Long-term benefits of artificial reef modules for reef recovery in gulf of Mannar, Southeast India

The Baltic Sea is one of the most frequented regions in the world. The Baltic neighbouring states more and more see the need to adapt their economic interests to the given ecological conditions. This can not always be done sufficiently, which can be seen at the example of coastal fishery in some of these countries. Owing to the critical condition of economically important fish stocks, selective fishing and fish-stock saving measures have become main fields of research. Supported by the European Union and by the federal state government we have tried in Mecklenburg-Vorpommern during the last four years to investigate the effects of an artificial Baltic reef with respect to fishing. For this purpose more than 1300 reef elements — made of a special sort of concrete and having different shapes and size — have been arranged on an area of 200 × 200 m at a water depth of 12 m about 1.5 m away from the coast. Over a period of almost four years different methods and techniques have been applied to observe and record the effects of these structures on the natural environment in a long-term investigation. Continuous video-optical underwater observation using up to nine simultaneously controlled underwater cameras proved to be a special technical challenge. Important results have been gained from a monitoring with research divers and from a defined test and comparison fishing done once every month. Various fishing methods have been applied — also those which are normally not common in that region. A special low-cost variant of a remote controlled underwater stereo photo camera has been developed and built in order to get biometric data of the fish without catching it.

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Amphipod assemblages from an artificial reef: a long-term analysis

Crustaceana ◽

10.1163/15685403-00003207 ◽

2013 ◽

Vol 86 (7-8) ◽

pp. 1025-1037 ◽

Cited By ~ 1

Author(s):

M. Targusi ◽

L. Lattanzi ◽

L. Nicoletti

Keyword(s):

Species Composition ◽

Spatial Heterogeneity ◽

Artificial Reef ◽

Scuba Diving ◽

Tyrrhenian Sea ◽

Abundance And Diversity ◽

Second Period ◽

Term Analysis

The aim of this paper is to evaluate the long-term development of a hard bottom amphipod assemblage over a period of 12 years. Amphipod data were collected in the artificial reef of Fregene, situated in the central Tyrrhenian Sea (Italy). Amphipod samplings were carried out by scuba diving in two different periods: 1991-1992 (1st period) and 2001-2003 (2nd period). The amphipod assemblage’s structure and species composition changed over the years, as the species collected on the reef in the second period differed from those collected in the first. In addition, within the same timeframe the assemblage shows an increase in both abundance and diversity, as a result of the reef’s increase in spatial heterogeneity.

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Impacts of a Multi-Purpose Artificial Reef on Hydrodynamics, Waves and Long-Term Beach Morphology

Journal of Coastal Research ◽

10.2112/si95-137.1 ◽

2020 ◽

Vol 95 (sp1) ◽

pp. 706

Author(s):

Guilherme Vieira da Silva ◽

Daniel Hamilton ◽

Thomas Murray ◽

Darrell Strauss ◽

Saeed Shaeri ◽

...

Keyword(s):

Artificial Reef ◽

Beach Morphology

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The coral-killing red sponge Clathria (Microciona) aceratoobtusa (Porifera: Demosponigiae) invades various coral communities of Gulf of Mannar Marine National Park, southeast India

The European Zoological Journal ◽

10.1080/24750263.2019.1708486 ◽

2020 ◽

Vol 87 (1) ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

A. M. Ashok ◽

B. Calcinai ◽

J. K. P. Edward

Keyword(s):

National Park ◽

Gulf Of Mannar ◽

Coral Communities ◽

Southeast India

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Coral-Killing Sponge Terpios hoshinota Invades the Corals of Gulf of Mannar, Southeast India

Current Science ◽

10.18520/cs/v114/i05/1117-1119 ◽

2018 ◽

Vol 114 (05) ◽

pp. 1117 ◽

Cited By ~ 4

Author(s):

K. Diraviya Raj ◽

M. Selva Bharath ◽

G. Mathews ◽

Greta S. Aeby ◽

J. K. Patterson Edward

Keyword(s):

Gulf Of Mannar ◽

Terpios Hoshinota ◽

Southeast India

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Research of High Performance Artificial Reef for Breeding Abalone in Sea Water

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.302-303.398 ◽

2006 ◽

Vol 302-303 ◽

pp. 398-404

Author(s):

Ming Tang ◽

Xiao Li ◽

Tao Wang

Keyword(s):

High Performance ◽

Large Scale ◽

Sea Water ◽

Artificial Reef ◽

Silicon Powder ◽

Ocean Current ◽

Concrete Technology ◽

Long Term Stability ◽

One Year

According to abalone’s growth characteristics, artificial abalone reefs are invented in this paper. The trace elements are added in concrete. The proportion is fixed by test. Ocean alga adheres to reefs with them very well. The craft, matching optimization, curing terms in the island environment and concrete long-term stability in the ocean current are studied to solve the durability of reefs in the marine environment. It shows the durability of fishing reef by high performance, high function, and ecological concrete technology is reliable. Its strength is still increasing for one year and no damage has been found. It is feasible to use the complex admixture, high-quality fly ash, ultrafine silicon powder, surface-soaking-into water-hating material made by our own, adhering-shaking-compact molding equipment made by ourselves and solar-energy-curing technology. Ten thousands of large-scale artificial abalone reefs have been done. A large amount of marine organisms covered the reefs only after 40 days using.

