ORCID Profile
0000-0001-5632-5996
Current Organisations
Commonwealth Scientific and Industrial Research Organisation
,
CSIRO
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Publisher: Inter-Research Science Center
Date: 1994
DOI: 10.3354/MEPS103111
Publisher: Inter-Research Science Center
Date: 21-01-2021
DOI: 10.3354/MEPS13540
Abstract: Penaeid prawns (shrimp) are short-lived and fecund, with a complicated life cycle that includes offshore spawning followed by a coastal or estuarine postlarval and juvenile phase. Factors affecting survival during the early life-history stages, and during movement between these stages, will affect variability in recruitment to the nursery ground, the offshore subadult and adult population, and, ultimately, catch. The inability to predict recruitment, and ultimately commercial offshore catch, has been complicated by an incomplete understanding of these factors. The reproductive dynamics of Penaeus ( Fenneropenaeus ) merguiensis were investigated by simultaneous adult and larval s ling on 66 lunar-monthly surveys from March 1986 to March 1992 in Albatross Bay, northeastern Gulf of Carpentaria, Australia. Egg production was seasonal, with the highest production from 6-mo-old newly recruited spawners, and another peak from 12mo-old spawners. Larval abundance (no. m -2 ) followed the same seasonal pattern as the abundance of eggs. However, interannual variation in egg and larval abundance was large, and there was a weak correlation between monthly egg and larval abundance. Larval abundance appeared to be further influenced by fluctuations in chlorophyll a concentration, a measure of food availability. There was evidence of a match/mismatch relationship between larval abundance and episodic chlorophyll increases. While there was no direct spawner (egg production)-fishery recruit relationship in P. merguiensis over the 6-yr study, there was a strong relationship between total larval abundance in spring and the size of the commercial catch 3 to 6 mo later. Therefore, factors affecting larval survival, including food availability, have significant implications for fishery production.
Publisher: Elsevier BV
Date: 07-1974
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/MF9940337
Abstract: Plankton s les from the Gulf of Carpentaria contained large numbers of the phyllosomata of Scyllarus martensii and an unknown scyllarid species (Scyllarus sp. A) and smaller numbers of the larvae of seven other scyllarid species (Thenus orientalis and six unidentified species of Scyllarus) and three palinurid species (Panulirus homarus homarus, P. versicolor and P. ornatus). The final phyllosoma stage of Scyllarus sp. A is described. The spatial and temporal variabilities of the more abundant scyllarid larvae are described and related to temperature, salinity and plankton biomass. Both S. martensii and Scyllarus sp. A were widespread in the deeper waters of the Gulf, living in a wide range of temperatures (21.7 to 30.3� C) and salinities (28.9 to 34.3). From the range of stages found on six cruises between April 1976 to March 1977, it appears that these two species reproduce throughout the year, although S. martensii had a broad peak period of reproduction from August to November 1976.
Publisher: Elsevier BV
Date: 07-1990
Publisher: Brill
Date: 1980
Publisher: Wiley
Date: 2015
DOI: 10.1890/13-2030.1
Abstract: A major decline in the catch of the banana prawn [shrimp], Penaeus ( Fenneropenaeus ) merguiensis , occurred over a six‐year period in the Weipa region of the northeastern Gulf of Carpentaria, Australia. Three main hypotheses have been developed to explain this decline: (1) prawn recruitment collapsed due to overfishing (2) recruitment collapsed due to a change in the prawn's environment and (3) adult banana prawns were still present, but fishers could no longer effectively find or catch them. Qualitative mathematical models were used to link population biology, environmental factors, and fishery dynamics to evaluate the alternative hypotheses. This modeling approach provides the means to rapidly integrate knowledge across disciplines and consider alternative hypotheses about how the structure and function of an ecosystem affects its dynamics. Alternative models were constructed to address the different hypotheses and also to encompass a ersity of opinion about the underlying dynamics of the system. Key findings from these analyses are that: instability in the system can arise when discarded fishery bycatch supports relatively high predation pressure system stability can be enhanced by management of fishing effort or stock catchability catch per unit effort is not necessarily a reliable indicator of stock abundance a change in early‐season rainfall should affect all stages in the banana prawn's life cycle and a reduced catch in the Weipa region can create and reinforce a shift in fishing effort away from Weipa. Results from the models informed an approach to test the hypotheses (i.e., an experimental fishing program), and promoted understanding of the system among researchers, management agencies, and industry. The analytical tools developed in this work to address stages of a prawn life cycle and fishery dynamics are generally applicable to any exploited natural resource.
