of common raven, Corvus corax, in reducing crop pests population in
some agricultural areas in Algeria
Guerzou1*, K. Souttou1, W. Derdoukh2,? M.
Guerzou3 and S. Doumandji3
1Faculty of Science
and Nature, University Ziane Achour of Djelfa, Djelfa-17000, Algeria
2Faculty of Science
and Nature, University Jijel, Jijel-18000, Algeria
Agricultural and Forest Zoology Agronomical Upper National School, El-Harrah
Author E-mail: email@example.com
received : 03.12.2015
received : 04.05.2016
received : 11.10.2016
Accepted : 09.11.2016
Aim: The aim of the
present study was to investigate through diet analysis, how common raven
contribute to control some crop pests in two regions of Algeria, Djelfa and
diet of Common raven was realized by analysis of one hundred and sixty
pellets. Each pellet was dissected in water and gently broken apart, and prey
remains were separated manually. Vertebrate prey items were identified from
bones. Insects were identified from the main body parts, including heads,
mandibles, antennae, legs and especially elytrae.
total of 224 preys were identified in trophic diet of common raven at Djelfa
region and 65 at Laghouat. Among these prey groups, insects were mostly
ingested by common raven in both Djelfa (80.3 %) and Laghouat (93.4 %). In
terms of biomass, Meriones shawii was mostly consumed by ravens (53.5
% in Djelfa and 63.93 % in Laghouat). Also, Passer spp. was one of the most
profitable to ravens (11.7 % in Djelfa and 3.9 % in Laghouat).
common raven can participate in rodents and birds population, which pose a
great threat to crops in agricultural areas.
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