نتایج جستجو برای: gasterosteus
تعداد نتایج: 729 فیلتر نتایج به سال:
The male three-spined stickleback (Gasterosteus aculeatus) produces a glue protein named "spiggin" that is used as a cementing substance for building its nest. The synthesis of spiggin is under the control of androgenic stimulation. Therefore, spiggin is an effective biomarker of any androgenic activity displayed by environmental chemicals, similarly to the use of vitellogenin as an estrogenic ...
Aim This study furthers the documentation of the geographical distribution of two divergent (c. 3%) mitochondrial DNA clades in the threespine stickleback (Gasterosteus aculeatus) and tests the hypotheses that the northeastern Pacific distribution has been influenced by post-glacial colonization and lake elevation and that clade identity is associated with certain morphological attributes such ...
Tooth microwear feature densities were significantly increased in a population of laboratory-reared three-spined stickleback Gasterosteus aculeatus in four days, after they were transferred from a limnetic feeding regime to a benthic feeding regime. These results show that even in aquatic vertebrates with non-occluding teeth, changes in feeding can cause changes in tooth microwear in just a few...
The influence of relatedness on male-male aggression was tested in three-spined sticklebacks Gasterosteus aculeatus. The intensity of aggression against brothers and non-kin males did not differ significantly, indicating that kin recognition plays at most a minor role in aggressive interactions between male G. aculeatus.
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