scholarly journals Occurrence and variation in abundance of fouling organisms in an oyster farm in Isahaya Bay, Nagasaki Prefecture

2013 ◽  
Vol 30 (1) ◽  
pp. 1-10
Author(s):  
Satuito Cyril Glenn ◽  
Hideki Yamada ◽  
Satoshi Ohashi ◽  
Hitoshi Kitamura
Keyword(s):  
Isahaya Bay ◽  
Oyster Farm ◽  
Fouling Organisms ◽  
Nagasaki Prefecture

scholarly journals On Fouling Organisms in the Oyster Farm

1938 ◽  
Vol 6 (5) ◽  
pp. 223-232 ◽  
Author(s):  
Itirô MIYAZAKI
Keyword(s):  
Oyster Farm ◽  
Fouling Organisms

Diatoms in bottom sediments of thermokarst lakes of the Pechora Delta

2019 ◽  
pp. 285-290
Author(s):  
Elvira A. Zinnatova, Larisa A. Frolova ◽  
Larisa A. Frolova
Keyword(s):  
Bottom Sediments ◽  
Environmental Conditions ◽  
Sources Of Information ◽  
Thermokarst Lakes ◽  
Thermokarst Lake ◽  
Fouling Organisms ◽  
Diatom Complexes

The Northern lakes are good objects for paleoclimatic reconstructions. One of the sources of information about changes in the ecosystems of lakes are diatoms. The study of diatom complexes revealed 133 taxa belonging to 49 genera, 24 families, 13 orders and 3 classes in the bottom sediments of the thermokarst lake of the Pechora Delta. Dominated by the Holarctic representatives of benthic and fouling organisms giving preference to the alkaline environmental conditions.

Hatching Dates of the Japanese Flounder Settling at Yanagihama Beach in Nagasaki Prefecture, Japan

1994 ◽  
Vol 60 (4) ◽  
pp. 369-372 ◽  
Author(s):  
Tetsuhisa Noichi ◽  
Teruko Matsuo ◽  
Tetsushi Senta
Keyword(s):  
Japanese Flounder ◽  
Nagasaki Prefecture

Trichophyton tonsurans Infection in Nagasaki Prefecture

2009 ◽  
Vol 71 (4) ◽  
pp. 434-437 ◽  
Author(s):  
Kizou HONMA ◽  
Katsutaro NISHIMOTO ◽  
Motoi TAKENAKA
Keyword(s):  
Trichophyton Tonsurans ◽  
Nagasaki Prefecture

COASTAL ALTERATION AND CHANGES IN SHORELINE MORPHOLOGY DUE TO ARTIFICIAL STRUCTURES IN MIIRAKU TOWN ON FUKUE IS. IN THE GOTO ARCHIPELAGO

2017 ◽  
Author(s):  
Ryo Sakamoto ◽  
Ryo Sakamoto ◽  
Satoquo Seino ◽  
Satoquo Seino ◽  
Hirokazu Suzaki ◽  
...  
Keyword(s):  
Tang Dynasty ◽  
National Park ◽  
Survey Methods ◽  
Aerial Photographs ◽  
Sand Transport ◽  
The Status ◽  
The Tang Dynasty ◽  
Coastal Changes ◽  
Century Poetry ◽  
Nagasaki Prefecture

A construction of breakwaters and other shoreline structures on part of a coast influences drift sand transport in the bay, and causes comprehensive topographic changes on the beach. This study investigated shoreline and coastal changes, taking as an example of Shiraragahama Beach in Miiraku on the northwestern end of Fukue Island, Nagasaki Prefecture (Kyushu, Japan). Miiraku, adjacent to Saikai National Park, appears in the revered 8th century poetry collection “Manyoshu” and served as a port for a ship taken by the Japanese envoy to China during the Tang Dynasty (618-709). Because of the recent development of breakwaters for a fishing harbor, the shore environments of this beach have changed significantly. In this study, the status of silt deposits and topographic changes on this beach arising from the construction of a harbor breakwater were evaluated by comparing aerial photographs taken in different years. Next, the changes in the shoreline visible from aerial photographs from 1947 to 2014 were analyzed. Lastly, the altitude of the beaches was measured using accurate survey methods. The following results were obtained: 1) coastal erosion made rock cliffs to fall off along the shore and deposited sand on this beach; 2) the more serious advances or retreats of the shoreline took place around shoreline structures; 3) sandbars and beach cliffs were formed.

