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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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one publication added to basket [243008]

Impact of extreme climate and bioinvasion on temporal coupling of spring herring (Clupea harengus m.) larvae and their prey Arula, T.; Ojaveer, H.; Klais, R. (2014). Impact of extreme climate and bioinvasion on temporal coupling of spring herring (Clupea harengus m.) larvae and their prey. Mar. Environ. Res. 102: 102-109. https://dx.doi.org/10.1016/j.marenvres.2014.05.001 In: Marine Environmental Research. Applied Science Publishers: Barking. ISSN 0141-1136; e-ISSN 1879-0291, meer Ook verschenen in: Kennedy, R.; Allcock, L.; Firth, L.; Power, A.M. (Ed.) (2014). Managing biodiversity in a changing ocean: Proceedings of the 48th European Marine Biology Symposium (EMBS), Galway, Ireland, 19-23 August 2013. European Marine Biology Symposia, 48. Marine Environmental Research, 102(Suppl.). 130 pp., meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 266357 [ aanvragen ]

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Trefwoorden

Clupea harengus Linnaeus, 1758 [WoRMS]; Copepoda [WoRMS] Marien/Kust

Author keywords

Baltic Sea; Coastal zone; Extreme hydro-climate; Copepod nauplii; Non-native predator; Clupea harengus membras larvae

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Auteurs		Top
Arula, T. Ojaveer, H. Klais, R.

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Abstract

We used weekly observational data from mid-May to end of July in 1958–2012 in Gulf of Riga to investigate temporal coupling between spring herring larvae and their first prey – copepod nauplii, under the extreme hydroclimatic conditions. We focused on a small shallow estuary that is important nursery ground for larvae of the Gulf of Riga (Baltic Sea) herring population. We quantified the effect of extreme values of the winter air temperatures, time of ice retreat and spring water temperatures on the timing of peak abundance of herring larvae and copepod nauplii. We also assessed whether the invasion of the non-native cladoceran Cercopagis pengoi had notable effect on timing and abundance of copepod nauplii during the peak occurrence of herring larvae. In the years of earliest ice retreat the peak abundance of herring larvae was five weeks earlier than in the years of latest ice retreat, while the timing of nauplii remained unchanged. Abundant presence of the C. pengoi affected neither timing nor maximum abundance of copepod nauplii during the herring larvae first feeding period. Thus, we conclude that processes induced by climate variability are superior to invasion of C. pengoi in determining the timing and coupling of larval herring and copepod nauplii.

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