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The polychaete community of the Fregene artificial reef (Tyrrhenian Sea, Italy): a 20-year study (1981–2001)

Zoosymposia ◽

10.11646/zoosymposia.2.1.38 ◽

2009 ◽

Vol 2 (1) ◽

pp. 551-566 ◽

Cited By ~ 4

Author(s):

Sara Marzialetti ◽

Luisa Nicoletti ◽

Gian Domenico Ardizzone

Keyword(s):

Community Dynamics ◽

Artificial Reef ◽

Tyrrhenian Sea ◽

Benthic Assemblage ◽

Benthic Assemblages ◽

Additional Species ◽

Vertical Walls ◽

Multivariate Cluster ◽

The Town

The artificial reef of Fregene, Italy, was built in 1981 as a multipurpose structure with the intent of protecting the coastal environment from illegal trawling and also improving fishery production. It is located at 10–14 m depth on a sandy-silty seabed in the Tyrrhenian Sea, 5 nmi north of the outlet of the Tevere River (Latium, Italy) and 1.5 nmi offshore the town of Fregene (Latium, Italy). The development of the polychaete community on the reef was studied from May 1981 to December 2001 in order to examine long-term community dynamics and verify to what extent changes in polychaete assemblage could depict the development of the benthic assemblage. At each sampling time, two standard surfaces of 400 cm2 were scraped from the vertical walls of the same block. Temporal changes in the development of the polychaete community were detected by univariate (S, N, ExpH', 1/Simpson, J') and multivariate (CLUSTER, nMDS) analysis of the faunal data. Functional structure of the community was also analyzed. Changes in the community structure were shown by an overall increasing trend in the total number of species and individuals. The 20-year development of the polychaete community was divided into five different phases representing different benthic assemblages on the reef: the first two periods correspond to settlement of pioneer species (1981–82); the third is a phase characterized by Mytilus galloprovincialis dominance and regression (1983–85); the fourth is a phase of mud accumulation between dead balanids, with the presence of laminar bryozoans (1991–92), and the last corresponds to a phase dominated by bryozoan bioconstruction (2001). The increased complexity in the benthic assemblage and substratum on the reef is also shown by an increased differentiation and distribution of polychaete functional groups. Increasing environmental heterogeneity on the reef is the basic factor that affected biodiversity by generating new niches that could be occupied by additional species with different ecology. The similarity of the benthic assemblage observed on the reef in 2001 with natural bioconstructions suggest that after two decades the ecological succession has lead to a settlement at a steady-state of equilibrium with the surrounding environment.

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USING AGGREGATING DEVICES TO SAMPLE FISH RECRUITS AROUND DEEP SHIPWRECKS: EXPERIMENTS AND SUGGESTIONS

Arquivos de Ciências do Mar ◽

10.32360/acmar.v53i1.42376 ◽

2020 ◽

Vol 53 (1) ◽

pp. 63-81

Author(s):

José Renato Mendes de Barros Correia ◽

Erandy Gomes da Silva ◽

Carlos Augusto França Schettini ◽

José Carlos Pacheco dos Santos ◽

Tiago Hilário Pedrosa Campello ◽

...

Keyword(s):

Artificial Reef ◽

Reef Fishes ◽

Work Time ◽

Term Study ◽

Good Tool ◽

Gregarious Behavior ◽

Long Term Study ◽

Fish Aggregating Devices ◽

First Time

Fish aggregating devices (FAD) are an ancient fishery technique that benefits from the gregarious behavior of many species. They represent alternatives to usual census approach to study fish recruits. Based on this, we test two FAD models built for fish recruitment research, Standard monitoring unit for the recruitment of reef fishes (SMURF) and Artificial Reef Mooring (ARM) moored for the first time close to deep shipwrecks inBrazil Northeastern coast. We compared fish recruits’ abundance sampled by both models at two depths, bottom and mid-water (6 meters from the bottom). SMURFs sampled seven times more fish recruits than ARM with no difference between depth. We discovered that SMURFs mooring tilted 24º in mean with local marine currents. A long-term study with SMURFs tested immersion time influence in recruit’s sampling, and explored recruit’s abundance and standard length at two depth from the bottom. Increasing immersion timefrom 14-28 days did not influence recruit’s abundance. Bottom and Mid-water SMURFs sampled equal recruit’s number and fish sizes were significantly larger at the bottom. FADs, specially SMURFs, showed good tool to sample fish recruits in deeper shipwrecks,however standardization of FAD deployment is indicated to maximize work time and security in unstable sea conditions.

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