The effect of artificial reef structural complexity and benthic colonization on gill net fish assemblages.

Brotto, Daniel Shimada; Zalmon, Ilana Rosental

doi:10.5914/tropocean.v35i1-2.5079

Cited by 9 publications

(9 citation statements)

References 9 publications

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“…As observed by Brotto and Zalmon (2007), adverse environmental conditions (for example, strong bottom currents, turbid waters and the presence of a polyhaline plume) are most likely the key factors that affect the colonization patterns of fishes in artificial reefs in the north coast of the state of Rio de Janeiro (Krohling and Zalmon, 2008;Santos et al, 2010). Schmidt et al (2008) and Denadai et al (2012) determined that the reproduction and development period of Aspistor luniscutis, the most representative species in the present study, is related to the hotter months of the year and/or times with large quantities of fluvial waters, justifying the predominance of this species in the summer, corresponding to the rainy period and the period of higher flow of the Paraíba do Sul River.…”

Section: Discussionsupporting

confidence: 72%

“…Zalmon et al (2002) evaluated the possible modifications of the ichthyofauna promoted by an artificial reef composed of tires and concrete in this same area using gillnets, and of the species they found, 17 were in common with this study. In contrast, Brotto and Zalmon (2007) investigated the ichthyic assembly associated to the reef complex using the visual census technique, and because of the limitations due to low visibility, only four of the species they observed were in common with the present study. In a more recent work performed in this area by Santos et al (2010) with both sampling techniques (visual census and gillnets), 12 species were identified in common with the present study, of which the most representative species belong to the families Haemulidae and Serranidae.…”

Section: Discussionmentioning

confidence: 62%

“…Therefore, the differences in the data obtained through this ichthyofauna sampling method may be a consequence of gear limitations. However, in addition to the high local turbidity (Secchi: 0.5 m), this fishery art is traditionally applied in the north coast of the state of Rio de Janeiro by local artisanal fishermen, justifying its use in scientific investigations (Brotto and Zalmon, 2007;Franco, 2013;Santos et al, 2010;Zalmon et al, 2002). The results of this study reveal that the reef volumes of 1, 2 and 3 m 3 act distinctly on the structure of the ichthyic transient community.…”

Section: Discussionmentioning

confidence: 79%

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Influence of the artificial reef size configuration on transient ichthyofauna – Southeastern Brazil

Gatts¹,

Franco²,

Santos³

et al. 2014

Ocean & Coastal Management

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Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 79%

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Influence of the artificial reef size configuration on transient ichthyofauna – Southeastern Brazil

Gatts¹,

Franco²,

Santos³

et al. 2014

Ocean & Coastal Management

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“…As observed by Brotto & Zalmon (2007), adverse environmental conditions (for example, strong bottom currents, turbid waters and the presence of a polyhaline plume) are most likely the key factors affecting the fish colonization patterns in the north coast of Rio de Janeiro State (Krohling & Zalmon, 2008;Santos et al, 2010). The association pattern of the transient species revealed a seasonal effect, illustrating the potential effect of the Paraíba do Sul River on the artificial reef and control areas, resulting in a temporal distribution pattern of the main species and masking the spatial differences.…”

Section: Speciessupporting

confidence: 56%

The effect of an artificial reef system on the transient fish assemblages – south-eastern coast of Brazil

Rocha¹,

Franco²,

Gatts³

et al. 2014

J. Mar. Biol. Ass.

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Artificial reefs (ARs) are often used to improve fishing and, consequently, the economy of a region. However, the way in which the species use the reefs may vary between fish assemblages. An assessment was made of the influence of an AR complex on the transient fish population off the northern coast of Rio de Janeiro state and, therefore, two control areas were sampled. Gillnets were used to capture individual fish in six sampling surveys. Cumulative abundance and biomass curves (ABC) were used to assess the possible effects of the reefs on the community's functional structure. In the dry season, during which the influence of the Paraíba do Sul River is smaller, a larger richness of r-strategy species and juveniles of K-strategy species was observed in the reef area compared with the control areas, suggesting that the AR acts as a protective environment for these species. During the lower river discharge period the results indicated a potential disturbance in the functional structure of the AR fish community and, therefore, a less stable environment relative to the control areas. This 'instability' warrants a positive connotation, as it indicates that the artificial reefs are harbouring species that are particularly sensitive to predation, making the reef a powerful tool for maintaining these populations on the northern coast of Rio de Janeiro.

