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DAF works to achieve a productive and profitable agriculture, fisheries and forestry sector by promoting sustainability and innovation.

Phenotypic criteria for the identification of erythrocytic ruminant Anaplasma species has relied on subjective identification methods such as host pathogenicity (virulence for cattle or sheep) and/or the location of Anaplasma inclusion bodies within the host's red cells. Sequence comparisons of new and available GenBank Accessions were investigated to elucidate the relationships among these cl ...

SUBJECT: veterinary parasitology


Objective To evaluate the serological response of pigs receiving either the Porcilis APP vaccine or a modified live vaccine based on a streptomycin-dependent (SD) strain of Actinobacillus pleuropneumoniae, and then challenged with an Australian isolate of A pleuropneumoniae of either serovar 1 or 15 as a means of understanding the protection provided by both vaccines against serovar 1 but not ...

SUBJECT: swine; veterinary bacteriology


Water is a major expense when air-freighting live fish. However, reducing the volume of water relative to the amount of product usually results in more rapid water quality deterioration and higher mortality due to the higher concentration of excretory products in closed transport systems. The major water quality effects experienced by fish during transport are: low dissolved oxygen levels due ...

SUBJECT: transportation and storage; packing; fishery processing


Data from surveys of recreational anglers fishing on three estuaries in eastern Australia reveal highly skewed distributions of catches with many zeros. Such data may be analyzed using a two-component approach involving a binary (zero/non-zero catch) response and the conditionally distributed non-zero catches. A truncated negative binomial model was effective in analyzing the non-zero catches. ...

SUBJECT: fisheries; recreational fishing (angling etc)


Not all advances in the field of genetics are coming from sequencing entire genomes. “Genomic epidemiology” or population genetics is being used more and more in wild fisheries management. Harvesting of wild fisheries is the fifth largest export earner for the Queensland economy, and supports many regional communities. In desperation (almost!), fisheries managers have turned to this unconventi ...

SUBJECT: fishery management. fishery policy; fishery resources; genetics


This study focuses on replicated exploratory optimizations of a large and difficult beef herd dynamics model, using the net present value over a 10-year planning horizon as the variable of interest. Faced with a practical search-space of the order of 10100 possible management decision combinations, the thorough but slow search pattern of simulated annealing struggled, on average falling 1.2% s ...

SUBJECT: simulation modelling


Under controlled (28 °C and 12:12 photoperiod) freshwater recirculation conditions, two 48-tank (180 l) experiments tested the hypothesis that the dietary crude protein (CP) specification for Asian seabass could be reduced by increasing the dietary concentration of lipid. In Experiment 1, 384 fish (230 g initial bodyweight) were fed air-dry extruded diets of 38%, 42.5%, 47.3% and 52% CP in com ...

SUBJECT: fishery for individual species; fish culture


The effect of 1-methylcyclopropene (1-MCP) on shelf life and the ethylene sensitivity of detached leaves from six leafy asian vegetables (Chinese mustard, choy sum, garland chrysanthemum, mibuna, mizuna and tatsoi) commonly used in minimal processing was examined. All vegetables studied were significantly affected by the presence of 1 l/l ethylene. This reduction was primarily due to yellowing ...

SUBJECT: vegetables; harvesting; curing; storage


This paper describes the results of research examining the effect of dissolved organo-metallic complexes of copper (Cu) and zinc (Zn) from sewage sludge leachate on sorption by a humic-gley soil A-horizon, and the influence of such complexes on resultant sludge loading estimates. Sorption was described with Linear, Freundlich or Langmuir equations, and compared between a sample of sludge leach ...

SUBJECT: soils. soil science; science (general)


Photosynthetic characteristics of seagrasses measured by pulse amplitude modulation (PAM) fluorometry have demonstrated acute responses of seagrasses to short-term doses of high light irradiance, UV radiation, osmotic stress and desiccation. In this work, we use PAM fluorometry to examine photosynthetic rates of the seagrasses Zostera tasmanica and Zostera capricorni across a light gradient wi ...

SUBJECT: science (general); seagrasses