Fish community structure in relation to environmental variables within the Sacramento River basin and implications for the greater Central Valley, California

Although the Aiuruoca River is recognized as a very important area for fish fauna, the species composition of this river remains unknown or restricted to technical reports of licensing projects. The aim of this study was to describe the composition and distribution of the ichthyofauna in the Aiuruoca River basin. Fifty-eight collection points were sampled along the Aiuruoca River basin during 2010 and 2011, including 38 streams, 11 lagoons and 9 points along the Aiuruoca River main channel. A total of 8562 specimens were collected belonging to 6 orders, 15 families, 33 genera and 47 species. The pirapetinga fish (Brycon nattereri) is listed on Brazil’s endangered species, and the rainbow trout (Oncorhynchus mykiss) was the only exotic species captured. Altitude is one of the main factors that influence fish community structure in the Aiuruoca River basin, confirming its importance for fish conservation

Download Full-text

The relationship between reef fish community structure and environmental variables in the southern Mexican Caribbean

Journal of Fish Biology ◽

10.1111/j.1095-8649.1998.tb01028.x ◽

1998 ◽

Vol 53 (sA) ◽

pp. 209-221 ◽

Cited By ~ 51

Author(s):

E. Núñez Lara ◽

E. Arias González

Keyword(s):

Community Structure ◽

Reef Fish ◽

Environmental Variables ◽

Fish Community ◽

Fish Community Structure ◽

Mexican Caribbean ◽

Reef Fish Community ◽

The Relationship

Download Full-text

Assessing temporal shifts in lotic fish community structure in the upper Red River basin, Oklahoma

Journal of Freshwater Ecology ◽

10.1080/02705060.2017.1420703 ◽

2018 ◽

Vol 33 (1) ◽

pp. 129-138 ◽

Cited By ~ 1

Author(s):

Trevor A. Starks ◽

Anthony W. Rodger ◽

Donnie King ◽

Matthew Skoog

Keyword(s):

Community Structure ◽

River Basin ◽

Fish Community ◽

Red River ◽

Fish Community Structure ◽

Red River Basin ◽

Temporal Shifts

Download Full-text

Fish Community Structure and Environmental Correlates in Nepal’s Andhi Khola, Province No. 4, Syangja

Borneo Journal of Resource Science and Technology ◽

10.33736/bjrst.2510.2020 ◽

2020 ◽

Vol 10 (2) ◽

pp. 85-92

Author(s):

Jash hang Limbu ◽

BISHNU BHURTEL ◽

ASHIM ADHIKARI ◽

PUNAM GC ◽

MANIKA MAHARJAN ◽

...

Keyword(s):

Community Structure ◽

Spatial Variation ◽

Fish Assemblage ◽

Environmental Variables ◽

Fish Community ◽

Mesh Size ◽

Fish Diversity ◽

Fish Assemblage Structure ◽

Fish Community Structure ◽

Significant Difference

The study of correlations between fish diversity, environmental variables and fish habitat aspects at different space and time scales of Nepal’s rivers and streams is scanty. This study investigated spatial and temporal patterns of fish assemblage structure in Nepal’s Andhi Khola. The field survey was conducted from September 2018 to May 2019 and the fishes were sampled from three sites using a medium size cast net of mesh size ranging from 1.5 to 2.5 cm and gill net having 2-3 cm mesh size, 30-35 feet length and 3-4 feet width, with the help of local fisher man. A total of 907 individuals representing 15 species belonged to four orders, six families and 11 genera were recorded during the study time. To detect the feasible relationships between fish community structure and environmental variables, we executed a Canonical Correspondence Analysis (CCA). Based on similarity percentage (SIMPER) analysis, the major contributing species are Barilius barila (26.15%), Barilius vagra (20.48%), Mastacembelus armatus (8.04%), Puntius terio (6.64%), and Barilius bendelisis (5.94%). One-way analysis similarity (ANOSIM) tried out for both time and space variations in fish community structure suggested that there was a significant difference in temporal variation (R = 0.794, P = 0.0037) but no significant difference in spatial variation (R = -0.18, P = 0.923). Results from the Canonical Correspondence Analysis (CCA) vindicated that dissolved oxygen, free carbon-dioxide and total hardness were the principle physio-chemical correlates of fish assemblage structure. One-way analysis of similarity (ANOSIM) on the Non-metric Multidimensional Scaling (NMDS) showed significant difference between spring, autumn and winter season but no significant difference was found in spatial variation. The extraction and transportation of boulders, cobbles, pebbles, sand mining, haphazard ongoing road development and dam construction for the irrigation without fish ladders were found to be existing threats to the fish diversity of Andhi Khola. Keywords: Fish assemblage, multivariate analysis, rivers, spatio-temporal, streams

Download Full-text

How do spatial and environmental factors affect the fish community structure in seasonally flooded karst systems?

Latin American Journal of Aquatic Research ◽

10.3856/vol48-issue2-fulltext-2420 ◽

2020 ◽

Vol 48 (2) ◽

pp. 268-279

Author(s):

Joel Loera-Pérez ◽

José L. Hernández-Stefanoni ◽

Xavier Chiappa-Carrara

Keyword(s):

Community Structure ◽

Environmental Factors ◽

Environmental Variables ◽

Fish Community ◽

Saturation Temperature ◽

Spatial And Temporal Variation ◽

Western Coast ◽

Fish Community Structure ◽

Principal Coordinates ◽

Seasonally Flooded

Spatial and temporal variation of the physical and chemical conditions of coastal karst wetland ecosystems, which annually range from flooded to completely dry, generate a very dynamic fish community structure. We assessed the relative influence of spatial dependence and environmental factors on fish community structure in a seasonally flooded tropical karst system on the north-western coast of the Yucatan Peninsula, Mexico. Sampling was carried out between November 2009 and April 2010, while the area was inundated by seasonal floodwater. Fish biomass, abundance and species richness, as well as environmental variables and geographic location, were recorded. A variation partitioning analysis was performed to assess the influence of the spatial and environmental variables on the fish community using multiple regression, and a principal coordinates analysis of neighbor matrices (PCNM). Spatial factors had a greater influence on the changes in the community structure than the environmental factors. After spatial variation, environmental effects from conductivity, oxygen saturation, temperature and depth further shaped the community. These results imply that, despite the diversity of niches and wide variation in environmental conditions, the structuring force of the community is the spatial dynamic probably linked to species dispersal mechanisms and reproductive strategies.

Download Full-text