scholarly journals Identification of fish stocks of river crocker (Plagioscion ternetzi) in Paraná and Paraguay rivers by using otolith morphometric analysis

2017 ◽  
Vol 43 (4) ◽  
pp. 718-725
Author(s):  
Esteban Avigliano ◽  
Guy Comte ◽  
Juan José Rosso ◽  
Ezequiel Mabragaña ◽  
Paola Della Rosa ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Anterior Margin ◽  
T Test ◽  
Basic Requirement ◽  
Fish Stocks ◽  
Paraguay River ◽  
Multiparametric Analysis ◽  
Study Sites ◽  
First Time ◽  
Middle Paraná

The identification of fish stocks in basic requirement for fishing management. The objective of this research was to describe for the first time otoliths river crocker (Plagioscion ternetzi) and to evaluate the existence of different fish stocks in the Paraguay River lower basin and the middle Paraná River (northeast Argentinean region and southeast Paraguayan region). For this purpose, five morphometric indexes applied on sagitta otolith (rectangularity, circularity AO/SO, SS/SO and PS/PO) were compared between the study sites. The sagittae otoliths are semicircular and with smooth edges. Sulcus acusticusis is heterosulcoid and curved, with an ostium open widely in the anterior margin of the otolith. Significant differences were observed for circularity, rectangularity, SS/SO and PS/PO (t-test, P < 0.05). The T2 Hotteling multiparametric analysis showed significant differences between the study sites (P < 0.006), while the canonical discriminant showed a high classification percentage of the individuals (>69%). The results indicates that the stocks populations would be partially separated, with a considerable flow of individuals between these rivers.

scholarly journals Updated checklist and diversity of predatory insect fauna with one first report from Kashmir, India

2020 ◽  
Vol 89 (3 - Ahead of print) ◽  
pp. 142-152
Author(s):  
Razia Rasheed ◽  
Abdul Ahad Buhroo
Keyword(s):  
Diversity Indices ◽  
T Test ◽  
Kashmir Valley ◽  
Insect Fauna ◽  
First Report ◽  
Predatory Insect ◽  
Study Sites ◽  
First Time

The diversity of predatory insect fauna in nine districts of Kashmir was assessed. Collection was done in agroecosystem with the help of different collecting nets and handpicking methods. As a result of two-year study, a total of 50 species belonging to 14 families and 7 orders were identified. Hierodula patellifera Serville, 1839 of the order Mantodea was reported for the first time from the Kashmir valley. Also, different diversity indices used during the present study revealed the existence of considerable number of predatory species distributed evenly throughout the study area. Diversity of different study sites was correlated by Hutcheson’s t- test. Highest values of diversity indices were observed in the order Coleoptera.

scholarly journals Comparison of histometric and morphometric analyses of bone height in ligature-induced periodontitis in rats

2007 ◽  
Vol 21 (3) ◽  
pp. 216-221 ◽  
Author(s):  
Marilene Issa Fernandes ◽  
Eduardo José Gaio ◽  
Rui Vicente Oppermann ◽  
Pantelis Varvaki Rados ◽  
Cassiano Kuchenbecker Rosing
Keyword(s):  
Periodontal Disease ◽  
Morphometric Analysis ◽  
Wistar Rats ◽  
T Test ◽  
The Other ◽  
Limited Capacity ◽  
Height Measurement ◽  
Morphometric Analyses ◽  
Left And Right ◽  
Bone Height

The purpose of this study was to compare histologic and morphometric procedures of bone height measurement. Microscopic measurements are the most frequent methods in periodontal studies with animals, but have limited capacity to identify bone levels associated with both healthy tissues and periodontal disease. Ligatures were placed in the maxillary left second molars of 10 male 60-day-old Wistar rats for 30 days. Left and right maxillary sides of 5 rats were processed for histologic analysis (H), sectioned buccolingually, and stained with HE. The maxillae of the other 5 rats were defleshed and used for morphometric analysis (M). Histometric measurements from the cementoenamel junction to the bone crest were performed. Standardized photographs were used for morphometric analysis. The t test was used for dependent or independent samples (alpha = 0.05%). Distances from cementoenamel junction to bone crest were 0.95 ± 0.25 and 1.07 ± 0.30 mm for H and M, respectively. Buccal measurements were 0.92 ± 0.16 and 1.08 ± 0.35 mm for H and M. The values obtained using H and M for areas without ligatures were 0.44 ± 0.15 and 0.47 ± 0.11 mm for lingual measurements and 0.23 ± 0.08 and 0.41 ± 0.10 mm for buccal measurements. No significant differences were found between the two methods in the detection of bone height associated with the placement of ligatures in rats.

