Universität zu Köln

Grunicke, Felix ORCID: 0000-0002-8250-0986, Wagner, Annekatrin ORCID: 0000-0003-2159-9609, von Elert, Eric, Weitere, Markus and Berendonk, Thomas ORCID: 0000-0002-9301-1803 (2023). Riparian detritus vs. stream detritus: food quality determines fitness of juveniles of the highly endangered freshwater pearl mussels (Margaritifera margaritifera). Hydrobiologia, 850 (3). S. 729 - 747. DORDRECHT: SPRINGER. ISSN 1573-5117

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Abstract

Detritus is an important energy source of stream food webs. Being a mix of allochthonous and autochthonous sources, it is often unknown, which components contribute to the growth of stream organisms. This study focussed on the comparison of two different detritus types (riparian detritus and stream detritus) with respect to food quality and effects on growth as a fitness parameter of juvenile freshwater pearl mussels (FPM). We performed feeding experiments with juvenile FPM under laboratory conditions using the two detritus types from four different natural sources each. Food quality was determined by analysing the fatty acid composition. Stream detritus (conditioned to stream environment including autochthonous microbes) resulted in significantly higher growth rates of juvenile FPM than predominately terrestrial-based riparian detritus indicating higher food quality. Significantly positive correlations were found between mussel growth and different groups of polyunsaturated fatty acids (PUFA). This suggests that especially trace substances such as long-chained n-3 PUFAs and a high ratio of n-3 to n-6 PUFAs enhance the food quality of stream detritus for juvenile FPM. These results highlight the importance of instream conditioning of detritus for the food mix in headwater streams and the importance of PUFAs for the development of juvenile FPM.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Grunicke, Felix UNSPECIFIED orcid.org/0000-0002-8250-0986 UNSPECIFIED Wagner, Annekatrin UNSPECIFIED orcid.org/0000-0003-2159-9609 UNSPECIFIED von Elert, Eric UNSPECIFIED UNSPECIFIED UNSPECIFIED Weitere, Markus UNSPECIFIED UNSPECIFIED UNSPECIFIED Berendonk, Thomas UNSPECIFIED orcid.org/0000-0002-9301-1803 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-676193
DOI:	10.1007/s10750-022-05120-3
Journal or Publication Title:	Hydrobiologia
Volume:	850
Number:	3
Page Range:	S. 729 - 747
Date:	2023
Publisher:	SPRINGER
Place of Publication:	DORDRECHT
ISSN:	1573-5117
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language POLYUNSATURATED FATTY-ACIDS; GROWTH; EXPERIENCE; SURVIVAL; SIZE; WEBS Multiple languages Marine & Freshwater Biology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67619