scholarly journals Spatial dynamics of the Argentine sandperch, Pseudopercis semifasciata (Pinguipedidae), in temperate rocky reefs from northern Patagonia, Argentina

2014 ◽  
Vol 65 (1) ◽  
pp. 39 ◽  
Author(s):  
Leonardo A. Venerus ◽  
Alejo J. Irigoyen ◽  
David E. Galván ◽  
Ana M. Parma
Keyword(s):  
Spatial Dynamics ◽  
Reef Fishes ◽  
Conservation Strategies ◽  
Small Scale ◽  
Rocky Reef ◽  
San Jose ◽  
Northern Patagonia ◽  
Reef Fish Assemblage ◽  
Rocky Reefs ◽  
Rocky Reef Fish

The choice of appropriate conservation strategies for reef fishes depends on their mobility, degree of site fidelity and residence times. Here we report the results of a small-scale mark–recapture and resighting study conducted to investigate the spatial dynamics of the Argentine sandperch, Pseudopercis semifasciata. This is the flagship species of the rocky-reef fish assemblage from northern Patagonia, which has been the target of uncontrolled fishing since the early 1950s. About 19% of the fish tagged were recaptured up to four years after tagging. In total, 180 of 218 recaptured fish stayed in the reef of tagging. Thirty-six of 57 recaptures made at known locations within popular fishing areas of San José Gulf, densely covered by patchy reefs, occurred within 100 m of the tagging site, up to 793 days after tagging. Six fish were recovered more than 1 km from where they were tagged. Smaller fish were more prone to relocate, and were recovered farther from the tagging site. Fish stayed in the reefs for periods longer than a year; larger males remained longer in the same reefs. Our results indicate that relatively small reserves (in the order of a few kilometres) could be effective at protecting P. semifasciata populations within the northern Patagonian gulfs.

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 Reef fish community structure on three islands of Itaipu, Southeast Brazil

2008 ◽  
Vol 6 (2) ◽  
pp. 267-274 ◽  
Author(s):  
José Policarpo de Mendonça-Neto ◽  
Cassiano Monteiro-Neto ◽  
Luiz Eduardo Moraes
Keyword(s):  
Environmental Gradients ◽  
Seasonal Pattern ◽  
Reef Fishes ◽  
Habitat Characteristics ◽  
Brazilian Coast ◽  
Rocky Reef ◽  
Fish Community Structure ◽  
Rocky Reefs ◽  
Chain Link ◽  
One Year

We provide here the first assessment of the composition, abundance and distribution of rocky reef fishes of Itaipu Sound, Rio de Janeiro, off the southeastern Brazilian coast. Monthly visual censuses, benthic quadrats and chain link transects were conducted over one year on rocky reefs at three islands (Menina, Mãe and Pai). A total of 2466 individual fish, belonging to 29 families and 42 species were recorded. The most abundant fish species were Parablennius pilicornis, Haemulon steindachneri, Orthopristis ruber and Diplodus argenteus. Sheltered and complex habitats showed the most abundant and diverse fish populations. There was a major significant separation between sampling sites and a secondary seasonal pattern. The three sites showed similar fish communities with locally structured environmental gradients according to their inherent habitat characteristics.

scholarly journals Diel rhythms in shallow Mediterranean rocky-reef fishes: a chronobiological approach with the help of trained volunteers

2012 ◽  
Vol 93 (2) ◽  
pp. 461-470 ◽  
Author(s):  
Ernesto Azzurro ◽  
Jacopo Aguzzi ◽  
Francesc Maynou ◽  
Juan José Chiesa ◽  
Dario Savini
Keyword(s):  
Marine Species ◽  
Reef Fishes ◽  
Rocky Reef ◽  
Natural Environments ◽  
Rocky Shores ◽  
Natural Systems ◽  
The Hours ◽  
Sarpa Salpa ◽  
Reef Fish Species ◽  
Rocky Reef Fish

Behavioural rhythms in marine species have been mostly investigated in laboratory organisms and their expression within the animals' natural environments remains largely unknown. Here, we studied diel (i.e. 24-hours-based) and intra-diel (i.e. 12-hours-based) rhythmic variations in the abundance of seven shallow rocky-reef fish species, namely Coris julis, Epinephelus marginatus, Sarpa salpa, Serranus cabrilla, Serranus scriba, Sparisoma cretense and Thalassoma pavo, along the rocky shores of Linosa Island (Mediterranean Sea). Data were visually collected by trained volunteers along fixed transects at 3-hourly intervals throughout six consecutive 24-hours periods. Density estimates can vary greatly between consecutive days and during 24-hours periods according not only to the major day–night changeover but also to minor intra-diel variations at the daylight hours. In the case of T. pavo, C. julis, S. cabrilla and S. salpa waveform analyses showed midday troughs in abundance within the 24-hours period but significant variation within the hours of daylight was highlighted only for T. pavo. Although results were not conclusive at the intra-dial level, the employment of volunteers represented a valuable tool for chronobiology, suitable to improve our understanding of fish behaviour in natural systems.