Publisher: CSIRO Publishing
Date: 2009
DOI: 10.1071/MF08291
Abstract: The tropical Gulf of Carpentaria, Australia, has recently been identified as one of the world’s least impacted marine areas, presenting a unique opportunity to understand the nutrient drivers of productivity. The present study examined the nitrogen (N) sources and transformations in this pristine area and the role of N in fuelling primary productivity, principally based on summer data. The N budget estimates on a whole-of-Gulf basis suggest that river N inputs are unlikely to be major contributors to primary productivity. In the deeper waters of the Gulf, beyond the coastal boundary current, the main source of N is estimated to be N fixation by cyanobacteria, principally the abundant genus Trichodesmium. The present study measured high N fixation rates and depleted δ15N–N ratios in the particulate matter in the water column during a summer bloom. During summer, bottom N concentrations increased and δ15N–N ratios were depleted, suggesting that benthic mineralisation is occurring. It is therefore likely that detrital material from N-rich Trichodesmium is an important contributor to benthic processes. During winter, wind-driven mixing results in N from the bottom waters reaching the euphotic zone, and fuelling primary productivity. Therefore, Trichodesmium has an important direct and indirect role in contributing to primary productivity in this pristine tropical ecosystem.
Publisher: Hobart, Tas., CSIRO Marine and Atmospheric Research
Date: 2007
Publisher: CSIRO Publishing
Date: 1987
DOI: 10.1071/MF9870001
Abstract: The distribution and abundance in the Gulf of Carpentaria, Australia, of the three zoeal (= protozoeal) stages of Penaeus merguiensis, P. esculentus, P. semisulcatus, P. latisulcatus and P. longistylus are described. All species were largely coastal in distribution. The zoeae of P. semisulcatus were the most abundant and widespread penaeid larvae in the Gulf, with highest densities in the north-western and south-western areas. Those of P. merguiensis, the next most abundant, were found only in coastal areas in the north-eastern, north-western and southern Gulf. The larvae of P. esculentus and P. latisulcatus were next in abundance with largest numbers in the north-western and south-western Gulf and a small area of the north-eastern Gulf. Zoeae of P. longistylus were very rare and found only in the southern Gulf. The reproductive dynamics of these species have been inferred from the occurrence of the zoeal stages. All species showed a high degree of variation in reproductive activity throughout the year both the timing and relative heights of the peaks varied by species within and between geographic sub isions of the Gulf. Two seasonal peaks of reproduction were common in P. merguiensis, P. semisulcatus and P. latisulcatus in most areas, while single peaks were seen for P. esculentus and P. longistylus. No lunar periodicity of zoeal occurrence or reproduction was evident for any of these species. The spawning of P. merguiensis was in relatively shallow water, in as little as 10 m and generally less than 30 m P. semisulcatus had the deepest spawning depth, rarely less than 20 m but extending to 50 m and most commonly around 40 m.
