scholarly journals The Diversity and Composition of Assemblages of Water Beetles (Gyrinidae, Dytiscidae, Hydrophilidae) in a Peat Bog in Belarus

Zoodiversity ◽  
2021 ◽  
Vol 55 (2) ◽  
pp. 113-120
Author(s):  
O. Shatarnova
Keyword(s):  
Species Composition ◽  
Diversity Index ◽  
Abundant Species ◽  
The Other ◽  
Peat Bog ◽  
Water Beetles ◽  
Water Beetle ◽  
Bog Lakes ◽  
Bog Water ◽  
High Diversity

The diversity and species composition of the water beetles in peat bog lakes, streams and hollows in Belarus were studied. In total, 45 species of water beetles belonging to 3 families (Gyrinidae, Dytiscidae, Hydrophilidae) were sampled by entomological net. Hydroporus tristis, Ilybius aenescens, Enochrus affinis, and E. ochropterus are the most abundant species A rather high diversity was recorded (Shannon-Wienner diversity index H′ = 2.037–2.912). Shannon-Wienner indexes indicated higher values in the lakes, whereas the lowest values in the hollows were recorded. In addition, in hollows water beetle species composition was the most different from the other peat bog water bodies.

scholarly journals Adult caddisflies (Trichoptera) attracted to artificial lights in the middle reaches of the Shinano River from 2005 to 2007

Zoosymposia ◽  
2011 ◽  
Vol 5 (1) ◽  
pp. 143-146 ◽  
Author(s):  
KIMIO HIRABAYASHI ◽  
GORO KIMURA ◽  
EISO INOUE
Keyword(s):  
Species Composition ◽  
Air Temperature ◽  
Large Scale ◽  
Abundant Species ◽  
The Other ◽  
Seasonal Abundance ◽  
Other Hand ◽  
The Mean ◽  
Summer Flood

The species composition and abundance of adult caddisflies attracted to the illuminated showcase of a vending machine set along the middle reaches of the Shinano River were investigated every Sunday night from April to November in 2005 to 2007. A total of 1,405 adult caddisflies was collected during the investigation periods. We identified a total of 13 species belonging to 11 genera of 8 families. The most abundant species was Psychomyia acutipennis (Ulmer 1908) each year. Psychomyia acutipennis adults were collected from mid-May to the beginning of October (the range of mean air temperature was 13.8 to 27.7°C), with its seasonal abundance divided into several peaks, i.e., the end of May, the beginning of June, and the end of August to the beginning of September in both 2006 and 2007. On the other hand, in 2005 when there was no large-scale summer flood and there were no marked abundance peaks. The present study suggests that the mean air temperature and summer floods impacted the seasonal abundance of P. acutipennis adults.

scholarly journals COMPARACIÓN DE LA DIVERSIDAD FAUNÍSTICA (HERPETOFAUNA) EN CACAOTALES Y RASTROJOS, SIUNA 2011

2014 ◽  
Vol 14 (1) ◽  
pp. 89-96
Author(s):  
Edwin Antonio Rodríguez Leiva ◽  
Yoicelin Nohemí Jiménez Romero ◽  
Efraín De Jesús Peralta Tercero ◽  
Oscar Montalván Castellón
Keyword(s):  
Diversity Index ◽  
The Other ◽  
Reptile Species ◽  
Faunal Diversity ◽  
Para Determinar ◽  
High Diversity

