The divergent environmental characteristics of permanently-open, seasonally-open and normally-closed estuaries of south-western Australia

Chuwen, Benjamin M.; Hoeksema, Steeg D.; Potter, I. C.

doi:10.1016/j.ecss.2009.03.030

Cited by 30 publications

(20 citation statements)

References 32 publications

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“…In a geotectonicmorphological context, one of the most widely used classifi cations that fulfills the criterion of simplicity is the one proposed by Fairbridge (1980; cf. Many researchers (e.g., Day, 1981;Potter et al, 1993;Roy et al, 2001;Rustomji, 2007;Chuwen et al, 2009;Taljaard et al, 2009) would object to such a proposition. Perillo (1995a) proposed a modified version of this by distinguish ing between so-called 'primary estuaries' and 'secondary estuaries'.…”

Section: Classification Of Estuariesmentioning

confidence: 99%

Geology, Morphology, and Sedimentology of Estuaries and Coasts

Flemming

2011

Treatise on Estuarine and Coastal Science

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Section: Classification Of Estuariesmentioning

confidence: 99%

Geology, Morphology, and Sedimentology of Estuaries and Coasts

Flemming

2011

Treatise on Estuarine and Coastal Science

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“…The poor representation of marine species in Wilson Inlet and particularly in 2007 can be attributed to its mouth being atypically closed for the majority of the study (Chuwen et al, 2009b), and to the fact that, when briefly open, the channel scoured through the sand bar at the mouth was narrow and shallow. This paralleled the situation in an eastern Australian estuary in which the very brief and restricted opening of its mouth provided limited opportunities for marine fishes to enter (Griffiths, 2001).…”

Section: Article In Pressmentioning

confidence: 99%

Comparisons between the characteristics of ichthyofaunas in nearshore waters of five estuaries with varying degrees of connectivity with the ocean

Hoeksema

Chuwen

Potter

2009

Estuarine, Coastal and Shelf Science

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. M A N U S C R I P T A C C E P T E D ARTICLE IN PRESS

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“…The estuaries along the microtidal coast of south‐western Australia typically contain a short and narrow entrance channel, a large central basin area and the saline lower reaches of their tributaries (Hodgkin & Lenanton, 1981; Potter et al , 2010). Many of these systems become closed to the ocean, either seasonally or for longer periods, through the formation of sand bars at their mouths (Hodgkin & Hesp, 1998; Chuwen et al , 2009 a ; Potter et al , 2010). The combination of a seasonal barrier to the sea and relatively benign environmental conditions for much of the year helps account for the presence of a number of fish species that can complete their life cycles within these systems (Potter & Hyndes, 1999; Chuwen et al , 2009 b ; Hoeksema et al , 2009).…”

Section: Introductionmentioning

confidence: 99%

Implications of the divergent use of a suite of estuaries by two exploited marine fish species

Potter

Chuwen

Hesp

et al. 2011

Journal of Fish Biology

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Biological characteristics of the marine species King George whiting Sillaginodes punctatus and Australian herring Arripis georgianus in three seasonally open estuaries (Broke, Irwin and Wilson Inlets), one permanently open estuary (Oyster Harbour) and one normally closed estuary (Wellstead Estuary) on the south coast of Western Australia have been determined and compared. Sillaginodes punctatus enters the seasonally and permanently open estuaries early in life and reaches total lengths (L(T)) >280 mm at which it can be legally retained and thus contributes to commercial and recreational fisheries in these systems. This sillaginid almost invariably emigrates from these estuaries before reaching its typical size at maturity (L(T50)) and does not return after spawning in marine waters. In contrast, virtually all female A. georgianus (≥ 98%) in the three seasonally open estuaries and the majority in the normally closed (89·5%) and permanently open estuaries (83%) exceeded the L(T50) of this species at maturity, reflecting the fact that the nursery areas of this species are predominantly located much further to the east. Although adult females of A. georgianus in seasonally open and normally closed estuaries had developed mature ovaries by autumn, at which time they were prevented from migrating to the sea by closure of the estuary mouths, this species did not spawn in those estuaries. The oocytes in their ovaries were undergoing extensive atresia, a process that had been incipient prior to oocyte maturation. As the adult females of A. georgianus in the permanently open Oyster Harbour at this time all possessed resting gonads, i.e. their oocytes were all previtellogenic, the adults that were present in that estuary earlier and were destined to spawn in autumn must have emigrated from that permanently open estuary to their marine spawning areas prior to the onset of gonadal recrudescence. The body masses at length of A. georgianus, which were almost invariably higher in summer and autumn than in winter and spring, were greater in the very productive environments of the seasonally open and normally closed estuaries than in the less productive and essentially marine environment of Oyster Harbour and coastal marine waters. In general, the same pattern of differences between water bodies was exhibited by the growth of A. georgianus and by the more restricted data for body mass at L(T) and growth of S. punctatus. Despite an increase in anthropogenic activities in Wilson Inlet over the last two decades, the growth of both species was very similar to that recorded 20 years earlier. The fisheries implications of the results for the two species are discussed.

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The divergent environmental characteristics of permanently-open, seasonally-open and normally-closed estuaries of south-western Australia

Cited by 30 publications

References 32 publications

Geology, Morphology, and Sedimentology of Estuaries and Coasts

Geology, Morphology, and Sedimentology of Estuaries and Coasts

Comparisons between the characteristics of ichthyofaunas in nearshore waters of five estuaries with varying degrees of connectivity with the ocean

Implications of the divergent use of a suite of estuaries by two exploited marine fish species

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