Computational study of Richness and Diversity Indices of fish species in rivers and other wetland areas and fish marketplaces under Kurigram District, Banglades

The present study revealed that a total of 101 indigenous species of large fish (28 species) and Small Indigenous fish (73 species) belonging to 63 genera and 31 families were observed and identified while 17 exotic fish species were found under 5 families. Among the indigenous species, the highest number of species were found in family Cyprinidae and Bagridae with a relative diversity of 28.28% and 11.11%. In case of group species richness, highest number 27 fish species were found in catfish group followed by 12 species of carp, 8 species of each barbs and minnows, 6 species of eel fish, 8 species of loaches, 4 species of each prawn, snake-headed or airbreathing fish and glass perches, 3 species of each climbing perches and clupeid, 2 species of each goby fish, knifefish and puffer fish, and rest of the group true perch, leaf fish, halfbeak fish, Needlefish, mullet fish, anchovies and killifish has one species. Of the total species, 47 species were considered as least concerned, 10 species as vulnerable, 11 species as endangered, 11 species as critically endangered, 14 species as nearly threatened and 8 species as data deficient. Considering the seasonal variation for all selected areas simultaneously, Shannon-Weaver diversity (H) index were found ranged from 3.53 (May) to 4.37 (January) where the highest Shannon -Weaver diversity index value 4.37 were found in winter season while 3.01 in Phulkumar, 3.73 in Dudhkumar, 3.87 in Dharla, 3.67 in Tista and 3.79 in Brahmaputra were recorded separately.

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Icthyofauna of Madhumati River at Mohammadpur, Magura

Bangladesh Journal of Zoology ◽

10.3329/bjz.v49i1.53679 ◽

2021 ◽

Vol 49 (1) ◽

pp. 19-34

Author(s):

Md Anichur Rahman ◽

AHM Shafiullah Habib ◽

Shova Saha ◽

Mallika Saha

Keyword(s):

Fish Species ◽

Diversity Index ◽

Fish Fauna ◽

Fresh Water Fish ◽

Exotic Fish ◽

Water Fish ◽

Data Deficient ◽

Fish Species Composition ◽

Richness Index ◽

Near Threatened

The investigation was conducted on the present situation of fish biodiversity and abundance of fish fauna at two different points of Madhumati River at Mohammadpur upazilla under Magura district from October 2018 to September 2019. A total of 83 species of fresh water fish species were recorded belonging to 58 genera of 28 families under 11 orders. Cypriniformes was recorded as the dominant order comprising 26 species constituting 31% of the total. According to IUCN 59% of fish species were Least Concern, 12% were Vulnerable, 11% were Endangered, 9% were Near Threatened, 1% of each were Data Deficient and Critically Endangered locally, and 7% Exotic fish species were also enlisted. Annual value of Shannon diversity index (H) was 1.974 and Sipmson diversity index (λ) was 0.272 which indicate highest diversity of fish was in March. Annual Margalef’s richness index (D) was 6.654 and Pielou’s evenness index (E) was 0.447 denote highest richness was in November and evenness was in March. The river was found to have moderate type of diversity in terms fish species composition. Bangladesh J. Zool. 49(1): 19-34, 2021

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Temporal Distribution of Finfish and Shellfish in Payra River: Relationship with Climatological Changes, Ecological Pollution, and Threat Assessment

10.20944/preprints202110.0328.v1 ◽

2021 ◽

Author(s):

Md. Arifur Rahman ◽

Md. Asikur Rahaman Rahat ◽

Nitai Roy ◽

Md. Rased Khan Manon ◽

Md. Rahamat Ullah ◽

...

