Long-term changes of fish assemblages associated with artificial reefs off the northern coast of Rio de Janeiro, Brazil

2015 ◽  
Vol 31 ◽  
pp. 15-23 ◽  
Author(s):  
L. Neves dos Santos ◽  
I. R. Zalmon
Keyword(s):  
Rio De Janeiro ◽  
Fish Assemblages ◽  
Artificial Reefs ◽  
Northern Coast ◽  
Long Term Changes

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

2014 ◽  
Vol 95 (3) ◽  
pp. 635-646 ◽  
Author(s):  
Diogo Fonseca Da Rocha ◽  
Marcos Alberto Lima Franco ◽  
Pedro Vianna Gatts ◽  
Ilana Rosental Zalmon
Keyword(s):  
Rio De Janeiro ◽  
Fish Assemblages ◽  
Artificial Reef ◽  
Fish Population ◽  
Artificial Reefs ◽  
Functional Structure ◽  
Eastern Coast ◽  
Northern Coast ◽  
Protective Environment ◽  
Janeiro State

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.

Long-term changes in a benthic assemblage associated with artificial reefs

Hydrobiologia ◽  
2007 ◽  
Vol 580 (1) ◽  
pp. 233-240 ◽  
Author(s):  
L. Nicoletti ◽  
S. Marzialetti ◽  
D. Paganelli ◽  
G. D. Ardizzone
Keyword(s):  
Artificial Reefs ◽  
Benthic Assemblage ◽  
Long Term Changes

Changes in diversity in the fish assemblage of a southern Australian embayment: consistent spatial structuring at decadal scales

2010 ◽  
Vol 61 (12) ◽  
pp. 1425 ◽  
Author(s):  
C. A. Jung ◽  
S. E. Swearer ◽  
G. P. Jenkins
Keyword(s):  
Temporal Variation ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Small Scale ◽  
Eastern Region ◽  
Faunal Composition ◽  
Spatial Structuring ◽  
Long Term Changes ◽  
Spatio Temporal

Comprehensive assessment of spatio–temporal variation in assemblages, particularly relating to management and conservation efforts, should include examination of variation across scales. The present study investigated spatio–temporal variation at various scales in the fish fauna of Port Phillip, Australia, over 17 years. There were significant increases in diversity and changes in faunal composition in the most recent study, compared with 17 (+38%) and 7 (+151%) years ago. No significant year-to-year differences and no fortnightly differences within a season were found, supporting the notion of long-term changes. However, inter-seasonal variation was significant, with diversity highest in summer and lowest in winter (42.3% of summer diversity), illustrating substantial variation only at particular scales. The spatial structuring of assemblages was consistent at all temporal scales over 17 years. Fish assemblages and diversity varied significantly among sites and regions, but diversity was always highest on reefs in the eastern region of Port Phillip. However, the majority of spatial variation occurred among replicate transects (up to 75% of overall variation). Despite the high degree of small-scale spatio–temporal variability, the results provide evidence of long-term changes in faunal composition and diversity within the bay. Moreover, the results underline the necessity for multi-scalar approaches in ecological studies like abundance assessments.

Long-term changes on the structure of fish assemblages in the Lobo-Broa reservoir, Brazil

2018 ◽  
Vol 22 (1) ◽  
Author(s):  
André Luís Sanchez ◽  
Kenzo Gabriel Matsubara ◽  
Evaldo Luiz Gaeta Espíndola
Keyword(s):  
Fish Assemblages ◽  
Long Term Changes

scholarly journals A long-term monitoring dataset of fish assemblages in rocky tidepools on the northern coast of Taiwan

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Lin-Tai Ho ◽  
Shen-Chih Wang ◽  
Kwang-Tsao Shao ◽  
I-Shiung Chen ◽  
Hungyen Chen
Keyword(s):  
Fish Assemblages ◽  
Northern Coast ◽  
Long Term Monitoring ◽  
Term Monitoring
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