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Why shove your colony mates?

Jacobs and Jarvis (1996) looked at shoving in H. glaber , the naked mole-rat, testing a hypothesis that it occurs because of a conflict between a queen and her non-breeding colony members. The work-conflict hypothesis supposes that non-breeders withhold aid because they may become breeders or because it gives them more inclusive fitness, so the queen shoves them to encourage work. The effect of shoving, then, would be an increase in work. The actual results, however, were quite different. They found no relationship between relatedness and shove rate, so the queen shows no kin bias in her shoving. She is however, more likely to shove her larger workers than smaller ones. More importantly, shoving does not increase work rates. In addition, larger colony members work less than smaller members even though they are shoved more often, and non-breeders occasionally shove other non-breeders (Jacobs and Jarvis 1996). The fact that non-breeders shove each other suggests that shoving can be used to assert dominance. The larger workers are likely members of the dispersal caste found by O’Riain et al. (1996) and Braude (2000). The queen shoves them more often because they pose more of a threat to her dominance, and possibly, shoving helps ensure their reproductive suppression.

Naked mole-rats are facultative inbreeders , meaning they will inbreed since they have no aversion to it. Given the option, however, they choose to outbreed (Clarke and Faulkes 1999, Ciszek 2000). Both Clarke and Faulkes (1999) and Ciszek (2000) found experimentally that reproductively active females generally preferred unfamiliar mates to familiar ones. In order to distinguish familiar from unfamiliar mole-rats, comparable to distinguishing kin from non-kin, they likely use scent ( [link] ). In naked mole-rats, kin recognition does not help with reproductive suppression, but does allow for incest avoidance given the opportunity to outbreed. Outbreeding encourages gene flow, which lessens the impact of deleterious alleles on offspring fitness. Breeding with non-related mole-rats helps lower the inbreeding depression , which is the decrease in overall fitness of offspring and their reproductive capabilities caused by inbreeding.

Kin recognition

In order to maximize inclusive fitness, mole-rats must ensure that their aid is given only to relatives and not to outsiders who exploit them. As a result, they must have some way to identify relatives. As O’Riain and Jarvis (1997) point out, direct determination of relatedness in mole-rats will not work too well since relatedness in colonies is high. It is not surprising, then, that mole-rats identify colony members instead of kin. Colony members are generally highly related, and mole-rats are unlikely to encounter many foreigners inside their burrows. The probable mechanism used by mole-rats to identify foreigners and colony members is odor familiarity (O’Riain and Jarvis 1997). However, in common mole-rats and naked mole-rats, odor familiarity must be continually reinforced. If a mole-rat is removed from its colony for long enough (at least twelve hours), upon reintroduction it is viewed as foreign since it has lost the distinctive scent of the burrow (Burda 1995, O’Riain and Jarvis 1997).

Another result of kin recognition, in naked mole-rats at least, is that patrollers can identify intruders and start an alarm to get rid of them. Colony members want to keep foreign naked mole-rats out of the colony because the intruder reduces their chance at eventually gaining breeding rights (O’Riain and Jarvis 1997), especially given that breeders prefer outbreeding to inbreeding.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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Source:  OpenStax, Mockingbird tales: readings in animal behavior. OpenStax CNX. Jan 12, 2011 Download for free at http://cnx.org/content/col11211/1.5
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