Navigation Links
Male seahorses like big mates
Date:7/7/2009

Male seahorses have a clear agenda when it comes to selecting a mating partner: to increase their reproductive success. By being choosy and preferring large females, they are likely to have more and bigger eggs, as well as bigger offspring, according to Beat Mattle and Tony Wilson from the Zoological Museum at the University of Zurich in Switzerland. Their findings1 have just been published online in Springer's journal Behavioral Ecology and Sociobiology.

Seahorses have a unique mode of reproduction: male pregnancy. Male seahorses provide all post-fertilization parental care, yet despite the high levels of paternal investment, they have long been thought to have conventional sex roles, with females choosing mating partners and males competing for their attention. However, clutch, egg and offspring size all increase with female body size in seahorses, suggesting that males may obtain fecundity benefits by mating with large-bodied females.

Mattle and Wilson investigated the mating behavior of the pot-bellied seahorse (Hippocampus abdominalis), concentrating on the importance of partner body size in mate selection. A total of 10 female and 16 male sexually mature seahorses, obtained from a captive breeding facility in Tasmania, took part in the experiment. Individuals of both sexes were presented with potential mating partners of different sizes. Mating preferences were quantified in terms of time spent courting each potential partner.

Mattle and Wilson found striking differences in courtship behavior between male and female seahorses, with choosy males and indiscriminate females. Male seahorses were highly active and showed a clear preference for larger partners. In contrast, females were significantly less active and showed ambiguous mating preferences.

The authors conclude: "The strong male preferences for large females demonstrated here suggest that sexual selection may act strongly on female body size in wild populations of H. abdominalis, consistent with predictions on the importance of female body size for reproductive output in this species."


'/>"/>

Contact: Ana Granadillo Markl
Ana.GranadilloMarkl@springer.com
49-622-148-78414
Springer
Source:Eurekalert

Related biology news :

1. Male seahorses are natures Mr. Mom, Texas A&M researchers say
2. Male seahorses are natures Mr. Mom, Texas A&M researchers say
3. European lead in reading past climates from ice cores
4. Researchers examine closest living relative to primates
5. New model revises estimates of terrestrial carbon dioxide uptake
6. Female katydids prefer mates cool in winter and hot in summer
7. Experts prove the geochemical origin of part of the CO2 emissions in semiarid climates
8. Slowly-developing primates definitely not dim-witted
9. Female concave-eared frogs draw mates with ultrasonic calls
10. Big brains arose twice in higher primates
11. Fish cancer gene linked to pigment pattern that attracts mates
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/8/2016)... Czech Republic , February 8, 2016 /PRNewswire/ ... EU-regulated global payment platform which presents innovation for ... Biometrics Authentication feature called VoiceKey. --> ... platform which presents innovation for clients, comfort and ... called VoiceKey. --> Worldcore ...
(Date:2/3/2016)... Sweden , February 4, 2016 --> ... amounted to SEK 1,351.5 M (105.0), up 1,187% compared with fourth quarter ... profit amounted to SEK 517.6 M (loss: 30.0). Earnings per ... operating activities was SEK 537.4 M (neg: 74.7). , ... , Revenues amounted to SEK 2,900.5 M (233.6), up 1,142% compared ...
(Date:2/3/2016)... 3, 2016 ... the "Emotion Detection and Recognition Market ... Others), Software Tools (Facial Expression, Voice Recognition ... Regions - Global forecast to 2020" ... http://www.researchandmarkets.com/research/d8zjcd/emotion_detection ) has announced the addition ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... ... February 10, 2016 , ... SonaCare Medical, LLC ... support program, Sonalinkā„¢ remote monitoring. The inaugural launch of this new technology occurred ... connecting Dr. Samuel Peretsman to a HIFU technical expert at SonaCare Medical headquarters. ...
(Date:2/10/2016)... ... February 09, 2016 , ... ... current winner of the Highest Overall Customer Rating Award from Circuits Assembly , ... business units across the USA, Canada, Mexico and China. , The EMS provider, ...
(Date:2/9/2016)... ... 2016 , ... Clinovo , the cloud-based eClinical software ... Capture (EDC) system ClinCaptureand its new Contract Research Organization (CRO) Partner Program ... San Mateo, California on February 10th and 11th. Watch 2-min video . ...
(Date:2/9/2016)... , Feb. 9, 2016  DNAtrix, a ... for cancer, announced that its lead product, ... Commission as an orphan medicinal product for ... form of glioma, strikes approximately 25,000 people ... http://photos.prnewswire.com/prnh/20160208/330986LOGO --> ...
Breaking Biology Technology: