scholarly journals The effects of ecoregions and local environmental characteristics on spatial patterns in boreal riverine fish assemblages

2020 ◽  
Vol 29 (4) ◽  
pp. 739-751
Author(s):  
Teppo Vehanen ◽  
Tapio Sutela ◽  
Anna Harjunpää
Keyword(s):  
Spatial Patterns ◽  
Fish Assemblages ◽  
Environmental Characteristics ◽  
Riverine Fish

scholarly journals ICHTHYOFAUNA IN THE INNER CONTINENTAL SHELF NEXT TO THE PARANAGUÁ ESTUARINE COMPLEX, SOUTHERN BRAZIL

2021 ◽  
Vol 46 (4) ◽  
pp. 1-13
Author(s):  
Cesar SANTOS ◽  
Roberto SCHWARZ JUNIOR ◽  
Helen Audrey PICHLER ◽  
Olímpio Rafael CARDOSO ◽  
Marcelo Renato LAMOUR ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Temporal Variations ◽  
Otter Trawl ◽  
Rainfall Regime ◽  
Wet Season ◽  
Environmental Characteristics ◽  
The North ◽  
Inner Continental Shelf

The composition and structure of fish assemblages in the inner continental shelf of the Paraná State are affected by cold fronts and the rainfall regime. Data from fishing activities in this region, as well as the analysis of environmental characteristics, are the main tools available for understanding fish dynamics, under influence of increasing human activities. In order to better understand patterns and temporal variations in fish assemblages in the inner continental shelf of the Paraná State, a total of 24 double trawls were performed with an otter trawl between August 2000 and July 2001, in two sampling areas, the North area in front of the northern mouth of the Paranaguá Estuary Complex, and the South area, in front of the Leste beach. A total of 45,277 fish specimens belonging to 35 families and 97 species were caught. Sciaenidae was the most abundant family, with 37.1% of the total number of individuals caught, and with the highest richness (18 species). Statistical analyses evidenced significant differences in environmental characteristics and in fish fauna, and that both areas disturbances were observed in the fish assemblages during the dry and wet season, being more intense in the Southern area, disturbances that would be related to the shrimp fishing present in the two areas sampled in this study.

Fish assemblages of the northern Argentine coastal system: spatial patterns and their temporal variations

2006 ◽  
Vol 15 (4) ◽  
pp. 326-344 ◽  
Author(s):  
ANDRÉS J. JAUREGUIZAR ◽  
ROBERTO MENNI ◽  
CARLOS LASTA ◽  
RAÚL GUERRERO
Keyword(s):  
Spatial Patterns ◽  
Fish Assemblages ◽  
Temporal Variations ◽  
Coastal System

Spatially based methods to assess the ecological status of riverine fish assemblages in European ecoregions

2007 ◽  
Vol 14 (6) ◽  
pp. 441-452 ◽  
Author(s):  
S. SCHMUTZ ◽  
A. MELCHER ◽  
C. FRANGEZ ◽  
G. HAIDVOGL ◽  
U. BEIER ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Ecological Status ◽  
Riverine Fish

Corrigendum to: Depth-related composition and structuring of tropical riverine fish assemblages revealed by baited video

2017 ◽  
Vol 68 (10) ◽  
pp. 1976
Author(s):  
Stephen Cousins ◽  
Mark J. Kennard ◽  
Brendan C. Ebner
Keyword(s):  
Fish Assemblages ◽  
Cost Effective ◽  
Water Clarity ◽  
Sampling Effort ◽  
Underwater Video ◽  
Video Footage ◽  
Eastern Australia ◽  
North Eastern ◽  
Lutjanus Argentimaculatus ◽  
Riverine Fish

The aim of the present study was to determine whether boat-based deployment of remote underwater video cameras is effective for surveying fish assemblages in the deepest reaches of two large tropical rivers in north-eastern Australia. In addition, we compared fish assemblages recorded on baited versus unbaited cameras, and evaluated the sampling effort (duration of recording) required to estimate fish assemblages using remote underwater videos. We found that fish assemblages differed according to the depth, with statistically significant differences largely attributable to the prevalence of small-bodied species (Ambassis sp., Melanotaenia sp. and Pseudomugil signifer recorded in shallow (0.4–2.0m) and intermediate (2.1–4.9m) depths, and larger-bodied fish species (>10cm TL), such as Lutjanus argentimaculatus, Mesopristes argenteus and Caranx sexfasciatus, in deep water (>5.0m). Estimates of fish assemblage attributes generally stabilised after 60min recording duration, suggesting that interrogation of video footage beyond this duration may not be cost-effective. We conclude that depth is an important consideration when surveying large and deep river fish assemblages and that where water clarity is favourable, underwater video provides one of the means by which an assemblage can be investigated across the entire depth profile.

Correspondence between spatial patterns in fish assemblages in ohio streams and aquatic ecoregions

1986 ◽  
Vol 10 (6) ◽  
pp. 815-828 ◽  
Author(s):  
David P. Larsen ◽  
James M. Omernik ◽  
Robert M. Hughes ◽  
Christina M. Rohm ◽  
Thomas R. Whittier ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Fish Assemblages ◽  
Aquatic Ecoregions

Spatial patterns of lacustrine fish assemblages in a catchment of the Mississippi Alluvial Valley

2014 ◽  
Vol 24 (5) ◽  
pp. 634-644 ◽  
Author(s):  
Caroline S. Andrews ◽  
L. E. Miranda ◽  
Daniel B. Goetz ◽  
Robert Kröger
Keyword(s):  
Spatial Patterns ◽  
Fish Assemblages ◽  
Mississippi Alluvial Valley ◽  
Alluvial Valley
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