scholarly journals Ichthyofaunal composition and diversity of Stubbs Creek, Ibeno, in Akwa Ibom State, Nigeria

2020 ◽  
Vol 7 (17) ◽  
pp. 297-303
Author(s):  
Henry Robert Anwan ◽  
Martins Agenuma Anetekhai
Keyword(s):  
Species Richness ◽  
Fish Species ◽  
Diversity Index ◽  
Landing Site ◽  
Descriptive Statistics ◽  
Identification Guide ◽  
Fish Samples ◽  
Landing Sites ◽  
Ecosystem Diversity ◽  
Abundance And Distribution

The fish abundance and distribution of Stubbs Creek were examined in order to provide information for the management and sustainable exploitation of the ecosystem services. Fish samples obtained from the fishermen landing sites were identified using FAO species identification guide. Data were analyzed using descriptive statistics. Species diversity and community abundance were determined using Shannon-Weiver diversity index (H) and Margalef's species richness (d). Twenty nine fish species, twenty two genera in nineteen families and eight orders were identified from the three landing stations during the study. Station 1 (Iwokpom) recorded the highest taxa (24) consisting of 993 fishes (43.14%) of the total catch. Landing site 2 (Iwuchang) and 3 (Ubenekang) both recorded 22 taxa each comprising 556 (24.15%) and 753 (32.71%) fishes, respectively. Iwokpom recorded the highest diversity in fish species d = 3.333, but the lowest general ecosystem diversity (H = 2.781). Ubenekang (Station 3) had the lowest species richness d = 3.17, but recorded the highest biodiversity (H = 2.839) in the study. Evenness was generally high among the stations but Iwopom recorded the lowest value of e = 0.6722 and Ubenekang had the highest, e = 0.7769. Iwuchang (Station 2) came next to Iwopon in species richness d = 3.322, but was next to Ubenekang in general diversity (H = 2.833) and evenness e = 0.7725, respectively. The present study indicated that stub creek is rich in fish biodiversity. Therefore users of this water body should maintain responsible fishing activities in order to conserve this biodiversity.

Linking fish and crustacean taxonomic composition with seasonal contrasts in the soft-bottom intertidal zone

2020 ◽  
Author(s):  
M. A. Gondal ◽  
S. Iqbal ◽  
U. Atique ◽  
N. U. Saher ◽  
N. A. Qureshi ◽  
...  
Keyword(s):  
Species Richness ◽  
Water Temperature ◽  
Fish Species ◽  
Diversity Index ◽  
Taxonomic Composition ◽  
Primary Objective ◽  
Negative Effect ◽  
Fish Species Composition ◽  
One Year ◽  
Sw Monsoon

Abstract The primary objective of this study was to investigate the seasonal fish and crustacean variations concerning taxonomic composition, species richness, and diversity in sandy beach habitat. For this purpose, we investigated the Sonmiani Hor lagoon area during four distinct seasons, i.e., northeast (NE) monsoon, pre-monsoon, south-west (SW) monsoon, and post-monsoon for one year. During each haul, the net was pulled about 100m along the beach in 0.5m depth. The results showed a strong linear correlation between the diversity index and equitability in fishes (r = 0.978). The diversity index was strong negatively correlated with the abundance and biomass (r = -0.978, -0.972, respectively). The physical attributes like sea surface water temperature and salinity showed a strong negative effect on species assemblages (r = -0.981 and -0.943, respectively). The mean air and water temperature illustrated approximately 3°C difference during NE and pre-monsoon seasons. However, salinity, pH, and electrical conductivity did not show any significant seasonal variabilities. Under the ecological indices, the fish species displayed higher diversity (H’ = 3.19) during SW monsoon, whereas the lowest diversity was observed during pre-monsoon (H’ = 1.58). The equitability and species richness, however, remained more noticeable during SW monsoon (J’ = 0.81). The total number of individuals of fish and crustaceans reached 4799 with 3813 fish individuals and 986 individuals of crustaceans. A total of 27 families of fish while five crustacean families comprising of 30 genera and 38 fish species while ten genera and 17 species of crustaceans were recorded. Liza subviridis displayed the highest abundance among the sampled fish species. In conclusion, fish species constituted a significant part of the coastal fauna in the study area. The seasonal variations displayed distinct variations in fish species composition and diversity.

