scholarly journals Use of an estuarine environment (Barra do Saí lagoon, Brazil) as nursery by fish

2006 ◽  
Vol 23 (4) ◽  
pp. 1117-1122 ◽  
Author(s):  
Ana L. Vendel ◽  
Paulo de T. Chaves
Keyword(s):  
Life Cycle ◽  
Coastal Zone ◽  
Juvenile Fish ◽  
Freshwater Fishes ◽  
Estuarine Environment ◽  
Active Movement ◽  
Northern Coast ◽  
Average Depth ◽  
Beach Seine ◽  
Turbidity Increase

Studies were carried out at the Barra do Saí lagoon, on the northern coast of Santa Catarina State, Brazil, to evaluate the function played by this estuary in the life cycle of fish found at the coastal zone. Samplings were performed using beach seine net from December 2000 to November 2001. The continental influence is strong, as showed by the occurrence of freshwater fishes, although most of the 43 species recorded are marine ones. It was verified that around summer, when the temperature of the water is high, the values of salinity decrease and those of turbidity increase. At this time there is also an increase in the abundance of juvenile fish in the lagoon. Because of its average depth of less than 0.7 m, the lagoon is inhabited primarily by juveniles, which may enter either by active movement or passive displacement, originating from the sea or the river to which the lagoon is connected. The lagoon is not used for sheltering spawning individuals. It is showed that a shallow, small estuary with a blind bottom can conceal an importance for the coastal ichthyofauna that is greater than it could be expected from the occurrence - in this case, modest - of large individuals.

Application of Life Cycle Risk Assessment (LCRA) of Fish to Different Suburban Streams

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
Yusuke Bando ◽  
Nobuhiko Kikuchi ◽  
Yutaka Sakakibara
Keyword(s):  
Risk Assessment ◽  
Life Cycle ◽  
Dissolved Oxygen ◽  
Human Activities ◽  
Field Survey ◽  
Freshwater Fishes ◽  
Habitat Conditions ◽  
Pollution Levels ◽  
Literature Reviews ◽  
Good Agreement

A Life Cycle Risk Assessment (LCRA) proposed in our former study was applied to 12 suburban streams to evaluate crucial stress and habitat conditions for 15 freshwater fishes in Japan. In LCRA, 8 stresses produced by human activities were taken into consideration, referring to the literature. Field survey and literature reviews were conducted to identify the present existence and distributions of corresponding fishes in the streams which have different pollution levels and morphologies. Crucial stresses frequently identified by the LCRA were depletion of dissolved oxygen (DO), disappearances of habitats (e.g. deep and shallow), disappearance of spawning area due to benthic deposition, and existence of obstructions in the streams. Most LCRA results regarding existence or non-existence of 15 fishes were in fairly good agreement with field survey or literature reviews results. From these results, we thought the present LCRA would be a useful tool in assessing crucial stress as well as in evaluating habitat conditions in steams, which could be used for the restoration of steams.

scholarly journals Reclaimed artificial coastal territories for the development of urban areas

2019 ◽  
Vol 110 ◽  
pp. 01025
Author(s):  
Mikhail Shilin ◽  
Alexandra Ershova ◽  
Yuri Matveev ◽  
Nikolay Popov ◽  
Olga Mandryka ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Urban Areas ◽  
Urban Infrastructure ◽  
Green Economy ◽  
Northern Coast ◽  
Ecological Stability ◽  
Side Scan Sonar ◽  
The North ◽  
Coastal Landscapes ◽  
Neva Bay

The article discusses the possibility and perspectives of using the reclaimed artificial areas in the coastal zone of marine estuaries for the sustainable development of urban infrastructure and creation of modern architectural ensembles with the background of green economy using the example of Lakhta-Center on the northern coast of the Neva Bay (St. Petersburg, Russia). The geo-ecological stability of underwater and coastal landscapes of the coastal zone of the Neva Bay is analyzed using side scan sonar. The environmental sensitivity of coastal ecosystems is estimated. The received data can be used on practice for planning the construction work and for the development of the infrastructure of urbanized coastal zone of the Neva Bay. The general geo-ecological situation in the observed area is rather stable. The coastal zone has good perspectives for the development of a sustainable urban infrastructure against the backdrop of the green economy. The special attention should be paid to migration of birds and fish, who are using the North Lakhta coast as a temporary refugium during Spring and Autumn migrations. An effective solution from both environmental and economic points of view could be the organization of the Nature Conservation Reserve, which is spatially associated with the Lakhta Center zone. Such type of the complex using of the coastal zone could be a good example of the spatial planning in the environmentally sensitive area.

scholarly journals ASSESSMENT OF SOCIO-ECONOMIC CONSEQUENCES OF HAZARDOUS ABRASION AND LANDSLIDE PROCESSES IN THE COASTAL ZONE OF THE AZOV SEA