La investigación ha permitido describir la diversidad faunística (herpetofauna) en cacaotales y rastrojos, Siuna- 2011, en 15 unidades productivas, distribuidas en 5 comunidades. Se caracterizaron plantaciones de cacao y rastrojos para determinar la diversidad de herpetofauna, mediante un estudio cuantitativo-observacional-comparativo. Los resultados muestran: las tipologías de cacao multiestratos con 5 representaciones, cacao simple con 8 y cacao con musáceas 2. En rastrojos de 1 a 5 años 11 representaciones, de 6 a 10 años 1 representación y de 11 a 15 años 3. Las especies de reptiles encontradas fueron: 197 individuos agrupados en 24 especies y 10 familias y 17 géneros en todas las tipologías de cacao. En rastrojos menores a 5 años se encontraron 12 especies y 30 individuos que representan el 51.72%. En cacao y rastrojos no hay diferencias entre hábitat para las especies de herpetofauna, debido a que las parcelas muestreadas se encontraban una contiguo a la otra. El índice de diversidad dio valores de mediana diversidad (2,368 – 2,236) en ambos sitios de alta diversidad tanto en cacaotales y rastrojos superiores a 0.66 para Simpson 1-D.SummaryThe research has described the faunal diversity (herpetofauna) in cacao plantations and stubble, in the municipality of Siuna, year 2011, in 15 productive units distributed in 5 communities. Cacao and stubble plantations were characterized in order to determine the diversity of herpetofauna, through a quantitative-observational-comparative study.The results showed different typologies: multilayer cacao: 5 representations; simple cacao: 8, and cacao with musaceas: 2. Related to stubble from 1-5 years there are 11 representations; from 6 to 10 years 1 representation and 11-15 years 3 representations. The reptile species found were: 197 individuals grouped into 24 species and 10 families, as well as 17 types of cacao.In stubbles under 5 years, 12 species and 30 individuals were found representing 51.72%. In cacao and stubbles there is no difference between habitats for herpetofauna species, due to the fact that the sampled plots were contiguous one with the other. The diversity index gave median values diversity (2.368 to 2.236) in both sites of high diversity, both in the cacao and stubbles above 0.66 for 1-D Simpson.

scholarly journals The Diversity of Fish Species, Composition and Abundance from Bodna River in Kwali Area Council, Abuja.

2019 ◽  
Vol 1 ◽  
pp. 41-48
Author(s):  
B M Sani ◽  
R T Idowu ◽  
A H Banyigyi
Keyword(s):  
Species Composition ◽  
Fish Species ◽  
Diversity Index ◽  
Sustainable Use ◽  
Abundant Species ◽  
Fish Distribution ◽  
Wet Season ◽  
Fisheries Resources ◽  
Fisheries Sustainability ◽  
Fish Species Composition

The Diversity of fish species, composition and abundance from Bodna River in Kwali Area Council, Abuja was studied between May 2018 to April 2019.The aim of the study was to determine the management and sustainable use of the fisheries resources of the Area council. About 1331 fish were collected from the artisanal fishermen during the study period and morphometric indices were determined using standard methods. The fish were identified and counted. Sex ratio 1:2:1 (Males to Females) was obtained indicating a male dominated population. Length –weight measurement indicated that the fish exhibited positive allometric growth pattern. The highest percentage abundant species in the site were Oreochromis niloticus with 34.8% Clarias garienpinus with 28.0% and Pellonula leonensis with 17.6% and the least occurring species were Nannocharax shariensis with 11.0% Mormyrus valenciensis with 7.7%. The seasonal variation of fish distribution was observed to be higher in the wet season with 66.2% than the dry season. Nutrient displayed greater impact on fish abundance in the wet season. The Simpson and Shannon Weiner’s diversity index values were (0.976) and (-1.456) in both richness and evenness respectively. The findings of the study could be helpful to the artisanal fishermen and the community for fisheries sustainability.

scholarly journals Water Beetles: Species Diversity and Response to Physico-Chemical Parameters in Different Freshwater Habitats in Samtse, Bhutan

2021 ◽  
Vol 10 (1) ◽  
pp. 64-82
Author(s):  
Tez Bdr Ghalley ◽  
Ugyen Dorji ◽  
Cheten Dorji ◽  
Arjun Nepal ◽  
Namgay Shacha
Keyword(s):  
Diversity Index ◽  
Similarity Index ◽  
Abundant Species ◽  
Shannon Diversity Index ◽  
Chemical Parameters ◽  
Water Beetles ◽  
Shannon Diversity ◽  
Physico Chemical ◽  
Significant Difference ◽  
Freshwater Habitats

Bhutan is located between the two zoogeographic regions which are assumed to be rich in diversity of water beetles. The study aimed to determine the diversity and distribution pattern of water beetles in different freshwater habitats in Namgaychholing under Samtse district, Bhutan. The study also analysed the association of water beetles with the physico-chemical parameters. The data were collected from four different habitats with sample plot of 3 m × 1 m for a standard time of 1 hour in every plot. A total of 30 species belonging to 7 families were recorded of which Dytiscidae (n=626, RA=51) was the most abundant family and Lacconectus basalis (n=416, RA=34.13) was the most abundant species. The overall Shannon diversity index of the study area was H ′=2.48. Amongst the different habitats, marshy area had the highest Shannon diversity index (H ′=2.45) and stream had the lowest (H ′=1.82). A Kruskal Wallis test on diversity among different habitats showed no significant difference (p<.05). Through a cluster analysis, the species composition between the river and waterlogged showed 100% similarity index. Canonical correspondence analysis showed temperature as a main determining factor affecting the distribution of water beetles. With broad families encompassing the water beetles, similar study on water beetles in different regions of the country is recommended with particular emphasis on different families. Moreover, Bhutan falls in junction of Palearctic and Oriental Zoogeographic regions, which are known to be rich in diversity of water beetles. Hence, study in high-altitude lakes, which are assumed to be rich in diversity of water beetles are recommended despite social beliefs to keep lakes isolated and undisturbed.

