
Effective growth cessation in adult Unio crassus Philipsson, 1788 (Bivalvia: Unionidae) from Germany
 
More details
Hide details
CORRESPONDING AUTHOR
Karl-Otto Nagel   

Dr.-Gremmelsbacher-Str., 6, 79199 Kirchzarten, Germany
Submission date: 2015-10-12
Final revision date: 2015-10-27
Acceptance date: 2015-10-31
Publication date: 2015-12-01
 
Folia Malacol. 2015;23(4):309–313
 
KEYWORDS
ABSTRACT
Information on the growth and age of the endangered freshwater mussel Unio crassus Philipsson, 1788 is crucial to correctly assess the conservation status of a particular population. This long-term study of individually marked specimens from four populations from central and southwest Germany revealed that zero growth and shrinkage of adult mussels from the upper 50% of their population’s length range were common phenomena. Therefore, overall shell length measurements or counting of growth lines on the shells of live adult mussels may grossly underestimate their age and should be regarded as unsuitable for determining the actual age structure of a population
 
REFERENCES (17)
1.
Anthony J. L., Kesler D. H., Downing W. L., Downing J. A. 2001. Length-specific growth rates in freshwater mussels (Bivalvia: Unionidae): extreme longevity or generalised growth cessation? Freshwater Biol. 46: 1349–1359. http://dx.doi.org/10.1046/j.13....
 
2.
Bailey R. C., Green R. H. 1988. Within-basin variation in the shell morphology and growth rate of a freshwater mussel. Can. J. Zool: 66: 1704–1708. http://dx.doi.org/10.1139/z88-....
 
3.
Björk S. 1962. Investigations on Margaritifera margaritifera and Unio crassus: limnologic studies in rivers in South Sweden. In: Thunmark S. (ed.). Acta Limnologica. Vol. 4. Blom, Lund, pp. 1–109.
 
4.
Day M. E. 1984. The shell as a recording device: growth and shell ultrastructure of Lampsilis radiata radiata (Pelecypoda: Unionidae). Can. J. Zool. 62: 2495–2504. http://dx.doi.org/10.1139/z84-....
 
5.
Douda K. 2007. The occurrence and growth of Unio crassus (Mollusca: Bivalvia: Unionidae) in Lužnice River basin in respect to water quality. Acta Univ. Carol. Environ. 21: 57–63.
 
6.
Downing W. L., Downing J. A. 1993. Molluscan shell growth and loss. Nature 362: 506. http://dx.doi.org/10.1038/3625....
 
7.
Falkner G. 1986. Untersuchungen zum Vorkommen und zur Populationsstruktur von Unio crassus im Haselbach (Lkr. Günzburg) als Grundlage künftiger Artenschutzmaßnahmen. Report on behalf of Bayerisches Landesamt für Umweltschutz, Hörlkofen, pp. 1–39, annexe.
 
8.
Haag W. R., Commens-Carson A. M. 2008. Testing the assumption of annual shell ring deposition in freshwater mussels. Can. J. Fish. Aquat. Sci. 65: 493–508. http://dx.doi.org/10.1139/f07-....
 
9.
Haag W. R., Rypel A. L. 2011. Growth and longevity in freshwater mussels: evolutionary and conservation implications. Biol. Rev. 86: 225–247. http://dx.doi.org/10.1111/j.14....
 
10.
Haukioja E., Hakala T. 1978. Measuring growth from shell rings in populations of Anodonta piscinalis (Pelecypoda, Unionidae). Ann. Zool. Fenn. 15: 60–65.
 
11.
Hochwald S. 2001. Plasticity in life-history traits in Unio crassus. In: Bauer G., Wächtler K. (eds). Ecology and evolutionary biology of the freshwater mussels Unionoida. Ecological studies. Vol. 145. Springer Verlag, Berlin, Heidelberg, pp. 51–80. http://dx.doi.org/10.1007/978-....
 
12.
Nagel K.-O. 1991. Gefährdete Flußmuscheln in Hessen. 1. Wachstum, Reproduktionsbiologie und Schutz der Bachmuschel (Bivalvia: Unionidae: Unio crassus). Z. Angew. Zool. 78: 205–218.
 
13.
Neves R. J., Moyer S. N. 1988. Evaluation of techniques for age determination of freshwater mussels (Unionidae). Amer. Malac. Bull. 6: 179–188.
 
14.
Sárkány-Kiss A. 1997. Structure and aspects of dynamic of the unionid associations of the Crişul Alb/Fehér-Körös river at Ineu. In: Sárkány-Kiss, A., Hamar, J. (eds). The Criş/Körös Rivers’ Valleys. Tiscia Monograph Series. Vol. 2. Tisza Klub – Liga Pro Europa, Szolnok, Szeged, Târgu Mureş, pp. 203–207.
 
15.
Timm H., Mutvei H. 1993. Shell growth of the freshwater unionid Unio crassus from Estonian rivers. Proc. Estonian Acad. Sci. Biol. 42: 55–67.
 
16.
Tudorancea C., Gruia L. 1968. Observations on the Unio crassus population from the Nera river. Trav. Mus. Nat. His. Nat. Gr. Antipa 8: 381–394.
 
17.
Zettler M. L. 1997. Morphometrische Untersuchungen an Unio crassus Philipsson 1788 aus dem nordeuropä­ischen Vereisungsgebiet (Bivalvia: Unionidae). Malakol. Abh. 18: 213–232.
 
 
CITATIONS (2):
1.
Occurrence and distribution of the endangered freshwater mussels Unio crassus and Pseudanodonta complanata (Bivalvia: Unionida) in the Pisa River, north-eastern Poland
Małgorzata Ożgo, Maria Urbańska, Magdalena Marzec, Andrzej Kamocki
Folia Malacologica
 
2.
Growth, reproductive traits and habitat patterns of Unio ravoisieri (Mollusca: Bivalvia) from Ichkeul Lake tributaries (Northern Tunisia)
Noureddine Khalloufi, Chrifa Aissaoui, Mustapha Béjaoui
Biologia
 
eISSN:2300-7125
ISSN:1506-7629