Winter–spring feeding and metabolism of Arctic copepods: insights from faecal pellet production and respiration measurements in the southeastern Beaufort Sea

Polar Biology ◽  
2006 ◽  
Vol 30 (4) ◽  
pp. 427-436 ◽  
Author(s):  
Lena Seuthe ◽  
Gérald Darnis ◽  
Christian Wexels Riser ◽  
Paul Wassmann ◽  
Louis Fortier
Keyword(s):  
Beaufort Sea ◽  
Faecal Pellet ◽  
Pellet Production ◽  
Faecal Pellet Production

Quantitative evaluation of the feeding of the carmine spider mite Tetranychus cinnabarinus (Boisd.) (Acari, Tetranychidae)

1975 ◽  
Vol 65 (3) ◽  
pp. 515-521 ◽  
Author(s):  
A. Hazan ◽  
U. Gerson ◽  
A. S. Tahori
Keyword(s):  
Quantitative Evaluation ◽  
Spider Mite ◽  
Continuous Light ◽  
Faecal Pellet ◽  
Tetranychus Cinnabarinus ◽  
Optimal Conditions ◽  
Pellet Production ◽  
Faecal Pellet Production ◽  
Different Temperatures ◽  
Carmine Spider Mite

AbstractFaecal pellet production by Tetranychus cinnabarinus (Boisd.) was recorded at different temperatures (19, 24, 30, 35°C) and relative humidities (0% to 100%); at all temperatures pellet production was greater under dry than under wet conditions. A feeding index based on faecal pellet production and the proportion of adults surviving each day showed that the optimal conditions for the mite were 24°C and 38% r.h. Pellet production increased under continuous light and, under any particular set of conditions, was closely correlated with the numbers of eggs laid. It is concluded that faecal pellet production can be used as a measure of feeding within a given set of conditions provided it is supplemented and checked by other data.

Export or retention? Copepod abundance, faecal pellet production and vertical flux in the marginal ice zone through snap shots from the northern Barents Sea

Polar Biology ◽  
2006 ◽  
Vol 30 (6) ◽  
pp. 719-730 ◽  
Author(s):  
Christian Wexels Riser ◽  
Marit Reigstad ◽  
Paul Wassmann ◽  
Elena Arashkevich ◽  
Stig Falk-Petersen
Keyword(s):  
Barents Sea ◽  
Faecal Pellet ◽  
Vertical Flux ◽  
Pellet Production ◽  
Copepod Abundance ◽  
Faecal Pellet Production ◽  
Marginal Ice Zone

The Filter-Feeding of Artemia

1963 ◽  
Vol 40 (1) ◽  
pp. 215-221
Author(s):  
M. R. REEVE
Keyword(s):  
Faecal Pellet ◽  
Filter Feeding ◽  
Size And Shape ◽  
Pellet Production ◽  
Faecal Pellet Production ◽  
Food Particles ◽  
Animal Size

1. The effects of animal size and of type and concentration of food particles upon the rate of faecal pellet production in Artemia have been investigated. 2. The rate of pellet production in starved animals, and the relation between the nature of ingested particles and the size and shape of the pellet, have been determined. 3. Chitinous membranes enclose the pellets. The origin of these membranes from the gut wall has been studied. 4. The possible function of these membranes in relation to the passage of food through the gut is discussed.

Laboratory screening of tropical hardwoods for natural resistance to the marine borer Limnoria quadripunctata: The role of leachable and non-leachable factors

Holzforschung ◽  
2008 ◽  
Vol 62 (1) ◽  
pp. 99-111 ◽  
Author(s):  
Luisa M.S. Borges ◽  
Simon M. Cragg ◽  
Julien Bergot ◽  
John R. Williams ◽  
Ben Shayler ◽  
...  
Keyword(s):  
High Mortality ◽  
Faecal Pellet ◽  
Water Soluble ◽  
Natural Resistance ◽  
Feeding Rates ◽  
Faecal Pellets ◽  
Pellet Production ◽  
Faecal Pellet Production ◽  
Bruguiera Gymnorhiza

AbstractThe marine borerLimnoriaingests essential wood components including the extractives the wood contains. Some extractives may confer borer resistance on certain timbers. Feeding byLimnoriacorrelates with the rate of production of faecal pellets. The faecal pellet production rate and mortality on over 40 test timbers and non-resistantPinus sylvestrissapwood was measured over 15 days. By placing animals in leachate from wood and with wood in flowing seawater, the effects of leaching-resistant and water-soluble compounds were measured. Some previously untested timbers affectedLimnoriaas strongly as timbers reputed for durability in marine construction. Wood ofMinquartia guianensis,Nectandra rubraandBruguiera gymnorhizacaused high mortality, and pellet production on them was less than 10% of production onP. sylvestris. Suppressed feeding rates, but with no heavy mortality, were observed on known durable species such asChlorocardium rodiei,Dicorynia guianensis, Lophira alataandNauclea trillesii, but also onCynometra ananta,Distemonanthus benthamianus,Enterolobium schomburgkii,Goupia glabra,Hymenaea courabil,Mammea africana,Shoreasp. andSacoglottis guianensis. Leachate fromB. gymnorhiza,G. glabra,H. coubaril,N. rubraandShoreasp. caused high mortality. These short-term bioassays thus detected clear differences between wood species in their resistance toLimnoriathat matched findings from long-term marine trials, while indicating new species worthy of detailed testing.

Sign in / Sign up

Export Citation Format

Share Document