ABNORMALITIES IN SECOND-STAGE LARVAE OF HETERODERA TRIFOLII GOFFART, 1932 (NEMATODA:HETERODERIDAE)

1960 ◽  
Vol 38 (4) ◽  
pp. 777-779
Author(s):  
Roland H. Mulvey
Keyword(s):  
Sugar Beet ◽  
Body Length ◽  
Second Generation ◽  
Chromosome Complement ◽  
Mixed Population ◽  
Second Stage ◽  
Tail Development ◽  
Different Types ◽  
Average Body Length ◽  
Average Body

Second-generation females of a cyst-forming nematode, Heterodera trifolii Goffart, 1932, from a mixed population of this species and the sugar-beet nematode, H. schachtii Schmidt, 1871, produced small, normal, giant, and abnormal second-stage larvae. The giant larvae averaged 670 μ in length, while the small larvae had an average body length of 404 μ. Abnormalities in the larvae occurred mostly in the tail development. It is suggested that the sperm of H. schachtii may have affected the normal chromosome complement of the H. trifolii oöcytes during oögenesis and was thereby responsible for the production of the different types of larvae recorded.

A Method of Calculating Body Lengths from Otolith Measurements for Pacific Halibut and its Application to Portlock-Albatross Grounds Data between 1935 and 1957

1962 ◽  
Vol 19 (2) ◽  
pp. 339-362 ◽  
Author(s):  
G. Morris Southward
Keyword(s):  
Growth Rate ◽  
Body Length ◽  
Average Length ◽  
Growth Patterns ◽  
Commercial Fishery ◽  
Young Fish ◽  
Pacific Halibut ◽  
Average Body Length ◽  
Average Body

A change in growth rate of the halibut from the Portlock-Albatross grounds has occurred since the early 1930's. It is possible to measure this change in growth by studying the otoliths of fish taken by the commercial fishery in subsequent years. The calculation of body lengths from otolith measurements has provided a technique of reconstructing the growth patterns of each year-class. This method has been tested using the otoliths of recovered tagged halibut. The percentage deviations from average body length at each age demonstrate an increase in average length with time over the period 1920–1956. This increase is not exhibited among young fish of ages 1 through 4; it starts approximately with age 5 and continues throughout the older ages, where it is pronounced.

scholarly journals SOME DATA ON BIOLOGY AND FISHERY OF ICEFISH SALANGICHTHYS MICRODON IN PETER THE GREAT BAY (JAPAN SEA)

2019 ◽  
Vol 196 ◽  
pp. 90-100
Author(s):  
L. N. Kim
Keyword(s):  
Body Length ◽  
Peter The Great Bay ◽  
Japan Sea ◽  
The Body ◽  
Spawning Period ◽  
Amur Bay ◽  
Peter The Great ◽  
Great Bay ◽  
Average Body Length ◽  
Average Body

Within Peter the Great Bay, common icefish Salangichthys microdon forms commercially valuable aggregations in two areas of the Amur Bay and in one area of the Ussuri Bay. It spawns in the internal estuaries of the rivers entered to the bays and in the external estuarine zones in the tops of the bays, mostly on small pebble grounds from late April to late May and feeds in the bays waters. Data on its size and weight composition were obtained in 2017–2018 both from the Amur Bay (for spawning period) and from the Ussuri Bay (for feeding period). During the spawning (on May 6 and May 18), the body length was 59–90 mm, on average 74.9 mm, and the weight was about 750 mg; sex ratio males : females was 1.0 : 0.8. During the feeding, the average body length was 66.8 mm.

Godzilliognomus schrami, a new species of Remipedia (Crustacea) from Eleuthera, Bahamas

Zootaxa ◽  
2010 ◽  
Vol 2491 (1) ◽  
pp. 61 ◽  
Author(s):  
THOMAS M. ILIFFE ◽  
TINA OTTEN ◽  
STEFAN KOENEMANN
Keyword(s):  
New Species ◽  
Body Length ◽  
The Other ◽  
Average Body Length ◽  
A New Species ◽  
Average Body

Godzilliognomus schrami, a new species of the crustacean class Remipedia, Yager, 1981 is the second species assigned to the genus. The new species, with an average body length of 6.8 mm, was collected from an anchialine cave on the Bahamian island of Eleuthera. Godzilliognomus schrami can be distinguished from the other species in the genus, Godzilliognomus frondosus Yager, 1989 by narrower and less trapezoidal tergites, frontal filaments that differ regarding the shape and insertion of the medial process, and dorsal antennular rami composed of only ten segments.

scholarly journals Tingkat keragaman ukuran benih ikan lele Clarias sp. yang diberi Artemia dengan periode yang berbeda

