Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Feeding Ecology of the Exotic Red Swamp Crayfish, Procambarus Clarkii (Girard, 1852) in the Guadiana River(Sw Iberian Peninsula)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Crustaceana

[The feeding ecology of the red swamp crayfish, Procambarus clarkii was studied from October 1999 to September 2000 in the River Guadiana, the fourth largest river in the Iberian Peninsula. Analysis of the gut contents of 1225 individuals [15.8-172.3 mm total length (TL)] from 23 sites showed a diet dominated by plants [Relative Importance Index (RI) = 50.34] and animals (RI = 31.25), followed by amorphous material (RI = 12.21) and sand (RI = 6.20). Animal food items were represented by insects, mainly dipterans (RI = 34.59) and ephemeropterans (RI = 16.10), crayfish (RI = 15.14), and fish (RI = 11.40). Classes I (TL ≤ 40 mm) and II (TL = 40.1-80 mm) had a diet dominated by animals and amorphous material. Classes III (TL = 80.1-120 mm) and IV (TL > 120 mm) had a diet dominated by plants and amorphous material. Plants were consumed by all classes throughout the year, being most important for classes III and IV in autumn and winter. For classes I and II, animal diets are important throughout the year with increasing consumption in autumn and winter. Crayfish fragments were found throughout the year in all classes with more importance in spring and summer for classes III and IV. Similarly, fish were found in the guts of the crayfish throughout the year, this prey being more important in classes III and IV in the cold seasons. The diets of males and females were very similar, although females consumed more plants (RI = 48.72) than males (RI = 46.58). In contrast, males consumed more animal prey than females (RI = 32.36 and RI = 31.30, respectively). Differences in diet between males and females were not significant (G = 0.189, df: 3, P = 0.973)., The feeding ecology of the red swamp crayfish, Procambarus clarkii was studied from October 1999 to September 2000 in the River Guadiana, the fourth largest river in the Iberian Peninsula. Analysis of the gut contents of 1225 individuals [15.8-172.3 mm total length (TL)] from 23 sites showed a diet dominated by plants [Relative Importance Index (RI) = 50.34] and animals (RI = 31.25), followed by amorphous material (RI = 12.21) and sand (RI = 6.20). Animal food items were represented by insects, mainly dipterans (RI = 34.59) and ephemeropterans (RI = 16.10), crayfish (RI = 15.14), and fish (RI = 11.40). Classes I (TL ≤ 40 mm) and II (TL = 40.1-80 mm) had a diet dominated by animals and amorphous material. Classes III (TL = 80.1-120 mm) and IV (TL > 120 mm) had a diet dominated by plants and amorphous material. Plants were consumed by all classes throughout the year, being most important for classes III and IV in autumn and winter. For classes I and II, animal diets are important throughout the year with increasing consumption in autumn and winter. Crayfish fragments were found throughout the year in all classes with more importance in spring and summer for classes III and IV. Similarly, fish were found in the guts of the crayfish throughout the year, this prey being more important in classes III and IV in the cold seasons. The diets of males and females were very similar, although females consumed more plants (RI = 48.72) than males (RI = 46.58). In contrast, males consumed more animal prey than females (RI = 32.36 and RI = 31.30, respectively). Differences in diet between males and females were not significant (G = 0.189, df: 3, P = 0.973).]

Loading

Full text loading...

/content/journals/10.1163/1568540043166001
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/1568540043166001
Loading

Article metrics loading...

/content/journals/10.1163/1568540043166001
2004-12-01
2016-12-05

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Crustaceana — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation