scholarly journals Identifying Early Stages of Freshwater Fish with DNA Barcodes in Several Sinkholes and Lagoons from the East of Yucatan Peninsula, Mexico

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 513
Author(s):  
Adrián Emmanuel Uh-Navarrete ◽  
Carmen Amelia Villegas-Sánchez ◽  
José Angel Cohuo-Colli ◽  
Ángel Omar Ortíz-Moreno ◽  
Martha Valdez-Moreno
Keyword(s):  
Freshwater Fish ◽  
Ecological Monitoring ◽  
Abundant Species ◽  
Dna Barcodes ◽  
Human Pressure ◽  
Early Stages ◽  
Putative Species ◽  
Conservation Plans ◽  
First Time ◽  
Management And Conservation

Our work shows the efficacy of DNA barcoding for recognizing the early stages of freshwater fish. We collected 3195 larvae and juveniles. Of them, we identified 43 different morphotypes. After DNA barcodes of 350 specimens, we ascertained 7 orders, 12 families, 19 genera, 20 species, and 20 Barcode Index Numbers, corresponding to putative species. For the first time, we reported the presence of the brackish species, Gobiosoma yucatanum in Lake Bacalar. Specimens of the genus Atherinella sp. and Anchoa sp. are possibly new species. Using both methods, morphology, and DNA barcodes, we identified 95% of the total larvae collected (2953 to species, and 78 to genus), and all of them were native. From them, the order Gobiiformes represented 87%. The most abundant species were Lophogobius cyprinoides and Dormitator maculatus, followed by Gobiosoma yucatanum and Ctenobius fasciatus. The Muyil and Chuyanché lagoons have the highest number of species. We present for the first time a short description of Cyprinodon artifrons and Floridichthys polyommus. This information conforms an indispensable baseline for ecological monitoring, to evaluate impacts, and developing management and conservation plans of biodiversity, principally in areas under human pressure such as Sian Ka’an, and Lake Bacalar, where tourism is high and growing in disorder.

ICHTHYOFAUNA OF TRIBUTARY STREAMS OF THE CINZAS RIVER BASIN, PARANAPANEMA RIVER, BRAZIL

2021 ◽  
Vol 25 (01) ◽  
pp. 142-153
Author(s):  
Dyego Leonardo Ferraz Caetano ◽  
◽  
Edson Fontes de Oliveira ◽  
Cláudio Henrique Zawadzki ◽  
◽  
...  
Keyword(s):  
Species Richness ◽  
River Basin ◽  
Native Species ◽  
Poecilia Reticulata ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Abundant Species ◽  
Richness Estimators ◽  
Conservation Plans ◽  
First Time

Streams are environments that are very affected by human activities such as pollution, deforestation of riparian forests and introduction of exotic species. In this context, it is important to know its biodiversity for monitoring and conservation. The present study inventoried the fish fauna of three tributary streams of the Jacarezinho River (Cinzas River basin, Paranapanema River) with different environmental characteristics: Água dos Anjos, Monjolinho and Ubá streams. Quarterly collections were performed in the period between October 2012 and July 2013 at the headwaters, in the middle and at the mouth of each stream, using electrofishing. We analyzed the parameters of species richness, total abundance, relative abundance, capture constancy, rarefaction curves of Coleman, and richness estimators ACE and ICE. We captured a total of 7102 individuals, distributed in six orders, 12 families and 33 species. The most abundant order was Characiformes (76.15 %), while the most abundant species were: Bryconamericus iheringii (39.5 %), Astyanax bockmanni (19.36 %), and Geophagus brasiliensis (7.52 %). The highest species richness was found in Água dos Anjos stream (26), followed by Monjolinho stream (25), and the Ubá stream (15). We recorded the occurrence of four non-native species (Bryconamericus exodon, Gymnotus inaequilabiatus, Poecilia reticulata and Oreochromis niloticus), which represent a risk to the biodiversity of the studied streams. The Ubá stream was considered the most conserved, but the presence of P. reticulata shows that it has also suffered from anthropic impacts. This non-native species is constantly associated to degraded environments, mainly when it occurs in high abundance. Our results suggest that the fish assemblages studied present different structures, probably due to the interaction among historical, abiotic, biotic, and anthropic factors. This study has been carried out for the first time in the Cinzas River basin and can help provide theoretical input for the elaboration of monitoring and conservation plans.

