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Table 2 Abundance of each species (number of individuals per 0.27 m² of Posidonia oceanica meadow) of the different amphipod species

From: Community structure of amphipods on shallow Posidonia oceanica meadows off Tunisian coasts

  t. g. TA BI RA HE EK MO MA ZO ZS DI
Ampelisca rubella A. Costa, 1864 DS 24 3 30    4 13    0.58
Ampelisca spinipes Boeck, 1861 DS 9 2 3   1 2 1    0.14
Ampelisca unidentata (Schellenberg, 1936) DS 5 2 7 15 1 8 13 35 3 0.70
Amphilochus neapolitanus Della Valle, 1893 U 15 8 5 6 3 4 18 9   0.54
Dexamine spiniventris (A. Costa, 1853) HeD        2    0.02
Dexamine spinosa (Montagu, 1813) HeD 16 9 14 7   59 27 5   1.08
Tritaeta gibbosa (Bate, 1862) U 1 1 8 3 1   4 2   0.16
Hyale camptonyx (Heller, 1866) He 83 75 245 244 272 200 373 211 131 14.47
Parhyale aquilina (A. Costa, 1857) He      4      0.03
Leucothoe venetiarum Giordani-Soika, 1950 Co        2    0.02
Leucothoe spinicarpa (Abildgaard, 1789) Co     1 3      0.03
Lysianassa costae (Milne-Edwards, 1830) DC 1 11   2 2 1 6 2 9 0.27
Lepidepecreum longicorne (Bate & Westwood, 1861) DC      4      0.03
Orchomene humilis (A. Costa, 1853) DC     6 7 3     0.13
Socarnes filicornis (Heller, 1866) DC        12    0.09
Elasmopus brasiliensis (Dana, 1855) He 2 14 23 11    36   10 0.76
Elasmopus pectenicrus (Bate, 1862) He          84 0.66
Elasmopus pocillimanus (Bate, 1862) He     2 3 9 4    0.14
Gammarella fucicola (Leach, 1814) De     10       0.08
Maera hirondellei Chevreux, 1900 U    7 7 4 2 10 20 3 0.42
Maera inaequipes A. Costa, 1857 U 24 31 97 13 13 59 24 67 18 2.73
Pereionotus testudo (Montagu, 1808) He 3   3 3       0.07
Metaphoxus simplex (Bate, 1857) U     2 4      0.05
Stenothoe gallensis Walker, 1904 O          125 0.99
Stenothoe monoculoides (Montagu, 1813) O   3 5 7 1   9 3 6 0.27
Aora gracilis (Bate, 1857) DS     4 5 3 6    0.14
Aora spinicornis Afonso, 1976 DS     9       0.07
Lembos websteri Bate, 1857 D 15   30        0.36
Lembos sp D      2 25 11 7   0.36
Leptocheirus guttatus (Grube, 1864) DS     14 11 49 32    0.84
Microdeutopus chelifer (Bate, 1862) D   34 2 13       0.39
Ampithoe helleri G. Karaman, 1975 He 373 430 335 1,190 1,700 1,615 631 477 60 53.75
Ampithoe ramondi Audouin, 1826 He 42 106 88 91 60 39 17 30 32 3.99
Apocorophium acutum (Chevreux, 1908) DS      6      0.05
Caprella acanthifera Leach, 1814 O     10 2 42     0.43
Caprella grandimana Mayer, 1882 O    4 3       0.06
Caprella liparotensis Leach, 1814 O     3       0.02
Deutella schieckei Cavedini, 1982 O 9 6 12        0.21
Pseudoprotella phasma (Montagu, 1804) O      7 32 22    0.48
Ericthonius punctatus (Bate, 1857) DS 121 335 101 585 68 55 203 21 131 12.78
Ericthonius difformis Milne-Edwards, 1830 DS    3   1   3    0.06
Ischyrocerus inexpectatus Ruffo, 1959 DS 18 9      2    0.23
Gammaropsis dentata Chevreux, 1900 DS 24 64 36        0.98
Gammaropsis ostroumoui (Sowinsky, 1898) DS       47     0.37
  S 18 18 21 26 25 20 25 13 12  
  N(0.27 m²) 785 1,143 1,058 2,261 2,185 2,258 1,481 889 612  
  H′(log 2) 2.69 2.58 3.03 2.06 1.29 2.08 2.61 2.09 2.84  
  J′ 0.64 0.62 0.69 0.44 0.28 0.48 0.56 0.56 0.79  
  1. In the table are given the trophic guild (t. g.), D, deposit feeders; De, plant detritus feeders; DC, deposit feeders-carnivores; DS, deposit-suspension feeders; He, herbivores; HeD, herbivores-deposit feeders; Co, commensals; O, omnivores; U, unknown Number of species (S), total abundance (N), the Shannon–Wiener diversity index (H′, log 2) and Pielou’s evenness (J′) in the nine studied localities