scholarly journals The comparison of zooplankton communites inside and outside of Dong Thanh landfills, Ho Chi Minh City

2016 ◽  
Vol 19 (4) ◽  
pp. 35-44
Author(s):  
Phuc Dinh Nguyen ◽  
My Ngoc Diem Tran
Keyword(s):  
Cluster Analysis ◽  
Species Composition ◽  
Diversity Index ◽  
Zooplankton Community ◽  
The Other ◽  
Ho Chi Minh City ◽  
Dominance Index ◽  
Microbiological Pollution ◽  
The Difference ◽  
Zooplankton Communities

Species composition and characteristic of zooplankton communities in treated leachate of Dong Thanh landfills and in Rach Tra river (receiving the wastewater of Dong Thanh landfills) were surveyed monthly from 11/2012 to 04/2013. The results from those two areas were compared to find out the difference of the zooplankton communities. 122 species of 36 genus, 10 classes, 3 phylums and 6 types of larva were identified, of which Rotatoria acounted for 52 %. The result of Cluster analysis showed that there was a distinct difference between the zooplankton community intreated inside the landfills and Rach Tra river. The zooplankton community inside the landfills characterized by low quantity of species but high individual density. The main species composition was Rotatoria and Protozoa with good adaptation of organic and microbiological pollution of water. On the other hand, the zooplankton community in Rach Tra river characterized by communities in natural aquatic habitat with the relative balance of zooplankton groups, diversity index and dominance index were average levels.

scholarly journals Über Arthropodenabwehrstoffe, LXV. Die Chemische Ökologie des Grundschwimmers Laccophilus minutus / On Arthropode Defensive Compounds, LXV. The Chemical Ecology of the Water Beetle Laccophilus minutus

1983 ◽  
Vol 38 (12) ◽  
pp. 1678-1685 ◽  
Author(s):  
H. Schildknecht ◽  
B. Weber ◽  
K. Dettner
Keyword(s):  
Mass Spectrum ◽  
Chemical Ecology ◽  
The Other ◽  
Monophyletic Group ◽  
Pygidial Gland ◽  
Water Beetles ◽  
Water Beetle ◽  
Pygidial Gland Secretion ◽  
Defensive Glands ◽  
Main Component

According to a GC-MS analysis of methylated extracts the abdominal tips of the water beetle Laccophilus minutus (Dytiscidae) contain four β-hydroxyalkanoic acids. On the basis of MS and GC data another compound was assigned the structure of 6-octenoic acid.The same β-hydroxyalkanoic acids, and in addition, traces of β-hydroxyheptanoic acids were identified in dissected pygidial defensive glands after trimethylsilylation. Methyl 3,4-dihydroxyphenylacetate was recognized as a further main component in the pygidial gland secretion from the mass spectrum of its TMSi ether.The Laccophilinae occupy unique position among all the dytiscide subfamilies because they are the only water beetles which store β-hydroxyalkanoic acids in their pygidial glands. On the other hand the dytiscides appear to form a monophyletic group which is supported by the occurrence of methyl 3,4-dihydroxyphenylacetate. This class of compound is also commonly encountered in the other dytiscide subfamilies

AQUATIC COLEOPTERA OF PEATLANDS AND MARSHES IN CANADA

1987 ◽  
Vol 119 (S140) ◽  
pp. 99-132 ◽  
Author(s):  
David J. Larson
Keyword(s):  
Life History ◽  
Species Composition ◽  
Feeding Habits ◽  
Water Beetles ◽  
Future Needs ◽  
Water Beetle ◽  
Wetland Water ◽  
Life History Patterns ◽  
Common Future ◽  
Rich Fauna

