Structure and dynamics of Gobiidae larvae (Teleostei, Perciformes) in a tropical estuary: seasonal relationships with tidal cycles

2014 ◽  
Vol 94 (7) ◽  
pp. 1557-1568 ◽  
Author(s):  
Eduardo A.P. Gomes ◽  
Ana C.T. Bonecker
Keyword(s):  
Rainy Season ◽  
Fish Larvae ◽  
Abiotic Factors ◽  
River Estuary ◽  
River Mouth ◽  
Temporal Distribution ◽  
Mesh Size ◽  
Distribution Patterns ◽  
Flood Tide ◽  
Estuarine System

This study aims to describe the spatial and temporal distribution patterns of Gobiidae larvae at a tropical estuarine system in south-east Brazil (Macaé). The samples were collected in six stations, through oblique hauls using a bongo net (330 µm mesh size), coupled to a flowmeter, during the night in the ebb and flood tides in March, July and October 2006 and in February 2007. In the Macaé River estuary was collected a total of 1,234 Gobiidae larvae, representing nine taxa. The highest densities occurred in the river mouth during the flood tide in the rainy season. The most abundant groups were: Gobiosoma parri, Gobionellus oceanicus and Ctenogobius boleosoma. Gobiosoma parri was also dominant at the Macaé estuary, which also presented higher densities in the coastal stations during the rainy season (March), both the flood as the ebb tide. Gobionellus oceanicus and Ctenogobius boleosoma were characteristic of the dry season in the mouth and river stations during the flood tide. The abiotic factors chlorophyll-a and temperature were considered biologically significant for Gobiidae larvae distribution. The spatial and seasonal variations together with the tide influence the distribution of the fish larvae Gobiidae family in the Macaé River estuary and its coastal zone.

scholarly journals Spatial And Temporal Distribution Patterns Of Larval Sciaenids In The Estuarine System And Adjacent Continental Shelf Off Santos, Southeastern Brazil

2014 ◽  
Vol 62 (2) ◽  
pp. 149-164 ◽  
Author(s):  
Renata Roque Porcaro ◽  
Maria de Lourdes Zani-Teixeira ◽  
Mario Katsuragawa ◽  
Cláudia Namiki ◽  
Márcio Hidekazu Ohkawara ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Abiotic Factors ◽  
Temporal Distribution ◽  
Distribution Patterns ◽  
Southeastern Brazil ◽  
Estuarine System ◽  
Frequency Of Occurrence ◽  
Reproductive Process ◽  
Average Abundance ◽  
Estuarine Region

Based on data collected during the project "The influence of the Santos-São Vicente estuarine system on the ecosystem of the adjacent continental shelf" (ECOSAN), from Nov/2004 to Mar/2006, the space-temporal distribution pattern of Sciaenidae larvae in relation to biotic and abiotic factors was investigated. Bongo net was used for sampling, aboard the R/V "Prof. W. Besnard" on the shelf, and the boats "Veliger II" and "Albacora" in the estuarine region. Twelve taxa were identified: Bairdiella ronchus, Ctenosciaena gracilicirrhus, Cynoscion spp., Isopisthus parvipinnis, Macrodon atricauda, Micropogonias furnieri, Menticirrhus spp., Nebris microps, Ophioscion punctatissimus, Paralonchurus brasiliensis, Stellifer rastrifer and Stellifer spp. Sciaenidae larvae were widespread on the continental shelf in both campaigns (frequency of occurrence >80%). They were most abundant in Mar/2006 (mean = 6.47 larvae.m-2; sd = 8.36) and least abundant in Sep/2005 (mean = 2.37 larvae.m-2; sd = 3.33). The average abundance in the estuarine region ranged from 0.12 larvae.m-2 (sd = 0.11) in Jun/2005 to 4.28 larvae.m-2 (sd = 1.99) in Nov/2004. Frequency of occurrence minimum occurred in Aug/2005 (50%) and the maximum in Nov/2004 (100%). The presence of Sciaenidae larvae in most locations and periods suggests that the reproductive process of this family in the region is continuous, spawning being more intense in the warmer months.

