Nematode communities

The study found that nematode composition differed significantly between the upper and deeper layers of sediment but not among the deeper layers. Nematode density showed spatial variability across layers, with higher values in the upper layer. Nematode diversity decreased with increasing depth. Non–selective deposit feeders (1B) were dominated in the surface layers, while the predator–omnivores feeders (2B) was numerous in the deeper layers

18p dianmotminh02 03-05-2024 3 2   Download

This study aims to investigate how nematodes’ communities variables such as diversity, sex and feeding structure alter in different 5 layers of sediment deep profile of the river bed. Our studies found for the first time that nematodes’ communities not only stay on 10 cm first layers but they can contribute until 50 cm deep in the sediment profile of the river bed.

9p vimalfoy 08-02-2023 5 1   Download

Southern root-knot nematode Meloidogyne incognita (Kofoid and White, 1919), Chitwood, 1949 is a key pest of agricultural crops. Pasteuria penetrans is a hyperparasitic bacterium capable of suppressing the nematode reproduction, and represents a typical coevolved pathogen-hyperparasite system. Attachment of Pasteuria endospores to the cuticle of second-stage nematode juveniles is the first and pivotal step in the bacterial infection. RNA-Seq was used to understand the early transcriptional response of the root-knot nematode at 8 h post Pasteuria endospore attachment.

15p vitzuyu2711 29-09-2021 16 1   Download

Monochamus alternatus Hope is one of the insect vectors of pinewood nematode (Bursaphelenchus xylophilus), which causes the destructive pine wilt disease. The microorganisms within the ecosystem, comprising plants, their environment, and insect vectors, form complex networks.

13p vijeeni2711 24-07-2021 4 0   Download

Nematode model organisms such as Caenorhabditis elegans and Pristionchus pacificus are powerful systems for studying the evolution of gene function at a mechanistic level. However, the identification of P. pacificus orthologs of candidate genes known from C. elegans is complicated by the discrepancy in the quality of gene annotations, a common problem in nematode and invertebrate genomics.

9p vijeeni2711 30-06-2021 14 1   Download

The nematode Pristionchus pacificus is an established model organism for comparative studies with Caenorhabditis elegans. Over the past years, it developed into an independent animal model organism for elucidating the genetic basis of phenotypic plasticity.

12p vilichoo2711 23-06-2021 8 1   Download

This research aims to explain the differences between single- and multi-correlation for evaluation of the effects of environmental factors on nematodes as well as aquatic organisms.

15p angicungduoc7 09-09-2020 30 2   Download

A survey was carried out to study the distribution of plant parasitic nematodes associated with fruit crops of Bhubaneswar- The capital of state Odisha, India. Around 240 soil samples were collected from the rhizosphere of fruit crops; cashew nut, guava, papaya and lime across the different places of Bhubaneswar. Nematodes were isolated by Cobb’s sieving and decanting method followed by modified Baermann’s funnel technique. Communities of plant parasitic nematodes were analysed.

6p caygaocaolon6 30-07-2020 10 2   Download

The genus Parkellus with a redescription of Parkellus menzeli male is recorded and illustrated for the first time from Vietnam. One male of Parkellus menzeli was collected from Y Ty Commune, Bat Xat natural conservation area, Lao Cai Province, northwest Vietnam; its measurements and features corresponded well with the type population from Crasta im Textal, Switzerland and other populations from Poland.

5p xilank_of 22-07-2020 17 2   Download

Several genera dominated in Tri An Reservoir such as Daptonema, Rhabdolaimus, Udonchus, and Neotobrilus indicated for organic enrichment conditions. The percentage of cp3&4 and MI (Maturity Index) value in the dry season was higher than that in the pre-rainy season expressed the ecological quality status of sediment in the dry season were better than those in the pre-rainy season.

12p viino2711 08-05-2020 9 1   Download

A survey was conducted to explore the existence of plant parasitic nematodes associated with millet crops in Tiruvannamalai District. In this study, nine genera of plant-parasitic nematodes were recognized. The analysis of nematode communities revealed that the Tylenchorynchus sp. was the most frequently occurring nematode having an absolute frequency of 46.6% followed by Helicotylenchus sp. (38.8%) and Meloidogyne sp. (25.9%).

5p caygaocaolon2 11-03-2020 9 1   Download

The purposes of this work are to (i) identify free-living nematode communities and the environmental variables in an organic shrimp farms ponds, (ii) determine the correlation between dominant nematode genera with main environmental variables and (iii) detect the EcoQ in Tam Giang’s organic shrimp farms ponds (TGOSFP) through dominant nematode genera and MI value.

13p abcxyz123_02 03-03-2020 14 0   Download

As mentioned above, the purpose of this research was to: (i) to survey of nematode assemblages in the Ba Lai river (from estuary to upstream) by assessing their composition, density and diversity and also (ii) determine effects of Ba Lai dam on the distribution of nematode communities.

12p abcxyz123_02 03-03-2020 12 1   Download

Ascaris lumbricoides infections are one of the commonnest intestinal nematode infections in the world, with a profound negative effect on nutritional status among underprivileged populations. In Sri Lanka, Ascaris infections and low nutritional status still persist in the plantation sector.

9p videshiki2711 21-02-2020 14 1   Download

The following results were also recorded that abundance/biomass comparison (ABC) method has been used successfully for detecting the ecological quality status of sediment (EcoQ) in Tam Giang’s organic shrimp farming ponds. The results indicated that unfavourable deflections (stress) in EcoQ of Tam Giang’s organic shrimp farming ponds throughout the dry - transfer - rainy season. More specificall.

9p gildur 30-11-2019 13 0   Download

Sub-tidal free-living nematodes in 12 stations along the Saigon River were investigated in both dry and rainy seasons during 2014 and 2015. In total, 157 nematode genera were found to belong to 59 families, and 11 orders of two classes of Enoplea and Chromadorea were identified. The trophic structure of free-living nematode communities was analysed spanning the overall seasons to see that deposit-feeders developed dominantly in the Saigon River indicating their association with food types including particles, bacteria, diatom, etc..

6p caygaocaolon1 13-11-2019 10 1   Download

The highest numbers of nematodes with a percentage ranging from 76.4% in Cung Hau to 77% in Ham Luong estuaries. There were 92 genera (71 genera in Ham Luong and 62 genera in Cung Hau) of nematodes recorded in both estuaries. The mean nematode densities varied between 90 ± 31 - 1524 ± 269 ind.10 cm² and 105 ± 79 - 1120 ± 534 ind.10 cm² in Ham Luong and Cung Hau estuary, respectively.

12p trinhthamhodang 24-10-2019 17 1   Download

This study determined the seasonal variability of free-living nematode communities structure (genus/family level) in organic shrimp farms ponds in Tam Giang commune, Nam Can district, Ca Mau province.

8p vixuka2711 06-06-2019 7 0   Download

In this study we investigated the spatial patterns of nematode communities on different horizontal scales in the Tien Yen Estuary. More specifically, we wanted to address the following question: what is the contribution of different spatial scales on the total nematode biodiversity for this area?

7p meolep5 07-01-2019 13 1   Download

Results showed that the meiofauna, especially Nematode communities at the Tam Giang’s organic shrimp farms (TGOSF) in Ca Mau mangrove express high densities and biodiversity and Nematoda dominate numerically in the mangrove meiofauna (73.69 to 96.2 %). In total, 15 major taxa were found with the dominant taxa belonged.

14p cumeo4000 01-08-2018 24 0   Download