scholarly journals Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river

2021 ◽  
Vol 92 (0) ◽  
pp. 923433
Author(s):  
Valentin Mar-Silva ◽  
Yvonne Herrerías-Diego ◽  
Martina Medina-Nava ◽  
Juan Pablo Ramírez-Herrejón ◽  
Luis Mendoza-Cuenca ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Fish Assemblage ◽  
Assemblage Structure ◽  
Spatial And Temporal Variation ◽  
Fish Assemblage Structure

scholarly journals Spatial and temporal variation of fish assemblage associated with aquatic macrophyte patches in the littoral zone of the Ayapel Swamp Complex, Colombia

2017 ◽  
Vol 29 (0) ◽  
Author(s):  
Carlos Mario Marín Avendaño ◽  
Néstor Jaime Aguirre Ramírez
Keyword(s):  
Temporal Variation ◽  
Environmental Conditions ◽  
Fish Assemblage ◽  
Littoral Zone ◽  
Aquatic Macrophyte ◽  
Abundant Species ◽  
Assemblage Structure ◽  
Spatial And Temporal Variation ◽  
Suitable Habitat ◽  
Fish Assemblage Structure

Abstract: Aim The purpose of the present study was to examine spatial and temporal variation in fish assemblage structure associated with aquatic macrophytes in the littoral zone of the ASC. Methods Specimens were caught between January 2008 and February 2009, over four limnimetric moments, using both cast net and seine net. Data on the temperature, electrical conductivity, pH and dissolved oxygen was recorded for the characterization of the water mass in the sites. Results A total of 34,151 specimens from 44 species were collected. The most abundant species were Eigenmannia virescens, Astyanax caucanus, Astyanax fasciatus, Roeboides dayi and Cyphocharax magdalenae, which together accounted for more than 75% of the sample. Temporal and spatial comparisons showed variation in the environmental conditions and highlighted the existence of heterogeneous abiotic conditions (p<0.05). However, the multiple comparisons test showed the existence of homogeneous spatial conditions (p>0.05) regarding the fish assemblage structure. The multivariate analysis showed no significant relationship between existing environmental conditions and the fish assemblage (p=0.04). The analysis also showed the absence of a relationship between the fish assemblage and environmental variables with respect to the flood pulse and sampling sites (p>0.05). Conclusion The uniformity of the fish communities that inhabit aquatic macrophyte patches in the littoral region of the ASC may be related to the availability of suitable habitat in structural terms, that probably supports a more abundant and varied wildlife.

scholarly journals Spatial and temporal variation in fish-assemblage structure in isolated waterholes during the 2001 dry season of an arid-zone floodplain river, Cooper Creek, Australia

2005 ◽  
Vol 56 (1) ◽  
pp. 25 ◽  
Author(s):  
Angela H. Arthington ◽  
Stephen R. Balcombe ◽  
Glenn A. Wilson ◽  
Martin C. Thoms ◽  
Jon Marshall
Keyword(s):  
Temporal Variation ◽  
Fish Assemblage ◽  
Fish Assemblages ◽  
Arid Zone ◽  
Dry Season ◽  
Assemblage Structure ◽  
Spatial And Temporal Variation ◽  
Fish Assemblage Structure ◽  
Floodplain River ◽  
Floodplain Inundation

Spatial and temporal variation in fish-assemblage structure within isolated waterholes on the floodplains of Cooper Creek, Australia, was studied during the 2001 dry season, a period of natural drought in this arid-zone river. Spatial variation in fish-assemblage structure and the abundance of five species in disconnected waterholes early in the dry season (April 2001) were related to the extent of floodplain inundation 14 months previously, and to the interconnectedness of waterholes and waterhole habitat structure. As the dry season progressed, waterhole volumes decreased owing to evaporative water loss and structural habitat elements (anabranches, bars, boulders) became exposed. Marked changes in fish assemblage structure between the early (April) and late (September) dry season were related to habitat loss but not to water chemistry. Interactions between flow and habitat across a nested hierarchy of spatial scales (the floodplain, the waterhole and habitat patches within waterholes) were crucial to the persistence of fish assemblages through the 2001 dry season. We conclude that the magnitude, timing and frequency of floodplain inundation and natural variations in waterhole volume must be maintained if we wish to sustain the distinctive habitats and fish assemblages of this arid-zone floodplain river.

scholarly journals Correlations Between Fish Assemblage Structure and Environmental Variables of Taruwa Pond in Nawalparasi District, Province No. 4, Nepal

2021 ◽  
Vol 11 (1) ◽  
pp. 1-8
Author(s):  
JASH HANG LIMBU ◽  
KESHI CHAUDHARY
Keyword(s):  
Temporal Variation ◽  
Fish Assemblage ◽  
Environmental Variables ◽  
Fish Assemblages ◽  
Mesh Size ◽  
Assemblage Structure ◽  
Fish Assemblage Structure ◽  
Fish Community Structure ◽  
Water Parameters ◽  
Analysis Of Similarity

The correlations between fisheries diversity and environmental variables of Nepal’s Pond are poorly understood. This study aims to investigate temporal variation of fish assemblage at Taruwa Pond in Nawalparasi district, Province no. 4, Nepal from October 2018 to April 2019. For the fish agglomeration, cast net of 4 kg in weight and 3.80 m in length and 22.5 m breadth with 12 mm mesh size was used. In total, 579 individuals representing 16 fish species, 10 families, and 12 genera were recorded. According to similarity percentage analysis, the most contributory species were Puntius ticto (27.92%) followed by Danio devario (12.06%), Puntius terio (9.76%), Badis badis (7.31%), Lepidocephalichthys guntea (5.57%) and Puntius sophore (5.57%). Analysis of similarity suggested that fish community structure was significantly different in temporal variation (R = 0.321, p<0.01). Based on the cluster analysis, fish assemblages were isolated into two distinct groups at Bray-curtis similarity. The Canonical Correspondence Analysis distinctly indicated that the water parameters of dissolved oxygen, carbon-dioxide, depth, and water temperature play an important role in influencing the fish assemblage structure of Taruwa Pond.

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