Keyword(s):

Fish Species ◽

Diversity Index ◽

Water Environment ◽

Winter Season ◽

Temporal Distribution ◽

Threat Assessment ◽

Fish Population ◽

Entire Study ◽

Index Value ◽

Richness Index

The Payra River is one of the large coastal rivers in Bangladesh which supports incredible fish species and has been affected by extensive human disturbance due to huge fishing pressure. The present study provides information about the temporal diversity of finfish and shellfish concerning climatological variables and ecological pollution along with threat assessment in the Payra River, Patuakhali. During the entire study, a total of 61 fish species including 56 finfish and 5 shellfish species were recorded under 22 families belonging to 11 orders. The order-wise fish species availability showed that the Perciformes (29.49%) was the dominant order based on species richness. Among them, 4 endangered, 6 vulnerable, 4 near threatened, 42 least concern, and 5 data deficient species were found. During the study period, the average Shannon-Weaver diversity index value was (3.33±0.12) indicates a good spread of fish population in the Payra river. Average Margalef richness index value was found (7.60±0.32), Pielou's evenness index (0.48±0.05), and Simpson dominance index (0.93±0.02) in Payra river. Dominance and Richness index value indicates clear water environment to slight pollution in the Payra river. Ten different kinds of fishing gears were identified under 3 major groups including 5 nets, 3 hooks and lines, and 2 traps. The phytoplanktonic genus and species revealed moderate pollution. Canonical correspondence analysis ordination plot showed that rainfall was the most influencing driving force among the meteorological parameters. The cluster analysis based on the Bray-Curtis similarity matrix showed that the winter season formed a separate cluster. In the recapitulation, the Payra River is a highly productive system that provides a favorable environment for a large variety of finfish and shellfish species assemblages. Findings of the conducted study are expected to be helpful for the respective researchers, policymakers, managers, and conservationists for the sustainable management of this water body and the interconnected surrounding neighboring countries.

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Fish Diversity and Its Threatened Status of the Dharla River in Bangladesh

Croatian Journal of Fisheries ◽

10.2478/cjf-2021-0018 ◽

2021 ◽

Vol 79 (4) ◽

pp. 163-172

Author(s):

Md. Ashraful Alam ◽

Yeasmin Ara ◽

Imran Parvez ◽

Jayanto Kumar Roy ◽

Macksood Alam Khan

Keyword(s):

Fish Species ◽

Diversity Indices ◽

Fish Diversity ◽

Indigenous Species ◽

Local Data ◽

Exotic Fish ◽

Fish Biodiversity ◽

Fishing Gears ◽

Threatened Status ◽

Destructive Fishing

Abstract Fish diversity of a riverine ecosystem became reduced due to different manmade and natural calamities. This study investigated the present fish biodiversity status of the Dharla River located (25.8103° N, 89.6487° E) in the northern part of Bangladesh from January to December 2018. In this study, the existing fish biodiversity status of the Dharla River was estimated in terms of diversity indices and threatened status (both global and local). Data was collected from the three sampling sites of the river using different fishing gears and three selected fish markets located in the Kurigram district of Bangladesh. A total of 76 fish species were identified belonging to 8 orders, 26 families and 57 genera. The Cyprinidae was the most dominant family represented by 14 species followed by the Danionidae (13 species), Bagridae (8 species) and few minor families. Apart from the indigenous species, nine exotic fish species were also recorded. The Shannon-Weaver diversity (H), Pielous evenness (e) and Margalef richness (D) indices ranged from 3.00 to 3.71, 0.62 to 0.94 and 3.94 to 7.95, respectively. Out of 76 indigenous species, 28 species (37%) were identified as threatened in Bangladesh, which included critically endangered (4), vulnerable (9) and endangered (15) species. Indiscriminate fishing through poisoning and destructive fishing gears were identified as the major threats to fish biodiversity of the Dharla River. Thus, the river serves as considerable support for threatened indigenous fishes. Therefore, necessary steps are needed to stop destructive fishing, establish permanent fish sanctuaries and proper monitoring for maintaining sustainable biodiversity in the Dharla River.

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Undergrowth phytodiversity index in exotic and indigenous tree plots in Hoteya forest range of Sakhipur upazila under Tangail forest division, Bangladesh

International Journal of Forestry, Ecology and Environment ◽

10.18801/ijfee.040121.16 ◽

2021 ◽

Vol 04 (01) ◽

pp. 141-152

Author(s):

M. M. Rahman ◽

S. A. Khan ◽

G. M. Hossain ◽

M. A. Rahim

Keyword(s):

