Marisia - Maros Megyei Múzeum Évkönyve 29-30/2. (2010)

Zoology

Some invertebrates in arable fields from the Republic of Moldova

other researchers [1,2] that the collembolans prefer non-weedind crops and Fabaceae cultures rich in nitrogen. In July, when the faunistic material was collected, air and soil temperature were high and the drought has caused a lower percentage of soil humidity, which eventually decreased the number of Collembola individuals and species in the alfalfa field. This fact has also proved the small number of soil euedaphic species such as Metaphorura affinis, Mesaphorura critica, Folsomides parvulus and Protaphorura sakatoi. Their total numbers of specimens were only 15. Other species from epigeic and hemiedaphic groups were active during the day feeding algae, pollen and bacteria from plants and soil surface. It was proven the presence of two specimens of phytophagous species Sminthurus viridis named also “Tucerne flea”, which in large quantities can do some damage to alfalfa.

To collect coleopterans from alfalfa field were performed 10 extractions with 10 traps at intervals of 10 to 15 days. In total there were registered 36 species of beetles. The largest family proved to be Scarabaeidae, which includes 14 species from 6 genera, followed by family Carabidae with 10 species and 6 genera. The families Silphidae was represented by 6 species from 4 genera and Cerambycidae - by 3 species belonging to one genus. Families Coccinelidae, Tenebrionidae andTrogidae had only one species each. The most abundant, dominant and characteristic species for the alfalfa culture were Tanathophilus rugosus and Opatrum sabulosum, other species were accidental (Tab. 2).

Table 2: Sinecological analysis of coleopteran cenoses from alfalfa field

0 A D C W

No Species

% Class % Class % Class

1. Tanathophilus rugosus (Linnaeus, 1758) 789 65,04 D. 14 Cj 9,5 W.

2. Opatrum sabulosum {Linnaeus, 1761) 179 14,75 D. 23 C] 3,39

3. Onthophagus verticicornis Leicharting, 1781 41 3,38 D? 5 Cj 0,17 W]

4. Dorcadion tauricumNÍ-Aú, 1838 37 3,05 D, 18 Ct 0,55 W[

5. Onthophagus coenobita (Herbst, 1783) 31 2,55 D, 10 С! 0,25 Wj

6. Onthophagus fracticicornis Preyssler, 1790 22 1,81 D, 6 Cj 0,07 W]

7. Aphodius fossor (Linnaeus, 1758) 11 0,90 3 Cj 0,027 W]

8. Aphodius rufipes (Linnaeus, 1758) 11 0,90 3 C! 0,027 W[

9. Trox sobidosus (Linnaeus, 1758) 11 0,90 Dj 8 С! 0,072 W!

10. Onthophadus ovatus (Linnaeus, 1758) 9 0,74 Ö! 14 С! 0,10 N/]

7Г Lethrus apterus Laxamnn, 1770 7 0,57 D( 7 C! 0,04 W[

12. Silpha obscura Linnaeus, 1758 7 0,57 D! 5 0,03 W!

13. Onthophagus taurus Schreber, 1759 6 0,49 D( 3 C! 0,014

14. Carabus coriaceus Kraatz, 1877 6 0,49 D[ 5 C! 0,03

15. Nicrophorus fossor Erichson, 1837 5 0,41 Ü! 2 C! 0,01 W!

16. Nicrophorus vispilloides Herbst, 1784 5 0,41 D! 2 Ц 0,01 W]

17. Cetonia aurata (Linnaeus, 1758) 4 0,32 Ü! 4 C! 0,01 Wi

18. Harpalus distinguendus (Duftschmid, 1812) 4 0,32 D! 2 C] 0,01 W!

19. Harpalus rufipes (De Geer, 1774) 3 0,24 Dj 3 Cj 0,01 W]

20. Abax carinatus (Duftschmid, 1812) 2 0,16 2 Cj 0,01 Wj

21. Abaxparalellopipedus (Pili, Mitterpacher, 1783) 2 0,16 Dj 2 Cj 0,01 W]

22. Aphodiusfimetarius (Linnaeus, 1758) 2 0,16 D! 1 Cj 0,01 Wj

23. Carabus convexus Fabricius, 1775 2 0,16 D, 1 Ct 0,01 W]

24. Ophonus rufibarbis (Fabricius, 1792) 2 0,16 D! 2 Cj 0,01 Wj

25. Onthophagus vacca (Linnaeus, 1767) 2 0,16 Dj 2 Ct 0,01 W]

79