scholarly journals Selective feeding behaviour of key free-living protists: avenues for continued study

2008 ◽  
Vol 53 ◽  
pp. 83-98 ◽  
Author(s):  
DJS Montagnes ◽  
AB Barbosa ◽  
J Boenigk ◽  
K Davidson ◽  
K Jürgens ◽  
...  
Keyword(s):  
Feeding Behaviour ◽  
Selective Feeding ◽  
Free Living

Selective feeding behaviour of Gambusia affinis

Oecologia ◽  
1972 ◽  
Vol 11 (1) ◽  
pp. 79-81 ◽  
Author(s):  
P. T. Rajasekharan ◽  
B. N. Chowdaiah
Keyword(s):  
Feeding Behaviour ◽  
Gambusia Affinis ◽  
Selective Feeding

scholarly journals Cytokinin-mediated leaf manipulation by a leafminer caterpillar

2007 ◽  
Vol 3 (3) ◽  
pp. 340-343 ◽  
Author(s):  
David Giron ◽  
Wilfried Kaiser ◽  
Nadine Imbault ◽  
Jérôme Casas
Keyword(s):  
Plant Physiology ◽  
Feeding Behaviour ◽  
Adaptive Significance ◽  
Plant Defences ◽  
Selective Feeding ◽  
Feeding Mode ◽  
Leaf Mining ◽  
Galling Insects ◽  
Nutritional Benefits

A large number of hypotheses have been proposed to explain the adaptive significance and evolution of the endophagous-feeding mode, nutritional benefits being considered to be one of the main advantages. Leaf-mining insects should feed on most nutritional tissues and avoid tissues with high structural and/or biochemical plant defences. This selective feeding behaviour could furthermore be reinforced by manipulating the plant physiology, as suggested by the autumnal formation of ‘green islands’ around mining caterpillars in yellow leaves. The question we address here is how such metabolic manipulation occurs and what the nutritional consequences for the insect are. We report a large accumulation of cytokinins in the mined tissues which is responsible for the preservation of functional nutrient-rich green tissues at a time when leaves are otherwise turning yellow. The analogy with other plant manipulating organisms, in particular galling insects, is striking.

scholarly journals Traffic noise playback reduces the activity and feeding behaviour of free-living bats

2020 ◽  
Vol 263 ◽  
pp. 114405 ◽  
Author(s):  
Domhnall Finch ◽  
Henry Schofield ◽  
Fiona Mathews
Keyword(s):  
Feeding Behaviour ◽  
Traffic Noise ◽  
Free Living

Two new Pseudoceros (Polycladida: Pseudocerotidae) and a Prostheceraeus (Polycladida: Euryleptidae) from Andaman and Nicobar Islands, India

Zootaxa ◽  
2017 ◽  
Vol 4269 (4) ◽  
pp. 495
Author(s):  
SUDHANSHU DIXIT ◽  
C. RAGHUNATHAN ◽  
KAILASH CHANDRA
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Feeding Behaviour ◽  
Dorsal Surface ◽  
The Body ◽  
Andaman And Nicobar Islands ◽  
Free Living ◽  
Indian Context ◽  
Nicobar Islands ◽  
Three New Species

Polyclads are free-living marine flatworms known for their striking colour and patterns. These animals though frequently encountered are still understudied in the Indian context. The present paper describes three new species, two belonging to the genus Pseudoceros Lang, 1884 and one to the genus Prostheceraeus Schmarda, 1859. Pseudoceros auranticrinis sp. nov. is characterised by whitish cream background colour, brown mottling with numerous white and dark brown spots all over the body except margins and a smooth dorsal surface with orange pseudotentacles, Pseudoceros vishnui sp. nov. is characterised by having purple to violet spots on dorsum with margin made up of blue spots, while Prostheceraeus fuscolineatus sp. nov. is characterised by presence of brown longitudinal lines on dorsum and black erected tentacles. This is the first description of any species under the genus Prostheceraeus from central Indo-Pacific as well as Indian Ocean. Some insights on feeding behaviour of P. vishnui sp. nov. are also provided.

scholarly journals Selective Feeding and Microalgal Consumption Rates by Crown-of-Thorns Seastar (Acanthaster cf. solaris) Larvae

2016 ◽  
Author(s):  
Camille Mellin ◽  
Claire Lugrin ◽  
Ken Okaji ◽  
David S. Francis ◽  
Sven Uthicke
Keyword(s):  
Feeding Behaviour ◽  
Energy Content ◽  
Algal Species ◽  
Larval Survival ◽  
Larval Feeding ◽  
Selective Feeding ◽  
Feeding Experiments ◽  
Cell Counts ◽  
Phytoplankton Communities ◽  
Spatio Temporal

Outbreaks of the crown-of-thorns seastar (CoTS) represent a major cause of coral loss on the Great Barrier Reef. Outbreaks might be explained by enhanced larval survival supported by higher phytoplankton availability after flood events, yet little is known about CoTS larvae feeding behaviour, in particular their potential for selective feeding. Here, single- and mixed-species feeding experiments were conducted on CoTS bipinnaria larvae using five algae (Phaeodactylum tricornutum, Pavlova lutheri, Tisochrysis lutea , Dunaliella sp. and Chaetoceros sp.) and two algal concentrations (1000 and 2500 algae mL-1). Cell counts using flow-cytometry at the beginning and end of each incubation experiment allowed us to calculate the filtration and ingestion rates of each species by CoTS larvae. In line with previous studies, CoTS larvae ingested more algae when initial algal concentration was higher. We found evidence for the selective ingestion of some species (Chaetoceros sp., Dunaliella sp.) over others (P. lutheri, P. tricornutum). The preferred algal species had the highest energy content, suggesting that CoTS selectively ingested the most energetic algae. Ultimately, combining these results with spatio-temporal patterns in phytoplankton communities will help elucidate the role of larval feeding behaviour in determining the frequency and magnitude of CoTS outbreaks.

DOES TESTOSTERONE AFFECT THE TRADE-OFF BETWEEN INVESTMENT IN SEXUAL/TERRITORIAL BEHAVIOUR AND PARENTAL CARE IN MALE GREAT TITS?

Behaviour ◽  
2000 ◽  
Vol 137 (11) ◽  
pp. 1503-1515 ◽  
Author(s):  
Els Van Duyse ◽  
Marcel Eens ◽  
Rianne Pinxten
Keyword(s):  
Feeding Behaviour ◽  
Paternal Care ◽  
Parus Major ◽  
Great Tit ◽  
Male Fitness ◽  
Short Term ◽  
Free Living ◽  
Male And Female ◽  
Trade Off ◽  
Competitive Behaviour

AbstractBreeding testosterone (T) profiles of free-living male birds are hypothesized to reflect a trade-off between investment in competitive behaviour for mates or territories, typically accompanied by high T-levels, and investment in paternal care, typically accompanied by low T-levels. To test this hypothesis we monitored song activity, as a measure of territorial advertisement or mate attraction, and feeding efforts, as a measure of paternal care, in great tit Parus major males that either received T-filled or empty implants in the middle of the feeding phase, a period of high paternal commitment and low T-levels. In support of the trade-off hypothesis, T-implanted males sang significantly more than controls. However, we found no significant effect of the elevated T-levels on male and female feeding behaviour despite the large increase in T following implantation. Also, no short-term effects on male fitness were found. Taken together these results do not support the trade-off hypothesis. We discuss that the low overall responsiveness in our study might be related to a high fitness cost of neglecting offspring in favour of T-enhanced behaviour.

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