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“…Moreover, surveys regarding the biomass, ecology and taxonomy of phytoplankton in artifi cial reefs are scarce in the world as a whole. In Brazil, studies have focused on investigating fi sh assemblages and the development of sessile biota associated with these structures (Jardeweski & Almeida 2005;Krohling et al 2006;Brotto & Zalmon 2007).…”

Section: Introductionmentioning

confidence: 99%

Characterization of phytoplankton biodiversity in tropical shipwrecks off the coast of Pernambuco, Brazil

et al. 2010

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RESUMO -(Caracterização da biodiversidade do fi toplâncton em naufrágios tropicais da costa de Pernambuco, Brasil). A comunidade fi toplanctônica foi estudada nas adjacências de dois recifes artifi ciais (naufrágios Servemar-X e Servemar-I), na costa de Pernambuco, nordeste do Brasil, com o intuito de identifi cá-la e melhor caracterizar esses ambientes. Amostras de água foram coletadas com garrafa de Nansen em três profundidades (superfície, meio e fundo) para a análise da clorofi la a e salinidade, obtendo-se ainda dados de temperatura e transparência da água. Para coleta do fi toplâncton, um mergulhador utilizando equipamento SCUBA realizou arrastos com uma rede de 20 μm ao redor dos naufrágios a 1,5 m do fundo, por cerca de 3 minutos. A concentração de clorofi la a foi mais elevada no fundo variando entre 0,61 e 5,97 mg.m -3, com a média indicando ambiente mesotrófi co. A temperatura e a salinidade apresentaram uma pequena variação sazonal e a transparência da água mostrou um padrão sazonal e espacial estando positivamente relacionada aos teores de clorofi la a. Em relação à comunidade fi toplanctônica, o grupo das diatomáceas apareceu em maior representatividade nas amostras, seguido dos dinofl agelados, e entre as espécies sobressaiu em termos quantitativos a cianobactéria Trichodesmium thiebautii Gomont ex Gomont. A importância ecológica desses ecossistemas fi cou comprovada através dos altos índices de diversidade e equitabilidade, sendo a infl uência das águas costeiras fator determinante da estrutura e diversidade da comunidade fi toplanctônica. Palavras-chave: clorofi la a, recife artifi cial, Trichodesmium, mergulho ABSTRACT -(Characterization of phytoplankton biodiversity in tropical shipwrecks off the coast of Pernambuco -Brazil). The phytoplankton community was studied around two artifi cial reefs (shipwrecks Servemar-X and Servemar-I), located off the coast of Pernambuco, northeastern Brazil, aiming to identify and thus, better describe these environments. Water samples were collected with Nansen bottle at three depths (surface, mid-column and bottom) for chlorophyll a analysis and salinity; temperature and water transparency were also measured. To collect phytoplankton samples, a diver using SCUBA equipment carried out phytoplankton hauls with a 20 μm net around the shipwrecks, about 1.5 m from the bottom for approximatly 3 minutes. Chlorophyll a concentrations at the bottom varied between 0. 61 and 5.97 mg.m -3 , with an average that indicates a mesotrophic environment. Temperature and salinity registered small seasonal variation, while water transparency showed a seasonal spatial pattern positively related to Chl-a rates. As regards the phytoplankton community, diatoms were the most representative group in the samples, followed by dinofl agellates, and among the species, the cyanobacteria Trichodesmium thiebautii Gomont ex Gomont prevailed quantitatively. The ecological importance of these ecosystems was confi rmed by the high diversity and evenness indexes, with the infl uence of coastal...

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The effect of artificial reef structural complexity and benthic colonization on gill net fish assemblages.

Cited by 9 publications

References 9 publications

Influence of the artificial reef size configuration on transient ichthyofauna – Southeastern Brazil

Influence of the artificial reef size configuration on transient ichthyofauna – Southeastern Brazil

The effect of an artificial reef system on the transient fish assemblages – south-eastern coast of Brazil

Characterization of phytoplankton biodiversity in tropical shipwrecks off the coast of Pernambuco, Brazil

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