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The advantage of juvenile coloration in reef fishesMahon, Jeffrey L 12 1900 (has links)
Juvenile reef fishes often have a color pattern different from that of adults. It
has been theorized that this reduces the aggression received by juveniles from adult
conspecifics. This was tested using two species of Labroides cleaning wrasses in which
certain-sized individuals can quickly shift back and forth between the adult and juvenile
color patterns. Adult Labroides phthirophagus has the same single-male grouping
social structure as previously described for L. dimidiatus. Small L. phthirophagus and
L. dimidiatus in juvenile coloration shifted to adult coloration when isolated and then
quickly shifted back to juvenile coloration when chased by an adult conspecific female.
In L. phthirophagus the adult females attacked small cleaners more frequently when
they displayed the adult color pattern, indicating that juvenile coloration gives some
protection from conspecific aggression. Two other species oflabrids, Thalassoma
duperrey and Coris gaimard, showed the ability to shift back to juvenile coloration
when aggression was received from con specific adults, although the shift was not nearly
as rapid as seen in Labroides species.
Dascyllus albisella and Zebrasomajlavescens, common reef fishes, preferred to
solicit cleaning (by posing) from the adult-colored L. phthirophagus, indicating that
some hosts prefer the adult color pattern. Small L. phthirophagus shifted to adult
coloration more quickly when starved than when provided with host fish on which to
feed, indicating that the coloration shift is motivated by hunger. Even though juvenile coloration in some fishes may reduce the aggression
received from adults, in cleaner wrasses it also reduces food availability, making it
advantageous for them to shift to adult-coloration as soon as possible. Cleaner wrasses
have developed a quick, reversible coloration shift that allows changing to adult
coloration at a small size but allows reversing coloration if too much aggression is
received. / x, 59 leaves, bound : ill., maps ; 29 cm.
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The relation between birds and insects with false warning colourationBlest, A. D. January 1956 (has links)
No description available.
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Pigmentation as a strategy for reducing solar damage in reef-building corals /Kluter, Anke. January 2003 (has links) (PDF)
Thesis (Ph.D.) - University of Queensland, 2003. / Includes bibliography.
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Dispersion in camouflaged animals and searching image in predators (or, Searching image in the Carrion crow and some anti-predator adaptations in camouflaged prey)Croze, Harvey January 1967 (has links)
No description available.
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Potential for using insects to guide the search for medicinally-active chemical compounds in plantsRaudsepp-Hearne, Ciara January 2003 (has links)
This thesis investigates the possibility of using aposematic insects as guides to plants that contain pharmacologically-active compounds. Plants were monitored within national parks in the Republic of Panama over a period of six months and all insects feeding on them were collected and raised in captivity. The insects were then extracted and analyzed to determine how they were treating toxic chemical compounds in their host plant. Two principal plants were investigated with their associated insects: (1) Vismia baccifera and (2) Mikania guaco. One generalist and one specialist Lepidopteran species were found to sequester vismione B from their host plant Vismia baccifera, a cytotoxic compound active against three cancer cell lines. Two specialist Coleopterans were found to sequester the novel compound Guacanone, isolated by the primary author from the vine Mikania guaco and active against Trypanosoma cruzi, the causative agent of Chagas' disease. A generalist Coleopteran was found to not sequester this compound. (Abstract shortened by UMI.)
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Potential for using insects to guide the search for medicinally-active chemical compounds in plantsRaudsepp-Hearne, Ciara January 2003 (has links)
No description available.
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