Universität zu Köln

Langkau, M. C., Clave, D., Schmidt, M. B. and Borcherding, J. (2016). Spawning behaviour of Allis shad Alosa alosa: new insights based on imaging sonar data. J. Fish Biol., 88 (6). S. 2263 - 2275. HOBOKEN: WILEY. ISSN 1095-8649

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Abstract

Spawning behaviour of Alosa alosa was observed by high resolution imaging sonar. Detected clouds of sexual products and micro bubbles served as a potential indicator of spawning activity. Peak spawning time was between 0130 and 0200 hours at night. Increasing detections over three consecutive nights were consistent with sounds of mating events (bulls) assessed in hearing surveys in parallel to the hydro acoustic detection. In 70% of the analysed mating events there were no additional A. alosa joining the event whilst 70% of the mating events showed one or two A. alosa leaving the cloud. In 31% of the analysed mating events, however, three or more A. alosa were leaving the clouds, indicating that matings are not restricted to a pair. Imaging sonar is suitable for monitoring spawning activity and behaviour of anadromous clupeids in their spawning habitats. (C) 2016 The Fisheries Society of the British Isles

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Langkau, M. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Clave, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, M. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Borcherding, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-272733
DOI:	10.1111/jfb.12978
Journal or Publication Title:	J. Fish Biol.
Volume:	88
Number:	6
Page Range:	S. 2263 - 2275
Date:	2016
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1095-8649
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ALTERNATIVE REPRODUCTIVE TACTICS; UPSTREAM MIGRATION; FISH; SHALLOW; RIVER; ULTRASOUND Multiple languages Fisheries; Marine & Freshwater Biology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27273