Molecular comparison of geographically extreme populations of fish species of wide Indo-Pacific distribution

2013 ◽  
Vol 59 (4) ◽  
pp. 197-200 ◽  
Author(s):  
Yaron Tikochinski ◽  
Marina Friling ◽  
Nave Harush ◽  
Roy Lizarovich ◽  
Nitzan Manor ◽  
...  

A total of six Red Sea inshore fish species with wide Indo-Pacific distribution, including Lessepsian migrants that reached the Mediterranean Sea via the Suez Canal, were studied and compared genetically to conspecific populations from Japan and the Seychelles. Examination of the cytochrome c oxidase 1 (COI) gene of Apogon cyanosoma, Sargocentron rubrum, Upeneus moluccensis, Spratelloide sdelicatulus, Gerres oyena and Terapon jarbua from Japan, the Red Sea, the Seychelles and the Mediterranean revealed that in five out of six fish species, a difference greater than 4% was found. These results indicate the importance of DNA genetic analysis in revealing possible cryptic species and supplementing classic taxonomic studies, as well as contributing to a reappraisal of the zoogeography and evolution of Indo-Pacific ichthyofauna and enhancing our understanding of fish biodiversity.

2013 ◽  
Vol 14 (3) ◽  
pp. 113-121
Author(s):  
Madhu Thapliyal ◽  
Bipin Kumar Sati ◽  
Ravi Kumar ◽  
Tribhuwan Chandra ◽  
Ashish Thapliyal

The entire Himalayan region is well known as a global hotspot for biodiversity. Many workers have documented different aspect of biodiversity.  The Uttarakhand Himalaya region, a part of Himalayan system, is very rich in fresh water aquatic biodiversity because it has many fresh water streams and rivers within a short distance of 200 miles. All these fresh water bodies harbor diverse aquatic fauna with fishes being the most extensively studied. There are many fish species reported by many authors in Uttarakhand. Many of the fishes have similar morphological characters (morpho-metrics) and are difficult to identify. Attempts have been made to generate the DNA barcode of fishes but most of the attempt are limited to major rivers i.e. the Ganges and the Yamuna. Besides these two prominent river (the Ganges & the Yamuna), there are many supporting streams and small tributaries that are also inhabited by many species. No “long term” and “entire river scan” for fish species has ever been conducted in Uttarakhand. Our research aims to generate a molecular database (DNA Barcode) for entire fish species fauna in each small river/stream of Uttarakhand.  Using a combination of morphometric & DNA bar-coding data will provide an efficient method for species level identification and contributes considerably to taxonomic and biodiversity research. The present study is first step towards establishing molecular taxonomy database of Uttarakhand based upon the bar coding pattern of cytochrome c oxidase I (COI) gene.  We carried out an “entire river scan” of River Song (a tributary of river Ganges).  50 samples were collected from various sampling sites along the entire stretch of river and analyzed.   Data was uploaded into the BOLD database and the analysis of data using this database suggests that the genetic variability (K2P distance) distribution of 50 individuals belonging with 15 species.The average intraspecific variation using K2P and NJ methods/models was assessed. The mean intraspecific distance was less than 1.45% for 32% of species. Mean K2P distance within species, genus and family was 0.1%, 16.3% and 21.70% respectively. Our results suggest that River Song has diverse fish fauna with substantial genetic diversity.  Data from Barillius species suggests that this species has a very high variation.  There is ahighly probability that as all the rivers are scanned new data on endemic and exotic fish fauna diversity will emerge which would be helpful in conservation efforts.


Pathogens ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 299
Author(s):  
Georgios Sioutas ◽  
Styliani Minoudi ◽  
Katerina Tiligada ◽  
Caterina Chliva ◽  
Alexandros Triantafyllidis ◽  
...  

Dermanyssus gallinae (the poultry red mite, PRM) is an important ectoparasite in the laying hen industry. PRM can also infest humans, causing gamasoidosis, which is manifested as skin lesions characterized by rash and itching. Recently, there has been an increase in the reported number of human infestation cases with D. gallinae, mostly associated with the proliferation of pigeons in cities where they build their nests. The human form of the disease has not been linked to swallows (Hirundinidae) before. In this report, we describe an incident of human gamasoidosis linked to a nest of swallows built on the window ledge of an apartment in the island of Kefalonia, Greece. Mites were identified as D. gallinae using morphological keys and amplifying the Cytochrome C oxidase subunit I (COI) gene by PCR. Bayesian phylogenetic analysis and median-joining network supported the identification of three PRM haplogroups and the haplotype isolated from swallows was identical to three PRM sequences isolated from hens in Portugal. The patient was treated with topical corticosteroids, while the house was sprayed with deltamethrin. After one week, the mites disappeared and clinical symptoms subsided. The current study is the first report of human gamasoidosis from PRM found in swallows’ nest.


