Open Access Repository

Diel shifts in the structure and function of nearshore estuarine fish communities

Yeoh, DE, Valesini, FJ, Hallett, CS, Abdo, DA and Williams, J ORCID: 0000-0002-4173-3855 2017 , 'Diel shifts in the structure and function of nearshore estuarine fish communities' , Journal of Fish Biology, vol. 90, no. 4 , pp. 1214-1243 , doi: 10.1111/jfb.13222.

Full text not available from this repository.

Abstract

Day–night shifts in the nearshore fish fauna of a temperate microtidal estuary were assessed using a holistic suite of structural and functional community attributes. Mean fish species richness and diversity (taxonomic distinctness) were higher at night across all regions of the estuary and seasons, concurring with the findings of numerous comparable studies reviewed worldwide, while the diel period in which mean abundance was higher varied among seasons. Likewise, species and functional guild compositions (the latter based on feeding modes and habitat use) both differed significantly between day and night, with the extent of the diel shift again varying seasonally. Daytime fish communities were characterized by higher abundances of Atherinidae, Sillaginidae and Mugilidae, while Gobiidae were far more abundant at night. Marked shifts in size composition were also evident, with smaller fishes (LT) being more prevalent during the day and larger fishes (≥200 mm LT) proportionally more abundant at night. The above diel shifts were feasibly related to a range of predator–prey interactions and feeding-related movements, namely a nocturnal decrease in top-order avian piscivory coupled with an increase in invertebrate prey availability, resulting in changes in the presence and catchability of certain fish species in shallow estuarine waters.

Item Type: Article
Authors/Creators:Yeoh, DE and Valesini, FJ and Hallett, CS and Abdo, DA and Williams, J
Keywords: estuarine fish, Walpole, fish community, climate change, marine park, estuarine ecology, environmental flows
Journal or Publication Title: Journal of Fish Biology
Publisher: Blackwell Publishing Ltd
ISSN: 0022-1112
DOI / ID Number: 10.1111/jfb.13222
Copyright Information:

Copyright 2016 The Fisheries Society of the British Isles

Related URLs:
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP