Seasonal Horizontal and Vertical Distribution Patterns of the Supralittoral Amphipod Trinorchestia trinitatis in Relation to Environmental Variables

1997 ◽  
Vol 17 (4) ◽  
pp. 674 ◽  
Author(s):  
Tatsuaki Tsubokura ◽  
Seiji Goshima ◽  
Shigeru Nakao
Keyword(s):  
Vertical Distribution ◽  
Environmental Variables ◽  
Distribution Patterns ◽  
Horizontal And Vertical Distribution

scholarly journals Patterns of distribution and abundance of larval phosichthyidae (actinopterygii, stomiiformes) in southeastern Brazilian waters

2011 ◽  
Vol 59 (3) ◽  
pp. 213-229 ◽  
Author(s):  
Cássia Gôngora Goçalo ◽  
Mario Katsuragawa ◽  
Ilson Carlos Almeida da Silveira
Keyword(s):  
Vertical Distribution ◽  
Water Column ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Distribution Patterns ◽  
Southeastern Brazil ◽  
Patterns Of Distribution ◽  
Oceanic Region ◽  
Brazil Current ◽  
Horizontal And Vertical Distribution

Horizontal and vertical distribution patterns and abundance of larval phosichthyids were investigated from oblique and depth-stratified towns off Southeastern brazilian waters, from São Tomé cape (41ºW.; 22ºS.) to São Sebastião island (45ºW.; 24ºS.). The sampling was performed during two cruises (January/2002 -summer; August/2002 -winter). Overall 538 larvae of Phosichthyidae were collected during summer and 158 in the winter. Three species, Pollichthys mauli, Vinciguerria nimbaria and Ichthyioccoccus sp. occurred in the area, but Ichthyioccoccus sp. was extremely rare represented by only one specimen, caught in the oceanic region during the summer. Geographically, larval were concentrated in the oceanic region, and vertically distributed mainly between the surface and 80 m depth in the summer and winter. Larvae were more abundant during the night, performing a diel vertical migration in the water column. The results suggest that the meandering and eddies of Brazil Current play important role on the transport and distribution patterns of larval phosichthyids over the oceanic and neritic area in the Southeastern Brazil.

Hypotheses on Southern Ocean peracarid evolution and radiation (Crustacea, Malacostraca)

2000 ◽  
Vol 12 (3) ◽  
pp. 269-275 ◽  
Author(s):  
A. Brandt
Keyword(s):  
Southern Ocean ◽  
Vertical Distribution ◽  
Evolutionary Biology ◽  
Distribution Patterns ◽  
Short Summary ◽  
Horizontal And Vertical Distribution ◽  
Key Questions

A short summary of some the most important hypotheses on the evolution of Southern Ocean peracarid crustaceans and some of the potential reasons for the high biodiversity of this taxon is presented. Besides the knowledge of horizontal and vertical distribution patterns of Southern Ocean peracarids, the importance of the evolution of the notothenioid fishes on the evolution of the Peracarida is discussed. Key questions for a better understanding of evolutionary biology of Southern Ocean Peracarida are highlighted.

Horizontal and vertical distribution patterns, retention rates, and population dynamics of zooplankton on Western Bank, Scotian Shelf

2003 ◽  
Vol 60 (10) ◽  
pp. 1229-1244 ◽  
Author(s):  
Christian S Reiss ◽  
Ian A McLaren ◽  
Patricia Avendaño
Keyword(s):  
Population Dynamics ◽  
Vertical Distribution ◽  
Spatial Scales ◽  
Distribution Patterns ◽  
Zooplankton Biomass ◽  
Retention Rates ◽  
Local Production ◽  
Scotian Shelf ◽  
Particle Retention ◽  
Horizontal And Vertical Distribution

We assess the importance of retention rates and local production to the concentration of zooplankton on Western Bank, Scotian Shelf, during September and October 1998. We do so using (i) particle retention rates derived from an array of 25 current meters and inferences from hydrographic structure; (ii) observations on the horizontal and vertical distribution of zooplankton and ichthyoplankton; and (iii) a simple projection-matrix model of the population dynamics of two copepod species, Centropages typicus and Pseudocalanus spp. Zooplankton biomass and adult stages of copepods were more abundant in surface waters on the bank (p < 0.05) at broad (25 km) spatial scales. Zooplankton was correlated with ichthyoplankton abundance at this scale (r > 0.5, p < 0.001), a result of local production of both zooplankton and fish on the bank. The time-dependent anticyclonic circulation around Western Bank was variable, and particle retention rates were 18 and 33% for 20 days at 12.5 and 28.5 m, respectively. The population model showed that both C. typicus and Pseudocalanus spp. are capable of increasing their population size despite advective loss and mortality rates approaching 10%·day-1. We conclude that local production exceeding advective loss rates can explain the high concentrations of zooplankton on Western Bank.

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