Species Diversity ◽

Local Community ◽

Diversity Index ◽

Mangifera Indica ◽

Winter Season ◽

Diversity Indices ◽

Acacia Auriculiformis ◽

Indigenous Species ◽

Wiener Diversity Index ◽

Exotic Tree

This study was undertaken to know the species diversity of the monoculture plantations of exotic species Acacia auriculiformis and Eucalyptus camadulensis compared to indigenous species Shorea robusta and Mangifera indica. There are 12 sample plots (size 36x36 m) were selected from the study area following the purposive random sampling. A total of 720 quadrats (12 plots x 10 quadrats x 6 seasons) were placed in the sample plots to collect the undergrowth vegetation data over two years of 2010-11 following summer, monsoon and winter season. The average value of Shannon-Wiener diversity index was 2.65±0.16 and 3.28±0.13 that of Simpson’s diversity index was 0.87±0.02 and 0.93±0.01 and that of Margalef’s diversity index was 7.34±0.77 and 10.43±0.52 collectively in all exotic and indigenous plots, respectively. This scenario depicts that the extent of species diversity was higher in indigenous tree species plots than in exotic tree plots and the flora of the study area was highly diversified. The Shorea plots were richer in species diversity out of the four species categories of sampling plots. The index values of three diversity indices were significantly different for the exotic and indigenous tree plots, excluding Eucalyptus and Mangifera species plots, which mean the undergrowth species diversity of Eucalyptus and Mangifera species plots, were not significantly different. Adequate awareness building programs need to conduct among the local community and Bangladesh Forest Department to understand environmental degradation, the importance of conservation management of indigenous ‘Sal’ forest and significance of plant diversity in the village forest for future generations.

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Zooplankton Diversity Indices for the Assessment of Perennial Freshwater Body in Bishnupur, Bankura, West Bengal

Bioscience Biotechnology Research Communications ◽

10.21786/bbrc/14.4.65 ◽

2021 ◽

Vol 14 (4) ◽

pp. 1821-1824

Author(s):

Tapas Kumar Dutta

Keyword(s):

Water Body ◽

Aquatic Ecosystem ◽

Diversity Index ◽

Light Condition ◽

Diversity Indices ◽

Pollution Level ◽

Standard Procedures ◽

The Status ◽

Total Productivity ◽

Index Value

The status of health of any aquatic ecosystem is largely dependent on the diversity and density of zooplankton inhabiting the water body. Zooplankton are considered to be the most vital primary consumer in any aquatic ecosystem. At the same time, they also influence to a greater extent in determining the total productivity of an aquatic body. The present study is an attempt to estimate the diversity of zooplankton and to find out the richness, evenness, of the freshwater perennial aquatic body, Lalbundh of Bishnupur, Bankura.The study was carried out during December 2018 to November 2019. The whole period of study was divided into four major seasons viz winter (December2018 to February2018), Summer (March2019to May 2019), Monsoon (June 2019 to August 2019) and post monsoon (September 2019 to November 2019). Collection of the zooplankton samples and their quantitative analysis was done following the standard procedures. During the whole period of study 18 different species of zooplankton have been identified from the study area. Out of them 7 species belong to the Rotifera group, 6 species belong to Cladocera group, 3 species of Copepoda group and 2 species of Ostracoda group. Rotifera group comprise the dominant of all the groups constituting 39% of the total zooplankton species, followed by Cladocera (33%), Copepoda(18%) and Ostracoda (11%). The range of Shannon diversity index value of zooplankton varies from 2.76 to 2.88. The species richness value varies from 2.45 (winter) to 2.56 (monsoon). Evenness value varies from 0.95 in summer to0.98in monsoon. Zooplankton diversity indices values of Lalbundh give a clear indication of light condition of pollution level of the water body. The main reason behind the pollution of this perennial water body may be the floating dead and decomposed macrophytes in it. They should be removed as far as possible at regular intervals so that the pollution level can be reduced and the water body can be more efficiently used for pisciculture practices.