scholarly journals Species of Geotrupidae (Coleoptera: Scarabaeoidea) in Aquidauana, Mato Grosso do Sul, Brazil

2013 ◽  
Vol 13 (1) ◽  
pp. 349-352
Author(s):  
Sérgio Roberto Rodrigues ◽  
Anderson Puker
Keyword(s):  
Organic Matter ◽  
Light Trap ◽  
Abundant Species ◽  
Ecological Role ◽  
Mato Grosso ◽  
The Family ◽  
Total Capture ◽  
First Time ◽  
Mato Grosso Do Sul

Coleoptera of the family Geotrupidae play an important ecological role in the decomposition of animal and plant organic matter. In Brazil there is little information on the diversity and distribution of this group, thus, this work had a purpose to study Geotrupidae species, occurring in Aquidauana, MS. A survey for geotrupids was conducted in Aquidauana, Mato Grosso do Sul, Brazil. Beetles were captured using a light trap over a period of two years, from January 2006 to December 2007. A total of 907 specimens were collected and identified to eight species. From the subfamily Bolboceratinae, the species identified were Bolbapium minutum (Luederwaldt, 1929) and Pereirabolbus castaneus (Klug, 1845). In the subfamily Athyreinae the species identified were Athyreus bilobus Howden & Martínez, 1978, Parathyreus aff. bahiae, Neoathyreus aff. julietae, N. sexdentatus Laporte, 1840, N. centromaculatus (Felsche, 1909) and N. goyasensis (Boucomont, 1902). Four species (A. bilobus, N. centromaculatus, N. goyasensis and P. castaneus) are reported for the first time in Aquidauana, MS, Brazil. The most abundant species, representing 85.9% of the total capture, was B. minutum. The greatest numbers of specimens was caught from October to December of both years of the study.

Studies on some Sporozoa in Polychaete Worms

Parasitology ◽  
1930 ◽  
Vol 22 (3) ◽  
pp. 370-398 ◽  
Author(s):  
Harendra Nath Ray
Keyword(s):  
Life Histories ◽  
Morphological Characters ◽  
Diagnostic Characters ◽  
Early Stages ◽  
First Time

1. The main facts in Brasil's (1907) account of the intracellular schizogony inSelenidium caulleryifromProtula tubulariahave been confirmed. Early stages in the sporogony of this species are described now for the first time.2. Intracellular schizogony is described for the first time inSelenidium mesniliBrasil fromMyxicola infundibulum, and here also the early stages in sporogony are noted for the first time.3. The life histories of Caullery and Mesnil's two unnamed species ofSelenidium(now calledS. spionis(Köll.) andS. foliatumn.sp.) fromScolelepis fuliginosahave been exhaustively studied. No schizogonic phase has been observed in either. The gametocysts, here described for the first time, are found to develop fully only after escape into the sea. The gametocysts ofS. spionisare ovoid, 108μ x 60μ and contain spores with four sporozoites: those ofS. foliatumare spherical, 70μ in diameter, and their spores contain eight sporozoites.4. New or hitherto little known species ofSelenidiumare recorded fromCirratulus cirratusMüll.,Branchiomma vesiculosumMont.,Sabella pavoninaSav.,Pomatoceros triqueterL. andTerebella lepidoriaKühl, and the morphological characters of the trophozoites are described.5. A discussion follows of the value of the diagnostic characters of the genusSelenidium. It is suggested that this genus requires drastic revision and will probably have to be dismembered. Stress is laid, however, on the occurrence in all the gregarines examined, and at all the observed stages of their development, of characteristic chromatic bodies at the anterior end, structures which have hitherto escaped the notice of most observers.

scholarly journals A new species of Litarachna Walter, 1925 (Acari: Hydrachnidia: Pontarachnidae) from Corozal Bay (Belize), described based upon morphology and DNA barcodes

Acarologia ◽  
2021 ◽  
Vol 61 (3) ◽  
pp. 602-613
Author(s):  
Lucia Montes-Ortiz ◽  
Tom Goldschmidt ◽  
Lourdes Vásquez-Yeomans ◽  
Manuel Elías-Gutiérrez
Keyword(s):  
Dna Barcode ◽  
Morphological Description ◽  
Estuarine System ◽  
Dna Barcodes ◽  
Sem Images ◽  
The Family ◽  
Coi Sequences ◽  
First Time ◽  
A New Species ◽  
Electronic Microscope

A new planktonic species of the marine water mites of the family Pontarachnidae Koenike, 1910 is described from Corozal Bay, an estuarine system in Belize. The morphological description includes Scanning Electronic Microscope (SEM) images and is augmented by an analysis of DNA cytochrome c oxidase I (COI) sequences, the DNA barcode, used for the first time for a species description in this group.