2016 ◽  
Vol 15 (2) ◽  
pp. 156
Author(s):  
Dedi Jusadi ◽  
Farida Fitriani ◽  
Julie Ekasari ◽  
Apriana Vinasyiam
Keyword(s):  
Survival Rate ◽  
Growth Performance ◽  
Size Distribution ◽  
Body Length ◽  
Size Variation ◽  
Culture Period ◽  
Medium Size ◽  
Feeding Period ◽  
Average Body Length ◽  
Average Body

<p class="NoParagraphStyle"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">This research was conducted to evaluate the effect of different <em>Artemia</em> feeding period on the size variation of catfish <em>Clarias</em> sp. larvae. One thousand two days post hatched larvae with an average body length of 0.7±0.03 cm were randomly distributed into 25 L round plastic tanks. The treatment conducted for 13 days with four treatment; without<em> Artemia</em>, given <em>Artemia</em> 1, 2, or 3 days in the first culture period. The results showed that 15 days old fish has the same survival rate in all treatments; and has two size distribution i.e. the small size (S) and medium size (M). Increasingly the period of administration of <em>Artemia</em>, the percentage of the amount of M-size fish increases, thereby giving <em>Artemia</em> were able to increase growth of larvae. Feeding catfish with <em>Artemia</em> for two days has shown producing better growth.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: catfish, <em>Artemia</em>, size variation, growth performance</p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong>ABSTRAK</strong></p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Penelitian ini dilakukan untuk mengevaluasi pengaruh perbedaan periode pemberian pakan <em>Artemia </em>terhadap kinerja pertumbuhan larva ikan lele <em>Clarias </em>sp. Seribu ekor larva lele yang berumur dua hari dengan panjang rata-rata 0,7±0,03 cm ditebar dalam wadah dengan volume air 25 L. Budidaya ikan dilakukan selama 13 hari dengan empat perlakuan, yaitu perlakuan tanpa pemberian <em>Artemia</em>, pemberian <em>Artemia</em> selama satu, dua, atau tiga hari di awal masa budidaya. Hasil penelitian menunjukkan bahwa ikan umur 15 hari memiliki sintasan yang sama di semua perlakuan, serta memiliki dua sebaran ukuran, yakni ukuran kecil (S) dan ukuran sedang (M). Semakin lama periode pemberian <em>Artemia</em>, persentase jumlah ikan ukuran M meningkat, sehingga pemberian <em>Artemia</em> pada larva ikan lele mampu meningkatkan pertumbuhan. Pemberian <em>Artemia</em> selama dua hari memberikan pertumbuhan yang lebih baik.</p><p class="NoParagraphStyle"> </p><p>Kata kunci: ikan lele, <em>Artemia</em>, keragaman ukuran, kinerja pertumbuhan</p>

Morphometric and carcass characteristics of Jaunpuri breed of goats

2017 ◽  
Vol 36 (02) ◽  
Author(s):  
Dharmendra Kumar ◽  
V. K. Singh ◽  
Alok Kumar Yadav ◽  
Amit Kumar Jha ◽  
Jitendra Singh
Keyword(s):  
Body Length ◽  
Age Groups ◽  
Uttar Pradesh ◽  
Carcass Characteristics ◽  
Mean Value ◽  
Average Height ◽  
Body Weights ◽  
The Mean ◽  
Average Body Length ◽  
Average Body

The present study was undertaken to observe morphometric and carcass characteristics of Jaunpuri goat. The survey plan was conducted in two districts viz. Allahabad and Jaunpur of its native tracts in Uttar Pradesh. The overall average body weights of male goats of the age groups 0-3, 3-6, 6-9, 9-12 and above12 months were observed as 5.50±0.327, 12.07±0.598, 19.62±0.738, 21.92±0.571 and 30.44±0.978 kg respectively. The overall average body length of male goats of the age groups 0-3, 3-6, 6-9, 9-12, and above 12 months were observed as 38.63±1.762, 48.55±2.090, 58.77±0.652, 67.23±0.777 and 67.56±0.747 cm. The overall average height of male goats of the age groups 0-3, 3-6, 6-9, 9-12 and above 12 months were observed as 41.63±1.945, 53.36±2.094, 66.23±1.051, 72.69±0.664 and 72.31±0.893 cm, respectively. The corresponding values for females were 44.24±0.825, 50.38±0.836, 62.81±0.466, 69.14±0.387 and 69.00±0.691 cm. The mean value of horn size of male goats of the age groups 0-3, 3-6, 6-9, 9-12 and above 12 months were observed as 1.94±0.346, 2.73±0.449, 5.54±0.584,5.85±0.696 and 7.56±0.381 cm respectively. The respective averages for females were 1.77±0.171, 2.60±0.173, 4.94±0.322, 6.53±0.424 and 6.79±0.421 cm. The results revealed no significant differences in average slaughter weight between the sexes of the same age groups but it varied significantly (P less than 0.05) in different age groups like 6, 9 and 12 month of age.

