Ejaculatory strategies associated with experience of losing.
نویسندگان
چکیده
Modulation of behaviours as a result of fighting experience has been observed in many animals and can influence pre-copulatory sexual selection. This study investigated how fighting experience affects ejaculatory strategies. In male flour beetles, Gnatocerus cornutus, experience of losing a fight decreases a male's aggressiveness for up to 4 days. We found that males losing a fight show increased ejaculatory investment, but there was no ejaculatory modulation owing to winning. However, the increase in ejaculate investment following a loss was no longer observed after 5 days. These results indicate that males adjust their investment in sperm competition according to their experience, and that fighting experience can significantly influence pre- and post-copulatory reproductive tactics.
منابع مشابه
EXPERIENCE WITH 115 PATIENTS WITH CONGENITAL A DREN AL HYPERPLASIA AND EVALUATION OF GROWTH PATTERNS IN 24 PATIENTS WITH THE SALT-LOSING TYPE
In this study the data on 115 cases of congenital adrenal hyperplasia (CAH) who were followed in the Pediatric Endocrine Clinic at Nemazee Hospital, Shiraz will be reported. Among these cases 51 were male and 64 female. The most common type of CAH in these patients was the salt-losing type of 21 -hydroxylase deficiency (85 .2%). ll-hydroxylase deficiency was present in 13.04% of patients. ...
متن کاملEjaculatory pain: a specific postherniotomy pain syndrome?
BACKGROUND Sexual dysfunction due to ejaculatory and genital pain after groin hernia surgery may occur in approximately 2.5% of patients. However, the specific psychosexological and neurophysiologic characteristics have not been described, thereby precluding assessment of pathogenic mechanisms and treatment strategies. METHODS Ten patients with severe pain-related sexual dysfunction and ejacu...
متن کاملGender Inequality in the Lived Experience of Social and Cultural Active Kurdish Women
This study has reviewed the lived experience of social and cultural active Kurdish women using qualitative methods and the Grounded Theory. The purpose of this study is identifying their attitude and practical responses to "gender inequality". Due to comparing two different aspects of these women's lived experience, at the end of the study, two paradigmatic models are obtained. The analysis of ...
متن کاملDispersal and ejaculatory strategies associated with exaggeration of weapon in an armed beetle.
Weapons used in male fighting can be costly to males and are often reported to trade off with other characters such as wings or spermatogenic investment. This study investigated whether increased investment into weapons can generate evolutionary changes in mating strategy for armed males. Male flour beetles, Gnatocerus cornutus, have enlarged mandibles that are used in male-male competition. We...
متن کاملRevisiting The Relationship between The Ejaculatory Abstinence Period and Semen Characteristics
Variations in the ejaculatory abstinence durations suggested by different guidance bodies have resulted in a growing concern among researchers over what the concise period of ejaculatory abstinence for an optimal semen sample ought to be. Several studies have been undertaken to examine the association between the length of sexual abstinence and semen characteristics. Not all studies, however, h...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Biology letters
دوره 6 5 شماره
صفحات -
تاریخ انتشار 2010