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 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.

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

Monitoring feeding behaviour of brent geese Branta bernicla using position-sensitive radio transmitters

2001 ◽  
Vol 7 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Mark Hassall ◽  
Simon J. Lane ◽  
Martin Stock ◽  
Steve M. Percival ◽  
Barbara Pohl
Keyword(s):  
Feeding Behaviour ◽  
Branta Bernicla ◽  
Radio Transmitters ◽  
Position Sensitive
Sign in / Sign up

Export Citation Format

Share Document