Reproductive Traits of Some Amphipods (Crustacea: Peracarida) in
Different Habitats of Iran and Southern Caspian Sea
Table 2
Mean length of male and female specimens for each species.
Species
Mean length ± SEa
-valueb
Sex ratio (F/M)
Min. and max. length of ovigerous female
Gammarus lacustris G.O. Sars, 1863
(321) (397)
2.26*
1 : 1.5
8–16.7
Gammarus paricrenatus Stock et al. 1998
(274) (350)
5.43*
1 : 1.2
10–14.5
Gammarus komareki Schaferna, 1992
(876) (1093)
16.64*
1 : 1.2
5.5–12
Gammarus aequicauda Martynov,1931
(228) (274)
6.74*
1 : 1.2
5.4–14
Obesogammarus acuminatus Stock et al. 1998
(120) (109)
1.17
1 : 1.2
7.2–16.7
Pontogammarus maeoticus (Sowinsky, 1894)
(334) (641)
5.73*
1 : 2.2
6.1–12.8
Pontogammarus borceae (Carausu, 1943)
(236) (214)
0.23
1 : 1
5–13.3
aThe measurements did not include newly hatched and juvenile individuals. The numbers are examined presented in the parenthesis.
b-test for equality of mean length between sexes.
*Significant difference at the .05 level.