scholarly journals Proximate composition of commercially important fish species in southern Gulf of Lake Tana, Ethiopia

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Hirut Geremew ◽  
Melesse Abdisa ◽  
Goraw Goshu
Keyword(s):  
Fish Species ◽  
Proximate Composition ◽  
Energy Content ◽  
Addis Ababa ◽  
Clarias Gariepinus ◽  
Genital Papilla ◽  
Lake Tana ◽  
Fish Samples ◽  
Landing Sites ◽  
Gross Energy

The aim of the study was to determine the proximate composition of each sex of Oreochromis niloticus, Clarias gariepinus and Labeobarbus intermedius fish species from the southern Gulf of Lake Tana, Ethiopia. The fish samples were collected during the dry season of 2014 from the three fish landing sites, i.e., Bata, Micheal and Giorgis, where local fishermen sell their catches. Species were identified via morphological examination and color. Sexes were identified by observing genital papilla and gonads after dissection. After measuring weight and length of young fish species, fish weighing 201-310 g were selected for the study. A total of 72 fish, eight and four fish per species and sexes were selected, respectively, for each site. The sample size was determined using “resource equation" method. Only edible fillet was labeled and transferred to plastic bags according to species and sex. Then the sample was transported for proximate analysis to Addis Ababa Food Science and Nutrition laboratory using icebox at about 4 °C. Fish sample composites were prepared by taking the fish samples from the three fish landing sites for each sex and species. Samples were thawed at room temperature and oven-dried at 60 °C for 72 h, then ground into a fine powder. Proximate composition was determined following the procedure of Association of Official Analytical Chemists (AOAC). Data analysis was conducted using analysis of variance (ANOVA). Nutrient content significantly varied among fish species; more protein was recorded from O. niloticus and fat from L. intermedius. Also, fat, ash and gross energy content were different between sexes; female fish contained significantly more fat and gross energy than males. In conclusion, consumers are advised to consume these species to obtain required nutrients.

scholarly journals Impact of the Low Head Dam/Barrage on Fisheries – A Case Study of Giri River of Yamuna Basin (India)

2015 ◽  
Vol 17 (2) ◽  
pp. 119-138
Author(s):  
Harcharan Singh Rumana ◽  
Veliachamy Jeeva ◽  
Sudhir Kumar
Keyword(s):  
Species Richness ◽  
Relative Abundance ◽  
Fish Species ◽  
Habitat Heterogeneity ◽  
Diversity Index ◽  
River System ◽  
Western Himalayas ◽  
Diversity Pattern ◽  
Low Head ◽  
Longitudinal Stretch

Abstract Shannon’s diversity index H’ = pi log2 pi was calculated for 16 fish species. The index was resolved into its components, species richness and relative abundance, to determine which components played a larger role in the determination of diversity pattern. Changes in diversity were correlated with species richness (r), habitat heterogeneity, and hydrological regimes in a longitudinal stretch of 35 km along the river Giri, a major tributary of the Yamuna River system, in Western Himalayas. Abundance differs with change in habitat structures, habitat preference of fish species and water regimes. The decrease in diversity in the lower stretch of about 3-4 km upstream of the barrage was found to be associated with habitat fragmentation and as well as d/s with loss of biotic integrity of aquatic ecosystem due to water scarcity. Species richness was found to be maximum at upper and middle reaches (elevation 650-800 m, msl) of the river, whereas it was low in lower reaches. Change in water chemistry was also noticed at Jatan barrage-low head dam due to impoundment of river water. It is inferred that the regulation of water has an impact on species richness and relative abundance, and on habitat heterogeneity which has decreased due to the change in environmental condition.

scholarly journals FISH DIVERSITY OF GHODAGHODI LAKE IN KAILALI, FAR-WEST NEPAL

2017 ◽  
Vol 22 (1) ◽  
pp. 120-126
Author(s):  
Dipendra Joshi ◽  
Bijaya K. C.
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Fish Species ◽  
Diversity Index ◽  
Fish Diversity ◽  
Channa Striatus ◽  
Illegal Fishing ◽  
Dominant Fish ◽  
Fish Catch ◽  
Excessive Proliferation