An Enhanced Two Stage MMSE Equalizer for Coded FBMC/OQAM Systems

2019 ◽  
Vol 10 (1) ◽  
pp. 69-82 ◽  
Author(s):  
Mohammad Rizk Assaf ◽  
Abdel-Nasser Assimi
Keyword(s):  
Error Propagation ◽  
Channel Model ◽  
Error Correcting Codes ◽  
Two Stage ◽  
Probability Of Error ◽  
Second Stage ◽  
Different Types ◽  
Mmse Equalizer ◽  
And Performance ◽  
Ici Cancellation

In this article, the authors investigate the enhanced two stage MMSE (TS-MMSE) equalizer in bit-interleaved coded FBMC/OQAM system which gives a tradeoff between complexity and performance, since error correcting codes limits error propagation, so this allows the equalizer to remove not only ICI but also ISI in the second stage. The proposed equalizer has shown less design complexity compared to the other MMSE equalizers. The obtained results show that the probability of error is improved where SNR gain reaches 2 dB measured at BER compared with ICI cancellation for different types of modulation schemes and ITU Vehicular B channel model. Some simulation results are provided to illustrate the effectiveness of the proposed equalizer.

A novel two-stage method of plant seedlings classification based on deep learning

2021 ◽  
pp. 1-11
Author(s):  
Tianhong Dai ◽  
Shijie Cong ◽  
Jianping Huang ◽  
Yanwen Zhang ◽  
Xinwang Huang ◽  
...  
Keyword(s):  
Deep Learning ◽  
Learning Technology ◽  
Two Stage ◽  
Second Stage ◽  
Stage Classification ◽  
Different Types ◽  
Two Stages ◽  
Plant Seedlings

In agricultural production, weed removal is an important part of crop cultivation, but inevitably, other plants compete with crops for nutrients. Only by identifying and removing weeds can the quality of the harvest be guaranteed. Therefore, the distinction between weeds and crops is particularly important. Recently, deep learning technology has also been applied to the field of botany, and achieved good results. Convolutional neural networks are widely used in deep learning because of their excellent classification effects. The purpose of this article is to find a new method of plant seedling classification. This method includes two stages: image segmentation and image classification. The first stage is to use the improved U-Net to segment the dataset, and the second stage is to use six classification networks to classify the seedlings of the segmented dataset. The dataset used for the experiment contained 12 different types of plants, namely, 3 crops and 9 weeds. The model was evaluated by the multi-class statistical analysis of accuracy, recall, precision, and F1-score. The results show that the two-stage classification method combining the improved U-Net segmentation network and the classification network was more conducive to the classification of plant seedlings, and the classification accuracy reaches 97.7%.

Ontology Engineering for Gastric Dystemperament in Persian Medicine

2021 ◽  
Author(s):  
Hassan Shojaee-Mend ◽  
Haleh Ayatollahi ◽  
Azam Abdolahadi
Keyword(s):  
Literature Review ◽  
Delphi Study ◽  
Evaluation Study ◽  
Mixed Methods Study ◽  
Case Based Reasoning ◽  
Second Stage ◽  
New Concepts ◽  
Persian Medicine ◽  
Different Types ◽  
Specification Document

Abstract Objective Developing an ontology can help collecting and sharing information in traditional medicine including Persian medicine in a well-defined format. The present study aimed to develop an ontology for gastric dystemperament in the Persian medicine. Methods This was a mixed-methods study conducted in 2019. The first stage was related to providing an ontology requirements specification document. In the second stage, important terms, concepts, and their relationships were identified via literature review and expert panels. Then, the results derived from the second stage were refined and validated using the Delphi method in three rounds. Finally, in the fourth stage, the ontology was evaluated in terms of consistency and coherence. Results In this study, 241 concepts related to different types of gastric dystemperament, diagnostic criteria, and treatments in the Persian medicine were identified through literature review and expert panels, and 12 new concepts were suggested during the Delphi study. In total, after performing three rounds of the Delphi study, 233 concepts were identified. Finally, an ontology was developed with 71 classes, and the results of the evaluation study revealed that the ontology was consistent and coherent. Conclusion In this study, an ontology was created for gastric dystemperament in the Persian medicine. This ontology can be used for designing future systems, such as case-based reasoning and expert systems. Moreover, the use of other evaluation methods is suggested to construct a more complete and precise ontology.

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