Temporal patterns of settlement, recruitment and post-settlement losses in a rocky reef fish assemblage in the South-Western Mediterranean Sea

2013 ◽  
Vol 160 (9) ◽  
pp. 2337-2352 ◽  
Author(s):  
F. C. Félix-Hackradt ◽  
C. W. Hackradt ◽  
J. Treviño-Otón ◽  
A. Pérez-Ruzafa ◽  
J. A. García-Charton
Keyword(s):  
Mediterranean Sea ◽  
Reef Fish ◽  
Fish Assemblage ◽  
Temporal Patterns ◽  
Western Mediterranean ◽  
Rocky Reef ◽  
The South ◽  
Reef Fish Assemblage ◽  
Western Mediterranean Sea ◽  
Rocky Reef Fish

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

2018 ◽  
Vol 46 (1) ◽  
pp. 197-211 ◽  
Author(s):  
Felippe Daros ◽  
Leonardo Bueno ◽  
Marcelo Soeth ◽  
Athila Bertoncini ◽  
Mauricio Hostim ◽  
...  
Keyword(s):  
Reef Fish ◽  
Fish Assemblage ◽  
Assemblage Structure ◽  
Rocky Reef ◽  
Fish Assemblage Structure ◽  
Southern Brazil ◽  
Reef Fish Assemblage ◽  
Rocky Reef Fish

Feeding ecology of the temperate marine fish Achoerodus viridis (Labridae): Size, seasonal and site-specific differences

1995 ◽  
Vol 46 (7) ◽  
pp. 1009 ◽  
Author(s):  
BM Gillanders
Keyword(s):  
Feeding Ecology ◽  
Feeding Rate ◽  
New South ◽  
Juvenile Fish ◽  
Rocky Reef ◽  
Rocky Reefs ◽  
South Wales ◽  
Labrid Fish ◽  
Harpacticoid Copepods ◽  
Rocky Reef Fish

Fish were collected from localities in the Sydney region, New South Wales, Australia, from March 1991 to September 1993. Achoerodus viridis is a benthic carnivore and consumes a wide variety of prey items. Size-specific differences in diet were found. The diet of recruits (17-26 mm SL) collected in seagrass environments was dominated by tanaids, whereas that of rocky reef recruits was dominated by harpacticoid copepods. The diet of rocky reef fish then shifted to gammarid amphipods and other crustaceans (fish 50-150 mm SL) and to mussels and urchins (fish >300 mm SL). Juvenile fish on rocky reefs (450 mm SL) foraged in shallow fringing habitat, whereas adult fish (>200 mm SL) foraged in deeper turf and barrens habitats, reflecting the depth distribution of the species. Feeding rate of larger fish tended to be less than that of smaller fish. Variations in diet and feeding rate were also detected over the year but the patterns were not consistent between years. Among sites, there were differences in diet but these were not related to the position of sites inside an estuary or on the open coast. The results of this study provide information on the feeding ecology of a large labrid fish; this information will aid in understanding the population dynamics of the species.

scholarly journals The reproductive biology of Pinguipes brasilianus Cuvier, 1829 (Osteichthyes: Pinguipedidae) in temperate rocky reefs of Argentina

2015 ◽  
Vol 13 (4) ◽  
pp. 733-744 ◽  
Author(s):  
Gabriela L. Villanueva-Gomila ◽  
Gustavo J. Macchi ◽  
Martín D. Ehrlich ◽  
Alejo J. Irigoyen ◽  
Leonardo A. Venerus
Keyword(s):  
Reproductive Biology ◽  
Gonadosomatic Index ◽  
Ovary Development ◽  
Rocky Reef ◽  
Austral Spring ◽  
Southwest Atlantic ◽  
Multiple Spawner ◽  
Rocky Reefs ◽  
Close Proximity ◽  
Rocky Reef Fish

ABSTRACT Pinguipes brasilianus is a conspicuous and abundant rocky-reef fish inhabiting the Northern Patagonian gulfs of Argentina, Southwest Atlantic. This study describes its reproductive biology in this region. We made macroscopic and histological descriptions of the testis and ovary development, analyzed the evolution of the gonadosomatic index (GSI) in both sexes throughout the year, and estimated fecundity and length at 50% maturity for females. Pinguipes brasilianus is a multiple spawner with indeterminate annual fecundity and an extended reproductive season, encompassing austral spring and summer. Low GSI values in males (monthly means ranged between 0.11% and 0.75%) and low relative fecundity in female fish (between 2 and 44 oocytes/g) are consistent with a need of close proximity between male and female during oocyte fertilization, sexual courtship and with spawning in pairs and/or within reef crevices. The estimated length at 50% maturity (± SD) for females was 15.22 ± 0.43 cm total length. Although P. brasilianus shares the main reproductive features of its congeneric species Pinguipes chilensis , male GSI and female length at 50% maturity in P. brasilianus were markedly lower than those reported for P. chilensis , while relative and batch fecundity were greater in fish of the same size.

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