A review of the conservation threats to carnivorous plants     

David E. Jennings  Jason R. Rohr 《Biological conservation》2011,(5):1356-1363

Over half of the carnivorous plant species assessed by the International Union for the Conservation of Nature (IUCN) are listed as threatened (i.e. vulnerable, endangered, or critically endangered), but the threats to carnivorous plants have not previously been quantified systematically. In this review, we quantify the conservation threats to carnivorous plant taxa worldwide. Using the IUCN Red List, a literature search of Web of Knowledge, and the National Red Lists database, we collected data on the threats to 48 species of carnivorous plants from nine genera. The most common threat was habitat loss from agriculture, followed by the collection of wild plants, pollution, and natural systems modifications. A principal coordinate analysis revealed that species within a genus often faced similar threats, and an indicator species analysis found positive associations among species in the genus Sarracenia and agricultural activities, over-collection, invasive species, and pollution. Future research should further quantify the effects of pollution on carnivorous plants, and more thoroughly examine the potential role of carnivorous plants as indicator species for wetland health. More research is also needed to quantify the extinction risk for many carnivorous plants, as presently only around 17% of species have been assessed by the IUCN. Ensuring the conservation of carnivorous plants will help maintain the important ecosystem services they provide and prevent secondary extinctions of specialist species that rely on them.  相似文献   

A comparison of analytical methods for chlorodibenzo-p-dioxins in pentachlorophenol.     

E C Villanueva  R W Jennings  V W Burse  R D Kimbrough 《Journal of agricultural and food chemistry》1975,23(6):1089-1091

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Controlling microbial contamination on beef and lamb meat during processing   总被引：2，自引：0，他引：2  

PR WIDDERS  KJ COATES  S. WARNER  JC BEATTIE  IR MORGAN  MW HICKEY† 《Australian veterinary journal》1995,72(6):208-211

SUMMARY The microbiological quality of carcases, meat and environmental surfaces was evaluated in commercial boning rooms processing beef and lamb. There was considerable variation in the level of microbial contamination on both carcases and meat, with counts ranging from less than 20 to 10⁸/cm² on carcases and to 2 times 10⁷/cm² on meat. The level of microbial contamination on meat was influenced by the level of carcase contamination at boning and by the boning process itself. Carcase contamination was the major determinant of microbiological quality, as more than 70% of carcases had microbial counts greater than 10³/cm². Cutting boards were a major source for microbial dissemination during boning, particularly when carcase counts were less than 10³/cm². If carcases were heavily contaminated, the contamination of processing surfaces was irrelevant in determining microbial loads on meat. Where carcase contamination was at low to moderate levels, the contribution of the boning process to the contamination on meat assumed increased significance. Under these conditions, improved sanitation of cutting surfaces in the boning room resulted in a significant reduction in microbial contamination on the surface of meat. These results can form the basis for ensuring that improvements made in carcase management before boning, to improve microbiological quality, will be preserved through attention to cutting board hygiene during boning.  相似文献   

MONITORING THE TRAUMA PATIENT     

Paul B. Jennings V.M.D.  M.Sc. 《Veterinary surgery : VS》1974,3(2):77-78

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Organophosphorus poisoning: A comparative study of the toxicity of carbophenothion to the Canada goose,the pigeon and the Japanese quail     

Derek M. Jennings  Peter J. Bunyan  Peter M. Brown  Peter I. Stanley  Frank J. S. Jones 《Pest management science》1975,6(3):245-257

The acute single dose oral toxicity of carbophenothion (S-4-chlorophenylthiomethyl OO-diethyl phosphorodithioate) has been determined in Canada geese (Branta canadensis), pigeons (Columba livia) and Japanese quail (Coturnix coturnix japonica). At post mortem examination gross pathological changes were observed in Canada geese and pigeons and esterase levels were determined by conventional and electrophoretic methods on extracts of liver and brain from these two species. Carbophenothion residue levels were determined in liver, brain and gizzard contents from the geese and pigeons. The overall pattern of results suggests that esterase inhibition may not be the dominant factor in carbophenothion poisoning in geese. It is suggested that a brain carbophenothion residue level of 1 part/10⁶ is indicative of death by poisoning in geese.  相似文献   

Immunosuppression in bovine trypanosomiasis: Field studies using foot-and-mouth disease vaccine and clostridial vaccine     

J. M. Scott  R. G. Pegram  P. H. Holmes  T. W. F. Pay  P. A. Knight  F. W. Jennings  G. M. Urquhart 《Tropical animal health and production》1977,9(3):159-165

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The influence of preplanting dips and postplanting temperatures on root growth and development of nonprecooled tulips,daffodils and hyacinths     

Nancy T. Jennings  A.A. De Hertogh 《Scientia Horticulturae》1977,6(2):157-166

The effects of preplanting dips and postplanting temperatures were studied, using nonprecooled bulbs of Tulipa gesneriana L. ‘Paul Richter’, Narcissus pseudonarcissus L. ‘Explorer’ and Hyacinthus orientalis L. ‘Pink Pearl’, for 2 consecutive years. Preplanting treatments consisted of a non-dip control, and 30-min dips of either tap water or benomyl—ethazol. After planting, the tulips and daffodils received temperatures of 5, 9, 13, 17 or 21° C for a 5-week period. Hyacinths received temperatures of 9, 13, 17, 21, 25, 29 or 33° C for 5 weeks in the first year and for 25 days in the second year.It was determined that 17° C for 3 weeks and 17° C for 3–4 weeks were the optimal temperatures and periods of time for root development of tulips and daffodils, respectively. For hyacinths, a range of from 17 to 25° C for 10–14 days was optimal. Under these conditions, a minimum root length of 70 mm was obtained and all bulbs of each species had rooted.The benomyl-ethazol and water preplanting dips stimulated root growth for the first 2 weeks for tulips. This effect was not observed for daffodils and hyacinths.  相似文献   

Transplantation of bovine squamous cell carcinoma into congenitally athymic nude mice     

D Hoffmann  P A Jennings  P B Spradbrow 《The Veterinary record》1977,101(19):384-385

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Encephalitis in horses in Hillsborough County, Florida, 1964   总被引：1，自引：0，他引：1  

W L Jennings  R A Kathein  A L Lewis  J O Bond 《American journal of veterinary research》1967,28(125):965-970

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USE OF ANTIBIOTICS IN THE TREATMENT OF SHOCK     

P.B. Jennings V.D.M.  M.Sc. 《Veterinary surgery : VS》1977,6(1):31-35

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