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No Experimental Evidence for Sneaking in a West African Cichlid Fish with Extremely Long Sperm
المؤلفون المشاركون
Langen, Kathrin
Bakker, Theo C. M.
Thünken, Timo
المصدر
International Journal of Evolutionary Biology
العدد
المجلد 2013، العدد 2013 (31 ديسمبر/كانون الأول 2013)، ص ص. 1-9، 9ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2013-12-10
دولة النشر
مصر
عدد الصفحات
9
التخصصات الرئيسية
الملخص EN
Alternative reproductive tactics are widespread in fishes, increasing the potential for sperm competition.
Sperm competition has enormous impact on both variation in sperm numbers and sperm size.
In cichlids, the sperm competition risk is very divergent and longer sperm are usually interpreted as adaptation to sperm competition.
Here we examined whether sneaking tactics exist in Pelvicachromis taeniatus, a socially monogamous cichlid with biparental brood care from West Africa.
The small testis indicates low gonadal investment which is typical for genetically monogamous species.
In contrast, sperm length with up to 85 μm is extraordinarily long.
We examined the reproductive behaviour of ten groups with a male-biased sex ratio under semi-natural conditions via continuous video recording.
We recorded spawning site preferences and correlates of reproductive success and conducted paternity tests using microsatellites.
Safe breeding sites that could be successfully defended were preferred.
All offspring could be assigned to their parents and no multiple paternities were detected.
Body size of spawning pairs predicted their spawning probability and offspring hatching rate suggesting benefits from mating with large individuals.
Our study suggests low risk of sperm competition under the given conditions in P.
taeniatus and thus first evidence for genetic monogamy in a substrate breeding cichlid.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Langen, Kathrin& Thünken, Timo& Bakker, Theo C. M.. 2013. No Experimental Evidence for Sneaking in a West African Cichlid Fish with Extremely Long Sperm. International Journal of Evolutionary Biology،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-492709
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Langen, Kathrin…[et al.]. No Experimental Evidence for Sneaking in a West African Cichlid Fish with Extremely Long Sperm. International Journal of Evolutionary Biology No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-492709
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Langen, Kathrin& Thünken, Timo& Bakker, Theo C. M.. No Experimental Evidence for Sneaking in a West African Cichlid Fish with Extremely Long Sperm. International Journal of Evolutionary Biology. 2013. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-492709
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-492709
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
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