We determined site suitability by conducting a discriminant analysis for each species using presence/absence data across sites as the response parameter, and 14 site-specific habitat characteristics (including an index of fishing pressure; Table S2) as predictor variables.
However, few experiments were conducted to examine changes in hematological indices of fish exposed to microcystins that are believed to be fatal to circulatory systems of vertebrates.
Table 4 Taxa richness, diversity, evenness, and dominance indices of fishes of Ajijiguan creek in the Niger Delta collected between November 2010 and December 2011 Site 1 Site 2 Site 3 Number of Taxa 30 36 35 No. of individuals 517 575 777 Simpson dominance 0.932 0.950 0.952 Shannon diversity 3.065 3.275 3.279 Evenness_e^H/S 0.714 0.734 0.759 Margalef (Taxa richness) 4.641 5.508 5.508.
To date, fishing effort has been largely described using catch metrics and indices of fishing capacity, e.g., horsepower [13].
Adjustment was made for age; gestation; region of residence; number of children; family structure; history of depression; family history of depression; smoking; secondhand smoke exposure at home and at work; job type; household income; education; body mass index; and intake of fish and yogurt.
cAdjustment for age; gestation; region of residence; number of children; family structure; history of depression; family history of depression; smoking; secondhand smoke exposure at home and at work; employment; household income; education; body mass index; and intake of fish and yogurt.
Age; gestation; region of residence; number of children; family structure; history of depression; family history of depression; smoking; secondhand smoke exposure at home and at work; job type; household income; education; body mass index; and consumption of fish and yogurt were selected a priori as potential confounding factors.
Akinrotimi et al. (2012) assessed the most toxic level of cypermethrin as 0.25 mg/L in their experiment on Clarias Gariepinus and suggested that exposure to cypermethrin could cause some level of stress as indicated by changes in the hematological indices of the fish under consideration.
Catch per unit of effort (CPUE) needs to be standardized to remove the effects of factors such as fishing time and location, before it can be used as an index of abundance in fish stock assessments.
The present study was designed mainly to examine the interactive effects of waterborne metals (Cd, Zn, Cu, Ag, and Ni) in specific binary combinations on short-term (3 h) gill metal binding and essential ion (Ca2+ and Na+) uptake (a physiological index of toxicity) in fish, using juvenile freshwater rainbow trout (Oncorhynchus mykiss) as the model species.