2020 ◽  
Vol 1 (5) ◽  
pp. 196-201
Author(s):  
A.D. Khаvanskiy ◽  
◽  
V.V. Latun ◽  
O.A. Khoroshev ◽  
Yu.Yu. Merinova ◽  
...  
Keyword(s):  
Coastal Zone ◽  
High Speed ◽  
Economic Damage ◽  
Northern Coast ◽  
Economic Risk ◽  
Azov Sea ◽  
Southeast Coast ◽  
Landslide Processes ◽  
Capital Construction ◽  
Taganrog Bay

The main factors of the formation of hazardous coastal processes have been established, 38 functional areas and a zone of impact of hazardous abrasion and landslide processes predicted for a 20-year period have been identified in the coastal zone of the Azov Sea by their uniform combination in the coastal zone of the Azov Sea. In the forecasted area, 112 socio-economic objects have been identified that are exposed to hazardous abrasion and landslide processes. A methodology has been developed and the socio-economic risk of manifestation of abrasion and landslide processes in the coastal zone of the Azov Sea has been assessed. The highest values of the socio-economic risk of abrasion and landslide processes occur in abrasion and abrasion-landslide areas of the coast with a high speed abrasion, a large number of capital construction projects and a high value of material losses. For socio-economic objects in the risk zone, an enlarged calculation of the possible economic damage was made. The value of the predicted (in the future for 20 years) total economic damage from the consequences of the manifestation of abrasion and landslide processes in the coastal zone of the Azov Sea will amount to 756,7 million rubles, of which 114,4 million rubles will fall on the northern coast of the Taganrog Bay, 156,8 million rubles – to the southern coast of the Taganrog Bay and 485,6 million rubles – to the southeast coast of the Azov Sea. The most dangerous areas of abrasion and landslide processes for capital construction sites are: on the northern shore of the Taganrog Bay – Botsmanovsky, with damage to capital structures – more than 50 million rubles, Zolotokosovsky – more than 16 million rubles; Kuchugurskiy – more than 17 million rubles – on the southeast coast of the Azov Sea.

KERAGAMAN IKTIOFAUNA MUARA SUNGAI CIMANUK, INDRAMAYU, JAWA BARAT

2018 ◽  
Vol 17 (1) ◽  
pp. 39 ◽  
Author(s):  
Prawira ARP Tampubolon ◽  
Yunizar Ernawati ◽  
M.F. Rahardjo
Keyword(s):  
Life Cycle ◽  
River Estuary ◽  
Northern Coast ◽  
Total Fish

Cimanuk river, which the estuary formed a delta, is a habitat for many fishes that occupied the water in northern coast of Ja va. The estuary is essential for supporting the fish life cycle. The aim of this study was to asscess the diversity of ichthyo fauna in Cima nuk River estuary. The fishes were collected in three months from July to September 2013 at three locations: Pagirikan, Pabean Ilir and Song. Total fish collected were 1,826 individuals, consisted of 103 species from 41 families and 14 orders. Most of them were from Family Ambassidae,Leiognathidae, Scianidae, Gobiidae, and Ariidae.

scholarly journals Artisanal fisheries production in the coastal zone of Itaipu, Niterói , RJ, Brazil

2007 ◽  
Vol 55 (3) ◽  
pp. 187-197 ◽  
Author(s):  
Rafael de Almeida Tubino ◽  
Cassiano Monteiro-Neto ◽  
Luiz Eduardo de S. Moraes ◽  
Eduardo Tavares Paes
Keyword(s):  
Coastal Zone ◽  
Hierarchical Classification ◽  
Artisanal Fisheries ◽  
Local Market ◽  
Fishing Gear ◽  
Catch Per Unit Effort ◽  
Beach Seine ◽  
Daily Production ◽  
Trichiurus Lepturus ◽  
Species Groups

Artisanal fisheries in the coastal zone of Itaipu-RJ play an important role in the local market, but little is known about production and productivity of the fisheries. From April 2001 to March 2003, we monitored a total of 618 landings from the beach-seine (99), the gill nets ("corvineira" - 331, "linguadeira" - 40 and "rede alta" - 25), the hook and line (98), the squid jigging (17), and the spear fishing and trap fisheries (five and three, respectively). The total monitored production was 21866 kg and the catch per unit effort (CPUE) 35.4 kg.trip-1. Considering the number of effective fishing days and the average daily production per fishing gear, the annual production was estimated at 136687 kg (0.2% of the state's production in 2004). Predominant resources were: Micropogonias furnieri,Trichiurus lepturus, squids (Loligo spp.), clupeiform fishes (Sardinella brasiliensis, Cetengraulis edentulus, Pellona harrowerii and Harengula clupeola), Eucinostomus spp., Cynoscion spp., Menticirrhus spp., Caranx crysos and Selene setapinnis. The combined analysis using hierarchical and non-hierarchical classification methods, separated four fishing gears and five species groups, based on their similarity patterns, identifying gears that most effectively capture the different fish groups. The beach-seine was less selective and most productive fishery in the summer. The "corvineira" was the second most productive fishery with higher yields in the summer and fall. Catches of "linguadeira" included rays and Paralychthys spp., wherereas the "rede alta" caught primarily M. furnieri,Mugil spp. and sharks.

