Sustainable tourism and forest conservation: The case of the Belum-Temengor Rainforest Complex in Perak,Malaysia     

Sai Ling Gwee  Suresh Narayanan 《Journal of Sustainable Forestry》2019,38(4):327-342

Ecotourism is a sustainable use of forest resources, as compared to traditional uses such as logging or mining. However, whether turning forests into tourist sites can generate incomes comparable to the lucrative traditional activities is less clear. We estimated the recreational values of the Belum-Temengor Rainforest Complex (BTRC) in Perak, Malaysia, and compared it with the alternative of one-time consumptive revenues from logging. Based on data from an on-site survey of 367 visitors to BTRC, direct non-consumptive use values were computed using the individual travel cost approach and the truncated Poisson count data model. The annual direct non-consumptive use value was RM14.66 million based on the estimated number of nights spent and willingness-to-pay per trip. The future cash flows of recreation demand were RM614 million, RM970 million, and RM1.86 billion for the next 30, 50, and 100 years, respectively. Own-price, cross-price, and income elasticities of recreation demand were also computed. Visitors’ on-site travel cost, alternative-site travel cost, income, ethnicity (Malay), and marital status (Single) were associated with recreation demand. Our main conclusion is that the direct non-consumptive use values from recreation demand and other indirect use and non-use values from forest conservation exceed the one-time consumptive revenues from logging.  相似文献   

Frequency of Cry1F resistance alleles in Spodoptera frugiperda (Lepidoptera: Noctuidae) in Brazil          下载免费PDF全文

Juliano R Farias  David A Andow  Renato J Horikoshi  Daniel Bernardi  Rebeca da S Ribeiro  Antonio RB do Nascimento  Antonio C dos Santos  Celso Omoto 《Pest management science》2016,72(12):2295-2302

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Reply     

RJ DOBSON  RB BESIER  EH BARNES  SCJ LOVE  K BELL  LF Le JAMBRE 《Australian veterinary journal》2002,80(7):438-438

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Electrocardiographic values of German shepherd dogs     

A REZAKHANI  RB ATWELL  J WEBSTER 《Australian veterinary journal》1990,67(8):307-309

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Harold Roger Spira BVSc, MRCVS, MACVS, HDA     

RB ATWELL 《Australian veterinary journal》1992,69(2):44-44

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Occurrence of cutaneous infections of Myxobolus episquamalis (Myxozoa: Myxobolidae) in sea mullet, Mugil cephalus L, in Australia     

JT ROTHWELL  JL VIRGONA  RB CALLINAN  PJ NICHOLLS  JS LANGDON 《Australian veterinary journal》1997,75(5):349-352

Objective To report the occurrence of Myxobolus episquamalis in sea mullet, Mugil cephalus L , caught in estuaries in eastern and western Australia.
Design A prospective study of commercial catches of mullet in the Clarence River of NSW and individual cases from other areas.
Results The organism caused pale, white to pink, raised lesions on the scales and fins of sea mullet. Occurrence of infection was highest in spring and in a marine (down-river) environment compared to a brackish environment. Up to 6% of fish were affected in commercial catches.
Conclusion The infection is widespread in Australian mullet, but rarely causes significant economic loss.  相似文献   

Distribution of lesions in ovine salmonellosis     

RB RICHARDS  RT NORRIS  ARB HIGGS 《Australian veterinary journal》1993,70(9):326-330

SUMMARY Four forms of salmonellosis were recognised in feedlots and during transport by sea: septicaemic, and acute, subacute and chronic enteric. The severity and distribution of lesions in the enteric forms varied according to the progression of the pathological process. The acute disease involved the abomasum and small intestine whereas the subacute disease centred on the lower small intestine and upper large intestine. Chronic disease involved considerable mucosal repair in the ileum, caecum and proximal colon. Septicaemic salmoneiiosis was often accompanied by acute enteritis and occasionally by cholecystitis. S typhimurium was the most frequently encountered serotype.  相似文献   

抗药性对球虫病流行病学的影响     

RB Williams  潘雪男 《国外畜牧学(猪与禽)》2006,(4):52-54

在艾美耳球虫感染的群体动力学、影响球虫病流行病学的因素和抗药性可导致家禽业经济损失的环境条件等方面,人们的知识仍显得不足(HD Chapman,1997). 人们对抗药球虫怀有巨大恐惧感已有很多年了,这主要是因为养禽业记得二十世纪六十年代后期抗吡啶酮或抗喹诺酮柔嫩艾美耳球虫病的灾难性爆发.  相似文献   

Olfactory responses to putative steroidal pheromones in allopatric and sympatric species of Mochokid catfish     

A. Narayanan  N.E. Stacey 《Fish physiology and biochemistry》2003,28(1-4):275-276

Electro-olfactogram studies of twelve Mochokid catfish species showed that detection of steroids is similar among sympatric species but different among allopatric species.  相似文献   

Larvae and early post-larvae of Penaeus monodon (Fabricius) experimentally infected with white spot syndrome virus (WSSV) show no significant mortality   总被引：3，自引：0，他引：3  

Yoganandhan K  Narayanan RB  Sahul Hameed AS 《Journal of fish diseases》2003,26(7):385-391

The pathogenicity of white spot syndrome virus (WSSV) was tested with different developmental stages of Penaeus monodon, i.e. nauplius, protozoeae, mysis, early post-larvae (PL1-10), late post-larvae (PL11-20) and juveniles. WSSV challenge was done by immersion and oral routes. No disease occurred in the larvae and early post-larvae but they were positive for WSSV by nested polymerase chain reaction (PCR) assay. Significant mortality was observed in late post-larvae and juveniles and both single and nested PCR assays gave positive results with these samples. The results demonstrated that WSSV virulence in P. monodon increases with advancing stages of development and that WSSV infection does not result in disease for larvae and post-larvae younger than PL10.  相似文献