scholarly journals Environmental effects of yellowtail kingfish aquaculture in South Australia

2010 ◽  
Vol 1 (2) ◽  
pp. 155-165 ◽  
Author(s):  
JE Tanner ◽  
M Fernandes
Keyword(s):  
Environmental Effects ◽  
South Australia ◽  
Yellowtail Kingfish

Are miners the bunnies or the bilbies of the rangelands?

2003 ◽  
Vol 25 (2) ◽  
pp. 172 ◽  
Author(s):  
J. L. Read
Keyword(s):  
Environmental Effects ◽  
South Australia ◽  
Economic Benefits ◽  
Environmental Research ◽  
Relative Area ◽  
Environmental Implications ◽  
Mining Operations ◽  
Consistent Treatment ◽  
Regional Conservation ◽  
Olympic Dam

In order to be preferred land-users of the Australian rangelands, mining operations should legacy net environmental, social and economic benefits in the regions that they operate. The positive and negative environmental implications of the Olympic Dam mine in arid South Australia are compared in this study. Criteria assessed include the relative area of affected v. improved landscape, environmental research, pest control and the facilitation of proactive conservation and sustainable diversification outcomes. A call is made for consistent treatment of potential environmental impacts across all rangeland users and the adoption of biodiversity trading to improve regional conservation outcomes. A challenge is issued to miners and other rangeland land-users to demonstrate that, like bilbies, their net environmental effects are beneficial.

Paradeontacylix godfreyi n. sp. (Digenea: Sanguinicolidae) from the heart of wild Seriola lalandi (Perciformes: Carangidae) in southern Australia

Zootaxa ◽  
2006 ◽  
Vol 1151 (1) ◽  
pp. 55 ◽  
Author(s):  
KATE S. HUTSON ◽  
IAN D. WHITTINGTON
Keyword(s):  
South Australia ◽  
Host Record ◽  
Morphological Characters ◽  
Intermediate Hosts ◽  
New Host ◽  
New Host Record ◽  
Yellowtail Kingfish ◽  
Seriola Lalandi

Paradeontacylix godfreyi n. sp. (Digenea: Sanguinicolidae) is described from the heart of wild yellowtail kingfish, Seriola lalandi Valenciennes, 1833, collected near Port Augusta, northern Spencer Gulf, South Australia. One specimen of P. godfreyi was also collected from the heart of a single wild specimen of S. lalandi captured near Killarney, Victoria. Paradeontacylix godfreyi is distinguished from other species in the genus by a combination of morphological characters including the shape and number of posterior tegumental spines, the number of rows of tegumental spines along the ventral body margin, the maximum number of marginal tegumental spines per row, the number of testes and the extent of the testicular field. Comparisons are made with a Paradeontacylix sp. collected from the heart of wild Samson fish, S. hippos Günther, 1876 from Greenly Island, South Australia and from the heart of wild S. lalandi from Killarney, Victoria. We also document a new host record for P. sanguinicoloides McIntosh, 1934 from the heart of wild S. hippos from Greenly Island, South Australia. The importance of determining potential intermediate hosts for Paradeontacylix species in relation to South Australian S. lalandi aquaculture is discussed.

Distinguishing aquaculture and wild yellowtail kingfish via natural elemental signatures in otoliths

2005 ◽  
Vol 56 (5) ◽  
pp. 693 ◽  
Author(s):  
Bronwyn M. Gillanders ◽  
Tanya C. Joyce
Keyword(s):  
Inductively Coupled Plasma ◽  
South Australia ◽  
Wild Fish ◽  
Inductively Coupled ◽  
Naturally Occurring ◽  
Significant Difference ◽  
Plasma Mass Spectrometry ◽  
Yellowtail Kingfish ◽  
Seriola Lalandi ◽  
High Degree

Naturally occurring elemental signatures (or composition) of otoliths may enable aquaculture and wild-caught yellowtail kingfish (Seriola lalandi) to be distinguished from one another, so that in the event of aquaculture escapes, escaped fish could be identified. Yellowtail kingfish were obtained from aquaculture ventures in three regions of Spencer Gulf and from nine areas external to aquaculture throughout the inner and outer Spencer Gulf, South Australia. Elemental signatures (Mg, Mn, Sr, Ba) of otoliths were analysed via LA-ICP-MS (laser ablation-inductively coupled plasma-mass spectrometry). A highly significant difference was detected between elemental signatures of the aquaculture and wild-caught fish, but this difference was largely attributable to wild fish from Port Augusta being different from the other groupings. For individual elements, it was difficult to detect differences between aquaculture and wild-caught fish, as there was considerable variation between locations within each group. When comparisons between aquaculture and wild fish were made of the inner and outer Spencer Gulf, aquaculture fish could be distinguished from wild fish and classified correctly with a high degree of accuracy (82–100%); the same level of accuracy was not achieved with wild fish. Comparison of elemental transects showed considerable variability between locations, with no features distinguishing aquaculture or wild-caught fish. It would be beneficial to combine naturally occurring signatures with other identification approaches (e.g. artificial elemental signatures) to accurately distinguish aquaculture from wild-caught fish. The impacts of escaped fish could then be determined.

Imaging molecules adsorbed onto electrodes under potential control by scanning probe microscopy

1991 ◽  
Vol 49 ◽  
pp. 376-377 ◽  
Author(s):  
N.J. Tao ◽  
J.A. DeRose ◽  
P.I. Oden ◽  
S.M. Lindsay
Keyword(s):  
Surface Charge ◽  
Environmental Effects ◽  
Scanning Probe Microscopy ◽  
Statistical Significance ◽  
Electrochemical Methods ◽  
Surface Structures ◽  
Scanning Probe ◽  
Potential Control ◽  
Afm Imaging ◽  
Special Circumstances

Clemmer and Beebe have pointed out that surface structures on graphite substrates can be misinterpreted as biopolymer images in STM experiments. We have been using electrochemical methods to react DNA fragments onto gold electrodes for STM and AFM imaging. The adsorbates produced in this way are only homogeneous in special circumstances. Searching an inhomogeneous substrate for ‘desired’ images limits the value of the data. Here, we report on a reversible method for imaging adsorbates. The molecules can be lifted onto and off the substrate during imaging. This leaves no doubt about the validity or statistical significance of the images. Furthermore, environmental effects (such as changes in electrolyte or surface charge) can be investigated easily.

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