scholarly journals Cladocerans (Branchiopoda) of a tropical estuary in Brazil

2005 ◽  
Vol 65 (1) ◽  
pp. 107-115 ◽  
Author(s):  
M. N Paranaguá ◽  
S Neumann-Leitão ◽  
J. D Nogueira-Paranhos ◽  
T. A. Silva ◽  
T. Matsumura-Tundisi
Keyword(s):  
Rainy Season ◽  
High Tide ◽  
River Estuary ◽  
River Mouth ◽  
Mesh Size ◽  
Marine Species ◽  
Wide Distribution ◽  
Average Density ◽  
Chemical Pollution ◽  
Tropical Estuary

The study was conducted in the Capibaribe river estuary in Recife (Brazil) to assess the role played by cladocerans in a eutrophic environment. Samplings were carried out monthly at 4 fixed stations along the estuary from July 1987 to June 1988. Collections were made with a plankton net of 65 micrometers mesh size. Six cladocerans species were registered: Penilia avirostris, Diaphanosoma spinulosum, Chydorus barroisi, Ceriodaphnia rigaudi, Ilyocryptus spinifer, and Moina micrura. The most frequent species was Moina micrura with 49%. The only true marine species was Penilia avirostris, which was registered at station 1 (close to the river mouth), during high and low tide and in the dry season. The Cladocera average density decreased from 329 ind.m-3 (August 1987, high tide) to 2 ind.m-3 (March 1988, high tide) due to the high load of organic and chemical pollution received by the estuary. At all stations, D. spinulosum, M. micrura, and C. barroisi occurred with a wide distribution, mainly during the rainy season. C. rigaudi and I. spinifer were rare, occurring only during the rainy season. Cladocerans played an important role in the food webs of the plankton community of the Capibaribe tropical estuary and the dominance of a few small species indicated a hypereutrophic environment. A high level of disturbance was indicated by the decline in diversity of specialized species and the increase in abundance of opportunistic species like M. micrura.

scholarly journals DISTRIBUCIÓN Y DENSIDAD DE ICTIOPLANCTON EN EL ESTUARIO DE BAHÍA MÁLAGA, PACÍFICO COLOMBIANO (SEPTIEMBRE DE 2009-FEBRERO DE 2010)

2016 ◽  
Vol 43 (1) ◽  
Author(s):  
Diana Medina Contreras ◽  
Jaime Cantera ◽  
Eugenia Escarria ◽  
Luz M Mejía Ladino
Keyword(s):  
Fish Assemblages ◽  
Larval Fish ◽  
Fish Larvae ◽  
Larval Density ◽  
Temporal Distribution ◽  
Mesh Size ◽  
Temporal Variations ◽  
Taxonomic Composition ◽  
Total Density ◽  
The Relationship

The density, taxonomic composition, and spatial and temporal distribution of the estuarine ichthyoplankton of Bahía Málaga (Pacific coast of Colombia) are described, as well as the relationship between biological parameters and some physicochemical variables. Samples were collected at 12 stations along the principal navigation canal; these samples were taken in four areas following the design of Barletta-Bergan. Surface sweeps were carried out with a conical-cylindrical net (mesh size 500 µm, mouth diameter 0.6 m, length 3.5 m). Salinity and temperature were measured before each sweep. A total of 69019 larvae/1000 m³, representing 23 families, 36 genera and 40 species were collected during monthly sampling from September, 2009 to February, 2010. Carangidae (39.0%) was the most abundant family, followed by Sciaenidae (27.1%) and Engraulidae (20.1%). The most frequent families were Sciaenidae (26.6%), followed by Carangidae (22.8%) and Engraulidae (14.7%) which are important families in larval fish assemblages in tropical estuaries. Eighty percent of total density was provided by six species, of which Seriola morphotype 1 (Carangidae) and Cetengraulis mysticetus (Engraulidae) were the most abundant and dominant. No correlation was found between density and salinity (Spearman, R = 0.23) or temperature (Spearman, R = 0.51). Analysis of spatial and temporal variations of larval density shows significant differences among the months sampled (Anova, p = 0.0029; p < 0.05), but not among areas (Anova, p = 0.078), suggesting that Bahía Málaga offers adequate conditions for the presence of fish larvae.

