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Mar 15, 2018Open    AccessArticle

Detection of Horizontal Transfer of Housekeeping and Hydrocarbons Catabolism Genes in Bacterial Genus with Potential to Application in Bioremediation Process

Edmo Montes Rodrigues, Fernanda de Souza Freitas, Tatiane de Paula Siqueira
In silico analysis can be useful to infer about the horizontal gene transfer (HGT) as well as to deduce about the evolutionary relations of catabolic genes. In this study, we performed the analysis of two housekeeping genes (fabD and rpoD) and two catabolic gene

Mar 05, 2018Open    AccessArticle

Epiphytic Bacterial Communities in Seagrass Meadows of Oligotrophic Waters of Andaman Sea

Amrit Kumar Mishra, Raju Mohanraju
The epiphytic microbial communities of seagrass (Cymodocea rotundata and Thalassia testudinum) along with sediments and seawater of the seagrass ecosystem of Andaman

Feb 28, 2018Open    AccessArticle

The True Mechanism That Controls the Stock-Recruitment Relationship

Kazumi Sakuramoto
I propose a mechanism that controls the stock-recruitment relationship (SRR), which should replace traditional SRR models. The difference between the traditional SRR models and the model proposed herein is whether or not a density-dependent effect is assumed. The new mechanism elucidates the following: 1) why clockwise loops or anticlockwise loops are commonly observed in an actual SRR, and 2) the age at maturity (not a density-de

Jan 11, 2018Open    AccessArticle

Sargassum, Gracilaria and Ulva Exhibit Positive Antimicrobial Activity against Human Pathogens

Amrit Kumar Mishra
Bacterial resistance to pharmaceutical drugs is on rise, which emphasizes the need for screening of new drugs from natural resources. Seaweeds from the marine ecosystem are important source of bioactive compounds making them one of the major subjects for screening of various pharmaceutical drugs. So here, we assessed the bacterial growth inhibitory functions of four seaweeds Sargassum wightii

Dec 29, 2017Open    AccessArticle

Knowledge of Climate Change and the Perception of Nigeria’s Coastal Communities on the Occurrence of Sargassum natans and Sargassum fluitans

Lucette Adet, Godwin Nmeka Nsofor, Kehinde Olufunso Ogunjobi, Brahima Camara
Climate change effects threat life on earth especially economically poor areas. Among them is noticed the shifting of the algae species Sargassum natans and Sargassum fluitanss seaweeds from the Brazilian coast to new areas along the West African coastline. Their occurrence along the Nigerian

Sep 19, 2017Open    AccessArticle

Are 20% B0, 20% Bunfished, and BMSY Valid as Reference Points for Fisheries Resource Management?

Kazumi Sakuramoto
The aim of this paper is to discuss the validity of 20% B0, 20% Bunfished and BMSY as reference points for managing fisheries resources. I reanalyzed eight stock-recruitment relationship (SRR) sets of data that were analyzed by Myers et al

Jun 19, 2017Open    AccessArticle

Clockwise Loops and Anticlockwise Loops Observed in a Stock-Recruitment Relationship

Kei Tanaka, Naoki Suzuki, Kazumi Sakuramoto
Loop-shaped trajectories are commonly observed in the stock recruitment relationship (SRR). A mechanism has been proposed that explains why the loops emerge in SRR. The aim of this study is to validate the mechanism using data for the stocks of 24 fish species that live in the waters around Japan. The following three questions are examined: 1) whether or not loop shapes are detected in SRRs for all 24 stocks;

May 23, 2017Open    AccessArticle

Correction of “A Recruitment Forecasting Model for the Pacific Stock of the Japanese Sardine (Sardinops melanostictus) That Does Not Assume Density-Dependent Effects”

Kazumi Sakuramoto
One error was found in the coding of the simulation program for reproducing the recruitment (R) and spawning stock biomass (SSB) of the Pacific stock of the Japanese sardine. As a result of this error, the maturity rate for age 1 in the simulation was found to be half of the value cited from the literature. The aim of this paper is to show the results when the error is corrected. When the error was corrected, the r

Apr 28, 2017Open    AccessArticle

Correction of “Case Study: A Simulation Model of the Spawning Stock Biomass of Pacific Bluefin Tuna and Evaluation of Fisheries”

Kazumi Sakuramoto
One error was found in the coding of the simulation program for reproducing the recruitment (R) and spawning stock biomass (SSB) of Pacific bluefin tuna. As a result of this error, the maturity rates for ages 3 and 4 were found to be much lower in the simulation than the true values. The aim o

Mar 29, 2017Open    AccessArticle

Temperature Tolerance Test Exposition with Temperate Sea Anemone Actinia equina, a Climatic and Environmental Changes Simulation

Juliana Rodrigues Gadelha, Fátima Jesus, Paula Braga Gomes, Jaime Rendón Von Osten, Fernando Morgado, Amadeu Mortágua Velho da Maia Soares
Atlantic and Mediterranean warming-related diseases outbreaks and species shifts recently have been documented. Evaluated tools of short-term effects on the health or organisms resistance are necessary to assess and understand mechanisms affecting marine biodiversity. Until now, climate warming has been studied at the population or community level. Here we offer a better understanding of such phenomena at the individual organism l