Author(s):  
Sumaira Yousaf ◽  
Abdul Rehman ◽  
Mariyam Masood ◽  
Kazam Ali ◽  
Nazia Suleman

AbstractThe fall armyworm (FAW), an invasive pest of maize, is an emerging threat in Southern Asia after America and Europe. Recently, this notorious pest has also been found in different areas of Pakistan. To assess its presence in Pakistan, a survey was carried out in the provinces of Punjab, Sindh, and Khyber Pakhtunkhwa during May–October 2019. We observed the highest incidence of FAW in Sindh with maximum impact in districts Tando-Allahyar and Hyderabad. These samples were identified as Spodoptera frugiperda on the morphological and taxonomical bases. However, morphological identification of this pest is very difficult at early larval instars. Here, we use the mitochondrial cytochrome c oxidase I (COI) gene region for the precise identification of larva of this invasive pest at species level. Two different regions of COI gene (COI-5′ and COI-3′) were used as molecular markers for the identification of this species. DNA sequence similarity searches of the obtained COI gene sequences (NCBI GenBank Accession Nos. MW241537, MW241538, MW349515, MW349516, MW349493 and MW349494) revealed that genetically it is more than 99% identical to S. frugiperda. The phylogenetic analysis indicated it as the rice-strain (R-strain). Both 3′- and 5′-fragment tree topologies showed that the collected samples of the FAW species belong to the R-strain. To the best of our knowledge, this is the first report providing molecular evidence for the existence of R-strain of S. frugiperda that was found feeding on maize crop in Sindh, Pakistan, using COI gene sequences as a marker.


2020 ◽  
Vol 6 ◽  
pp. 1-4
Author(s):  
Stanislav K Korb

We submitted first results of the DNA studies of the Central Asiatic owlet moths of the genus Euchalcia. Standard cytochrome C oxidase subunit I (COI) gene fragments were sequenced for DNA barcoding of six specimens belonging to Euchalcia herrichi and Euchalcia gyulai. We compared the received sequences between discussed species and with two European Euchalcia species (E. variabilis and E. consona). We found no variability within the COI sequences of the samples collected in the same locality (Alai Mts., Kyrgyzstan), whereas the difference in COI sequences between two populations (Ketmen Mts., Kazakhstan and Alai Mts., Kyrgyzstan) was 0.005.


Jurnal MIPA ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Claudius F. Kairupan ◽  
Jantje Pelealu ◽  
Juliet M.E. Mamahit

Daerah Modoinding dan Tomohon di Sulawesi Utara, dikenal sebagai  daerah penghasil sayuran kubis di Indonesia. Sayuran kubis memiliki hama utama yaitu Plutella xylostella. Penyebab serangga ini dapat bertahan hingga saat ini karena adanya sifat resistensi akibat pemberian insektisida yang berlebihan. Penelitian ini dilakukan untuk menganalisis variasi pada gen cytochrome C oxidase IPlutella xylostella yang diperoleh dari dua lokasi yang berbeda, yaitu Modoinding dan Tomohon. Analisis sekuens menunjukkan adanya perbedaan pasang basa nukleotida dari sampel yang berbeda lokasi. Selain itu, variasi juga ditunjukkan pada sampel yang diperoleh dari basis data GenBank dengan adanya perbedaan 1-14 pasang basa nukleotida dengan spesimen pada penelitian ini. Hubungan kekerabatan gen COI P. xylostella keseluruhan sampel tergolong dalam variasi intraspesies dengan nilai jarak genetik berkisar antara 0-0,022 (0-2,20%).Modoinding and Tomohon areas in North Sulawesi, are known as regions in Indonesia that produce a cabbage. The main pest of cabbage, Plutella xylostella. This insect can survive due to its resistance resulted from prolonged insecticide application. This study aims to analyze genetic variation of COI genes in P. xylostella from Modoinding and Tomohon areas. Sequence analysis showed there were differences in nucleotide base pairs between these locations. In addition, variations were also shown in samples obtained from the GenBank database with differences in 1-14 nucleotide base pairs with specimens in this study. The genetic relationship of P. xylostella COI gene in all samples was classified as intraspecific variation with genetic distance values ranging from 0-0,022 (0-2,20%).D aerah Modoinding dan Tomohon di Sulawesi Utara, dikenal sebagaidaerah penghasil sayuran kubis di Indonesia. Sayuran kubis memilikihama utama yaitu Plutella xylostella. Penyebab serangga ini dapatbertahan hingga saat ini karena adanya sifat resistensi akibat pemberianinsektisida yang berlebihan. Penelitian ini dilakukan untuk menganalisisvariasi pada gen cytochrome C oxidase I Plutella xylostella yang diperolehdari dua lokasi yang berbeda, yaitu Modoinding dan Tomohon. Analisissekuens menunjukkan adanya perbedaan pasang basa nukleotida darisampel yang berbeda lokasi. Selain itu, variasi juga ditunjukkan padasampel yang diperoleh dari basis data GenBank dengan adanyaperbedaan 1-14 pasang basa nukleotida dengan spesimen padapenelitian ini. Hubungan kekerabatan gen COI P. xylostella keseluruhansampel tergolong dalam variasi intraspesies dengan nilai jarak genetikberkisar antara 0-0,022 (0-2,20%).