Publisher: Inter-Research Science Center
Date: 2001
DOI: 10.3354/MEPS213241
Publisher: American Geophysical Union (AGU)
Date: 02-2019
DOI: 10.1029/2018EF000990
Publisher: Springer Science and Business Media LLC
Date: 08-09-2020
DOI: 10.1038/S41597-020-00625-9
Abstract: Zooplankton biomass data have been collected in Australian waters since the 1930s, yet most datasets have been unavailable to the research community. We have searched archives, scanned the primary and grey literature, and contacted researchers, to collate 49187 records of marine zooplankton biomass from waters around Australia (0–60°S, 110–160°E). Many of these datasets are relatively small, but when combined, they provide years of zooplankton biomass data for Australian waters from 1932 to the present. Data have been standardised and all available metadata included. We have lodged this dataset with the Australian Ocean Data Network, allowing full public access. The Australian Zooplankton Biomass Database will be valuable for global change studies, research assessing trophic linkages, and for initialising and assessing biogeochemical and ecosystem models of lower trophic levels.
Publisher: Springer Netherlands
Date: 2007
Publisher: CSIRO Publishing
Date: 1987
DOI: 10.1071/MF9870019
Abstract: The abundance of larvae of P. merguiensis, P. esculentus, P. semisulcatus and P. latisulcatus in the Gulf of Carpentaria shows both spatial and temporal heterogeneity. Most of the larvae of all four species were found where the water was less than 50 m deep, with temperatures and salinities greater than 26�C and 31 respectively. However, the mean temperatures of the waters in which the larvae were found varied significantly between some species. The mean temperatures and salinities of the waters was as follows: P. merguiensis 29.2�C, 32.3 P. esculentus 28.4�C, 33.1 P. semisulcatus 27.9�C, 33.2 P. latisulcatus 27.3�C, 33.0. While the range of temperatures in which all four species were found was between 21.5 and 30.6�C the ranges of salinities were more varied and may reflect the biogeographic distributions of the species. The three widespread species were found over large salinity ranges: P. merguiensis and P. semisulcatus, 27.8-34.9 and P. latisulcatus, 28.6-34.9. The Australian endemic, P. esculentus, was found in the most restricted range, 30.1-34.2. The temperatures and salinities of the waters in which the larvae were caught reflect conditions suitable for reproduction, as well as growth and survival of the larvae. The means of the temperature and salinity may be near larval optima and the ranges similar to tolerances. These differences should be taken into account when assessing abiotic influences on larval mortality both in the field and in culture.
Publisher: Oxford University Press (OUP)
Date: 1994
Publisher: Elsevier
Date: 2020
Publisher: CSIRO/ FRDC
Date: 2014
Publisher: Inter-Research Science Center
Date: 1992
DOI: 10.3354/MEPS086189
Publisher: Wiley
Date: 28-06-2012
Publisher: Inter-Research Science Center
Date: 1995
DOI: 10.3354/MEPS118255
Publisher: Elsevier BV
Date: 1992
Publisher: American Geophysical Union
Date: 1988
DOI: 10.1029/LN022P0273
Publisher: Springer Science and Business Media LLC
Date: 20-02-2018
Abstract: Chlorophyll a is the most commonly used indicator of phytoplankton biomass in the marine environment. It is relatively simple and cost effective to measure when compared to phytoplankton abundance and is thus routinely included in many surveys. Here we collate 173, 333 records of chlorophyll a collected since 1965 from Australian waters gathered from researchers on regular coastal monitoring surveys and ocean voyages into a single repository. This dataset includes the chlorophyll a values as measured from s les analysed using spectrophotometry, fluorometry and high performance liquid chromatography (HPLC). The Australian Chlorophyll a database is freely available through the Australian Ocean Data Network portal ( portal.aodn.org.au/ ). These data can be used in isolation as an index of phytoplankton biomass or in combination with other data to provide insight into water quality, ecosystem state, and relationships with other trophic levels such as zooplankton or fish.
Publisher: CSIRO Publishing
Date: 1996
DOI: 10.1071/MF9960157
Abstract: A 3-dimensional numerical circulation model was linked to four larval-postlarval behaviour patterns to establish the origins of postlarvae recruiting into the estuaries adjacent to Albatross Bay, Gulf of Carpentaria, Australia. The area from which these postlarvae originate is called the 'advective envelope' and it delimits the spatial extent of the effective spawning population. The different behaviour scenarios vary the amount of time the postlarvae are active during the flood tide and the depth at which they change between their diel and tidal activity patterns (transition depth). The envelope with a behaviour scenario that incorporated a 20 m transition depth and a 3 h tidal activity pattern was 1000 km2. Incorporation of seasonal winds changed the shape but not the extent of the advective envelopes.