Ghodaghodi Lake is an ox-bow perennial lake of Ghodaghodi Lake Complex, situated in Kailali district. The present study was conducted to understand the fish diversity, community structure and distribution pattern in Ghodaghodi Lake. A total of 13 fish species were recorded from the different section of Ghodaghodi Lake, belonging to five order, eight family and eleven genera. According to fish catch the dominant order and family of Ghodaghodi Lake were found to be Cypriniformes (40%) and Cyprinidae (40%) respectively. The dominant fish species of Ghodaghodi Lake was Labeo gonius followed by Mystus tengara, Nandus nandus and Channa striatus. The highest diversity index (2.46), species richness (6.14) and evenness (0.96) of fish were recorded from station III during the month of January. Lowest diversity index (1.75) and evenness (0.90) was found in station II and during the month of October (2.25 and 0.88). Similarly, lowest species richness was found in station I (3.91) and during the month of July (5.82). Fish diversity and number in Ghodaghodi Lake were found to have decreased. This could be due to pollution, illegal fishing and excessive proliferation of aquatic weeds.Journal of Institute of Science and TechnologyVolume 22, Issue 1, July 2017, page: 120-126

scholarly journals Ichthyofauna of Endemic Fish in Towuti Lake, Luwu Timur Regency, South Sulawesi, Indonesia

2021 ◽  
pp. 20-30
Author(s):  
. Jayadi ◽  
Muhammad Natsir Nessa ◽  
Andi Tamsil ◽  
. Harlina ◽  
. Ernaningsih ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Quality Parameters ◽  
Descriptive Statistics ◽  
Water Quality Parameters ◽  
South Sulawesi ◽  
Fish Samples ◽  
Survival And Growth ◽  
Endemic Fish ◽  
Lake Towuti

Aims: The aims of this study to determine the biodiversity of endemic fish in Lake Towuti, Luwu Timur Regency South Sulawesi, Indonesia. Study Design: The research was conducted by survey Place and Duration of Study: The research was carried out in February until March 2021 in Tanjung Timbala; Tanjung Lengkobutanga; Tanjung Bakara; Tanjung Saone and. Tanjung Tominanga at Lake Towuti, Luwu Timur Regency South Sulawesi, Indonesia. Methodology: Fish samples were carried out every week using a trap net for 8 weeks. Fish samples obtained from each station were separated according to species. Fish samples were preserved with 4% formalin and then immersed in 70% alcohol before species identification was conducted. Data analysis in this research used descriptive statistics. Results: The endemic fish species was found is telamtherina bonti Telmatherina bonti, Telmatherina celebensis, Paratherina striata, Tominanga sanguicauda, Tominanga aurea Oryzias profundicola, Oryzias matanensis, Oryzias marmoratus, Mugilogobius hitam, Glossogobius flavipinnis, Glossogobius matanensis and Dermogenys megarhamphus. The percentage of endemic fish caught at each station on Lake Towuti was different. The water quality parameters obtained are as follows Temperature: 26.40⁰C-30.30⁰C, pH: 6.35-9.03, dissolved oxygen (DO):6.25-8.95 mg/L and NO3-N: 0.023-0.066 mg/L.This water quality were suitable for the survival and growth of endemic fish. Conclusion: Endemic fish families were obtained such as Telmatheridae, Adrianichthyidae, Gobiidae and Hemiramphidae and a total of twelve endemic fish species were found in this study. The number of endemic fish was found to be different at the station. Water quality parameters play an important role in the distribution and existence of endemic fish in Lake Towuti.

scholarly journals Bacteriological profile of selected fish species and water sample from Otuocha River Anambra State

2020 ◽  
Vol 18 (1) ◽  
pp. 11-26
Author(s):  
K.E. Amuneke ◽  
G.C. Igbodiegwu ◽  
P.A. Okeke ◽  
A.C. Adibe
Keyword(s):  
Water Sample ◽  
Fish Species ◽  
Continuous Process ◽  
Landing Site ◽  
Microbial Load ◽  
Anthropogenic Sources ◽  
Microbial Quality ◽  
Fish Food ◽  
Fish Samples