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Occurrence and diversity of microalgae in phytoplankton collected from freshwater community ponds of Hooghly District, West Bengal, India

Plant Science Today ◽

10.14719/pst.2019.6.1.426 ◽

2019 ◽

Vol 6 (1) ◽

pp. 8-16 ◽

Cited By ~ 1

Author(s):

Papiya Halder ◽

Manojit Debnath ◽

Samit Ray

Keyword(s):

Light Intensity ◽

West Bengal ◽

Diversity Index ◽

Winter Season ◽

Late Summer ◽

Diversity Indices ◽

Chemical Parameters ◽

Wiener Diversity Index ◽

Physico Chemical ◽

Multiple Variables

A study on diversity, seasonal occurrence, distribution percentage of microalgal taxa and physico-chemical parameters of five community ponds, located in Chinsurah town, Hooghly district of West Bengal, has been carried out. Correlation between occurrence of microalgal genera and some parameters of environment, physico-chemical nature of natural water bodies were explored by Canonical Correspondence Analysis (CCA). Diversity indices have been calculated using PAST software program. A total of 23 microalgal taxa belonging to four algal classes were recorded and the study indicated that the microalgal diversity vary with variation in physico-chemical parameters of water and light intensity. Out of these genera, occurrence of Chodatella sp. in late summer and Tetrallantos sp. and Synechocystis sp. in winter season were specific. In CCA, multiple variables (dissolved oxygen, water temperature, electrical conductivity, pH, light intensity and inorganic phosphorous) played a significant role in occurrence of microalgal taxa. Observation concluded that the Chlorophycean members were dominant throughout the study period and the Shannon–Wiener diversity index was highest for a site with large number of Chlorophycean member. This study will help in future to assess water quality.

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Diversity, potentiality, and conservation status of fish fauna in the upper Mahakam’s tributaries, East Kalimantan

Jurnal Iktiologi Indonesia ◽

10.32491/jii.v19i3.471 ◽

2019 ◽

Vol 19 (3) ◽

pp. 391

Author(s):

Jusmaldi Jusmaldi ◽

Nova Hariani ◽

Norbeta Doq

Keyword(s):

Fish Species ◽

Diversity Index ◽

Conservation Status ◽

Fish Fauna ◽

Iucn Red List ◽

Fish Diversity ◽

East Kalimantan ◽

Wiener Diversity Index ◽

Data Deficient ◽

Almost All

Diversity, potentiality and conservation status of fish fauna in upper Mahakam’s tributaries of east Kalimantan is unknown. The purposes of this study were to analysis species diversity, determine potentiality and conservation status of fish fauna in upper Mahakam’s tributaries, east Kalimantan. Fish sampling with purposive method was conducted in four tributaries, i.e Tepai River, Pahangai River, Danum Parai River, and Meraseh River for one month. Fishes were collected by several gears type. The results of this research showed that the total number of fish caught was 820 individuals; consist of 26 species, 7 families, and 4 orders. The Cyprinidae was the most dominant family found in all tributaries. The Shannon-Wiener diversity index in four tributaries were varied and ranging from 1.749-2.087. The highest fish diversity was recorded at Maraseh River followed by Pahangai River, Danum Parai River, and Tepai River. The low fish diversity was discovered at Tepai River may be due to differences in substrate type, water velocity, and water depth as compared to the Maraseh River, Pahangai River, Danum Parai River. The fish species similarity coefficient between four tributaries ranged from 0.606-0.842 and the highest dissimilarity was found between Tepai River and Danum Parai River. Almost all fishes categorized as edible fish for local consumption. Syncrossus hymenophysa and Gastromyzon lepidogaster have potential as ornamental fish. Regarding IUCN red list status, six fish species were grouped into least concern status, two species as data deficient, one species as near threatened, one species as endangered species and 16 other species were not on the list.

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Translocations of tropical and subtropical marine fish species into the Mediterranean. A case study based on Siganus virgatus (Teleostei: Siganidae)

Biologia ◽

10.1515/biolog-2016-0106 ◽

2016 ◽

Vol 71 (8) ◽

Cited By ~ 2

Author(s):

Harald Ahnelt

Keyword(s):

