Results 231 to 240 of about 26,013 (270)

Is diel dualism in feeding activity influenced by competition between individuals?

Canadian Journal of Zoology, 1997
The feeding activity of eight groups of 15 rainbow trout (Oncorhynchus mykiss) each was recorded using self-feeders combined with passive integrated transponder (PIT) tag registrations. The diel pattern for all individuals was established by analysing the PIT-tag registrations.
Eva Brännäs, Anders Alanärä
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Diel Activity and Feeding of Schooled Largemouth Bass Fry

Transactions of the American Fisheries Society, 1976
Abstract A school of largemouth bass (Micropterus salmoides) fry was observed and a sample of fry collected for stomach content analysis at 3-hour intervals throughout a 24-hour period. During most of the day, the location of the school changed little, and the fry fed continuously on limnetic zooplankters.
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Diel feeding behavior in larvae of four odonate species

Journal of Insect Behavior, 1993
The diel feeding behavior of four coexisting odonate larvae, Aeshna juncea, Coenagrion hastulatum, Cordulia aenea,and Leucorrhinia dubiawas studied in the laboratory. C. hastulatumand L. dubiawere equally active during day and night. While C. hastulatumconsumed an equal number of prey during day and night, L. dubiaconsumed more prey during night.
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Diel rhythms of feeding activity in the European catfish, Silurus glanis

Physiology & Behavior, 1995
The diel rhythms of feeding activity of S. glanis held singly or in groups, and with free or time-restricted access to self-feeders is described. It was found that this this species has a strongly nocturnal feeding activity. European catfish can be trained to feed itself by day, but in such case its voluntary feed intake is reduced.
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Prey selection and diel feeding of the freshwater jellyfish, Craspedacusta sowerbyi

Freshwater Biology, 1999
Summary1. The diet of the invasive freshwater jellyfish, Craspedacusta sowerbyi (Lankester), was assessed by analysing its stomach contents.2. The medusae ingested various zooplankton and benthic prey in the 0.1–3.0 mm size range. The selectivity indices for prey showed that larger zooplankton (0.4–1.4 mm) and active prey such as copepods were ...
Reinhard Spadinger, Gerhard Maier
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Diel feeding pattern and prey selection of mesozooplankton on microplankton community

Journal of Experimental Marine Biology and Ecology, 2010
Mesozooplankton play an important role in transporting energy from microphytoplankton and microzooplankton to higher trophic levels. However there were few studies on the diel feeding patterns and prey selectivity of mesozooplankton. We conducted feeding experiments of mesozooplankton in the East China Sea to determine their respective diel feeding ...
Wu, Chih-Jung, Chiang, Kuo-Ping, Liu, Hongbin   +2 more
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Feeding activity of ducks in relation to diel emergence of chironomids

Canadian Journal of Zoology, 1982
The diel emergence of chironomids, an insect group important as food item for both adult and young ducks, was studied in relation to the feeding activity and behaviour of ducks on a northern Swedish lake (66°3′ N, 23°46′ E) during 1975–1978. Emergence and swarming activity of chironomids peaked between 0800 and 1200.
Kjell Sjöberg, Kjell Danell
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Diel vertical migration and feeding by krill Meganyctiphanes norvegica

2004
Merged with duplicate record 10026.1/728 on 08.20.2017 by CS (TIS)
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Demand‐feeding behaviour and diel pattern of feeding activity in Oncorhynchus mykiss held under different photoperiod regimes

Journal of Fish Biology, 1992
Demand‐feeding behaviour was studied inOncorhynchus mykissheld at 7–10°C in groups of 30 individuals, under a 16:8, 12:12 or 8 : 16 light : dark regime, using self‐feeders connected to a computer. The daily food demand was variable between tanks from 1.5 to 5% of the body weight, the specific growth rate ranged between 1.4 and 2.6% of body weight ...
T. Boujard, J. F. Leatherland
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Circadian Rhythms of Feeding Activity in Sea Bass, Dicentrarchus labrax L.: Dual Phasing Capacity of Diel Demand-Feeding Pattern

Journal of Biological Rhythms, 1995
The nocturnal versus diurnal feeding patterns of sea bass under controlled experimental conditions were studied in order to investigate the existence of such a dualistic feeding behavior. The animals (six groups of 4 animals and 8 single fish) were held in tanks filled with recirculating salt water and installed in a "chronolab" under constant ...
F J, Sánchez-Vázquez, J A, Madrid, S, Zamora   +2 more
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