scholarly journals Gum Production and its Sustainable Harvest from Forest: a Review

2021 ◽  
Vol 8 (01 _ Sp 1) ◽  
Author(s):  
Tapas Paramanik ◽  
◽  
Shantanu Bhattacharyya ◽  
Keyword(s):  
2021 ◽  
Vol 129 ◽  
pp. 105355
Author(s):  
Cinthia Carolina Abbona ◽  
Gustavo Neme ◽  
Jeff Johnson ◽  
Adolfo Gil ◽  
Ricardo Villalba ◽  
...  

2009 ◽  
Vol 18 (9) ◽  
pp. 2263-2281 ◽  
Author(s):  
Paul F. Cannon ◽  
Nigel L. Hywel-Jones ◽  
Norbert Maczey ◽  
Lungten Norbu ◽  
Tshitila ◽  
...  

Author(s):  
Christian J. Rivera ◽  
Suzanne K. Macey ◽  
Mary E. Blair ◽  
Eleanor J. Sterling

2020 ◽  
Vol 67 (2) ◽  
Author(s):  
N. Aswathy ◽  
R. Narayanakumar ◽  
Shyam S. Salim ◽  
Prathibha Rohit ◽  
A. Gopalakrishnan

The Indian oilsardine Sardinella longiceps (Valenciennes, 1847) is a significant contributor to the marine fisheries economy of India. The species showed wide fluctuations in landings in the past and during recent years, the decline in landings is an issue of concern for sustainable harvest of the resource especially in the context of climate change regime. The paper analysed the economic impacts of fluctuations in oilsardine landings in terms of gross earnings realised at landing centre and retail levels; inflation in the domestic markets and external trade during the 2000-2018 period. The analysis indicated that the decline in landings was more in the state of Kerala as compared to all India landings. The inflation at point of first sales (landing centre level) was more during 2000-09 period whereas at retail market level inflation was highest during 2010-2018. The inflationary pressure on domestic consumers in Kerala was more during 2010-2018 period. The growth in external trade of sardines was in tune with the Indian oilsardine landings in the country.


Author(s):  
Ralph J. Alig ◽  
Darius M. Adams ◽  
John T. Chmelik ◽  
Pete Bettinger

Oryx ◽  
2014 ◽  
Vol 48 (3) ◽  
pp. 420-429 ◽  
Author(s):  
Megan Tierney ◽  
Rosamunde Almond ◽  
Damon Stanwell-Smith ◽  
Louise McRae ◽  
Christoph Zöckler ◽  
...  

AbstractThe unsustainable use of wild animals and plants is thought to be a significant driver of biodiversity loss in many regions of the world. The international community has therefore called for action to ensure the sustainable use of living resources and safeguard them for future generations. Indicators that can track changes in populations of species used by humans are essential tools for measuring progress towards these ideals and informing management decisions. Here we present two indicators that could be used to track changes in populations of utilized vertebrate species and levels of harvest sustainability. Preliminary results based on sample data both at the global level and for the Arctic show that utilized species are faring better than other species overall. This could be a consequence of better management of these populations, as indicated by more sustainable harvest levels in recent decades. Limitations of the indicators are still apparent; in particular, there is a lack of data on harvested populations of some vertebrate classes and from certain regions. Focusing monitoring efforts on broadening the scope of data collected and identifying interactions with other potential drivers of decline will strengthen these indicators as policy tools and improve their potential to be incorporated into future sets of indicators to track progress towards global biodiversity targets.


2011 ◽  
Vol 62 (12) ◽  
pp. 1395 ◽  
Author(s):  
Cindy A. Tribuzio ◽  
Gordon H. Kruse

Demographic models are useful tools for assessing data-limited species and may be an appropriate alternative to cohort analyses for sharks due to their long-lived, slow-growing nature. In this study, age- and stage-based demographic analyses were conducted to examine the intrinsic rebound potential (r) and potential risk of fishing for spiny dogfish (Squalus suckleyi) in the Gulf of Alaska. Monte Carlo simulations were conducted to incorporate input parameter uncertainty. For an unfished population, r was estimated to be 0.02–0.03 year–1. Fishing mortalities (F) of F = 0.04 and 0.03 (age- and stage-based models respectively), resulted in r = 0, indicating that populations fished at higher F are not sustainable. Harvest strategies targeting juveniles (age-based model) and subadults (stage-based model) caused the highest risk of the population falling below defined thresholds (BMSY, B40% and B50%) after 20 years. The age- and stage-based models provided similar estimates of r and sustainable fishing mortality, suggesting that the stage-based model is an appropriate substitute for the age-based model in this case. S. suckleyi and the closely related S. acanthias are often harvested around the world and this modelling approach could be useful to the management of these species and other sharks where data is limited.


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