نتایج جستجو برای: overexploitation

تعداد نتایج: 943  

2014
Hans Raj Sandeep Yadav N. S. Bisht

A comprehensive account of the status of rattans found in the north-east region of India is presented here. Out of the 600 species found worldwide, a total of 20 species of rattan are found in North-East India. Rattan is inseparably attached with the tradition and culture of tribal people of the North-Eastern region. Since antiquity, people of this region have used to make many articles of dail...

Journal: :Science 2009
Boris Worm Ray Hilborn Julia K Baum Trevor A Branch Jeremy S Collie Christopher Costello Michael J Fogarty Elizabeth A Fulton Jeffrey A Hutchings Simon Jennings Olaf P Jensen Heike K Lotze Pamela M Mace Tim R McClanahan Cóilín Minto Stephen R Palumbi Ana M Parma Daniel Ricard Andrew A Rosenberg Reg Watson Dirk Zeller

After a long history of overexploitation, increasing efforts to restore marine ecosystems and rebuild fisheries are under way. Here, we analyze current trends from a fisheries and conservation perspective. In 5 of 10 well-studied ecosystems, the average exploitation rate has recently declined and is now at or below the rate predicted to achieve maximum sustainable yield for seven systems. Yet 6...

Journal: :Institutions and economies 2023

At present, public consciousness on respecting and safeguarding the environment is declining rapidly. On that note, this study assumes growing tourism has negative environmental implications. To satisfy demand, overconsumption, overexploitation through development of tourism-related facilities have generated waste destroy ecosystem functions. Ecological footprint used to impact activities by in...

Journal: :Frontiers in Marine Science 2021

The high economic value of fisheries was historically associated to commercial teleost fishes. Since the 1970s, despite some elasmobranchs becoming an important target or a bycatch, relatively little research has been carried out on this group because their low value. Due specific life history characteristics, sharks and rays are particularly vulnerable overexploitation, taking several decades ...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2011
C J R Alho J Sabino

The Pantanal's biodiversity constitutes a valuable natural resource, in economic, cultural, recreational, aesthetic, scientific and educational terms. The vegetation plus the seasonal productivity support a diverse and abundant fauna. Many endangered species occur in the region, and waterfowl are exceptionally abundant during the dry season. Losses of biodiversity and its associated natural hab...

2002
BUDY P. RESOSUDARMO

The high price of flying fish eggs in Japan encourages South Sulawesi fishermen in Indonesia to harvest increasing quantities of eggs every year. Similarly, the increasing local demand for flying fish encourages Indonesian fishermen to use gill nets to catch more fish. As a consequence of this increasing quantity of eggs harvested and fish caught, Indonesia has become concerned about the overex...

2016
James A. Smith Michael B. Lowry Iain M. Suthers

has local production. The local fish production at this artificial reef was 384 g m−2 year−1, which is within the 105– 887 g m−2 year−1 range reported by Claisse et al., although our study included visitor species not included by Claisse et al. We estimate that the fish production new to the ecosystem may only be 4–5 % of the local production, due to the large abundance of visitor species on th...

2005
XAVIER BASURTO

The Seri people, a self-governed community of small-scale fishermen in the Gulf of California, Mexico, have ownership rights to fishing grounds where they harvest highly valuable commercial species of bivalves. Outsiders are eager to gain access, and the community has devised a set of rules to allow them in. Because Seri government officials keep all the economic benefits generated from grantin...

2012
Adelina Jiménez-Arellanes Jorge Cornejo-Garrido Gabriela Rojas-Bribiesca María del Pilar Nicasio-Torres Salvador Said-Fernández Benito David Mata-Cárdenas Gloria María Molina-Salinas Jaime Tortoriello Mariana Meckes-Fischer

Rubus liebmannii is an endemic species from Mexico used in traditional medicine primarily to treat dysentery and cough. The in vitro activity against Giardia lamblia and Entamoeba histolytica that produces the ethanolic extract of the aerial parts of the plant led us to expand the pharmacological and phytochemical research of this species. Gastrointestinal disorders including amebiasis remain o...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
Dag Ø Hjermann Geir Ottersen Nils Chr Stenseth

The vast majority of the world's fisheries are typically managed within a single-species perspective, ignoring the dynamic feedback mechanisms generated by the ecological web of which they are a part. Here we show that the dynamics of the Barents Sea capelin (Mallotus villosus), the world's largest stock of this species, is strongly influenced by both within-system ecological feedback mechanism...

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