Studies have showed that fish community structure in neotropical floodplains can be influenced by environmental variables such as pH, dissolved oxygen, hypoxia tolerance, depth and transparency.
I have studied fishery based farmers climate induced crisis management,
there I could able to see some factors like sea water temp, light intensity wind velocity and PH are the major factors.
DEAR ARAJUO
I HOPE THIS HELPS YOU.
International Journal of Ecology Volume 2016 (2016), Article ID 1598701, 10 pages http://dx.doi.org/10.1155/2016/1598701
Research Article
Environmental Determinants Influencing Fish Community Structure and Diversity in Two Distinct Seasons among Wetlands of Northern Region (Ghana)
Collins Ayine Nsor1 and Edward Adzesiwor Obodai2
1Department of Ecotourism and Forest Recreation, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana 2Department of Fisheries and Aquatic Sciences, University of Cape Coast, University Post Office, Cape Coast, Ghana
Received 6 November 2015; Revised 14 February 2016; Accepted 28 February 2016
Academic Editor: Jean-Guy Godin
Copyright © 2016 Collins Ayine Nsor and Edward Adzesiwor Obodai. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Fish community structure was assessed in six wetlands using cast nets, to correlate with environmental variables with diversity and distribution patterns, from 2010 to 2012. A total of 2,239 individuals belonging to 44 species and 1,938 individuals belonging to 40 species were sampled in the dry and wet seasons. Mochokid and Mormyrid families dominated fish community and constituted 14.8%, respectively, followed by Alestids (12.9%) and Chlariids (11.1%). Rarer taxons were centropomids, channids, malapteruds, and oesteoglossids and represented 1.9%, respectively. Overall, CPUE per net did not vary significantly (Tukey HSD test, ) in the dry and wet seasons. Wuntori marsh consistently showed dominance in mean monthly CPUE per net (dry = ; wet = seasons), while Bunglung constructed wetland was the least recorded (dry = ; wet = seasons). Fish diversity and richness differed significantly (, ) among seasons. Environmental disturbances were season-specific and did not differ significantly (, , ) among sites. A DCA ordination explained 69% variability in fish distribution patterns, while PCA showed that 81.8% of nitrate-nitrogen, phosphate, and grazing intensity on axis 1 and conductivity, temperature, and turbidity on axis 2 influenced fish community structure. Wetland conservation must be promoted to sustain fish abundance and overall ecosystem stability.
I belive pH, BOD, COD, temperature, turbidity, TS, TDS, and seasons might be important factors. You might estimate their marginal impacts on the response variable using an OLS framework. However, already published article could also be helpful.
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