Skip to main content

Behavioural and morphological differences between lake and river populations of Salaria fluviatilis

Buy Article:

$43.00 plus tax (Refund Policy)

Three populations (one from a river and two from lakes) of Salaria fluviatilis, the only exclusively freshwater representative of the Blenniidae, showed significant differences in reproductive behaviour and morphology. Breeding males and females were significantly larger at maturity in the river than the two lake populations. The two lake populations, however, showed the greatest degree of morphological difference, the river population being intermediate. The mating system of each population could be described as resource-based and promiscuous with parasitic ‘sneaker’ males that released sperm in the nests of other males. During spawning, males from the river population released sperm significantly more often than the lake populations. This was paralleled by a greater investment in sperm as measured by relative testis mass in the river population. This was interpreted as the need to counteract the loss of sperm during fertilization as a result of the strong flow in the river. Thus some of the patterns of trait variance fitted predictions of adaptations. Other traits, however, varied randomly across populations suggesting change through genetic drift.
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Keywords: Blenniidae; morphology; population divergence; river blenny; spawning; sperm

Document Type: Regular Paper

Affiliations: 1: Department of Biology, University of Padova, Via U. Bassi 58/B, Padova 35131, Italy and 2: Department of Marine Zoology, University of Groningen, 9750 AA Haren, The Netherlands

Publication date: 2003-08-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more