AbstractA rich fauna of water beetles, comprising 11 families and 485 species, occurs in Canadian peatlands and marshes. These beetles are diverse with respect to morphology, feeding habits, life-history patterns, and even in the degree to which they occur in water. Major adaptations to peatland and marsh habitats are described. Based on species composition, the following regional communities of marsh-inhabiting beetles are recognized: arctic, boreal, Cordilleran, grasslands, and eastern temperate. Peatlands possess a community of beetles similar to that of boreal marshes but contain enough unique elements to warrant separate recognition. However, based on water beetle distribution, it is not possible to subdivide peatlands into bog and fen communities because these habitats have many species in common. Future needs for research on wetland water beetles are identified.

scholarly journals Seasonal Changes of Fish Assemblages in a Subtropical Lagoon in the SE Gulf of California

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
F. Amezcua ◽  
F. Amezcua-Linares
Keyword(s):  
Species Composition ◽  
Coastal Lagoon ◽  
Seasonal Variations ◽  
Fish Assemblage ◽  
Seasonal Changes ◽  
Gulf Of California ◽  
Fish Assemblages ◽  
Diversity Index ◽  
Abundant Species ◽  
Almost All

The composition and seasonal changes of the fish assemblage in a coastal lagoon system in southeastern Gulf of California were assessed from December 2001 to July 2005. A total of 20,877 organisms belonging to 191 species and 47 families were analyzed. We determined that almost all the species inhabiting the system were found; however some rare species were not captured in our study. The majority of the species found were demersal but in every season at least one pelagic or benthopelagic species showed high abundances. The moonfish,Selene peruviana, was the most abundant species, whilst the puffer,Sphoeroides annulatus, was the main species in terms of biomass. The species composition changed seasonally; results from the Simpson diversity index and the cumulative species curve show that seasonally almost all the species in the system for a given season were found. These changes were also reflected in the multivariate results. The seasonal variations could be attributed to the migration of species out of the system as they grow and the arrival of new ones, which could also be related to temperature patterns since this environmental factor changes considerably through the year.

scholarly journals Rove beetles (Coleoptera: Staphylinidae) of a large pristine peat bog in Belarus Lake District

2018 ◽  
Vol 61 (2) ◽  
pp. 99-104
Author(s):  
Gennadi G. SUSHKO ◽  
Keyword(s):  
Species Richness ◽  
Abundant Species ◽  
The Other ◽  
Peat Bog ◽  
Lake District ◽  
Open Spaces ◽  
Rove Beetles ◽  
Moss Layer ◽  
High Species Richness ◽  
North Western

Species composition and diversity of the rove beetles were studied in main habitats of a large pristine peat bog in Belarus Lake District (North-Western Belarus). Very specific staphylinid assemblages were found. They were characterized by not high species richness and diversity. In these uneven assemblages, a very small number of species: Drusilla canaliculata (Fabricius, 1787), Philonthus cognatus Stephens, 1832, Staphylinus erythropterus Linnaeus, 1758, Ischnosoma splendidus (Gravenhorst, 1806) dominated, while the majority of recorded species were rare. Unlike other inhabitants of the moss layer among the highly abundant species of rove beetles, peat bog specialists were not found. The highest diversity and evenness had the rove beetles assemblages in open spaces. On the other hand, the differences in these assemblages were not high.

Trichoptera of a Victorian forest stream: Species composition and life histories

1987 ◽  
Vol 38 (6) ◽  
pp. 845 ◽  
Author(s):  
JC Dean ◽  
DI Cartwright
Keyword(s):  
Life History ◽  
Species Richness ◽  
Life Cycle ◽  
Species Composition ◽  
Life Histories ◽  
Abundant Species ◽  
Early Summer ◽  
The Other ◽  
Leaf Pack ◽  
Forest Stream

The species composition and life histories of the Trichoptera of a Victorian forest stream were investigated for 21 months. Monthly samples were collected from zones of fast current in midstream over the whole study period, and also from side riffles and leaf-pack accumulations for periods of 7 and 8 months, respectively. In all, 40 species were recorded as larvae, and it is suggested that species richness is similar to comparable streams in the Northern Hemisphere. The communities of all three biotopes were dominated by Tamasia acuta (Calocidae). Information is presented on life histories of the nine most abundant species. Ethochorema turbidum (Hydrobiosidae) exhibited a non-seasonal life history, while the remaining eight species were seasonal and displayed varying degrees of synchrony. Tamasia acuta required 2-3 years to complete the life cycle, Alloerella grisea (Helicophidae) required 1-2 years, and the other six species were univoltine. Agapetus monticolus and A. kimminsi (Glossosomatidae) were temporally segregated, with the former emerging in spring and early summer and the latter in summer and autumn.

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