A model for fishery resource with reserve area

2003 ◽  
Vol 4 (4) ◽  
pp. 625-637 ◽  
Author(s):  
B. Dubey ◽  
Peeyush Chandra ◽  
Prawal Sinha
Keyword(s):  
Fishery Resource ◽  
Reserve Area

scholarly journals A prey-predator model with harvesting for fishery resource with reserve area

2013 ◽  
Vol 37 (5) ◽  
pp. 3048-3062 ◽  
Author(s):  
Yunfei Lv ◽  
Rong Yuan ◽  
Yongzhen Pei
Keyword(s):  
Fishery Resource ◽  
Reserve Area ◽  
Predator Model

scholarly journals Harvesting Model for Fishery Resource with Reserve Area and Bird Predator

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Amit Sharma ◽  
Bhanu Gupta
Keyword(s):  
Numerical Simulation ◽  
Maximum Principle ◽  
Global Stability ◽  
Local Stability ◽  
Optimal Harvesting ◽  
Fishery Resource ◽  
Reserve Area ◽  
Proposed Model ◽  
Stability And Instability ◽  
Theoretical Results

The aim of this paper is to study the dynamics of fishery resource with reserve area in the presence of bird predator. The aquatic region under investigation is divided into two zones: one free for fishing and another restricted for any kind of fishery. The criteria of biological and bionomic equilibrium of system are established. The points of local stability, global stability, and instability are obtained for the proposed model. An optimal harvesting policy is established using Pontryagin’s maximum principle. At last the theoretical results obtained are illustrated with the help of numerical simulation.

scholarly journals The Inhibitory Effect of a Novel Polypeptide Fraction fromArca subcrenataon Cancer-Related Inflammation in Human Cervical Cancer HeLa Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Yu Wu ◽  
Xianjing Hu ◽  
Liyan Song ◽  
Jianhua Zhu ◽  
Rongmin Yu
Keyword(s):  
Cervical Cancer ◽  
Hela Cells ◽  
Molecular Mechanisms ◽  
Tumor Development ◽  
Basic Research ◽  
Inhibitory Effect ◽  
Fishery Resource ◽  
Proinflammatory Mediators ◽  
Raw264.7 Macrophage ◽  
Human Cervical Cancer

Inflammation is known to be closely associated with the development of cancer. The study was launched in human cervical cancer HeLa cells to investigate the antitumor and anti-inflammatory effects of P2, a marine polypeptide fraction from an important fishery resourceArca subcrenata. The basic research showed that P2 could suppress the production of nitric oxide in LPS-induced RAW264.7 macrophage cells as well as the secretion of inflammatory cytokines IL-6 and TNF-αin human cervical cancer HeLa cells. For the molecular mechanisms, P2 was shown to downregulate the gene expression of proinflammatory cytokines IL-6 and IL-8 and to inhibit the COX-2 and iNOS-related pathways in HeLa cells. In consequence, P2 might inhibit tumor development by blocking the interaction between tumor microenvironment and proinflammatory mediators. All findings indicate that P2 possesses the potential to be developed as a novel agent for cancer therapy.

Fishery resource use in a subarctic Indian community

Human Ecology ◽  
1977 ◽  
Vol 5 (4) ◽  
pp. 289-307 ◽  
Author(s):  
Fikret Berkes
Keyword(s):  
Resource Use ◽  
Fishery Resource ◽  
Indian Community

scholarly journals Conservation of white uacaries in Amazonian várzea

Oryx ◽  
1987 ◽  
Vol 21 (2) ◽  
pp. 74-80 ◽  
Author(s):  
J. Márcio Ayres ◽  
Andrew D. Johns
Keyword(s):  
Field Study ◽  
Scientific Community ◽  
The Public ◽  
Reserve Area ◽  
The Creation

Until two decades ago, the only reference to the white uacari of the upper Amazon, known locally as the ‘English monkey’, had been provided by the British naturalist Henry Walter Bates, who saw captured animals during his sojourn in Amazonia in the 1850s. A major Brazilian initiative led us to the first intensive field study of the species, which was carried out in 1983 and 1984 by one of the authors, J. M. Ayres, with the participation of a large number of Brazilian scientists and a few from overseas. The study illustrated the uniqueness of the várzea habitat in which the animals live and the threats it currently faces. It also captured the attention of both the Brazilian scientific community and the public. Possibilities for the creation of a reserve area within the várzea are now being implemented.

scholarly journals Myxobolus marajoensis sp. n. (Myxosporea: Myxobolidae), parasite of the freshwater catfish Rhamdia quelen from the Brazilian Amazon region

2017 ◽  
Vol 26 (4) ◽  
pp. 465-471 ◽  
Author(s):  
Jacqueline Abrunhosa ◽  
José Ledamir Sindeaux-Neto ◽  
Ândrea Kely dos Santos ◽  
Igor Hamoy ◽  
Edilson Matos
Keyword(s):  
New Species ◽  
18S Rdna ◽  
Phylogenetic Analyses ◽  
Muscle Layer ◽  
Gene Sequences ◽  
Fishery Resource ◽  
Rdna Gene ◽  
Brazilian Amazon Region ◽  
Rhamdia Quelen ◽  
18S Rdna Gene

Abstract This study provides morphological and molecular data of a new parasite species found in the muscle layer of the intestinal tract of the South American silver catfish, Rhamdia quelen from Marajó Island region (Pará State, Brazil), an important fishery resource with recognized potential for fish farming. The morphology of these parasites was reanalyzed and phylogenetic analyses were run on their 18S rDNA gene sequences. The spores were morphologically distinct from those of other Myxobolus species described previously. The obtained partial sequence of the 18S rDNA gene sequences of the new species were compared to those of 24 other Myxobolus and Henneguya species available in GenBank. The results of morphological and molecular analyses indicated clearly the existence of a new species, Myxobolus marajoensis sp. n.

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