TY - JOUR
T1 - Biology and reproduction of the freshwater snail Melanoides tuberculata (Gastropoda: Prosobrancida) in Israel
AU - Livshits, G.
AU - Fishelson, L.
N1 - Funding Information:
The authors wish to thank Drs. B. Moav and D. Wool for the use of electrophoretic instruments, Mrs. R. Suzin for preparation of the figures and Mr. N. Sharon for technical help. The research was supported by a grant from the UJA, Department for Absorption of Immigrant Scientists.
PY - 1983
Y1 - 1983
N2 - This study describes the biology and reproduction of several isolated populations of Melanoides tuberculata found in various water bodies in Israel and the Sinai Peninsula. Although these snails are described as parthenogenetic, we find that some populations in Israel contain 20-33% of males producing motile spermia, while other populations consist only of females. In all populations the offspring are incubated in brood-pouches. The length of incubation is correlated to population density. Electrophoretic studies of esterase (two loci) and acid phosphatase isozymes show that the observed distribution of genotypes within some of the snail populations are in good agreement with the HardyWeinberg expectation. As offspring of single females bear proteins not found in the mothers, we conclude that fertilization occurs within the population.
AB - This study describes the biology and reproduction of several isolated populations of Melanoides tuberculata found in various water bodies in Israel and the Sinai Peninsula. Although these snails are described as parthenogenetic, we find that some populations in Israel contain 20-33% of males producing motile spermia, while other populations consist only of females. In all populations the offspring are incubated in brood-pouches. The length of incubation is correlated to population density. Electrophoretic studies of esterase (two loci) and acid phosphatase isozymes show that the observed distribution of genotypes within some of the snail populations are in good agreement with the HardyWeinberg expectation. As offspring of single females bear proteins not found in the mothers, we conclude that fertilization occurs within the population.
UR - http://www.scopus.com/inward/record.url?scp=0001895679&partnerID=8YFLogxK
U2 - 10.1080/00212210.1983.10688532
DO - 10.1080/00212210.1983.10688532
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AN - SCOPUS:0001895679
SN - 0021-2210
VL - 32
SP - 21
EP - 35
JO - Israel Journal of Zoology
JF - Israel Journal of Zoology
IS - 1
ER -