scholarly journals Network of small no-take marine reserves reveal greater abundance and body size of fisheries target species

2018 ◽  
Author(s):  
Fernanda A. Rolim ◽  
Tim Langlois ◽  
Pedro F. C. Rodrigues ◽  
Todd Bond ◽  
Fábio S. Motta ◽  
...  
Keyword(s):  
Body Size ◽  
Reef Fish ◽  
Survey Methods ◽  
Marine Reserves ◽  
Habitat Model ◽  
Rocky Reef ◽  
Habitat Variability ◽  
Rocky Reefs ◽  
Stereo Video ◽  
Rocky Reef Fish

AbstractNo-take marine reserves (NTRs), i.e. areas with total fishing restrictions, have been established worldwide aiming to provide biodiversity and ecosystem conservation. Brazil has established NTRs, but currently lacks scientific knowledge and understanding of their ecological role, particularly regarding rocky reefs in subtropical regions. Consequently, this study aimed to contrast NTR, from the 30 year old Tupinambás Ecological Station, and comparable fished sites across a coastal biogeographic gradient to investigate the effect of fishing and habitat variability on the abundance and body-size of rocky reef fish. We used Baited Remote Underwater stereo-Video (stereo-BRUVs) and Diver Operated stereo-Video (stereo-DOVs) systems to simultaneously sample reef fish and habitat. Model selection and results identified habitat and biogeographic variables, such as distance from shore, as important predictor variables, explaining several aspects of the fish assemblage. The effect of protection was important in determining the abundance and body-size of targeted species, in particular for epinephelids and carangids. Conversely, species richness was correlated with habitat complexity and not with protection status. This is the first study to publish data using these novel survey methods in the Southeastern Atlantic and demonstrate their utility, in combination with an established network of NTR’s, to provide benchmarks for conservation and fisheries management.

Multi-scale spatial heterogeneity, habitat structure, and the effect of marine reserves on Western Mediterranean rocky reef fish assemblages

2004 ◽  
Vol 144 (1) ◽  
pp. 161-182 ◽  
Author(s):  
J. A. Garc�a-Charton ◽  
�. P�rez-Ruzafa ◽  
P. S�nchez-Jerez ◽  
J. T. Bayle-Sempere ◽  
O. Re�ones ◽  
...  
Keyword(s):  
Spatial Heterogeneity ◽  
Reef Fish ◽  
Habitat Structure ◽  
Fish Assemblages ◽  
Marine Reserves ◽  
Western Mediterranean ◽  
Rocky Reef ◽  
Multi Scale ◽  
Rocky Reef Fish

scholarly journals Using no-take marine reserves as a tool for evaluating rocky-reef fish resources in the western Mediterranean

2013 ◽  
Vol 70 (3) ◽  
pp. 578-590 ◽  
Author(s):  
Josep Coll ◽  
Antoni Garcia-Rubies ◽  
Gabriel Morey ◽  
Olga Reñones ◽  
Diego Álvarez-Berastegui ◽  
...  
Keyword(s):  
Reef Fish ◽  
Carrying Capacity ◽  
Spatial Scales ◽  
Marine Reserves ◽  
Conservation Status ◽  
Western Mediterranean ◽  
Habitat Characteristics ◽  
Rocky Reef ◽  
Fish Resources ◽  
Rocky Reef Fish

Abstract Coll, J., Garcia-Rubies, A., Morey, G., Reñones, O., Álvarez-Berastegui, D., Navarro, O., and Grau, A. M. 2013. Using no-take marine reserves as a tool for evaluating rocky-reef fish resources in the western Mediterranean). - ICES Journal of Marine Science, 70: 578–590. The use of MPAs to recover fish stocks in littoral areas of the western Mediterranean has made it possible to obtain time dataseries on the biomass evolution over the last decade. The biomass of six fully protected MPAs increased between two- and threefold over a period of five years. After this time the biomass remained stable. This pattern allowed us to adjust logistic curves between the biomass and protection time, and to estimate the carrying capacity (K) of each site. In the present study we investigate the relationships between carrying capacity (K) and habitat characteristics at each protected site. The relationships between habitat/environmental variables and K are analysed by applying generalized linear models. Environmental descriptors showing major effects on biomass are related to depth, exposure, rugosity, and offshore slope at different spatial scales. Comparison of observed and predicted values using the model for exploited sites in the Balearic Islands made it possible to determine their conservation status. This empirical approach to the relationships between environmental factors and fish assemblage biomass could constitute a very useful tool when traditional fishery management based on catch and effort data from the artisanal and recreational fleets is difficult to apply.

scholarly journals Rocky reef fish assemblage structure in coastal islands of Southern Brazil

2015 ◽  
Vol 2 ◽  
Author(s):  
Daros Felippe ◽  
Bueno Leonardo ◽  
Soeth Marcelo ◽  
Bertoncini Athila ◽  
Hostim-Silva Mauricio ◽  
...  
Keyword(s):  
Reef Fish ◽  
Fish Assemblage ◽  
Assemblage Structure ◽  
Rocky Reef ◽  
Fish Assemblage Structure ◽  
Southern Brazil ◽  
Reef Fish Assemblage ◽  
Rocky Reef Fish

scholarly journals Spatial, temporal and ontogenetic variation in the association of fishes (family Labridae) with rocky-reef habitats

