Plankton Distribution and Diversity in Tropical Earthen Fish Ponds

Abstract

Our knowledge of the consumption of plankton by fish is still fragmentary. Trophic links between fish and plankton are often loose because plankton is a changing assemblage of pelagic organisms of valuable nutritional value. The objectives of the study were to determine the distribution and diversity of planktons in the fish ponds. Water samples for plankton analysis were collected monthly (January-December), along with water samples used for the determination of physico-chemical parameters in 250 ml bottles in Ponds 1, 2 and 5. The freshwater sample was mixed gently and pipetted into 5 ml plankton chamber containing 2 drops of Lugol's solution. The Lugol's solution which served as fixative also enhanced sedimentation of the organisms and was left overnight before analyzing plankton using Zeiss inverted plankton microscope and plankton determination keys. Data was analyzed using Shannon-Weaner diversity index, species richness, means and analysis of varians (ANOVA). The results showed that the highest species richness for dry season phytoplankton value of 27 was recorded in Pond 2, with the highest Shannon-Weaner diversity index value of 0.5401 in pond 5. Merismopaedia elegans with 3,434 in pond 2 was the most abundant phytoplankton species and chlorophyceae the most dominant taxa. The rainy season zooplankton species richness values (5 in pond 2) were higher than that of the dry season (3 in pond 3) with the highest Shannon-Weaner index value of 0.3501 recorded in pond 1. The most abundant zooplankton species Asplanchna species 57 was recorded in pond 2. Significant differences (p < 0.05) was observed for phytoplankton and zooplankton species between the ponds. Physico-chemical parameters had influence on the distribution and diversity of planktons in the fish ponds.

Diversity of Mix Microalgae in Fish Tanks under Different Weather Conditions

“…The Bacillariophyta was the second dominant division, while other divisions of phytoplankton exist in some seasons and with insignificant proportions for example Dinophyta, Crysophyta, and Euglenophyta. A Similar assemblage of algae Chlorophyta reported by Ikpi et al, (2013) in the Tropical Earthen Fish Ponds. A high abundance of Chlorophyta was found in wet weather with a moderate temperature (Suresh et al, 2011), this abundance might happen as a result of the cloudy weather and dilution due to rain (Paulette et al, 2011).…”

Phytoplankton biodiversity trends in nanobubble aerated shrimp farming at Probolinggo coast, East Java, Indonesia

“…Whereas, the DO resulted from nanobubble treatment has the highest values in comparison to DO yielded from other aeration treatments, and the DO levels were also affecting the H'. In this study, recorded phytoplankton H' was observed higher than the results from Ikpi et al (2013) and Utojo and Mustafa (2016). To conclude, the nanobubble aeration treatment can be used as a solution to improve water quality and increase phytoplankton diversity and abundance in brackish water shrimp ponds.…”

The Community Structure of Phytoplankton in Seagrass Ecosystem and its Relationship with Environmental Characterstics

“…The shape of the bay that was enclosed and looked like a big fish pond resulted in relatively uniform characteristics. Such characteristic resulted in the domination of diatom group (Ikpi et al, 2013;Akter et al, 2015). The enclosed environment and the many fisheries activities have limited space, not fluent water circulation and the organic residues made the environment more selective for the growth of phytoplankton species.…”