Mass produced nematodes Panagrellus redivivus as live food for rearing carp larvae: preliminary results

2004 ◽  
Vol 35 (6) ◽  
pp. 547-551 ◽  
Author(s):  
Christian Schlechtriem ◽  
Manuele Ricci ◽  
Ulfert Focken ◽  
Klaus Becker
Keyword(s):  
Live Food ◽  
Preliminary Results ◽  
Panagrellus Redivivus

scholarly journals The early catfish catches the worm: predation of Corydoras aeneus (Siluriformes, Callichthyidae) on freshwater nematodes

2018 ◽  
Vol 54 ◽  
pp. 29 ◽  
Author(s):  
Nabil Majdi ◽  
Sebastian Weber ◽  
Walter Traunspurger
Keyword(s):  
Nematode Species ◽  
Ornamental Fish ◽  
Live Food ◽  
Daily Consumption ◽  
Freshwater Catfish ◽  
Freshwater Nematodes ◽  
Panagrellus Redivivus ◽  
Wet Weight

In this study, we measured the daily consumption of four different nematode species by a small freshwater catfish species, Corydoras aeneus (Gill, 1858). Consumption of nematodes by fishes was significant with a single C. aeneus individual being able to consume in 24 h between 40 581 and 75 849 adult nematodes depending on the nematode species offered. This represented the ingestion of up to 238 mg wet weight when considering the largest nematode species: Panagrellus redivivus. Our results strengthen the growing evidence of a significant trophic channel existing between meiobenthic invertebrates like nematodes and small bottom-feeding fishes like C. aeneus. We also discuss the relevance of using P. redivivus as live food for rearing C. aeneus which is a popular ornamental fish.

scholarly journals Breeding development of Amazon killifish Anablepsoides sp from Pastaza basin high lands, with Panagrellus redivivus live food, in captivity

2019 ◽  
Author(s):  
Carlos Andrés Silva-Aldas ◽  
Annette Milena Villalta-Gordillo ◽  
Jocelyn Estefanía Arias-Naranjo ◽  
Ricardo Burgos-Morán
Keyword(s):  
Live Food ◽  
Panagrellus Redivivus ◽  
In Captivity

Panagrellus redivivus mass produced on solid media as live food for Litopenaeus vannamei larvae

2006 ◽  
Vol 37 (14) ◽  
pp. 1429-1436 ◽  
Author(s):  
Ulfert Focken ◽  
Christian Schlechtriem ◽  
Matthias von Wuthenau ◽  
Armando García-Ortega ◽  
Ana Puello-Cruz ◽  
...  
Keyword(s):  
Litopenaeus Vannamei ◽  
Live Food ◽  
Solid Media ◽  
Panagrellus Redivivus

Panagrellus redivivus(Linné) as a live food organism in the early rearing of the catfishSynodontis petricola(Matthes)

2007 ◽  
Vol 38 (6) ◽  
pp. 653-659 ◽  
Author(s):  
Jürgen Sautter ◽  
Horst Kaiser ◽  
Ulfert Focken ◽  
Klaus Becker
Keyword(s):  
Live Food ◽  
Food Organism ◽  
Panagrellus Redivivus ◽  
Early Rearing

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Cyclic Evolution of Sunspots: Gleaning New Results from Old Data

2000 ◽  
Vol 179 ◽  
pp. 163-165
Author(s):  
S. K. Solanki ◽  
M. Fligge ◽  
P. Pulkkinen ◽  
P. Hoyng
Keyword(s):  
Sunspot Number ◽  
Sunspot Cycle ◽  
Preliminary Results ◽  
Butterfly Diagram

AbstractThe records of sunspot number, sunspot areas and sunspot locations gathered over the centuries by various observatories are reanalysed with the aim of finding as yet undiscovered connections between the different parameters of the sunspot cycle and the butterfly diagram. Preliminary results of such interrelationships are presented.

Systematic effects in observed parallaxes

1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson
Keyword(s):  
Error Estimates ◽  
Zero Point ◽  
Absolute Zero ◽  
Apparent Magnitude ◽  
Coherent System ◽  
Preliminary Results ◽  
General Catalogue ◽  
Systematic Effects ◽  
New Evidence ◽  
Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

Quantitative Measurements on the Ion Etching of TMV

1973 ◽  
Vol 31 ◽  
pp. 336-337
Author(s):  
Irwin Bendet ◽  
Nabil Rizk
Keyword(s):  
Electron Microscope ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Ion Current ◽  
Beam Diameter ◽  
Ion Etching ◽  
Preliminary Results ◽  
Quantitative Measurements ◽  
Monitoring Devices

Preliminary results reported last year on the ion etching of tobacco mosaic virus indicated that the diameter of the virus decreased more rapidly at 10KV than at 5KV, perhaps reaching a constant value before disappearing completely.In order to follow the effects of ion etching on TMV more quantitatively we have designed and built a second apparatus (Fig. 1), which incorporates monitoring devices for measuring ion current and vacuum as well as accelerating voltage. In addition, the beam diameter has been increased to approximately 1 cm., so that ten electron microscope grids can be exposed to the beam simultaneously.

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