scholarly journals Biofilms Comprise a Component of the Annual Cycle ofVibrio choleraein the Bay of Bengal Estuary

mBio ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. e00483-18 ◽  
Author(s):  
Marzia Sultana ◽  
Suraia Nusrin ◽  
Nur A. Hasan ◽  
Abdus Sadique ◽  
Kabir U. Ahmed ◽  
...  
Keyword(s):  
Life Cycle ◽  
Vibrio Cholerae ◽  
Causative Agent ◽  
Aquatic Environment ◽  
Morphological Changes ◽  
Living Cells ◽  
Estuarine Environment ◽  
Annual Life Cycle ◽  
Free Living ◽  
Content Type

ABSTRACTVibrio cholerae, an estuarine bacterium, is the causative agent of cholera, a severe diarrheal disease that demonstrates seasonal incidence in Bangladesh. In an extensive study ofV. choleraeoccurrence in a natural aquatic environment, water and plankton samples were collected biweekly between December 2005 and November 2006 from Mathbaria, an estuarine village of Bangladesh near the mangrove forests of the Sundarbans. ToxigenicV. choleraeexhibited two seasonal growth peaks, one in spring (March to May) and another in autumn (September to November), corresponding to the two annual seasonal outbreaks of cholera in this region. The total numbers of bacteria determined by heterotrophic plate count (HPC), representing culturable bacteria, accounted for 1% to 2.7% of the total numbers obtained using acridine orange direct counting (AODC). The highest bacterial culture counts, including toxigenicV. cholerae, were recorded in the spring. The direct fluorescent antibody (DFA) assay was used to detectV. choleraeO1 cells throughout the year, as free-living cells, within clusters, or in association with plankton.V. choleraeO1 varied significantly in morphology, appearing as distinctly rod-shaped cells in the spring months, while small coccoid cells within thick clusters of biofilm were observed during interepidemic periods of the year, notably during the winter months. ToxigenicV. choleraeO1 was culturable in natural water during the spring when the temperature rose sharply. The results of this study confirmed biofilms to be a means of persistence for bacteria and an integral component of the annual life cycle of toxigenicV. choleraein the estuarine environment of Bangladesh.IMPORTANCEVibrio cholerae, the causative agent of cholera, is autochthonous in the estuarine aquatic environment. This study describes morphological changes in naturally occurringV. choleraeO1 in the estuarine environment of Mathbaria, where the bacterium is culturable when the water temperature rises and is observable predominantly as distinct rods and dividing cells. In the spring and fall, these morphological changes coincide with the two seasonal peaks of endemic cholera in Bangladesh.V. choleraeO1 cells are predominantly coccoid within biofilms but are rod shaped as free-living cells and when attached to plankton or to particulate matter in interepidemic periods of the year. It is concluded that biofilms represent a stage of the annual life cycle ofV. choleraeO1, the causative agent of cholera in Bangladesh.

scholarly journals Heavy metals in the bottom sediments of the coastal zone of the eastern part of the Gulf of Finland

2021 ◽  
Vol 265 ◽  
pp. 02015
Author(s):  
Valentina Kudryavtseva ◽  
Tatyana Shigaeva ◽  
Natalya Alekseeva
Keyword(s):  
Heavy Metals ◽  
Coastal Zone ◽  
Bottom Sediments ◽  
Gulf Of Finland ◽  
Northern Coast ◽  
Climatic Fluctuations ◽  
Massive Growth ◽  
Cadmium And Lead ◽  
The City ◽  
The Gulf Of Finland

For each summer from 2014 to 2019 the total concentrations of copper, zinc, cadmium, and lead in the surface layers of bottom sediments in the coastal zone of the eastern part of the Gulf of Finland were measured. The northern coast in the area of the city of Primorsk currently sees the rate of the pollution of surface-level bottom sediments with heavy metals decrease, although the concentration levels remain high. On the southern coast in the area of the city of Lomonosov the pollution of the bottom sediments is on the rise due to the ongoing construction of the Bronka seaport. In the Koporskaya and Grafskaya Bays a massive growth of macroalgae caused a further accumulation of metals in the bottom sediments, which are greatly impacted by climatic fluctuations.

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