scholarly journals Substrate Selection of Ascidian Larva: Wettability and Nano-Structures

2021 ◽  
Vol 9 (6) ◽  
pp. 634
Author(s):  
Euichi Hirose ◽  
Noburu Sensui
Keyword(s):  
The Body ◽  
Substrate Selection ◽  
Artificial Structures ◽  
Substrate Preferences ◽  
Nano Structures ◽  
Hydrophobic Materials ◽  
Faunal Communities ◽  
Adhesive Organs ◽  
Fouling Organisms ◽  
Selection Of

Ascidians are marine sessile chordates that comprise one of the major benthic animal groups in marine ecosystems. They sometimes cause biofouling problems on artificial structures underwater, and non-indigenous, invasive ascidian species can potentially and seriously alter native faunal communities. Ascidian larvae are usually tadpole-shaped, negatively phototactic, and adhere on substrates by secreting a glue from their adhesive organs. Although larvae often prefer hydrophobic surfaces, such as a silicone rubber, for settlement, hydrophobic materials are often used to reduce occurrence of fouling organisms on artificial structures. This inconsistency may indicate that an attractive surface for larvae is not always suitable for settlement. Micro-scale structures or roughness may enhance the settlement of ascidian larvae, but settlement is significantly reduced by a nano-scale nipple array (or moth-eye structure), suggesting functional properties of similar structures found on the body surfaces of various invertebrates. The substrate preferences of larvae should be one of the important bases in considering measures against biofouling, and this review also discusses the potential uses of materials to safely reduce the impacts of invasive species.

scholarly journals Adhesion of acorn barnacles on surface-active borate glasses

2019 ◽  
Vol 374 (1784) ◽  
pp. 20190203 ◽  
Author(s):  
Kenan P. Fears ◽  
Andrew Barnikel ◽  
Ann Wassick ◽  
Heonjune Ryou ◽  
Janna N. Schultzhaus ◽  
...  
Keyword(s):  
Field Tests ◽  
Borate Glasses ◽  
Local Concentration ◽  
High Concentration ◽  
Marine Biofouling ◽  
Microbial Biofilms ◽  
Concentration Of Ions ◽  
Surface Active ◽  
Fouling Organisms ◽  
Aluminoborate Glass

Concerns about the bioaccumulation of toxic antifouling compounds have necessitated the search for alternative strategies to combat marine biofouling. Because many biologically essential minerals have deleterious effects on organisms at high concentration, one approach to preventing the settlement of marine foulers is increasing the local concentration of ions that are naturally present in seawater. Here, we used surface-active borate glasses as a platform to directly deliver ions (Na + , Mg 2+ and BO 4 3− ) to the adhesive interface under acorn barnacles ( Amphibalanus ( =Balanus ) amphitrite ). Additionally, surface-active glasses formed reaction layers at the glass–water interface, presenting another challenge to fouling organisms. Proteomics analysis showed that cement deposited on the gelatinous reaction layers is more soluble than cement deposited on insoluble glasses, indicating the reaction layer and/or released ions disrupted adhesion processes. Laboratory experiments showed that the majority (greater than 79%) of adult barnacles re-attached to silica-free borate glasses for 14 days could be released and, more importantly, barnacle larvae did not settle on the glasses. The formation of microbial biofilms in field tests diminished the performance of the materials. While periodic water jetting (120 psi) did not prevent the formation of biofilms, weekly cleaning did dramatically reduce macrofouling on magnesium aluminoborate glass to levels below a commercial foul-release coating. This article is part of the theme issue ‘Transdisciplinary approaches to the study of adhesion and adhesives in biological systems’.

Fouling organisms

1984 ◽  
pp. 226-240
Author(s):  
Robert E. Loveland ◽  
Sylvia S. Shafto
Keyword(s):  
Fouling Organisms
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