Seasonal movement and size distribution of three commercially important Australian prawn species (Crustacea : Penaeidae) within an estuarine system

1983 ◽  
Vol 34 (5) ◽  
pp. 727 ◽  
Author(s):  
RG Coles ◽  
JG Greenwood
Keyword(s):  
Life Histories ◽  
Salt Water ◽  
River Mouth ◽  
Distribution Patterns ◽  
Estuarine System ◽  
Rainfall Runoff ◽  
Seasonal Movement ◽  
Southern Half ◽  
Commercially Important ◽  
Abiotic Stimuli

Three penaeid prawn species, Penaeus plebejus Hesse, Metapenaeus bennettae Racek & Dall, and M. macleayi (Haswell), were sampled using a beam trawl, at four sites for 16 months in the Noosa River, Queensland, and data collected are used to provide generalized life histories for the three species and to discuss the composition and timing of the commercial bait prawn fishery. P. plebejus individuals were recruited to the river throughout the year, M. bennettae between March and June, and M. macleayi between April and July. P. plebejus juveniles remained only briefly in the river and were most numerous at sites near the river mouth. There was no distinct period of migration of this species from the river. M. bennettae and M. macleayi individuals remained in the river until December and March, respectively, when, in the absence of obvious abiotic stimuli such as rainfall runoff and reduced salinities, there was a marked egress from the river. While in the river, both of these species could be caught through the zone of salt-water penetration up to 35 km from the sea, and both were most numerous in the southern half of Lake Cootharaba in a zone of approximately 19 × 10-3 mean salinity. Similarity between these and other distribution patterns recorded in topographically different rivers suggests salinity is an important determining factor in the distribution of these prawns.

scholarly journals Planktonic rotifers from a tropical estuary under high marine influence (Passos River, PE, Brazil).

2014 ◽  
Vol 42 (3) ◽  
Author(s):  
Simone JORGE FILHO ◽  
Sigrid NEUMANN-LEITÃO ◽  
Tâmara De Almeida e SILVA ◽  
Mauro De MELO JÚNIOR
Keyword(s):  
Rainy Season ◽  
Brachionus Plicatilis ◽  
Statistical Tests ◽  
River Estuary ◽  
Mesh Size ◽  
Northeastern Brazil ◽  
Light Extinction ◽  
Physical Parameters ◽  
Salinity Regime ◽  
Light Extinction Coefficient

Passos River estuary, which is very influenced by marine waters, were carried out monthly from August/2009 to September/2010. A 64µm mesh size plankton net was hauled during low tide at two fixed stations in spring tides. Physical parameters as temperature, salinity, transparency and light extinction coefficient were obtained simultaneously. Statistical tests (Man-Whitney) were performed to evaluate possible seasonal and spatial variations. The rotifers were represented by only four species. Although there was no significant seasonal variation, the highest abundances were registered in the rainy season, with an expressive predominance of Brachionus plicatilis Müller, 1786. However, a population pick was registered in the dry season (September/2009; 13182,03 org.m-3 ) and the lowest value was registered in the rainy season (2010 May; 7,56 org.m-3 ). Brachionus plicatilis Müller, 1786 was highlighted as salinity indicator as well as its extremely opportunistic condition in eutrophic ecossistems, while Rotaria rotatoria (Pallas, 1766) and Rotaria sp. indicated organic pollution. Due to the constant high salinity regime the estuary showed few species richness. Keywords: Indicator, Rotifers, Salinity, Northeastern Brazil.

scholarly journals Temporal variability of fish larvae assemblages: influence of natural and anthropogenic disturbances

2012 ◽  
Vol 10 (4) ◽  
pp. 837-846 ◽  
Author(s):  
David A. Reynalte-Tataje ◽  
Evoy Zaniboni-Filho ◽  
Andrea Bialetzki ◽  
Angelo A. Agostinho
Keyword(s):  
Water Flow ◽  
Temporal Variability ◽  
Fish Larvae ◽  
River Mouth ◽  
Temporal Distribution ◽  
Dam Impact ◽  
Environment Variables ◽  
Lower Temperature ◽  
River Mouths ◽  
Second Period

Natural and induced disturbances greatly influence the temporal distribution of ichthyoplankton abundance. This study assesses and compares the temporal variability of fish larvae assemblages in controlled and free environments to determine the influence of environment variables on the main taxa in these systems. The study was conducted at the Chapecó (without dam impact) and Ligeiro (with dam impact) river mouths, which are located in the upper Uruguay River. Samples were made between October 2001 and March 2004 during three reproductive periods. The larvae assemblages were composed of small and medium-sized Characiformes and Siluriformes. The variation in the distribution of larvae was mainly temporal (>85%). When the three reproductive periods were compared, it was observed in the second period, characterized by a larger water flow and a lower temperature, that there was a reduction in abundance, a lower number of taxa, an absence of stages in post-flexion and a high dissimilarity in larvae assemblage structure. In general, the environmental variables of water flow and temperature most influenced the distribution of egg and larvae abundance. In the studied area, a smaller temporal variability was observed in the structure of larvae assemblages at the sampling sites in the Chapecó River mouth than in in the Ligeiro River mouth under the influence of dams.