2011 ◽  
Vol 62 (7) ◽  
pp. 870 ◽  
Author(s):  
Jason K. Morton ◽  
William Gladstone
Keyword(s):  
Fish Assemblages ◽  
Spatial Scales ◽  
Abundant Species ◽  
Habitat Associations ◽  
Rocky Reef ◽  
Habitat Variability ◽  
Life History Stages ◽  
Multiple Spatial Scales ◽  
Habitat Specialisation ◽  
Rocky Reefs

Habitat variability is an important factor structuring fish assemblages of rocky reefs in temperate Australia. Accepting the generality of this model requires that habitat-related variation is consistent through time, across multiple spatial scales, and applies to all life-history stages. We used repeated underwater visual surveys at multiple spatial scales over a 22-month period to test whether three distinct rocky-reef habitats had different wrasse assemblages and whether these assemblages were subject to spatial, temporal and ontogenetic variability. Overall, the strongest and most consistent habitat association was with sponge gardens, which had the most distinct assemblage, and the greatest species richness and density of individuals. Habitat associations in fringe and barrens were less consistent. A substantial increase in the abundance of small individuals, coinciding with warmer sea temperatures, contributed to temporal fluctuations in the density of wrasses. Overall, habitats were not strongly partitioned among larger individuals of the most abundant species, suggesting that adults are largely habitat generalists whereas small, recruiting individuals showed greater habitat specialisation. The present study emphasises the importance of incorporating spatial, temporal and ontogenetic variability into surveys of fish assemblages to understand more fully the dynamics of temperate rocky-reef systems.

Spatiotemporal variation in the structure of reef fish and macroalgal assemblages in a north-east Atlantic kelp forest ecosystem: implications for the management of temperate rocky reefs

2018 ◽  
Vol 69 (4) ◽  
pp. 525 ◽  
Author(s):  
Pablo Pita ◽  
Diana Fernández-Márquez ◽  
Juan Freire
Keyword(s):  
Reef Fish ◽  
Fish Assemblages ◽  
Kelp Forest ◽  
Habitat Destruction ◽  
Kelp Forests ◽  
Rocky Reef ◽  
Laminaria Hyperborea ◽  
East Atlantic ◽  
North East ◽  
Rocky Reefs

Temperate rocky reefs and kelp forest ecosystems have been severely affected by overfishing, pollution and habitat destruction, and climate change is a major driver of kelp decline in many regions. Although necessary for management, ecological interactions between kelp and fish remain largely unknown in the north-east Atlantic. In the present study, underwater visual censuses (UVC) and univariate and multivariate multiple regression models were used to analyse the spatiotemporal variations in the abundance and habitat use of the rocky reef fish and macroalgae assemblages of Galicia (north-west Spain). The underwater seascape was dominated by large rocks and kelp forests of Laminaria hyperborea, L. ochroleuca and Saccorhiza polyschides. Fish assemblages were ruled by gadids, labrids and sparids. The most frequent fish species were Labrus bergylta (counted in 90% of UVC) and Pollachius pollachius (in 100% of UVC), whereas the most abundant were Boops boops (mean±s.d., 556.4±39.7 individuals ha–1) and L. bergylta (432.10±440.05 individuals ha–1). Fish and macroalgal assemblages showed different spatial preferences and responded strongly to seasonality, wave exposure and depth. To a lesser degree, fish and macroalgal assemblages showed preferences for habitat structure. Moreover, because the findings of the present study indicate that L. bergylta is a good indicator species of the health of rocky reef and kelp forests ecosystems, monitoring of this fish can be helpful for management and conservation actions.

Assessment of rocky reef fish assemblages close to seaweed farming

2015 ◽  
Vol 48 (2) ◽  
pp. 481-493 ◽  
Author(s):  
Leonardo Lara de Carvalho ◽  
Eduardo Godoy Aires de Souza ◽  
Mauricio Roque da Mata Júnior ◽  
Roberto Campos Villaça
Keyword(s):  
Reef Fish ◽  
Fish Assemblages ◽  
Rocky Reef ◽  
Seaweed Farming ◽  
Rocky Reef Fish

Nearshore environmental conditions influence larval growth and shape changes for a temperate rocky reef fish

Hydrobiologia ◽  
2019 ◽  
Vol 839 (1) ◽  
pp. 159-176 ◽  
Author(s):  
Mauricio F. Landaeta ◽  
Valentina Bernal-Durán ◽  
Manuel I. Castillo ◽  
Macarena Díaz-Astudillo ◽  
Bastián Fernández-General ◽  
...  
Keyword(s):  
Reef Fish ◽  
Environmental Conditions ◽  
Larval Growth ◽  
Rocky Reef ◽  
Temperate Rocky Reef ◽  
Rocky Reef Fish ◽  
Shape Changes
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