Attempt to ensure fish food security is a continuous process and food safety is a global concern for consumers and food industry. Fish is an  important source of healthy and cheap source of animal protein that among its numerous benefit fish is widely acceptable, across socio-economic, age and religious barrier. However, supply of contaminated free fish is desirable to ensure safe consumption and a healthy consumer public`. The  objective of the study is to provide baseline information on the microbial quality of Otuocha river, hence establish the microbial quality of fish caught in Otuocha river. Five fish species (Aruis gigas, Bagrus bayad, Schilbe mystus, Chrysichthys nigroditatus and Protopterus annectens) and water sample were taken from Otuocha fish landing site and river respectively and transported to laboratory. The fish samples were cleaned with sterile distilled water and 1 g of skin, gills, intestine cut aseptically and labelled along with water sample before microbial analysis following standard method. The result obtained in water and fish samples showed high microbial load in Otuocha river and was attributed to anthropogenic sources. Nine different bacteria were isolated in fish samples while seven were isolated in water sample. The study concluded that Otuocha river has high microbial load, hence recommend that fish from Otuocha river should be properly cooked/smoked before consumption and sanitary standard of Otuocha river and its environs be improved while public enlightenment on waste disposal be undertaken. Key words: Microbial load, fish, water, Otuocha River

scholarly journals Environmental Variables and Fisheries Diversity of the Nuwa River, Panchthar, Nepal

2020 ◽  
Vol 13 (13) ◽  
pp. 69-74
Author(s):  
Jash Hang Limbu ◽  
Archana Prasad
Keyword(s):  
Dissolved Oxygen ◽  
Fish Species ◽  
Environmental Variables ◽  
Diversity Index ◽  
Environmental Parameters ◽  
Influential Factors ◽  
Water Volume ◽  
Fish Diversity ◽  
Fish Assemblage Structure ◽  
Fish Samples

The fish samples were collected from October 2017 to June 2018 in Nuwa River from four sampling stations by using cast net, bamboo fish trap and mosquito nets. Environmental parameters: water temperature, dissolved Oxygen (DO), CO2, pH, hardness and water velocity were analyzed during each field visit. Eight fish species were collected in present study. The most copious species were Schizothorax plagiostomus, and Schistura multifaciatus. Shannon-Weiner fish diversity index and species richness recorded were highest at station I and lowest at station III, similarly, evenness index was highest at station I and lowest at station III. The water volume, water depth, and the availability of substrates were found to be major influential factors for the weight and length of the fishes. The redundancy analysis (RDA) portrayed that environmental variables like dissolved oxygen, free- carbon dioxide, and pH were found to be pivotal variables to shape the fish assemblage structure of Nuwa River. The cluster analysis delineated that similarity between fish species subsided as the distance of sites turgid.

scholarly journals Population Aspects of Fishes in Geba and Sor Rivers, White Nile System in Ethiopia, East Africa

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Simagegnew Melaku ◽  
Abebe Getahun ◽  
Mulugeta Wakjira
Keyword(s):  
Sex Ratio ◽  
Fish Species ◽  
Condition Factor ◽  
Diversity Index ◽  
Abundant Species ◽  
Fish Diversity ◽  
Reproductive Behaviors ◽  
Fish Samples ◽  
The Mean ◽  
White Nile

This study was carried out to assess the diversity, condition factor, length-weight relationship, and sex ratio of fishes in Geba and Sor Rivers located in Baro-Akobo Basin, White Nile system within Ethiopia. Fish samples were collected in one wet and one dry season. The length-weight relationships were fitted using power equation for the most abundant species. A total of 348 fish specimens were collected using gillnets and hooks. These were identified into eight species and one Garra sp. representing seven genera and four families. Family Cyprinidae was the most dominant with six species (66.7%). Labeobarbus intermedius, Labeobarbus nedgia, and Labeo cylindricus were the most abundant fish species, respectively, with 60.72%, 16.83%, and 14.66% index of relative importance (IRI). The diversity index was higher for Geba River (H′ = 1.50) than for Sor River (H′ = 1.10). All the three most abundant species had negative allometric growth. Seasonal variations in the mean Fulton condition factor (FCF) were statistically significant for L. cylindricus (p<0.05). There was variation in the sex ratio with the females dominating in all the three most abundant species. Further investigation into the fish diversity, food, feeding, and reproductive behaviors of fish species especially in the tributaries of these rivers and their socioeconomic aspects is recommended.

