scholarly journals Testis size depends on social status and the presence of male helpers in the cooperatively breeding cichlid Julidochromis ornatus

2006 ◽  
Vol 17 (3) ◽  
pp. 372-379 ◽  
Author(s):  
Satoshi Awata ◽  
Dik Heg ◽  
Hiroyuki Munehara ◽  
Masanori Kohda
Keyword(s):  
Social Status ◽  
Testis Size ◽  
Cooperatively Breeding

Cooperatively breeding cichlid fish adjust their testis size but not sperm traits in relation to sperm competition risk

2008 ◽  
Vol 62 (11) ◽  
pp. 1701-1710 ◽  
Author(s):  
Satoshi Awata ◽  
Tomohiro Takeyama ◽  
Yoshimi Makino ◽  
Yuko Kitamura ◽  
Masanori Kohda
Keyword(s):  
Sperm Competition ◽  
Cichlid Fish ◽  
Testis Size ◽  
Cooperatively Breeding ◽  
Sperm Competition Risk ◽  
Sperm Traits

scholarly journals The relationship between social status, behaviour, growth and steroids in male helpers and breeders of a cooperatively breeding cichlid

2006 ◽  
Vol 50 (2) ◽  
pp. 173-182 ◽  
Author(s):  
Nicole Bender ◽  
Dik Heg ◽  
Ian M. Hamilton ◽  
Zina Bachar ◽  
Michael Taborsky ◽  
...  
Keyword(s):  
Social Status ◽  
Cooperatively Breeding ◽  
The Relationship

Social status influences responses to unfamiliar conspecifics in a cooperatively breeding fish

Behaviour ◽  
2015 ◽  
Vol 152 (12-13) ◽  
pp. 1821-1839 ◽  
Author(s):  
Isaac Y. Ligocki ◽  
Adam R. Reddon ◽  
Jennifer K. Hellmann ◽  
Constance M. O’Connor ◽  
Susan Marsh-Rollo ◽  
...  
Keyword(s):  
Social Status ◽  
Cichlid Fish ◽  
Group Living ◽  
Costs And Benefits ◽  
Control Groups ◽  
High Ranking ◽  
The Social ◽  
Cooperatively Breeding ◽  
Group Members ◽  
Group Member

In group living animals, individuals may visit other groups. The costs and benefits of such visits for the members of a group will depend on the attributes and intentions of the visitor, and the social status of responding group members. Using wild groups of the cooperatively breeding cichlid fish (Neolamprologus pulcher), we compared group member responses to unfamiliar ‘visiting’ conspecifics in control groups and in experimentally manipulated groups from which a subordinate the same size and sex as the visitor was removed. High-ranking fish were less aggressive towards visitors in removal groups than in control groups; low-ranking subordinates were more aggressive in the removal treatment. High-ranking females and subordinates the same size and sex as the visitor responded most aggressively toward the visitor in control groups. These results suggest that visitors are perceived as potential group joiners, and that such visits impose different costs and benefits on current group members.

scholarly journals Subordinate male cichlids retain reproductive competence during social suppression

2011 ◽  
Vol 279 (1728) ◽  
pp. 434-443 ◽  
Author(s):  
Jacqueline M. Kustan ◽  
Karen P. Maruska ◽  
Russell D. Fernald
Keyword(s):  
Social Status ◽  
Sperm Motility ◽  
Sperm Quality ◽  
Reproductive Potential ◽  
Testis Size ◽  
Reproductive Suppression ◽  
Tightly Coupled ◽  
Astatotilapia Burtoni ◽  
Save Energy ◽  
Social Suppression

Subordinate males, which are excluded from reproduction often save energy by reducing their investment in sperm production. However, if their position in a dominance hierarchy changes suddenly they should also rapidly attain fertilization capability. Here, we asked how social suppression and ascension to dominance influences sperm quality, spermatogenesis and reproductive competence in the cichlid Astatotilapia burtoni , where reproduction is tightly coupled to social status. Dominant territorial (T) males are reproductively active while subordinate non-territorial (NT) males are suppressed, but given the opportunity, NT males will perform dominance behaviours within minutes and attain T male testes size within days. Using the thymidine analogue 5-bromo-2-deoxyuridine (BrdU) to label germ cell proliferation, we found that the spermatogenic cycle takes approximately 11–12 days, and social status had no effect on proliferation, suggesting that spermatogenesis continues during reproductive suppression. Although sperm velocity did not differ among social states, NT males had reduced sperm motility. Remarkably, males ascending in status showed sperm motility equivalent to T males within 24 h. Males also successfully reproduced within hours of social opportunity, despite four to five weeks of suppression and reduced testis size. Our data suggest that NT males maintain reproductive potential during suppression possibly as a strategy to rapidly improve reproductive fitness upon social opportunity.

Testosterone, social status and parental care in a cooperatively breeding bird

2018 ◽  
Vol 97 ◽  
pp. 85-93 ◽  
Author(s):  
Alyxandra E. Pikus ◽  
Sarah Guindre-Parker ◽  
Dustin R. Rubenstein
Keyword(s):  
Parental Care ◽  
Social Status ◽  
Breeding Bird ◽  
Cooperatively Breeding

scholarly journals Responses to intruder scents in the cooperatively breeding meerkat: sex and social status differences and temporal variation

2011 ◽  
Vol 22 (3) ◽  
pp. 594-600 ◽  
Author(s):  
Rafael Mares ◽  
Andrew J. Young ◽  
Danielle L. Levesque ◽  
Nicola Harrison ◽  
Tim H. Clutton-Brock
Keyword(s):  
Temporal Variation ◽  
Social Status ◽  
Cooperatively Breeding ◽  
Status Differences

scholarly journals Reproductive Conflict and the Costs of Social Status in Cooperatively Breeding Vertebrates

2009 ◽  
Vol 173 (5) ◽  
pp. 650-662 ◽  
Author(s):  
Dustin R. Rubenstein ◽  
Sheng‐Feng Shen
Keyword(s):  
Social Status ◽  
Reproductive Conflict ◽  
Cooperatively Breeding

Sex and social status affect territorial defence in a cooperatively breeding cichlid fish, Neolamprologus savoryi

Hydrobiologia ◽  
2014 ◽  
Vol 748 (1) ◽  
pp. 75-85 ◽  
Author(s):  
Kelly A. Garvy ◽  
Jennifer K. Hellmann ◽  
Isaac Y. Ligocki ◽  
Adam R. Reddon ◽  
Susan E. Marsh-Rollo ◽  
...  
Keyword(s):  
Social Status ◽  
Cichlid Fish ◽  
Territorial Defence ◽  
Cooperatively Breeding

Pup Provisioning in the Cooperatively Breeding African Wild Dog, Lycaon pictus, is Driven by Pack Size, Social Status and Age

2018 ◽  
Vol 48 (1) ◽  
pp. 013005 ◽  
Author(s):  
Katherine R. Forssman ◽  
Courtney Marneweck ◽  
M. Justin O'Riain ◽  
Harriet T. Davies-Mostert ◽  
Michael G.L. Mills
Keyword(s):  
Social Status ◽  
Lycaon Pictus ◽  
Pack Size ◽  
African Wild Dog ◽  
Cooperatively Breeding ◽  
Wild Dog
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