scholarly journals On two species of Riocypris (Crustacea, Ostracoda) from northern Patagonia and their relation to Eucypris fontana: implications in paleoenvironmental reconstructions

2018 ◽  
Vol 96 (8) ◽  
pp. 801-817 ◽  
Author(s):  
C.A. Coviaga ◽  
A.P. Pérez ◽  
L.Y. Ramos ◽  
P. Alvear ◽  
G.C. Cusminsky
Keyword(s):  
Sexual Dimorphism ◽  
Morphometric Analysis ◽  
Indicator Species ◽  
Taxonomic Status ◽  
Geometric Morphometric ◽  
Comparative Analyses ◽  
Northern Patagonia ◽  
Geometric Morphometric Analysis ◽  
The Individual ◽  
First Time

Two species of ostracods new to Patagonia, Argentina, are described. One of them, Riocypris whatleyi sp. nov., is described for the first time, and the second, Riocypris sarsi (Daday, 1902) comb. nov., is reallocated from genus Eucypris to genus Riocypris. Inter- and intra-specific variations in shape, size, and sexual dimorphism were evaluated based on geometric morphometric analysis. Moreover, morphological and morphometric comparative analyses were applied to re-examine living and quaternary specimens recovered from previous studies. Based on these results, a generic reassignment for the Patagonian Eucypris fontana (Jurine, 1820) into the genus Riocypris is proposed. Contributing to the knowledge on the systematic and autecology of this enigmatic species, widely distributed in Patagonia and frequently used in paleolimnological reconstructions, generates science-based evidence for their use as indicator species. Additionally, our results emphasize the usefulness of studying the living representatives (i.e., with valves and appendages) for elucidating the taxonomic status of the individual specimens, especially those present in paleontological records and used as bioproxies in paleolimnological studies.

The karyotype of Sorex arcticus maritimensis (Insectivora, Soricidae) and its systematic implications

1988 ◽  
Vol 66 (9) ◽  
pp. 1968-1972 ◽  
Author(s):  
V. T. Volobouev ◽  
C. G. van Zyll de Jong
Keyword(s):  
Morphometric Analysis ◽  
Banding Pattern ◽  
Diploid Number ◽  
Sorex Araneus ◽  
Exact Nature ◽  
Full Understanding ◽  
Monophyletic Origin ◽  
Fundamental Number ◽  
First Time

The chromosomes of Sorex arcticus maritimensis are described for the first time and their banding pattern (R- and C-bands) compared with those of Sorex araneus. The results provide further evidence for the monophyletic origin of the araneus–arcticus group and clearly indicate that the primary mechanisms of chromosomal reorganization in this group have been Robertsonian and tandem translocations. The basic karyotype of S. a. maritimensis was found to differ from that of S. a. arcticus in having a different fundamental number (34 vs. 38) but the same diploid number. A full understanding of the karyotypic differences between these taxa requires further work. Whatever the exact nature of the differences, they increase the likelihood of an independent specific status for S. a. maritimensis as suggested by the results of an earlier morphometric analysis.

