Mangroves are considered to support rich assemblages of fish and invertebrates. Fishes inhabiting mangrove habitats and at various distances from mangroves across mudflats were sampled to: (1) compare fish assemblages between habitats; and (2) determine the influence of mangrove proximity on fish abundance and diversity in three southern Australian estuaries between November 2005 and January 2006. Based on their distribution, fish species were classified as mangrove residents, mudflat residents, generalists or rare species. The assemblage structure of fish in mangroves differed from assemblages 500m away; however, neither total abundance nor species richness differed significantly between mangroves and mudflats. Mangrove residents and Aldrichetta forsteri (yellow-eyed mullet) displayed strong associations with mangrove habitats, whereas mudflat residents were associated with mudflat habitats. No other fish groups or individual species occurred in higher abundances in either habitat. Total fish abundance, mangrove residents and A. forsteri were positively correlated with pneumatophore density, indicating that the structural complexity of the mangroves might influence the distributions of certain fish species. The current study demonstrated that mangrove habitats in temperate Australia support no greater abundance or diversity of fish than adjacent mudflat habitats and that mangrove proximity does not influence fish distribution at a habitat scale.

Fish larvae were sampled along a five-station transect extending from inshore (18m depth) to offshore waters (1000m depth) of the coast of South-Western Australia (see thumbnail). 148 taxa from 93 teleost families were identified. The temporal and spatial structure of the fish assemblages were analysed in relation to the environmental variables. Assemblages were closely correlated to water masses (Capes and Leeuwin Current)

In February and June 1983, fishes and benthic fauna were sampled to provide quantitative estimates of densities and volumes of the benthic invertebrate animals and biomass of the seagrass in summer, as well as abundances of the fishes occurring during the day and night and in both summer and winter in Amphibolis seagrass beds and sand flats at Monkey Mia Shark Bay, Western Australia.

Measures of abalone biology - length, weight, growth rate in the Spencer Gulf, South Australia.

A three-pronged approach was taken to quantify patterns of abundance and coexistance at small (centimetres) to very large (hundreds of kilometres) spatial scales. This was through a 'spatio-temporal survey' (tested hypotheses about spatial and temporal variation in abundances along < 40 km of coastline and over 26 months), 'large-scale survey' (tested hypotheses about spatial variation in a hierarchical design along > 400 km of coastline) and 'nearest-neighbour study' (tested a hypothesis about the spatial segregation of individual sea urchins at several places on one reef).

This report describes the results of the first of three expeditions planned to the Kimberley to document the marine flora and fauna of the area. The expedition took place in November 1994 with the assistance of a grant from the National Estates Grant Program.Twenty-two stations were examined. Detailed notes are presented on the station locations and habitat types present. At each station seagrasses, algae, fish, and some invertebrate groups were collected and notes were made on mangroves in the area.Three areas of particular significance were found: the intertidal seagrass beds in the area of Sunday and Tallon Islands, which are the largest known for the Kimberley region; an extensive intertidal system which surrounds Montgomery Island with an area greater than 400 square kilometres; and a hypersaline lagoon on Macleay Island. These areas are described and the reasons for their significance detailed.This report provides an extensive section outlining the coastal geomorphology of the southern Kimberley islands, emphasising the unique intertidal terraces which trap water at low tide and have allowed the development of the seagrass systems at Sunday and Tallon Islands.There have been no published records of the marine algae which occur in the Kimberley. This report provides details of 72 species collected during the expedition. Coralline algae are poorly known and species in this group are currently being worked on taxonomically. Two genera commonly found during the trip are provisionally considered to be undescribed and two species are new records for Western Australia. Eight species of seagrasses were recorded from a total of 15 stations; the number of known localities at which the most common species occurs has been trebled.Two hundred thirty-two species of molluscs, 173 crustaceans, 24 polychaetes,and 197 species of fish were recorded. Potentially new species were found in several groups. Detailed collections were made of additional groups such as echinoderms. The first collections from the Kimberley were obtained of groups such as isopods and nemerteans.The taxonomy of many of the groups collected is poorly known. Material was obtained for specialists in particular groups in Australia and overseas. The material has been sorted and sent to the specialists for examination and determination of species. This work is complex and time consuming, so it has not been possible to provide identifications for this report. However, the material is currently being worked up and will be presented in the scientific literature when it has been completed.

The major gap in the surveys of the shallow water marine fauna of Western Australia is the Kimberley region. The Kimberley is a vast expanse of land in the northeastern corner of Western Australia, the closest point of which is some 2600 km from Perth by air. The area is sparsely inhabited and there are few roads. Access to the coast is largely by sea. The coastal towns of Derby and Wyndham in the Kimberley are small, with less than five thousand people each, and are separated by a distance of over 2000 km along the coast; there are no coastal settlements between Derby and Wyndham. The marine invertebrate fauna of the Kimberleys is virtually unknown. In 1976 the Western Australian Museum and Field Museum of Natural History mounted a major expedition to the Kimberley which was centered on the Mitchell Plateau-Admiralty Gulf area, one of the few coastal localities accessible from shore. The work undertaken was primarily terrestrial (Anon, 1981) but included two studies of marine molluscs (Wells, 1981; Wells and Slack-Smith, 1981). The Admiralty Gulf area is thus the only part of the Kimberley from which any substantial marine invertebrate collections have been made, and these are restricted to molluscs. The second goal of the 1988 expedition was thus to survey the marine invertebrate fauna of the Kimberleys to obtain specimens for the permanent collections. A subsidiary goal was to develop a knowledge of working in this remote area with a view to selecting areas for future work if funding and a vessel can be obtained.

Quantitative samples of the macrofauna from three seagrass species, Posidonia australis, Posidonia sinuosa and Amphibolis antarctica, and nearby non-vegetated area were collected from three sites within Princess Royal Harbour in January 1998. The structure and composition of the macrofaunal communities in these habitats were described.