Zootaxa ◽  
2021 ◽  
Vol 4956 (1) ◽  
pp. 1-108
Author(s):  
DANIEL GOLANI

This checklist of the Mediterranean fishes of Israel enumerates 469 species which is an addition of 62 species since the previous checklist of 2005. This new checklist includes 58 Condrichthys and 411 Osteicthys species. Most newly-recorded species are of Red Sea origin (Lessepsian migrants)—38 species, 25 species are from previously poorly investigated habitats, mainly deep water, while two species reached the Mediterranean most likely by ballast water and two are aquaculture escapees.                The dramatic increase in the number of Lessepsian migrants (an average of 2.5 species per year) is most likely due to the increased water influx between the Red Sea and the Mediterranean, following the recent opening of the new parallel, 72 km, “new canal” and the enlargement of other parts of the Suez Canal. 


2019 ◽  
Vol 7 (4) ◽  
Author(s):  
Selene Rubiola ◽  
Francesco Chiesa ◽  
Stefania Zanet ◽  
Tiziana Civera

Sarcocystis spp. are protozoan parasites with an obligatory two-host life cycle, with herbivores as intermediate hosts and carnivores as definitive hosts. Cattle are intermediate hosts for several species of Sarcocystis: indeed, in addition to S. cruzi, S. hirsuta and S. hominis, at least four new species were recently identified in bovine muscle: S. bovifelis, S. rommeli, S. bovini and S. heydorni. Since is not possible to unambiguously discriminate between S. hominis and the new species either morphologically or by the analysis of the 18S ribosomial (rRNA) gene, the aim of the present study was to use molecular techniques to discriminate cattle Sarcocystis species, taking advantage of the higher discriminative power of the Cytochrome C Oxidase subunit I mitochondrial (mtDNA COI) gene. Therefore, 119 bovine muscle samples were tested to identify S. hominis-like sarcocystis using a multiplex PCR of the 18S rRNA gene; later, positive samples were tested using a newly designed primer set for the PCR amplification of COI gene. Species identification was achieved by sequencing the amplified products: 16 sequences were confirmed to belong to S. bovifelis, while 12 sequences didn’t constitute the best BLAST match of any of the published sequences, allowing to speculate the possible presence of S. hominis. This study confirms the higher discriminatory power of COI mitochondrial gene; besides, our work provides the first report of S. bovifelis in Italy.


2019 ◽  
Vol 39 (6) ◽  
pp. 758-763
Author(s):  
Heriberto Deleon ◽  
Juan Garcia ◽  
Dionn Carlo Silva ◽  
Oscar Quintanilla ◽  
Zen Faulkes ◽  
...  

Abstract The parthenogenetic marbled crayfish, or Marmorkrebs (Procambarus virginalis Lyko 2017), is an emerging model organism. We describe a method to isolate cells from early-stage embryos and culture them in vitro. The identity of the cells was confirmed by sequencing the cytochrome c oxidase subunit I (COI) gene. This technique can be applied for use in the manipulation of embryonic parthenogenetic crayfish cells.


Sign in / Sign up

Export Citation Format

Share Document