Publisher: Wiley
Date: 2015
DOI: 10.1890/13-2030.1.SM
Publisher: Journal of Marine Research/Yale
Date: 08-1983
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/MF9940265
Abstract: To describe the influence of hydrology on the phytoplankton communites of the Gulf of Carpentaria, six phytoplankton parameters were measured on five transects: productivity, biomass, community structure, phospholipid-derived fatty acids, ratios of stable carbon isotopes and the relationship between photosynthesis and irradiance. The mean (�s.e.) estimate of depth-integrated phytoplankton productivity was 914�185 mgC m-2 day-' (n=9). In the shallow ( m) coastal waters, the productivity was 1430�400 mgC m-2 day-1 (n = 3). At the offshore stations (=30 m), it was 660 �108 mgC m-2 day-1 (n = 6). At both the shallow and the offshore stations, primary productivity was distributed equally between the phytoplankton size fractions 0.6-2.0�m and 10�m, with little in between. The highest rates of growth occurred within a very narrow light regime: self-shading limited growth in deeper water (at light intensities less than 125 mol s-1 m-2), and growth was photoinhibited in shallow water (at light intensities greater than 150 mol s-1 m-2). The resulting biomass-specific primary productivity (mgC mChla-1 day-1) maximum did not coincide with the depth of either the chlorophyll a maximum or the highest nutrient concentration. The natural carbon isotope ratio for the particulate matter showed that little land-derived carbon was exported beyond a narrow coastal fringe (about 10 to 20 km). The profiles of phospholipid fatty acids also showed that particulate organic matter was dominated by algal-derived compounds, which confirms that the bulk of the organic matter in the offshore Gulf of Carpentaria is of marine origin. Therefore, during the summer in this study, the stratified waters of the central gulf were both biologically and hydrologically independent of the coastal water and not influenced by terrestrial runoff. The phytoplankton production in the central gulf is maintained by nutrient supplies from internal sources, such as those that are remineralized in and resuspended from the sediment.
Publisher: Elsevier BV
Date: 12-2012
DOI: 10.1016/J.MARPOLBUL.2012.09.009
Abstract: We used a comparative approach to investigate the impact of the disposal of gold mine tailings into the ocean near the Lihir mine (Niolam Island, Papua New Guinea). We found abundance and ersity of zooplankton, micronekton and pelagic fish to be similar or higher in the mine region compared to the reference site. We also found relatively high trace metal concentrations in lower trophic level groups, especially zooplankton, near the mine discharge, but few differences in tissue concentrations of micronekton, baitfish and pelagic fish between the two regions. Biomagnification of some trace metals by micronekton, and of mercury by fish was evident in both regions. We conclude that ocean mine waste disposal at Niolam Island has a local impact on the smaller and less mobile pelagic communities in terms of trace metal concentrations, but has little effect on the abundance and bio ersity of the local food web.
Publisher: Oxford University Press (OUP)
Date: 1982
Publisher: University of Chicago Press
Date: 04-1983
DOI: 10.2307/1541145
Publisher: Elsevier BV
Date: 05-1999
Publisher: Elsevier BV
Date: 1995
Publisher: Springer Science and Business Media LLC
Date: 1979
DOI: 10.1007/BF00386591
Publisher: Wiley
Date: 11-2014
DOI: 10.1890/14-0697.1
Publisher: Elsevier BV
Date: 05-1998
Publisher: Inter-Research Science Center
Date: 1995
DOI: 10.3354/MEPS122159
Publisher: American Geophysical Union
Date: 1994
DOI: 10.1029/CE045P0235
Publisher: Oxford University Press (OUP)
Date: 1991
Location: Australia
No related grants have been discovered for Peter Rothlisberg.