Evaluation of Fish Diversity and Water Quality in a Tropical Freshwater Ecosystem: A Case Study from Lakshmipuram LEvaluation of Fish Diversity and Water Quality in a Tropical Freshwater Ecosystem: A Case Study from Lakshmipuram Lake, Andhra Pradesh, India | Chapter 7 | Research Perspective on Biological Science Vol. 3ake, Andhra Pradesh, India | Chapter 7 | Research Perspective on Biological Science Vol. 3

Freshwater fishes are one of the most threatened taxonomic groups that are due to degradation and defragmentation of habitats, introduction of exotic species, pollution, and global climate change. Lakshmipuram Lake, a tropical freshwater lake situated in India, plays a crucial role in maintaining ecological balance and sustaining local livelihoods. The present study investigates the ichthyofaunal diversity and water quality of Lakshmipuram Lake, located in the Anakapalli District of Andhra Pradesh, India, over a one-year period from January 2024 to December 2024. A total of 47 fish species were recorded from various sampling sites across the lake. Freshly collected specimens were cleansed, photographed, and preserved in 9–10% formalin solution, followed by identification through classical taxonomic techniques. The ichthyofauna comprised 12 different orders, among which Cypriniformes was the most dominant with 18 species (37%), followed by Siluriformes (10 species, 21%), Perciformes (3 species, 4%), and other minor orders such as Channiformes, Cichliformes, Anguilliformes (each 3 species, 6%), and so on. Regarding the population status, 11 species (23%) were categorised as abundant, 25 species (53%) as common, 4 species (8%) as moderate, and 7 species (14%) as rare. Based on the IUCN Red List (2024), 36 species (77%) were classified as Least Concern (LC), 8 species (16%) as Near Threatened (NT), 2 species (4%) as Not Evaluated (NE), and 1 species (2%) as Data Deficient (DD). In addition to biological assessment, 12 key physico-chemical parameters were analysed—including temperature, pH, dissolved oxygen, BOD, COD, turbidity, total dissolved solids, electrical conductivity, nitrate, phosphate, hardness, and alkalinity—to evaluate the water quality and its influence on fish diversity. Biodiversity indices were also calculated to quantify species diversity and distribution. The Species Richness was notable with 47 species, while the Shannon-Wiener Diversity Index averaged 2.765, indicating high species diversity. Pielou’s Evenness Index averaged 0.769, reflecting a high level of evenness in species distribution across sites. Lakshmipuram Lake is a biologically rich and ecologically important freshwater habitat, supporting a diverse and balanced fish community. The good water quality and high diversity indices emphasise the lake’s potential as a sustainable aquatic ecosystem.

 

Author (s) Details

Gudabandi Vijaya Pratap
Dr. V. S. Krishna Degree and PG College (A), Visakhapatnam, Andhra Pradesh-530013, India.

 

Tulasi Bhushan Rao
Dr. V. S. Krishna Degree and PG College (A), Visakhapatnam, Andhra Pradesh-530013, India.

 

Yamala Shanti Prabha
Dr. V. S. Krishna Degree and PG College (A), Visakhapatnam, Andhra Pradesh-530013, India.

 

Bora Keerthana
Dr. V. S. Krishna Degree and PG College (A), Visakhapatnam, Andhra Pradesh-530013, India.

 

Palaka Lakshman
Dr. V. S. Krishna Degree and PG College (A), Visakhapatnam, Andhra Pradesh-530013, India.

 

 

Please see the book here:- https://doi.org/10.9734/bpi/rpbs/v3/5380

Culture Mixed-Sex and Monosex of Tilapia in Ponds in Mexico City: Comparative Study | Chapter 5 | Current Research Trends in Biological Science Vol. 3

In this study the growth of Oreochromis niloticus both mixed sex and males sexually reversed were
analyzed in concrete ponds in the FES Zaragoza, UNAM, under the environmental conditions o f the
Mexico City. The experiment was carried from May to November 2013, in two concrete ponds of 50
m2. Similar feeding regime and stocking density of fish were maintained for the culture systems.
Different growth parameters like body weight, length, daily weight gain (DWG), specific growth rate
(SGR), feed conversion rate (FCR), Fulton’s condition index (K) and survival were analyzed during six
months culture period. It was found that culture with monosex males tilapias yielded the highest
weight, length, DWG, SGR compared to mixed sex populations tilapias. Water quality was monitored
along the experiment. Based on the results, there were statistically significant differences in size (W =
20942.5, p<0.05) and weight (W = 21413.0, p< 0.05) between the divisions of the pond. The initial
total length used was 1.2 cm and ended with 20.4 cm for monosex males, higher than mixed-sex
population. The initial average body weight of the fish was 0.21 g and they recorded 192.2 g at the
end of culture for monosex males. The weight-length relationship for both populations of fish was
positive allometric. The percentage gain in body weight and total length averaged were 150% and
31.8% respectively. Specific growth rates in weight and length for monosex males were higher than
mixed-sex population. Daily weight gain and size was similar in both populations. The FCR had a
mean value of 1.9:1 for monosex males and condition factor (K) had an average of 1.45 for mixed-sex
population. Water quality indicate good oxygenation (> 5 mg/L), warm water (> 20°C), productive
(<100 mg/L CaCO3) and slightly basic (pH>8). Acceptable growth of fish and a yield of 3 ton/ha/6
months were obtained in both two ponds; therefore, the culture of tilapia under conditions of Mexico
City is recommended.

Author(s) Details

Dr. J. L. Gómez-Márquez
Laboratorio de Limnología, Facultad de Estudios Superiores Zaragoza, UNAM, C.P. 09230, Mexico

B. Peña-Mendoza
Laboratorio de Limnología, Facultad de Estudios Superiores Zaragoza, UNAM, C.P. 09230, Mexico.

J. L. Guzmán-Santiago
Laboratorio de Limnología, Facultad de Estudios Superiores Zaragoza, UNAM, C.P. 09230, Mexico.

View Book :- http://bp.bookpi.org/index.php/bpi/catalog/book/216