Memoirs: On the unsegmented ovum of Echidna (Tachyglossus)

1930 ◽  
Vol s2-74 (293) ◽  
pp. 119-132
Author(s):  
T. THOMSON FLYNN
Keyword(s):  
Early Stages ◽  
Polar Bodies ◽  
First Time

1. In this communication is described for the first time the unsegmented germinal disc of the monotreme Echidna (Tachyglossus), and measurements are also given of living intra-uterine eggs at early stages. 2. Segmentation is not initiated in Echidna until the egg has arrived in the uterus. 3. The polar bodies are much smaller than those described for Ornithorhynchus. The first is much larger than the second but, contrary to what has been reported to occur in Ornithorhynchus, remains undivided. 4. The germ nuclei, immediately before the formation of the first cleavage spindle, undergo conjugation and fusion. 5. Contrary to what is described for Ornithorhynchus, polyspermy does not normally occur in the fertilization of the ovum of Echidna.

Description of new apterous winter species of Leuctra (Plecoptera: Leuctridae) based morphology and DNA barcoding and further records to stonefly fauna of the Caucasus, Georgia 

Zootaxa ◽  
2019 ◽  
Vol 4585 (3) ◽  
pp. 547
Author(s):  
VALENTINA A. TESLENKO ◽  
DMITRY M. PALATOV ◽  
ALEXANDER A. SEMENCHENKO
Keyword(s):  
New Species ◽  
Dna Barcoding ◽  
Interspecific Variation ◽  
Genetic Distances ◽  
Dna Barcodes ◽  
The Caucasus ◽  
Diagnostic Characters ◽  
Males And Females ◽  
Lesser Caucasus ◽  
First Time

Leuctra adjariae sp. n. and Leuctra georgiae sp. n. (Plecoptera: Leuctridae) are described as two new apterous stonefly species from the Meskheti Range (Lesser Caucasus) in southwestern Georgia. Descriptions and illustrations are provided for both sexes and diagnostic characters are discussed. Males and females of the two species are associated by DNA barcodes. Comparisons with corresponding regions of COI between L. adjariae sp. n. and L. georgiae sp. n. produced K2P genetic distances of 8.38%, values well associated with interspecific variation. The well-supported monophyly as well as results of an ABGD analysis confirms the validity of both new species. Capnioneura gouanerae Vinçon & Sivec, 2011, previously described and known only from Turkey, is reported for the first time for the Caucasus. 

scholarly journals aS1-Casein Lineage Assessed by RFLP in the Endangered Goat Breed “Retinta Extremeña”

2015 ◽  
Vol 5 (1) ◽  
pp. 32
Author(s):  
José L. Fernández-García ◽  
María P. Vivas Cedillo
Keyword(s):  
Fatty Acid Content ◽  
Raw Milk ◽  
Allelic Frequency ◽  
Null Alleles ◽  
Goat Breed ◽  
Genetic Studies ◽  
Animal Genetic Resources ◽  
Pcr Rflp ◽  
Conservation Plans ◽  
First Time

<p class="1Body">The Retinta Extremeña goat is a well-adapted breed to "Dehesa" environment. Traditionally their raw milk is used to make artisan cheese. However, crosses with specialized breeds are occurring since the eighties, this goat breed has been declared of special protection by the Spanish Agriculture Ministry (R.D. 1682/1997 and R.D. 229/2008). Genetic studies about casein variants have been mainly performed on Spanish goats of high milk yields because the caseins are a relevant fraction of milk. But recent studies claimed to study the caseins in all breeds, including threatened goat breeds to decide about its conservation value. This study was focused on the aS1-casein in the endangered “Retinta Extremeña” goat for the first time to enhance its conservation interest. Genomic DNA of seventy five pureblood goats was studied. A PCR-RFLP assay was designed to find a B<em>my</em>I target that distinguishing A versus B2 lineages (including recombinant variant M and B1, respectively) of the aS1-casein locus. The allelic frequency of variants related to A lineage (CAG triplet) was 14.0% similar to other southwestern Spanish breeds. It is suggested that individuals or families carrying A lineage should be more studied to detect less allergen null alleles while the opposite allele pools of the B2 lineages should be tested for alleles associated to unsaturated fatty acid content. Therefore, the priorities for conservation plans of animal genetic resources as threatened goat breeds; more investigation is claimed in the aim to study for proved useful alleles of certain genes, as casein variants.</p>

scholarly journals Species composition and diversity of cast net fisheries in New Calabar River, Niger Delta, Nigeria

