Seasonal and spatial changes in the larval fish fauna within a large temperate Australian estuary

1992 ◽  
Vol 112 (1) ◽  
pp. 1-16 ◽  
Author(s):  
F. J. Neira ◽  
I. C. Potter ◽  
J. S. Bradley
Keyword(s):  
Larval Fish ◽  
Fish Fauna ◽  
Spatial Changes ◽  
Australian Estuary

Influence of environmental variables on the fish fauna of the deeper waters of a large Australian estuary

1987 ◽  
Vol 94 (4) ◽  
pp. 631-641 ◽  
Author(s):  
N. R. Loneragan ◽  
I. C. Potter ◽  
R. C. J. Lenanton ◽  
N. Caputi
Keyword(s):  
Environmental Variables ◽  
Fish Fauna ◽  
Australian Estuary

Spatial and seasonal differences in the fish fauna in the shallows of a large Australian estuary

1986 ◽  
Vol 92 (4) ◽  
pp. 575-586 ◽  
Author(s):  
N. R. Loneragan ◽  
I. C. Potter ◽  
R. C. J. Lenanton ◽  
N. Caputi
Keyword(s):  
Fish Fauna ◽  
Seasonal Differences ◽  
Australian Estuary

scholarly journals The Larval Fish Fauna of the “Canal de Santa Cruz” - Estuary in Northeast Brazil.

2001 ◽  
Vol 29 (2) ◽  
Author(s):  
Werner EKAU ◽  
Petra WESTHAUS-EKAU ◽  
Silvio José de MACÊDO ◽  
Christian von DORRIEN
Keyword(s):  
Larval Fish ◽  
Fish Larvae ◽  
Fish Fauna ◽  
Taxonomic Composition ◽  
Larval Abundance ◽  
Nursery Ground ◽  
Geographical Patterns ◽  
Larval Distribution ◽  
High Concentrations ◽  
Inner Channel

was investigated. The larval distribution in the channel was analysed based on 187 samples from 9 stations collected from November 1993 to May 1994. 50 of these samples were used to investigate the taxonomic composition. Larval densities varied between 0 and 376 ind. per 50 m³. Seasonal and geographical patterns were found. Both in dry and rainy season larval abundance was low at the inner channel. Except a few hauls, most samples did not exceed densities of 25 or 45 ind./50 m³, respectively. High concentrations beyond 100 ind. per 50 m³ were found at station 2, 3 and once at station 8 in the northern part and at station 7 in the southern part of the channel. Engraulidae larvae and different types of Gobiidae were the dominant groups in the channel. These two families reached almost 76% of the whole ichthyoplankton in the catches. They are followed by Achiridae, Clupeidae, Terapontidae, Sciaenidae, Tetraodontoidei, Carangidae, Syngnathidae, Cottidae (?) and Blennioidei (summing up to 95% of the caught fish larvae in the channel). Nearly all groups are found as adults in the channel. Only five families are represented exclusively by larvae: Achiriidae, Cottidae, Terapontidae, Exocoetidae and Ephippidae. From the latter, only Exocoetidae form an oceanic group. Based on the taxa composition, it is assumed, that the importance of the estuary as nursery ground for shelf and oceanic fish is low. Key words: Ichthyoplankton; estuary; larval distribution;

Monitoring Larval Fluxes through the Surf Zones of Australian Coral Reefs

1996 ◽  
Vol 47 (2) ◽  
pp. 383 ◽  
Author(s):  
P Doherty ◽  
J McIlwain
Keyword(s):  
Great Barrier Reef ◽  
Western Australia ◽  
Larval Fish ◽  
Fish Fauna ◽  
Barrier Reef ◽  
Larval Supply ◽  
Short Term ◽  
Highly Correlated ◽  
North Western ◽  
Pelagic Juveniles