scholarly journals Spatial and temporal distribution of fish larvae in marginal lagoons of Pantanal, Mato Grosso State, Brazil

2010 ◽  
Vol 8 (1) ◽  
pp. 123-134 ◽  
Author(s):  
Karina Keyla Tondato ◽  
Lúcia Aparecida de Fátima Mateus ◽  
Simoni Ramalho Ziober
Keyword(s):  
Fish Larvae ◽  
Abiotic Factors ◽  
Larval Density ◽  
Temporal Distribution ◽  
Water Transparency ◽  
Spatial And Temporal Distribution ◽  
Mato Grosso ◽  
Zooplankton Density ◽  
Depth Water ◽  
Distribution Of Fish

An analysis was made of the spatial and temporal distribution of the abundance and composition of fish larvae assemblies, aiming to ascertain correlations with biotic and abiotic factors in marginal lagoons of the Cuiabá River floodplain in Brazil's Pantanal wetlands. Samples were collected bimonthly in the pelagic region of the marginal lagoons (fourteen lagoons) close to the littoral zone covered by aquatic macrophytes from December 2006 to April 2007. The captured individuals consisted of 2,739 larvae, represented predominantly by Triportheus spp. (Characidae), Parodontidae, Anostomidae, Characidae and Serrasalmidae. Larval density varied among the sample lagoons in December, but the biotic (zooplankton density) and abiotic (water temperature, electrical conductivity, dissolved oxygen, pH, water transparency and lagoon depth) factors did not significantly affect larval composition and abundance. Larvae were captured throughout the sample period, with the highest densities occurring in December and early January. Temporally, lagoon depth, water transparency and fluviometric level showed a negative correlation with larval density. Both the zooplankton and the larval density vary positively, responding likewise to the environmental conditions imposed by flooding. The highest larval density was also found to coincide with the first rains (early December), when the rainfall has not yet reached its peak.

scholarly journals Impacts of the construction of the Port of Suape on phytoplankton in the Ipojuca River estuary (Pernambuco-Brazil)

2003 ◽  
Vol 46 (1) ◽  
pp. 73-82 ◽  
Author(s):  
Maria Luise Koening ◽  
Enide Eskinazi Leça ◽  
Sigrid Neumann-Leitão ◽  
Silvio José de Macêdo
Keyword(s):  
High Tide ◽  
River Estuary ◽  
River Mouth ◽  
Mesh Size ◽  
Marine Species ◽  
Cylindrotheca Closterium ◽  
Port Implantation ◽  
Marine Littoral ◽  
The Impact ◽  
Port Construction

In order to address the impact on phytoplankton, sampling was conducted monthly at 4 fixed stations, from April/86 to March/87 at diurnal low and high tide using a plankton net (65 mum mesh size) and a 1 L Van Dorn bottle. Among the 133 taxa identified, marine littoral euryhaline species were most common, outranking Gyrosigma balticum (Ehrenberg) Rabenhorst, Nitzschia sigma (Kützing) Wm. Smith, Licmophora abbreviata Agardh, Climacosphenia moniligera Ehrenberg, Surirella febigerii Lewis, Terpsinoe musica Ehrenberg and Cylindrotheca closterium (Ehrenberg) Reiman and Lewis. The port construction caused significant changes to the phytoplankton community with a strong influence of marine species (mainly dinoflagellate) because of the opening of the reef near the river mouth in 1983. The shallow depth and hydrodynamic brought many littoral species to the water columm. The community was composed by marine euryhaline and limnetic organisms, influenced by the salinity, rain and tide. Species diversity was high (> 3 bits.cel-1) owing to the high environmental heterogeneity (marine, freshwater and benthic interactions). After the port implantation, a strong decrease occurred in phytoplankton density owing to high loads of suspended matter. Lowest values (121,00 cells.l-1) were registered during rainy season. During dry season, when light intensity was higher, phytoplankton presented highest density ( 1,789,000 cells.l-1).

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