Metabolic divergence between sibling species of cichlids Pundamilia nyererei and Pundamilia pundamilia

Dijkstra, P. D.; Seehausen, O.; Metcalfe, N. B. (2013). Metabolic divergence between sibling species of cichlids Pundamilia nyererei and Pundamilia pundamilia. Journal of fish biology, 82(6), pp. 1975-1989. Blackwell 10.1111/jfb.12125

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This study compared Pundamilia nyererei and Pundamilia pundamilia males in routine metabolic rate (RR ) and in the metabolic costs males pay during territorial interactions (active metabolic rate, RA ). Pundamilia nyererei and P. pundamilia males housed in social isolation did not differ in RR . In contrast to expectation, however, P. nyererei males used less oxygen than P. pundamilia males, for a given mass and level of agonistic activity. This increased metabolic efficiency may be an adaptation to limit the metabolic cost that P. nyererei males pay for their higher rate of aggressiveness compared to P. pundamilia males. Thus, the divergence between the species in agonistic behaviour is correlated with metabolic differentiation. Such concerted divergence in physiology and behaviour might be widespread in the dramatically diverse cichlid radiations in East African lakes and may be an important factor in the remarkably rapid speciation of these fishes. The results did not support the hypothesis that higher metabolic rates caused a physiological cost to P. nyererei males that would offset their dominance advantage.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)

UniBE Contributor:

Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)

ISSN:

0022-1112

Publisher:

Blackwell

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

29 Apr 2014 09:00

Last Modified:

08 Sep 2015 09:58

Publisher DOI:

10.1111/jfb.12125

BORIS DOI:

10.7892/boris.44160

URI:

https://boris.unibe.ch/id/eprint/44160

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