Listing may not achieve conservation: A call for proactive approaches to threatened species management     

Lea T. Mamo  Melinda A. Coleman  Patrick G. Dwyer  Brendan P. Kelaher 《水产资源保护:海洋与淡水生态系统》2020,30(3):611-616

1. Species listing and subsequent conservation efforts are dependent on a number of political, social, and scientific factors, often to the disadvantage of uncharismatic taxa, such as small, cryptic, and rare species, and those that lack commercial value.
2. This case study examined the listing, impact assessment and conservation process of the critically endangered marine seaweed Nereia lophocladia (Nereia hereafter), which is a small and sporadically occurring species.
3. Nereia was initially listed as vulnerable, and upgraded to critically endangered, following the precautionary principle. Despite the elevation of its listing and the existence of a recovery plan, little conservation effort was devoted to Nereia.
4. A major upgrade to a large breakwater adjacent to Nereia's only known location triggered legislation and targeted searches for the species. Once found at the site, adaptive management actions, including modifications to the breakwater and some of the first targeted scientific surveys for this species took place.
5. The targeted surveys quickly revealed a far greater population of Nereia with a broader distribution than was previously realized. Given this, the breakwater upgrade probably caused less extinction risk to Nereia than predicted and a costly redesign may not have been necessary to secure the species' survival.
6. The case study argues for a proactive, evidentiary approach to species conservation, where conservation actions should be initiated as soon as species are listed and not when an immediate risk of extinction arises. Such approaches would improve conservation efforts and may also reduce the overall costs of saving species

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Chemical immobilisation and satellite tagging of free‐living southern cassowaries     

HA Campbell  RG Dwyer  S Sullivan  D Mead  G Lauridsen 《Australian veterinary journal》2014,92(7):240-245

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Faecal PCR panel results and clinical findings in Western Australian dogs with diarrhoea     

MW Kim  CR Sharp  CJ Boyd  LN Twomey 《Australian veterinary journal》2020,98(11):563-569

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Research at the University of Kentucky: Rotavirus vaccination in foals     

Dr Roberta Dwyer 《Journal of Equine Veterinary Science》2004,24(3)

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Heart rate as a measure of adaptation to stress in cattle   总被引：1，自引：0，他引：1  

CJ COOK  LH JACOBSON 《Australian veterinary journal》1996,74(6):471-472

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Effects of Population Density and Planting Pattern on the Yield and Yield Components of Leafy Reduced-Stature Maize in a Short-Season Area     

S. H. Begna  R. I. Hamilton  L. M. Dwyer  D. W. Stewart  D. L. Smith 《Journal of Agronomy and Crop Science》1997,179(1):9-17

Maize hybrids that yield well, mature earlier with low grain moisture contents, tolerate higher population densities and take advantage of narrow row spacings better than the currently available hybrids would be more suitable for production in short-season areas. Leafy reduced-stature maize hybrids, which have only recently been developed, have traits which address these criteria. The objective of this study was to evaluate the effects of different population densities (65 000 and 130000 plants ha^?1) and planting patterns (single rows 76 cm apart and paired rows with 20 cm between rows within a pair of 56 cm between rows of adjacent pairs) on the yield and yield components of two leafy reduced-stature (LRS1 and LRS2), one non-leafy reduced-stature (NLRS), and two conventional corn hybrids (Pioneer 3979, < 2500 CHU; and Pioneer 3902, 2600-2700 CHU) at two locations. All hybrids had higher kernel numbers per row and single plant grain yields at the lower population densities when in paired rows. However, as plant density increased, these variables decreased more in the conventional hybrids than the LRS and NLRS hybrids, which demonstrates the greater tolerance of the latter to the stresses associated with higher plant densities. Grain yield was higher for the two LRS hybrids and the NLRS hybrid at 130000 plants ha^?1 than 65 000 plants ha^?1 Grain yield of conventional hybrids was reduced at the higher population density. The LRS hybrids matured before both conventional hybrids and out yielded Pioneer 3979 at the higher plant population density in both row spacings at both sites. Harvest index was not affected by population density and this value was not different among the NLRS and conventional hybrids. However, the harvest index of the LRS hybrids was greater than the others. LRS and NLRS hybrids had lower moisture contents and earlier maturities than conventional hybrids. Rapid growth of the first ear and higher harvest index values might are indications that LRS hybrids are more tolerant of higher population densities than the conventional hybrids.  相似文献   

Factors associated with the effectiveness of antibiotic treatment for ovine virulent footrot     

D. JORDAN  JW PLANT†  HI NICOL‡  TM JESSEP  CJ SCRIVENER 《Australian veterinary journal》1996,73(6):211-215

Factors associated with the proportion of sheep cured of virulent footrot after antibiotic treatment were studied in a field trial under dry environmental conditions. From 2 similar flocks, 1091 Merino sheep weighing about 50 kg and infected with virulent footrot received an intramuscular injection of either 12 mL of a mixture of penicillin (250 mg/mL) and streptomycin (250 mg/mL), 6 mL of long acting oxytetracycline (200 mg/mL) or 6 mL of a mixture of lincomycin (50 mg/mL) and spectinomycin (100 mg/mL). Variables that were significantly associated with the proportion of sheep cured were: the type of antibiotic used, the number of feet infected and the flock from which the sheep came. There was an interaction between antibiotic type and number of feet infected and between antibiotic type and flock in association with the proportion of sheep cured. The extent of paring and the occurrence of blowfly strike in footrot lesions treated with diazinon had no significant association with the proportion of sheep cured.  相似文献   

Perennial ryegrass staggers in fallow deer (Dama dama)     

PJ MITCHELL  CJ McCAUGHAN 《Australian veterinary journal》1992,69(10):258-259

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An Anticoagulant for Transport of Bovine Blood          下载免费PDF全文

V.E. Valli  B.J. McSherry  G.E. Fountain  L. Friesen  P. Dwyer    C.M. Forsberg 《The Canadian veterinary journal. La revue veterinaire canadienne》1980,21(9):252-256,257

Various anticoagulant were assessed in order to develop a transport media for bovine blood which would improve leukocyte stability. The effects of time, disease in the donor and different personnel and laboratory equipment were also tested.

The transport media most effective for leukocyte stability was found to be Titriplex IV. This is a modification of Titriplex I by the inclusion of acetylsalicyclic acid to prevent cellular clumping and by the removal of methylene blue. Anticoagulant citrate dextroseformalin-ASA performed equally well for transport but cellular morphology was impaired.

Febrile or neoplastic disease in the donor animal did not alter the efficiency of the formalin containing anticoagulants.

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Is a purpose of REM sleep atonia to help regenerate intervertebral disc volumetric loss?     

Jerome CJ Fryer 《Journal of circadian rhythms》2009,7(1):1-5

The nature of atonia in sleep continues to be enigmatic. This article discusses a new hypothesis for complete core muscle relaxation in REM sleep, suggesting a bottom-up recuperative perspective. That is, does the atonia in REM sleep provide a utility to help restore the mechanobiology and respective diurnal intervertebral disc hydraulic loss? By combining the effects of gravity with current compressive concepts in spinal stability, this article looks at vertebral approximation as a deleterious experience with an intrinsic biological need to keep vertebrae separated. Methods using polysomnography and recumbent MRI are discussed.  相似文献