Navigation Links
Sperm trading can resolve hermaphrodite mating conflicts

By directly manipulating mating performance in a tropical sea slug, Chelidonura hirundinina, researchers of the University of Tbingen have now shed light on the bizarre reproductive conflicts encountered by hermaphroditic animals. In some hermaphroditic species, such as C. hirundinina, mating partners may insist on copulating as a "male," "female," or both, resulting in unique biological conflicts over gender.

Sexual interactions in so-called cross-fertilizing simultaneous hermaphrodites, such as earthworms, snails, leeches, and some fishes, have long challenged researchers' understanding of how established theories regarding sexual selection apply in cases of hermaphroditic species. For example, combining male and female gender in one and the same individual, hermaphrodites have been predicted to frequently be at conflict (theoretically speaking) about which sexual roles to play, because matings are often more costly, in terms of evolutionary fitness, to one gender than to the other. In such cases, hermaphrodites are predicted to share a preference to copulate in the more beneficial gender role. This would appear to make the interests of any two potential mates incompatible. For 20 years, evolutionary biologists have speculated that hermaphrodites may solve such mating conflicts by "trading sperm," that is, giving sperm only when the mating partner follows suit. However, this prediction had never been proven experimentally.

In the new work, researchers Nils Anthes, Annika Putz, and Nico Michiels generated individual sea slug hermaphrodites only capable of performing a "dry" copulation--that is, without sperm transfer. Sea slugs that mated with such a "cheating" partner interrupted sexual intercourse significantly sooner than did control pairs. This supports the concept of sperm trading, where mates negotiate mating roles in order to balance sexual interactions.


'"/>

Source:Cell Press


Page: 1

Related biology news :

1. Sperm stem cells closer to being like embryonic stem cells
2. Sperm created in the laboratory from embryonic stem cells produce viable progeny
3. Crickets finicky mating behavior boosts biodiversity
4. PHACCS, an online tool for estimating the structure and diversity of uncultured viral communities using metagenomic information
5. Certain fish have a special mating preference
6. Space matters: Estimating species diversity in the fossil record
7. Weapon performance determines mating success in the collared lizard
8. Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants
9. New study examines how sense of smell affects mating and aggression in mice
10. Same-sex mating by fungi spawned infection outbreak, evidence suggests
11. Male chimpanzees prefer mating with old females
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/21/2016)... WAKEFIELD, Massachusetts , March 22, 2016 ... and facial recognition with passcodes for superior security ... MESG ), a leading provider of secure digital communications ... pilot their biometric technology and offer enterprise customers, particularly ... provide secure facial recognition and voice authentication within a ...
(Date:3/15/2016)... Yissum Research Development Company of the Hebrew University ... University, announced today the formation of Neteera Technologies ... biological indicators. Neteera Technologies has completed its first round ... Neteera,s ... from sweat ducts, enables reliable and speedy biometric identification, ...
(Date:3/11/2016)... , March 11, 2016 ... new market research report "Image Recognition Market by Technology ... (Marketing and Advertising), by Deployment Type (On-Premises and Cloud), ... To 2022", published by MarketsandMarkets, the global market is ... to USD 29.98 Billion by 2020, at a CAGR ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... ... 2016 , ... During a two day program for start-up ... CereScan’s CEO, John Kelley, joined other Denver business leaders in providing business basics ... Denver area business community, shared his top fundamental learnings in building an effective, ...
(Date:4/28/2016)... 2016 The report "Cryocooler Market ... Service (Technical Support, Product Repairs & Refurbishment, Preventive Maintenance, ... to 2022", published by MarketsandMarkets, the global market is ... at a CAGR of 7.29% between 2016 and 2022. ... 94 Figures spread through 159 Pages and in-depth TOC ...
(Date:4/28/2016)... ... April 28, 2016 , ... ... in recruiting top industry experts, and expanding its LATAM network and logistics capabilities. ... for clients to manage their clinical trial projects. , The expansion will provide ...
(Date:4/27/2016)... ... 2016 , ... The Pittcon Organizing Committee is pleased to announce that Charles ... member of Committee since 1987. Since then, he has served in a number of ... chairman for both the program and exposition committees. In his professional career, Dr. Gardner ...
Breaking Biology Technology: