scholarly journals Prey size selection, grazing and growth response of the small heterotrophic dinoflagellate Gymnodinium sp. and the ciliate Balanion comatum--a comparative study

1997 ◽  
Vol 158 ◽  
pp. 75-86 ◽  
Author(s):  
HH Jakobsen ◽  
PJ Hansen
Keyword(s):  
Comparative Study ◽  
Growth Response ◽  
Prey Size ◽  
Heterotrophic Dinoflagellate ◽  
Size Selection

Does prey abundance affect prey size selection by the Eagle Owl (Bubo bubo)?

2021 ◽  
Author(s):  
Jorge Tobajas ◽  
Carlos Rouco ◽  
Javier Fernandez-de-Simon ◽  
Francisco Díaz-Ruiz ◽  
Francisca Castro ◽  
...  
Keyword(s):  
Prey Size ◽  
Prey Abundance ◽  
Bubo Bubo ◽  
Size Selection ◽  
Eagle Owl

scholarly journals Prey-size selection by freshwater flagellated protozoa

1990 ◽  
Vol 35 (7) ◽  
pp. 1429-1436 ◽  
Author(s):  
Thomas H. Chrzanowski ◽  
Karel Šimek
Keyword(s):  
Prey Size ◽  
Size Selection

scholarly journals Comparative study on meristem culture of three potato cultivars diamant, cardinal and granula and their shoot formation

2016 ◽  
Vol 1 (3) ◽  
pp. 537-544
Author(s):  
Marufa Khatun ◽  
Md Shahadat Hossain ◽  
Md Khalekuzzan ◽  
Amina Rownaq
Keyword(s):  
Comparative Study ◽  
Growth Response ◽  
Potato Cultivar ◽  
Shoot Formation ◽  
Shoot Tips ◽  
Potato Cultivars ◽  
Meristem Culture ◽  
Ms Medium ◽  
Surface Sterilization ◽  
Apical Meristems

The main aim of this study was to analyze the comparative study on meristem culture of three important potato cultivars, diamant, cardinal and granula and their shoot formation using meristem tips. Apical meristems were isolated from shoot tips of 25-35 days old field grown plants. After surface sterilization the meristems (0.3 mm) were isolated from the shoot tips. After isolation the apical meristems were placed quickly on “M” shaped filter paper bridge in culture tubes containing liquid MS medium supplemented with various concentrations and combinations of different plant growth regulators. Meristems showed their first growth response by increase in size and became greenish white in colour. They continued their growth and developed shoots with roots. In the present investigation, among the three cultivars of potato, cardinal were the best responsive cultivars for the resuming new growth of cultured meristems on MS medium supplemented with KIN (0.4 mg l-1) + GA3 (0.5 mg l-1). Cultivar diamant showed comparatively better growth response in the primary culture and granula showed better results in shoot length formation in MS0 medium. Cultivar cardinal proved to be best potato cultivar in case of meristem culture than diamant and granula cultivars.Asian J. Med. Biol. Res. December 2015, 1(3): 537-544

Frequency-dependent prey selection by larvae of Toxorhynchites splendens (Diptera: Culicidae)

1996 ◽  
Vol 86 (6) ◽  
pp. 633-639 ◽  
Author(s):  
D. Dominic Amalraj ◽  
P. K. Das
Keyword(s):  
Aedes Aegypti ◽  
Foraging Behaviour ◽  
Anopheles Stephensi ◽  
Prey Size ◽  
Prey Selection ◽  
Fourth Instar ◽  
Frequency Dependent ◽  
Size Selection ◽  
The Stability

AbstractThe foraging behaviour of frequency-dependent prey selection by larval instars of Toxorhynchites splendens (Wiedemann) was studied in the laboratory. Prey size selection (second vs fourth instars of Aedes aegypti Linnaeus or Anopheles stephensi Liston) by third and fourth instar predators was frequency-dependent. However, in the case of second instar predators, prey size selection was not frequency-dependent and the predator preferred second instar to fourth instar prey. When offered second instars of Aedes aegypti and Anopheles stephensi the preference for one species over the other was frequency-dependent in all the three predator instars. The role of frequency-dependent prey selection in the stability of prey—predator interaction at low equilibrium levels is discussed.

Prey selection by harbour seals, Phoca vitulina, in relation to variations in prey abundance

1997 ◽  
Vol 75 (9) ◽  
pp. 1508-1518 ◽  
Author(s):  
Dominic J. Tollit ◽  
Paul M. Thompson ◽  
Simon P. R. Greenstreet
Keyword(s):  
Diet Composition ◽  
Prey Size ◽  
Prey Selection ◽  
Phoca Vitulina ◽  
Correction Factors ◽  
Fish Prey ◽  
Size Selection ◽  
Harbour Seals ◽  
Moray Firth ◽  
Time Periods

This study compared the composition of the diet of harbour seals (Phoca vitulina) feeding in the Moray Firth, Scotland, with the abundance of their fish prey estimated from dedicated fishery surveys in January 1992 and 1994 and June 1992. Prey-size selection was also examined in these three time periods and in January 1991. In each period, the most abundant fish species contributed most to the diet. However, the relative abundances of the remaining species in the sea showed little similarity to their contribution to the seals' diet. Diet composition was almost totally dominated by either pelagic species or species dwelling on or strongly associated with the seabed, depending upon the relative abundance of pelagic schooling prey. Most fish consumed were 10–16 cm in length, although larger cod and herring were taken. With the exception of cod, the extent of size selection was dependent upon the use of correction factors that accounted for otolith erosion due to digestion.

Prey Size Selection by Red Knot Feeding on Mud Snails at Punta Rasa (Argentina) During Migration

Waterbirds ◽  
2004 ◽  
Vol 27 (4) ◽  
pp. 493-498 ◽  
Author(s):  
Elena Ieno ◽  
Daniela Alemany ◽  
Daniel E. Blanco ◽  
Ricardo Bastida
Keyword(s):  
Prey Size ◽  
Size Selection ◽  
Red Knot

The Effects of Prey Size Selection by Lake Planktivores

1968 ◽  
Vol 17 (3) ◽  
pp. 273-291 ◽  
Author(s):  
L. J. Brooks
Keyword(s):  
Prey Size ◽  
Size Selection
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