Navigation Links
Paternity of subordinates raises cooperative effort in cichlids
Date:10/12/2011

Cichlid male nannies help out, especially if they've been sneaking

The highly social cichlid fish Neolamprologus pulcher displays cooperative breeding behavior, where non-parents contribute to rearing the offspring of the dominant breeding pair. Until now, it was assumed that male subordinates never gained paternity in the field. A new study published Oct. 12, in the online journal PLoS ONE, reveals that some offspring from this domestic arrangement are actually fathered by subordinate members of the group, and when this happens these fish increase investment.

The study demonstrates that the level of cooperative behavior is affected by direct fitness benefit - producing their own offspring - on top of indirect benefits such as safety, or raising related offspring.

The researchers, led by Rick Bruintjes at the University of Bristol, found that while dominant females sired 99.7% of all offspring, the dominant males only sired 88.8%. Subordinate females did not participate in reproduction, but male subordinates successfully gained paternity in 28% of all clutches.

Subordinate males that sired offspring defended more rigorously against predators compared to similar males that did not sire offspring. Neither parentage nor other helping behaviors were affected by relatedness between subordinates and dominants. According to Dr Bruintjes, "this is the first evidence in a cooperatively breeding fish species that the helping effort of male subordinates may depend on obtained paternity, which stresses the need to consider direct fitness benefits in evolutionary studies of helping behaviour."


'/>"/>
Contact: Yael Franco
yfranco@plos.org
415-568-3169
Public Library of Science
Source:Eurekalert

Page: 1

Related biology news :

1. Paternity testing helps fill in family tree for Puget Sounds killer whales
2. Whale sharks may produce many litters from 1 mating, paternity test shows
3. Fading ability to taste iron raises health concerns for people over age 50
4. Extreme weight gain raises risk for recurrence among breast cancer survivors
5. Missing sugar molecule raises diabetes risk in humans
6. FASEB praises President Obama for increasing funding for research in his FY 2012 budget
7. New UCLA study raises questions about genetic testing of newborns
8. Golf Atlanta charity tournament raises $105,000 for TGen research
9. AMP commends SACGHS whole genome sequencing focus, raises ethical questions and forms working group
10. Geochemist raises questions about carbon sequestration at Goldschmidt Conference
11. Study raises new concerns about radiation and breast cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/3/2016)...  Neurotechnology, a provider of high-precision biometric identification ... Identification System (ABIS) , a complete system for ... can process multiple complex biometric transactions with high ... face or iris biometrics. It leverages the core ... MegaMatcher Accelerator , which have been used in ...
(Date:4/28/2016)... and BANGALORE, India , April 28, 2016 ... a product subsidiary of Infosys (NYSE: INFY ), ... a global partnership that will provide end customers ... mobile banking and payment services.      (Logo: ... innovation area for financial services, but it also plays a ...
(Date:4/28/2016)... -- First quarter 2016:   , Revenues ... first quarter of 2015 The gross margin was 49% ... and the operating margin was 40% (-13) Earnings per ... from operations was SEK 249.9 M (21.2) , Outlook ... 7,000-8,500 M. The operating margin for 2016 is estimated ...
Breaking Biology News(10 mins):
(Date:5/5/2016)... ON (PRWEB) , ... May 05, 2016 , ... ... following the previously announced identification of its first three targets, it has identified ... misfolded Amyloid beta (Aß), implicated in the development and progression of Alzheimer’s disease ...
(Date:5/4/2016)... ... May 05, 2016 , ... CereScan, the nation’s leader ... Association during National Stroke Awareness Month in May. An infographic created by ... month. CereScan will donate $1 up to a maximum of $3,000 through ...
(Date:5/4/2016)... ... May 04, 2016 , ... Looking for a gift ... premiere hands-on cooking experience. Offering everything from gourmet cooking classes to weekend culinary ... forget. , Guests that visit LaJollaCooks4u share an experience unlike any other. Each ...
(Date:5/4/2016)... ... May 04, 2016 , ... Proove Biosciences, Inc. , the commercial ... with McGill University . The partnership is designed to advance research in pain ... help patients in pain. With the new agreement, researchers at Proove Biosciences are able ...
Breaking Biology Technology: