Breeding system, shell size and age at sexual maturity affect sperm length in stylommatophoran gastropods
نویسندگان
چکیده
منابع مشابه
Inheritance of Age at Sexual Maturity
Dr. RAYMOND PEARL (1912) was the first worker to suggest that sexlinked factors were involved in the inheritance of fecundity. PEARL used as a measure of fecundity the eggs produced during the winter period. He proposed that two major dominant factors were responsible for high egg production, one of which resided in the sex chromosome. GOODALE (1919) and HURST (1921) each failed to confirm the ...
متن کاملPredictors of shell size in long‐lived lake gastropods
AIM To investigate shell size variation among gastropod faunas of fossil and recent long-lived European lakes and discuss potential underlying processes. LOCATION Twenty-three long-lived lakes of the Miocene to Recent of Europe. METHODS Based on a dataset of 1412 species of both fossil and extant lacustrine gastropods, we assessed differences in shell size in terms of characteristics of the...
متن کاملAge, growth and length at first maturity of Otolithes ruber in the Northwestern part of the Persian Gulf, based on age estimation using otolith
Estimates of age, growth parameters, length-weight relationship and length and age at first maturity of the otolithes ruber are required for fishery management. We used counting annuli on the section of sagittal otoliths to age O.ruber from the Northwest Persian Gulf in south of Iran. Estimated ages ranged from 0 to 6 years, and maximum frequency of fishes was observed in age-group 1. The val...
متن کاملAge, growth and length at first maturity of Otolithes ruber in the Northwestern part of the Persian Gulf, based on age estimation using otolith
Estimates of age, growth parameters, length-weight relationship and length and age at first maturity of the otolithes ruber are required for fishery management. We used counting annuli on the section of sagittal otoliths to age O.ruber from the Northwest Persian Gulf in south of Iran. Estimated ages ranged from 0 to 6 years, and maximum frequency of fishes was observed in age-group 1. The val...
متن کاملSexual selection promotes colonial breeding in shell-brooding cichlid fish
http://dx.doi.org/10.1016/j.anbehav.2015.11.022 0003-3472/© 2015 The Association for the Study of A Colonial species breed in densely aggregated territories containing no resources other than nest sites. This behaviour is usually explained by natural selection, for instance through benefits resulting from reduced predation risk. An alternative hypothesis suggests that, as in lek breeding system...
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ژورنال
عنوان ژورنال: BMC Evolutionary Biology
سال: 2016
ISSN: 1471-2148
DOI: 10.1186/s12862-016-0661-9