scholarly journals Changes in a Fish Community in a Small River Related to the Appearance of the Invasive Topmouth Gudgeon Pseudorasbora parva (Temminck & Schlegel, 1846)

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1857
Author(s):  
Jacek Rechulicz
Keyword(s):  
Species Richness ◽  
Fish Species ◽  
Native Species ◽  
Salmo Trutta ◽  
Diversity Index ◽  
Predatory Fish ◽  
Total Density ◽  
Pseudorasbora Parva ◽  
Topmouth Gudgeon ◽  
Invasive Fishes

In recent years, the topmouth gudgeon (Pseudorasbora parva) has been one of the most invasive fishes in Europe. Pseudorasbora parva can potentially affect ecosystems, fish communities, and particular fish species. Electrofishing was carried out over a five-year period at three study sites in the Ciemięga River (eastern Poland) before and after P. parva had been found in the river. Changes in the occurrence, abundance, and density of native fish species after the appearance of the invader were determined. Changes in the species’ richness were calculated, and correlations were estimated between the occurrence and density of P. parva and particular fish species and richness indices. The presence of P. parva has not affected the density of native species but coincides with a significant increase in estimated species richness and the total density of fish. There was a significant relationship between the presence of this invasive species and the fish community’s composition, though the PERMANOVA result was unclear with regards to site-specific effects. Moreover, tench and bleak were associated positively, whereas Eurasian perch and sunbleak were associated negatively with the occurrence of P. parva. Pseudorasbora parva density was highly correlated with Cyprinidae density (excluding P. parva), species richness, and the Margalef diversity index. Thise study has shown that the presence of predatory fish in the river (Salmo trutta L.) may reduce the numbers of invasive P. parva.

scholarly journals KEANEKARAGAMAN JENIS KELELAWAR (Chiroptera) DI HUTAN KOTA TELUK AKAR BERGANTUNG KABUPATEN KETAPANG

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Lana Trecyana ◽  
Iswan Dewantara ◽  
. Erianto
Keyword(s):  
Species Richness ◽  
Urban Forest ◽  
Diversity Index ◽  
West Kalimantan ◽  
Catch And Release ◽  
Brunei Darussalam ◽  
Hollow Trees ◽  
Identification Guide ◽  
Large Trees ◽  
Release Method

Bats (Chiroptera) are the only mammals that can fly. Bat habitats are in caves, large trees in the forest, hollow trees, coconut trees, banana trees and roofs of buildings. Bats are nocturnal, they forage at night and sleep during the day by hanging upside down. Teluk Akar Bergantung has a generally flat and swampy topography, with a small portion submerged in water. Various types of trees have grown, one of them is Beringin/Kayu Are, which is where bats live. Bats play a role in the balance of ecosystems as seed dispersers, flower pollinators, insect controllers and guano producers. Based on the potential in this area, the research aims to collect data on various types of bats in Teluk Akar Bergantung, Ketapang regency, West Kalimantan. The method used is catch and release method using mist nest. Data analysis of the research used bats identification guide written by Suyanto (2001) entitled “Kelelawar di Indonesia” and “Panduan Lapangan Mamalia di Kalimantan, Sabah, Sarawak dan Brunei Darussalam” by Payne et. al (2000), diversity index (H’), equitability index (e), dominance index and species richness (d). The result of research obtained 14 individuals consist of 6 species (Vampir palsu (Megaderma spasma), Codot mini (Cynopterus minutus), Codot krawar (Cynopterus bracyothis), Codot horsfield (Cynopterus horsfieldii), Codot kecil kelabu (Pentethor lucasii) and Codot pisang-coklat (Macroglossus minimus), belonging to 2 families (Pteropodidae and Megadermatidae). Diversity index is in the medium category (1,47), the equitability index is in the high category (0,82), no type of bats that dominates (0,31) and the species richness is in medium category (2,79).                                                   Keywords: bats, diversity, Teluk Akar Bergantung, urban forest

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