Fishermen Advocates: Disclosing Forgery in Fishing Industries
E-mail: fishermenadvocates@gmail.com

   

STATISTICS

ENTER

Main » 2012 » July » 15

In general, an acquired chemical serch image forms in the long-term memory of an animal during its learning (both in the nature or laboratory) and is used further as an etalon (template, specimen) to collate the receiving perceptual information.

Get more information at Formation of the chemical search images in laboratory

In the aquatic animals, for example, the chemical search images can form in respect of odors of food, predators, school mates and other objects.

How long the aquatic animals can remember the chemical search images?



For example, American river crayfish, Orconectes virilis, trained during 2 weeks to eat freshly crushed zebra mussels, remember an odor of these molluscs without its refreshment within at least 20 days, but forget it after 40 days (Hazlett 1994). According to Brown and Smith’s (1994) laboratory experiments, fathead minnows, Pimephales promelas, lived in the nature in relatively permanent shoals of familiar mates but kept separately, remember an odor of former mates for over 2 months.

Basic References

Brown G.E., Smith R.J.F. 1994. Fathead minnows use chemical cues to discriminate shoalmates from unfamiliar conspecifics. Journal of Chemical Ecology 20, 3051-3061

Hazlett B.A. 1994. Crayfish feeding responses to zebra mussels depend on microorganisms and learning. Journal of Chemical Ecology 20, 2623-2630

Category: Ethology | Views: 626 | Added by: nickyurchenko | Date: 2012-07-15


In 1986, Kasymyan & Ponomarev have published the results of their behavioural experiments with several tens of zebrafish, Brachydanio rerio, divided into two training groups. In training Group 1, fish were fed (from birth to 3 month age) planktonic Cladocera and bloodworms (Chironomus plumosus), in Group 2  Cladocera and sludge worms (Tubifex tubifex).


Then fish were moved into an experimental aquarium, where they had the possibility to select one of two sections: with water extract of bloodworms and, respectively, with water extract of sludge worms (under concentration of these extracts 10-2 – 10-3 g/l). According to Kasumyan & Ponomarev (1986), fish of the first group preferred (displaying search feeding behaviour) an aquarium section with the Chironomus plumosus odor, and vise versa — fish of the second group preferred another section, with the Tubifex tubifex odor.

In other words, training fish preferred the familiar feeding odors.

In general and applied ethology, this phenomenon is considered in the terms of an acquired search image. An acquired search image forms in the long-term memory of an animal during its learning (both in the nature or laboratory) and is used further as an etalon (template, specimen) to collate the receiving perceptual information. In our case, an acquired chemical search image forms in respect of an odor of some object.

How chemical search images form in other fish and crustaceans,  study the basic references given below.

Basic References

Atema J., Holland K., Ikehara W. 1980. Olfactory responses of yellowfin tuna (Thunnus albacares) to prey odors: chemical search image. Journal of Chemical Ecology 6, 457-465

Brown G.E., Smith R.J.F. 1994. Fathead minnows use chemical cues to discriminate shoalmates from unfamiliar conspecifics. Journal of Chemical Ecology 20, 3051-3061

Connaughton V.P., Epifanio C.E. 1993. The influence of previous experience on the feeding habits of larval weakfish (Cynoscion regalis). ... Read more »

Category: Ethology | Views: 798 | Added by: nickyurchenko | Date: 2012-07-15

SEARCH

CALENDAR

«  July 2012  »
SuMoTuWeThFrSa
1234567
891011121314
15161718192021
22232425262728
293031

 

ENTRIES ARCHIVE

RESOURCES

  • Your Website Free
  • Customized Browsers