Movement of larval fishes through the entrance channel of a seasonally open estuary in Western Australia

Neira, Francisco J.; Potter, I. C.

doi:10.1016/s0272-7714(05)80114-3

Cited by 53 publications

(36 citation statements)

References 20 publications

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“…Planktonic postflexion larvae and juveniles, including three gobiids and a clupeid Konosirus punctatus, were collected mostly during flood tide, as previously reported for other estuaries and tidal channels (e.g., Drake and Arias, 1991;Neira and Potter, 1992;Young and Potter, 2003), indicating that they were carried from the direction of the bay to the present site by tidal currents. The flood tide abundances of these planktonic fishes were divided into the following two groups: greatest abundance at night (e.g., Acanthogobius flavimanus and Gymnogobius breunigii), and greater abundance during both day and night (e.g., G. macrognathos and K. punctatus).…”

Section: Discussionsupporting

confidence: 62%

Larval and juvenile fishes occurring with flood tides on an intertidal mudflat in the Tama River estuary, central Japan

2005

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Intertidal movements of fish larvae and juveniles on a mudflat in the Tama River estuary, central Japan, were investigated by comparing the abundance and sizes of fishes caught in the intertidal zone during flood tides with those in the subtidal zone during low tides. A total of 28 465 individuals, belonging to 9 families and 20 species, were collected by small purse seine. Among the abundant species, planktonic larvae and juveniles of gobiids and Konosirus punctatus were more abundant in the intertidal zone at flood tide than the subtidal zone at low tide. Similar occurrence patterns were found in juvenile Plecoglossus altivelis altivelis and Lateolabrax japonicus, having fully developed swimming abilities. In contrast to these species, much higher abundances of epibenthic juveniles of 2 gobiids (Acanthogobius flavimanus and Gymnogobius macrognathos) were found in the subtidal zone at low tide, although they also utilized the intertidal zone at flood tide.

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Section: Discussionsupporting

confidence: 62%

Larval and juvenile fishes occurring with flood tides on an intertidal mudflat in the Tama River estuary, central Japan

2005

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“…The number of species occurring in these systems however, is considerably lower than the diversity of fishes in permanently open estuaries. The diversity of fishes occurring in similar intermittently open systems in temperate Australia (Neira & Potter 1992a) also appears considerably higher and this is attributed to the larger size of these Australian estuary types. The dominance of larvae of estuary-resident fishes in both temperate Australian (Neira & Potter 1992b) and South African estuaries in intermittently open systems appears similar.…”

Section: Discussionmentioning

confidence: 99%

The role of estuarine type in characterizing early stage fish assemblages in warm temperate estuaries, South Africa

Strydom

Whitfield

Wooldridge³

2003

African Zoology

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Assemblages of early stage fishes (larval and early juvenile stages) were investigated and compared in seven permanently open and five intermittently open estuarine systems on the warm temperate Eastern Cape coast of South Africa. Estuarine type, by virtue of mouth state and prevailing physico chemical conditions, played a defining role in the structure of these fish assemblages. Clupeidae and Gobiidae were the dominant fish families in both estuarine types. Permanently open estuaries were characterized by the predominance of larvae and early juveniles of estuary dependent marine fish species while estuary resident fishes dominated intermittently open estuaries. Seasonal changes were observed in species density and diversity in both estuarine types. Species richness and diversity were highest in the permanently open Swartkops Estuary that is characterized by large nursery habitat availability. Species diversity was high in estuaries with a good supply of freshwater, that results in good recruitment of estuary dependent marine species. Similarly, freshwater deprived estuaries also displayed high species diversity and this was due to the higher incidence of marine straggler species in these systems. Salinity zones appeared to play a significant role in both species density and the presence or absence of species in both estuarine types. Mesohaline zones were found to be the most productive in terms of accumulator regions for larval stages.

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“…Closure occurs when a subaerial berm forms in the entrance channel. Closure can occur both seasonally (Wilson Inlet, Western Australia: Neira and Potter, ; Ranasinghe and Pattiaratchi, ) or irregularly throughout the year (Anglesea River, southeast Australia: McKenzie et al ., ). Entrance closure will then persist for days to years and is often associated with flooding and a deterioration in water quality of the enclosed lagoon (Jones and West, ; Gale et al ., ; O'Neill et al, ).…”

Section: Introductionmentioning

confidence: 98%

The daily‐scale entrance dynamics of intermittently open/closed estuaries

McSweeney

Kennedy

Rutherfurd

2017

Earth Surf Processes Landf

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Intermittently open/closed estuaries (IOCE) are a dynamic form of estuary characterised by periodic entrance closure to the ocean. Entrance closure is a function of the relative balance between on and offshore sediment transport with closures occurring during periods of low fluvial discharge whereby the estuary ebb‐tidal prism is reduced. Although the broad scale processes of entrance closure are becoming better understood, there remains limited knowledge on channel morphodynamics during an individual closure event. In this study, the entrance dynamics of three IOCE on the coast of Victoria, Australia, were monitored over a daily timescale following both artificial and natural openings. The influence of changing marine and fluvial conditions on the relative sedimentation rate within the entrance channel was examined. IOCE in Victoria showed two distinct modes of entrance closure: (a) lateral accretion, whereby the estuary gradually closes by longshore drift‐driven spit growth during low river flows; and (b) vertical accretion, where the channel rapidly aggrades under high (> 2 m), near‐normal waves. During storms, when fluvial discharge and wave heights simultaneously increase, large swells will not always close the mouth due to an increase in the ebb‐tidal prism. The estuary water depth and the maximum channel dimensions following opening were not proportional to the opening duration, with this being a function of the wave and fluvial conditions occurring following lagoon drainage. Based on the findings of this work, implementing a successful artificial entrance opening is dependent on reduced onshore sedimentation rates which occur when wave energy is low (< 2 m Hs) relative to river flow. Copyright © 2017 John Wiley & Sons, Ltd.

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Movement of larval fishes through the entrance channel of a seasonally open estuary in Western Australia

Cited by 53 publications

References 20 publications

Larval and juvenile fishes occurring with flood tides on an intertidal mudflat in the Tama River estuary, central Japan

Larval and juvenile fishes occurring with flood tides on an intertidal mudflat in the Tama River estuary, central Japan

The role of estuarine type in characterizing early stage fish assemblages in warm temperate estuaries, South Africa

The daily‐scale entrance dynamics of intermittently open/closed estuaries

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