Open AccessMultiple paternity in the common frog ( Rana temporaria ): genetic evidence from tadpole kin groups
Author(s) -
Laurila Anssi,
Seppä Perttu
Publication year - 1998
Publication title -
biological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.906
H-Index - 112
eISSN - 1095-8312
pISSN - 0024-4066
DOI - 10.1111/j.1095-8312.1998.tb01515.x
Subject(s) - biology , spawn (biology) , kin selection , zoology , population , mating , sperm competition , rana , offspring , ecology , genetics , anatomy , demography , sociology , pregnancy
Very few studies have investigated the occurrence of multiple paternity and sperm competition in amphibians. We studied genetic relatedness within kin groups of tadpoles of an aquatically breeding anuran Rana temporaria using allozymes. We collected samples from 52 naturally fertilized spawn clumps produced by single females at three breeding sites in two populations. We estimated relatedness (r) within kin groups, and compared the observed genotype distributions of the tadpoles (on average 23 individuals in each group) with the expected distributions based on single mating. Average relatedness over five polymorphic loci was 0.44 and 0.43 in the two populations, the latter being significantly smaller than that expected by single mating (0.5). The number of patrilines, calculated from relatedness estimates, was 1.3 in one population and 1.4 in the other. Genotype distributions deviated significantly from the expected in half of the kin groups and at all breeding sites. The results show that egg clutches of R. temporaria commonly contain multiply sired offspring. We suggest that communal breeding may affect paternity patterns in R. temporaria as well as in anurans in general.