Macrobiotus derkai, a new species of Tardigrada (Eutardigrada, Macrobiotidae, huziori group) from the Colombian Andes (South America)

Zootaxa ◽  
2008 ◽  
Vol 1731 (1) ◽  
pp. 1 ◽  
Author(s):  
PETER DEGMA ◽  
ŁUKASZ MICHALCZYK ◽  
ŁUKASZ KACZMAREK
Keyword(s):  
New Species ◽  
South America ◽  
Sierra Nevada ◽  
Morphometric Analysis ◽  
Similar Species ◽  
Moss Sample ◽  
Colombian Andes ◽  
Alpine Zone ◽  
First Time ◽  
A New Species

A new species, Macrobiotus derkai sp. nov., is described from a moss sample collected in the alpine zone of Sierra Nevada del Cocuy Mts (NE Colombia). It differs from the most similar species, Macrobiotus huziori Michalczyk & Kaczmarek, 2006 mainly in the location of the second macroplacoid and in the dimensions of accessory points on the claws. Eggs of the new species have the same type of areolation as eggs of M. huziori but they differ from the latter in the size and number of processes. The differences between the new species and others having similar number and shape of placoids are discussed. An identification key for these species is also provided. A round depression on the dorsal head cuticle is reported in Tardigrada for the first time. The results of a morphometric analysis of the new species are also given.

scholarly journals Re-instatement of Sorbus harrowiana (Rosaceae), based on morphometric analysis

PhytoKeys ◽  
2020 ◽  
Vol 166 ◽  
pp. 29-39
Author(s):  
Meng Li ◽  
Steven P. Sylvester ◽  
Zhang-Pei Wang ◽  
Yi-Da Pei ◽  
Xin-Fen Gao ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Field Investigation ◽  
Flora Of China ◽  
First Time

Sorbus harrowiana (≡Pyrus harrowiana), previously considered a synonym of Sorbus insignis (≡Pyrus insignis) in the Flora of China, is re-instated here and shown to be distinct from S. insignis, based on morphometric analysis, coupled with herbarium and field investigation. We also present for the first-time full descriptions, distributional records and notes for S. harrowiana and S. insignis.

scholarly journals Grosse Fledermausvielfalt in den Waldnaturschutzgebieten des Kantons Zug

2016 ◽  
Vol 167 (5) ◽  
pp. 278-285
Author(s):  
Lucretia Deplazes ◽  
Annie Frey-Ehrenbold ◽  
Martin Ziegler ◽  
Fabio Bontadina
Keyword(s):  
Species Conservation ◽  
Nature Reserves ◽  
Target Species ◽  
Forest Reserves ◽  
Bat Activity ◽  
Alluvial Forests ◽  
Conservation Measures ◽  
National Priority ◽  
Study Sites ◽  
First Time

High bat diversity in forest nature reserves in the Canton Zug Switzerland harbours 30 bat species. Of these, more than 80% have at least part of their habitat in forests. All 22 Swiss priority bat species are considered as forest species. These include twelve forest target species, for which a specific management is required. However, because of the secretive life of bats, missing information on the presence of bat species precluded the implementation of targeted conservation measures. In the last years, new broadband ultrasound recorders were developed as a powerful tool to detect and identify bat species in forests. The aim of our study was to use these new methods to record the presence of bat species in five forest nature reserves in the Canton Zug, to analyse their activity and to evaluate the site-specific differences. During 258 nights of data collection, we recorded 30,522 bat passes of at least twelve different bat species. 23.5% of the recorded bat passes were species from the Swiss Red List. At least three national priority forest target species were detected and three species were discovered for the first time in the Canton Zug. The variation of bat activity between the different forest reserves was high. In particular, areas with diverse and light forest communities, which are rich in dead and decayed wood, proved to be attractive habitats to bats. Alluvial forests, open waters and the presence of old oaks enhanced the diversity of species and bat activity in general. These results were used to define one target species for each forest nature reserve in the study sites and to promote species conservation measures.

Maxillipiidae

Zootaxa ◽  
2009 ◽  
Vol 2260 (1) ◽  
pp. 703-707 ◽  
Author(s):  
CHARLES OLIVER COLEMAN
Keyword(s):  
Anterior Margin ◽  
Lizard Island ◽  
First Time

Maxillipius rectitelson Ledoyer, 1973 is redescribed. It was found for the first time in Australia close to Lizard Island. It differs from Maxillipius commensalis Lowry, 1984 by the unproduced anterior margin of coxa 1 and the bulky carpus and propodus of gnathopod 1.