2018 ◽  
Vol 4 (1) ◽  
pp. 19-26 ◽  
Author(s):  
HE Dienye ◽  
OA Olopade ◽  
SA Toby
Keyword(s):  
Decapod Crustacean ◽  
Abundant Species ◽  
Diversity Indices ◽  
Fish Stock ◽  
Base Line ◽  
Fisheries Resources ◽  
Fish Samples ◽  
Catch Composition ◽  
Rivers State ◽  
Management And Conservation

A study on the catch composition and diversity of cast net fisheries was conducted between May and August, 2017 in the New Calabar River, Rivers state, using cast net of varying mesh sizes (1.5mm and 2.5mm). Fish samples were collected from three sampling stations, viz. Station1- Aluu, Station 2- Choba and Station 3- Iwofe. The fish species recorded comprised of 26 species under 11 families, and one decapod crustacean. The three most abundant species were; Coptodon guineensis (25.11%), Coptodon zilli (18.56%) both from the Cichlidae family, and Penaeus nitialis (10.90%) from the Penaeidae family, while the least abundant species was Liza grandisquamis (0.13%) from the Mugilidae family. The diversity indices showed that station 2 recorded the highest number of species (21) while station 1 recorded the lowest with (12) species. Simpson’s indexes of diversity, Simpson’s reciprocal index, Shannon- weiner index, and Pielou’s evenness index, were estimated. This study serves as a base line data which will assist relevant bodies in the management and conservation of fisheries resources in the New Calabar River. It is therefore recommended that for an improved and sustainable exploitation and management of fisheries resources of the New Calabar River, proper monitoring and management for fish stock must be done.J. Biodivers. Conserv. Bioresour. Manag. 2018, 4(1): 19-26

Complete Field Guide to Dragonflies of Australia

2006 ◽  
Author(s):  
Gunther Theischinger ◽  
John Hawking
Keyword(s):  
Environmental Protection ◽  
Freshwater Fish ◽  
Well Being ◽  
Detailed Knowledge ◽  
Field Guide ◽  
Distribution Maps ◽  
Identification Keys ◽  
Complete Field ◽  
First Time ◽  
Important Basis

Dragonflies and damselflies are conspicuous insects – many are large and brightly coloured. Here for the first time is a comprehensive guide to the Australian dragonfly fauna. The book includes identification keys not only for adults but also for their larvae, commonly known as ‘mud eyes’ and often used as bait for freshwater fish. With stunning full-colour images and distribution maps, the book covers all 30 families, 110 genera and 324 species found in Australia. Dragonflies are valuable indicators of environmental well-being. A detailed knowledge of the dragonfly fauna and its changes is therefore an important basis for decisions about environmental protection and management. Their extraordinary diversity will interest entomologists and amateur naturalists alike.

New records of water mites (Acari: Hydrachnidia) from Sri Lanka with description of four new species and some remarks of relationships

2020 ◽  
Vol 25 (9) ◽  
pp. 1589-1610
Author(s):  
Andrzej Zawal ◽  
Izabela Szućko ◽  
Magdalena Szenejko ◽  
Lidia Skuza ◽  
Aleksandra Bańkowska ◽  
...  
Keyword(s):  
New Species ◽  
Sri Lanka ◽  
New Records ◽  
Dna Barcodes ◽  
Water Mites ◽  
Water Mite ◽  
Standing Waters ◽  
First Time

New records of water mites (Acari: Hydrachnidia) from the standing waters of Sri Lanka are presented. Fifteen species have been registrated, among them four species, i.e. Piona srilankana (Pionidae), Neumania edytae (Unionicolidae), Krendowskia (Krendowskiella) srilankana (Krendowskiidae), and Mideopsis ewelinae (Mideopsidae) are described as new to science. DNA was extracted from 18 water mite specimens and DNA barcodes are given for the first time for nine species.

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