Fish Species ◽

Indigenous Species ◽

Marine Fish Species ◽

Strait Of Gibraltar ◽

Exotic Fish ◽

History Museum ◽

The Mediterranean ◽

Shipping Traffic ◽

Non Indigenous Species

AbstractAbout 160 exotic fish species are documented from the Mediterranean Sea (MED). A relatively small but rapidly increasing percentage of these non-indigenous species is represented by tropical or subtropical fishes which are naturally not distributed in a sea adjacent to the MED. The occurrence of these species is mainly ascribed to shipping traffic and aquarium trade as they are not able to actively arrive at the MED via the Suez Canal or the Strait of Gibraltar. During a survey of siganid fishes at the Natural History Museum in Vienna, a single specimen of the Barhead spinefoot,

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Demersal Fish Diversity Index in Cirebon Waters, West Java

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2021/v12i630250 ◽

2021 ◽

pp. 22-28

Author(s):

Dedi Supriadi ◽

Restu Widayaka ◽

Aman Saputra ◽

Maman Lukmanul Hakim

Keyword(s):

Fish Species ◽

Census Data ◽

Diversity Index ◽

Demersal Fish ◽

Fish Diversity ◽

Average Weight ◽

Lutjanus Campechanus ◽

Significant Difference ◽

Index Value ◽

Placement Distance

This study aims to analyze the distance between the placement of the base fish aggregating devices (FAD) from the beach, the composition of the catch, identify fish species and determine the diversity of fish caught at different distances of the base FAD in Cirebon waters. The research method was carried out descriptively by census. Data analysis method for demersal fish diversity index value (H') using Shannon-Wiener and t-test. Sampling of respondents was carried out by census as many as 20 basic FAD fishermen. The research location is in the Cangkol Tengah Fishermen Association, Cirebon City. The results of this study indicate that the number of fish species caught on FADs with a distance of <12 miles was obtained 10 species with 6,784 fish, the largest number of fish caught was snapper (Lutjanus Campechanus) as many as 2,040 fish with a percentage of 30.2% of the total number of fish. The whole fish caught, while the fish with the largest weight was snapper for distances <12 miles with an average weight of 658.92 kg or 30% of other types of fish. The number of fish species caught on FADs with a distance of >12 miles obtained 10 species with 9.217 fish, the highest number of fish caught was snapper (Lutjanus Campechanus) as many as 2,884 fish with a percentage of 27.97% of the total number of fish caught, while the fish with the greatest weight is snapper with an average weight for distances >12 miles of 988.39 kg or 30% of other types of fish. The magnitude of the demersal fish diversity index value at the base FAD placement distance <12 miles was 1.6672 and more than 12 miles was 1.8137 which means that there is no significant difference and the diversity index category is small because the value of H '≤ 2.

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Is Fundulus heteroclitus Intrusion Depleting Winter Marsh Pools of Native Fish Species?

10.20944/preprints201709.0051.v1 ◽

2017 ◽

Author(s):

Renata Gonçalves ◽

Joana Cruz ◽

Radhouan Ben-Hamadou ◽

Maria Alexandra Teodósio ◽

Ana Dulce Correia ◽

...

Keyword(s):

Salt Marsh ◽

Fish Species ◽

Native Species ◽

Fundulus Heteroclitus ◽

Habitat Degradation ◽

Abiotic Factors ◽

Winter Season ◽

Anthropogenic Pressure ◽

Indigenous Species ◽

Wide Range

This work updates the characterization of winter fish communities in salt marsh areas of Guadiana estuary (SE-Portugal) and discusses the potential risks of habitat dominance by a non-indigenous species (NIS). To this effect, six field campaigns were carried out during winter season targeting the collection of fish species. Individuals from seven different families (marine and estuarine) were collected although the community was dominated by two estuarine species – the native Pomatoschistus sp. (goby) and the NIS Fundulus heteroclitus (mummichog).  Goby controlled the majority of salt marsh habitats, except one specific, marsh pool, where extreme environmental conditions were registered, namely high temperature and salinity. Such conditions may have boosted the intrusion of mummichog in this area. This species is well adapted to a wide range of abiotic factors enabling them to colonize habitats where no predators inhabit. Impacts of mummichog intrusion in the Guadiana salt marsh area are still unpredictable since this is the first recorded in such high density. Nevertheless, in scenarios of increased anthropogenic pressure and, consequently, habitat degradation, there is a potential risk of mummichog spread to other habitats and therefore compete for space and food resources with native species.

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