GENERATION OF COMPLEMENT ACTIVATION PEPTIDES DURING STORAGE OF PLATELET CONCENTRATES (PC)

1987 ◽  
Author(s):  
A P Bode ◽  
D T Miller ◽  
S Newman
Keyword(s):  
Complement Activation ◽  
Linear Increase ◽  
T Test ◽  
Complement Factor ◽  
Platelet Concentrates ◽  
Significant Difference ◽  
Complement Factor C3 ◽  
Radiolabelled Monoclonal Antibodies ◽  
First Time ◽  
Paired T Test

Platelets are routinely stored for transfusion at room temperature in autologous, citrated plasma. We have demonstrated previously that these conditions do not completely block activation of plasma enzyme systems, as indicated by generation of thrombin activity (Vox Sanguinis, JL1:192,1986). Here, we demonstrate the conversion of large amounts of complement factor C3 during storage of citrated PC by using radioimmunoassay quantitation of the activation peptide C3a des-Arg (Upjohn Diagnostics). Supernatant samples from stored PC and from citrated platelet-poor plasma (PPP) stored under the same conditions showed a rapid linear increase in C3a levels over time with no significant difference (paired t-test, p<0.5) between PC and PPP (see table). The values at Day 10 represent conversion of approximately 11% of the native C3. Possible effects on stored platelets of C3 conversion in the surrounding plasma include:activation of platelets by C3a des-Arg (M.Polley and R. Nachman; J.Exp.Med. 158:603, 1983) and deposition of C3b on the cell surface as "innocent bystanders" (A. Salama and C. Mueller-Eckhardt; Transfusion 25:528,1985).In contrast, <10 ng/mL C5a was found in all samples tested, representing less than 0.2%conversion of C5a.Nephelometricassay of native C5 levels in PC samples showed a slight but significant difference by a paired t-test (p=0.04) between fresh PC (mean=117 ug/mL±12.0, n=6)and P stored for 10 days(nean=108 ug/mL±9.7). Nochange in C5 levels was observed in stored PPP (106 ug/mL to 107 ug/mL). Radiolabelled monoclonal antibodies to C3 fragments showed less than 600 molecules bound per platelet. This study demonstrates for the first time the extent of complement activation in stored platelet concentrates.

scholarly journals Meiofaunal Dynamics and Heterogeneity along Salinity and Trophic Gradients in a Mediterranean Transitional System

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1488 ◽  
Author(s):  
Federica Semprucci ◽  
Maria Flavia Gravina ◽  
Paolo Magni
Keyword(s):  
Habitat Heterogeneity ◽  
Environmental Variability ◽  
Assemblage Structure ◽  
Spatiotemporal Variation ◽  
Transitional Waters ◽  
Study Sites ◽  
Number Of Individuals ◽  
First Time ◽  
Transitional System ◽  
Trophic Gradients

The spatiotemporal variation in meiofaunal assemblages were investigated for the first time in the Cabras Lagoon, the largest transitional system in the Sardinian Island (W-Mediterranean Sea). Two main environmental (salinity and trophic) gradients highlighted a significant separation of the three study sites across the lagoon, which were consistent through time. The environmental variability and habitat heterogeneity of the Cabras Lagoon influenced the meiofauna. In particular, salinity and dissolved oxygen, primarily, shaped the meiofaunal assemblage structure at the seaward site which was significantly different from both the riverine and the organically enriched sites. On the other hand, the trophic components (e.g., organic matter, Chlorophyll-a, and phaeopigments) and the different degrees of confinement and saprobity among sites were the secondary factors contributing mostly to the separation between the latter two sites. The lack of significant differences in the temporal comparison of the meiofaunal assemblage structure along with the very low contribution of temperature to the meiofaunal ordination indicated that this assemblage was more affected by spatial rather than by temporal variation. This pattern was also supported by significant differences between the three sites in several univariate measures, including total number of individuals, number of taxa, Pielou’s evenness, and the ratio between nematodes and copepods. Thus, the present study corroborates the hypothesis that meiofaunal organisms are good indicators of the spatial heterogeneity in transitional waters (TWs) and could have a greater species richness than that expected. Indeed, the Cabras Lagoon overall showed one of the highest meiofaunal richness values found from both Mediterranean and European TWs.

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