The first successful trials with stationary 'crest' nets to monitor the nocturnal fluxes of larval fish crossing reef margins in both eastern and western Australia are described. Lengthy deployments were possible on Ningaloo Reef, north-western Australia, because that system is topographically suitable: i.e. a fringing barrier reef where surf produces a constant flow into a coastal lagoon. Sampling on 85 nights between October 1994 and March 1995 revealed a rich larval fish fauna (56474 individuals) dominated by pelagic juveniles nearing settlement stage. Variations in the daily catches of replicate nets (200 m apart) were highly correlated, showing the suitability of this technique for monitoring larval supply. Another trial (five nights) was made at One Tree Reef, southern Great Barrier Reef. On nocturnal flood tides, when rising water first spilled into the lagoon, triplicate nets caught many presettlement fish (47797 individuals) in this flow. The behaviour of some taxa clearly assisted their transport through the surf. Despite the successful short-term deployments at One Tree, there may be limited potential to deploy this gear elsewhere on the Great Barrier Reef because of unsuitable flow regimes.

The fish fauna of a seasonally closed Australian estuary. Is the prevalence of estuarine-spawning species high?

1993 ◽  
Vol 116 (1) ◽  
pp. 19-30 ◽  
Author(s):  
I. C. Potter ◽  
G. A. Hyndes ◽  
F. M. Baronie
Keyword(s):  
Fish Fauna ◽  
Australian Estuary

scholarly journals Influence of sediment granulometry and salinity on the composition of an estuarine fish assemblage of the Mexican Tropical Pacific

2018 ◽  
Vol 66 (3) ◽  
pp. 1065
Author(s):  
Gaspar Gonzalez-Sanson ◽  
Consuelo Maria Aguilar Betancourt ◽  
Daniel Kosonoy-Aceves
Keyword(s):  
Fish Assemblage ◽  
Linear Models ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Estuarine Fish ◽  
Spatial Changes ◽  
International Importance ◽  
Variation Explained ◽  
Crevalle Jack ◽  
Rehabilitation Needs

Barra de Navidad lagoon (BNL) is one of the main coastal wetlands in the coast of the State of Jalisco, Mexico. It is a Ramsar site (wetland of international importance) and has been included among the 81 mangrove sites with biological relevance and ecological rehabilitation needs in Mexico. Although fish fauna composition is well known in BNL, little evidence exists that support seasonal and spatial changes of fish assemblages’ structure. The hypothesis tested in this study was that there are significant seasonal and spatial changes in BNL fish assemblages’ composition which can be explained, at least partially, by changes in salinity, water temperature and sediment’s granulometry. Fish assemblages were sampled monthly from October 2012 to September 2013 at four zones of BNL, using gill nets (7.62 mm stretched mesh). A sample was taken every month in a randomly selected area of each zone. Prior to each sampling operation, water salinity and temperature were measured using an YSI-30 probe. Samples of sediment were collected with a Van Veen grab sampler in three randomly selected points of each zone for granulometry and organic matter analyses. A total of 2 026 individuals belonging to 48 species were collected. Slightly more than 90 % of all caught fish belonged to nine species: Peruvian mojarra (Diapterus brevirostris), Pacific crevalle-jack (Caranx caninus), White mullet (Mugil curema), Blue sea-catfish (Ariopsis guatemalensis), Oval flounder (Syacium ovale), Pacific lined sole (Achirus mazatlanus), Yellowfin mojarra (Gerres simillimus), Pacific bumper (Chloroscombrus orqueta) and Freckled porcupinefish (Diodon holocanthus). Generalized linear models yielded significant differences among zones for the mean abundance of each of these nine species, but only in two cases seasonal differences were significant (D. brevisrostris and C. caninus). Permutational multivariate analysis of variance yielded also significant differences among zones and between seasons for the composition of the fish assemblage. Redundancy analysis using salinity, temperature and percentage mud in sediment as environmental variables, showed that fish assemblage’s composition varies along two main gradients defined by mud fraction of sediments in a small spatial scale (~ 3 km) and salinity in a seasonal scale. Percentage of variation explained by canonical axes was less than 25 %, indicating that other factors could be influencing changes in assemblage composition. As most species appear as juveniles in the lagoon, fluctuations in their abundances could be linked, at least partially, with recruitment events.

Sign in / Sign up

Export Citation Format

Share Document