Inferring fast ecotypic divergence in a protected marine area: comparing QST and FST patterns in Littorina saxatilis subpopulations from Cíes Islands in Spain

2020 ◽  
Vol 167 (7) ◽  
Author(s):  
Juan Galindo ◽  
Juan Gefaell ◽  
Paloma Morán ◽  
Emilio Rolán-Alvarez
Keyword(s):  
Littorina Saxatilis ◽  
Marine Area

Sustainable tourism planning in Bahía Solano, Colombia

2020 ◽  
Vol 10 (2) ◽  
pp. 165-176
Author(s):  
Gabriela Antošová ◽  
Ivan Dario Medina Rojas ◽  
Mauricio Peralta Mejía ◽  
Helmuth Yesid Arias Gómez
Keyword(s):  
Social Innovation ◽  
Local Development ◽  
Sustainable Tourism ◽  
High Rate ◽  
Tourism Planning ◽  
Tourist Attractions ◽  
Marine Area ◽  
Bird Watching ◽  
Enormous Amount ◽  
Water Sports

AbstractThe municipality of Bahía Solano possesses important tourist attractions. The majority of them consist of natural wonders such as whale, dolphin and bird watching. Its marine area offers diving courses, all types of fishing, surfing, other water sports etc. The enormous amount of natural wealth stands in contrast to the lack of local development and the high rate of poverty among its inhabitants. Bahía Solano has enviable tourist professions but a low level of competition. This research proposes a methodology of social innovation, elaborated by researchers, that involves nature, communities and tour operators, where a connection of surveys with the expectations and perceptions of the different entities (inhabitants, tourists, and tour operators) has been obtained.

scholarly journals A developmentally descriptive method for quantifying shape in gastropod shells

2020 ◽  
Vol 17 (163) ◽  
pp. 20190721
Author(s):  
J. Larsson ◽  
A. M. Westram ◽  
S. Bengmark ◽  
T. Lundh ◽  
R. K. Butlin
Keyword(s):  
Empirical Studies ◽  
Three Dimensional ◽  
Shell Shape ◽  
Large Set ◽  
Littorina Saxatilis ◽  
Shape Variation ◽  
Gastropod Shell ◽  
Geometric Morphometric ◽  
Wide Range ◽  
Descriptive Method

The growth of snail shells can be described by simple mathematical rules. Variation in a few parameters can explain much of the diversity of shell shapes seen in nature. However, empirical studies of gastropod shell shape variation typically use geometric morphometric approaches, which do not capture this growth pattern. We have developed a way to infer a set of developmentally descriptive shape parameters based on three-dimensional logarithmic helicospiral growth and using landmarks from two-dimensional shell images as input. We demonstrate the utility of this approach, and compare it to the geometric morphometric approach, using a large set of Littorina saxatilis shells in which locally adapted populations differ in shape. Our method can be modified easily to make it applicable to a wide range of shell forms, which would allow for investigations of the similarities and differences between and within many different species of gastropods.

scholarly journals Biogenic Iodine and Iodine-Containing Metabolites

2006 ◽  
Vol 1 (2) ◽  
pp. 1934578X0600100 ◽  
Author(s):  
Valery M Dembitsky
Keyword(s):  
Marine Invertebrates ◽  
Biological Activities ◽  
Biological Significance ◽  
Covalent Bond ◽  
Minor Components ◽  
Marine Area ◽  
The Future ◽  
Comprehensive Survey ◽  
Living Organisms

This review is intended as a comprehensive survey of iodinated metabolites possessing carbon–iodine covalent bond, which have been obtained from living organisms. Generally thought to be minor components produced by many different organisms these interesting compounds now number more than 110. Many from isolated and identified iodine-containing metabolites showed high biological activities. Recent research, especially in the marine area, indicates this number will increase in the future. Sources of iodinated metabolites include microorganisms, algae, marine invertebrates, and some animals. Their origin and possible biological significance have also been discussed.

scholarly journals Impact of Intensive Land-Based Fish Culture in Qingdao, China, on the Bacterial Communities in Surrounding Marine Waters and Sediments

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Qiufen Li ◽  
Yan Zhang ◽  
David Juck ◽  
Nathalie Fortin ◽  
Charles W. Greer
Keyword(s):  
Bacterial Communities ◽  
Gel Electrophoresis ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Fish Culture ◽  
Fish Ponds ◽  
Marine Area ◽  
Gradient Gel Electrophoresis ◽  
Reducing Bacteria ◽  
The Impact ◽  
Nitrate Reducing Bacteria

The impact of intensive land-based fish culture in Qingdao, China, on the bacterial communities in surrounding marine environment was analyzed. Culture-based studies showed that the highest counts of heterotrophic, ammonium-oxidizing, nitrifying, and nitrate-reducing bacteria were found in fish ponds and the effluent channel, with lower counts in the adjacent marine area and the lowest counts in the samples taken from 500 m off the effluent channel. Denaturing gradient gel electrophoresis (DGGE) analysis was used to assess total bacterial diversity. Fewer bands were observed from the samples taken from near the effluent channel compared with more distant sediment samples, suggesting that excess nutrients from the aquaculture facility may be reducing the diversity of bacterial communities in nearby sediments. Phylogenetic analysis of the sequenced DGGE bands indicated that the bacteria community of fish-culture-associated environments was mainly composed of Flavobacteriaceae, gamma- and deltaproteobacteria, including generaGelidibacter, Psychroserpen, Lacinutrix,andCroceimarina.

Dynamics of Production in a Marine Area

1946 ◽  
Vol 16 (4) ◽  
pp. 321-337 ◽  
Author(s):  
George L. Clarke ◽  
W. T. Edmondson ◽  
W. E. Ricker
Keyword(s):  
Marine Area

Genetic differentiation in Littorina saxatilis (Gastropoda)

1973 ◽  
Vol 22 (2) ◽  
pp. 177-182 ◽  
Author(s):  
T. P. Snyder ◽  
J. L. Gooch
Keyword(s):  
Genetic Differentiation ◽  
Littorina Saxatilis

Tolerance to heavy metals in Littorina saxatilis from a metal contaminated estuary in the Isle of Man

2004 ◽  
Vol 84 (2) ◽  
pp. 393-400 ◽  
Author(s):  
Erema R. Daka ◽  
Stephen J. Hawkins
Keyword(s):  
Littorina Saxatilis ◽  
Co Tolerance ◽  
Isle Of Man ◽  
Run Off ◽  
High Zinc ◽  
Lead Tolerance ◽  
Test Concentration ◽  
A Site ◽  
High Lead ◽  
Tolerance To Copper

Population differences were measured in the tolerance of Littorina saxatilis from sites around the Isle of Man, to acute exposure to zinc, lead, copper and cadmium. Animals from a site influenced by disused mine run-off in Laxey estuary (high zinc) were compared with animals from less contaminated estuaries (Peel-high lead, but lower zinc), and the relatively uncontaminated Castletown and Ramsey estuaries, plus the open coast near Derbyhaven. Median lethal times (LT50) were estimated for each test concentration (5, 10, 20 mg l−1 Zn; 5, 10 mg l−1 Pb; 0·5, 1·0, 2·0 mg l−1 Cu and Cd) except for those that did not produce sufficient mortalities. Individuals from Laxey estuary showed significantly higher tolerances to zinc (10 mg l−1) and lead (5 mg l−1) than animals from the unpolluted sites. No co-tolerance to copper or cadmium was apparent. Population tolerance to zinc was correlated with reduced accumulation rates. Lead tolerance may result from the ability of the tolerant individuals to sequester the metal and detoxify it in their tissues; the littorinids from Laxey had significantly higher rates of lead accumulation.

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