Search Results - "Bakker, Theo C. M."

Predator-induced neophobia in juvenile cichlids by Meuthen, Denis, Baldauf, Sebastian A., Bakker, Theo C. M., Thünken, Timo

“…Predation is an important but often fluctuating selection factor for prey animals. Accordingly, individuals plastically adopt antipredator strategies in…”
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Nest-site selection in a fish species with paternal care by Bakker, Theo C. M., Mundwiler, Beat

“…Fish that perform paternal care may increase their fitness by choosing nest sites that enhance survival and development of embryos. We studied nest-site choice…”
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Anticipatory plastic response of the cellular immune system in the face of future injury: chronic high perceived predation risk induces lymphocytosis in a cichlid fish by Meuthen, Denis, Meuthen, Ingo, Bakker, Theo C. M., Thünken, Timo

“…Vertebrate cellular immunity displays substantial variation among taxa and environments. Hematological parameters such as white blood-cell counts have emerged…”
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influence of ambient ultraviolet light on sperm quality and sexual ornamentation in three-spined sticklebacks (Gasterosteus aculeatus) by Rick, Ingolf P, Mehlis, Marion, Eßer, Elisabeth, Bakker, Theo C. M

“…Exposure to enhanced levels of ambient ultraviolet (UV) radiation (UVR) can have adverse effects on aquatic organisms including damage at the cellular and…”
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Conspecific alarm cues affect interspecific aggression in cichlid fishes by Meuthen, Denis, Baldauf, Sebastian A, Bakker, Theo C. M, Thünken, Timo

“…Individuals have to respond simultaneously to different environmental factors often making trade-offs between conflicting demands necessary. Many freshwater…”
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Microsatellite support for active inbreeding in a cichlid fish by Langen, Kathrin, Schwarzer, Julia, Kullmann, Harald, Bakker, Theo C M, Thünken, Timo

“…In wild animal populations, the degree of inbreeding differs between species and within species between populations. Because mating with kin often results in…”
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Quantification acuity in spontaneous shoaling decisions of three-spined sticklebacks by Mehlis, Marion, Thünken, Timo, Bakker, Theo C. M., Frommen, Joachim G.

“…The ability to discriminate between different quantities is widespread throughout the animal kingdom, and the underlying mechanisms of quantity discrimination…”
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Male red ornamentation is associated with female red sensitivity in sticklebacks by Rick, Ingolf P, Mehlis, Marion, Bakker, Theo C M

“…Sexual selection theory proposes correlated evolutionary changes in mating preferences and secondary sexual characters based on a positive genetic correlation…”
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influence of ambient water temperature on sperm performance and fertilization success in three-spined sticklebacks (Gasterosteus aculeatus) by Mehlis, Marion, Bakker, Theo C. M

“…Acute and long-term temperature changes caused by global warming could lead to severe ecological and physiological consequences for aquatic organisms. This…”
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Functional variation of sperm morphology in sticklebacks by Bakker, Theo C. M, Hollmann, Michael, Mehlis, Marion, Zbinden, Marc

“…Some theoretical models of sperm competition make the assumption that in fish species with external fertilisation, sperm length relates positively to swimming…”
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Disentangling the effects of group size and density on shoaling decisions of three-spined sticklebacks (Gasterosteus aculeatus) by Frommen, Joachim G, Hiermes, Meike, Bakker, Theo C. M

“…Many animals live in groups most of their life. One function of this behaviour is an increased predator protection whereas larger groups provide better…”
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Olfactory self-recognition in a cichlid fish by Thünken, Timo, Waltschyk, Nadine, Bakker, Theo C. M, Kullmann, Harald

“…Animal self-cognizance might be of importance in different contexts like territoriality, self-referent mate-choice or kin recognition. We investigated whether…”
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Smells like sib spirit: kin recognition in three-spined sticklebacks (Gasterosteus aculeatus) is mediated by olfactory cues by Mehlis, Marion, Bakker, Theo C. M., Frommen, Joachim G.

“…The ability to recognise kin has been demonstrated in several animal species. However, the mechanisms of kin recognition often remain unknown. The most…”
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Spectral composition and visual foraging in the three-spined stickleback (Gasterosteidae: Gasterosteus aculeatus L.): elucidating the role of ultraviolet wavelengths by RICK, INGOLF P., BLOEMKER, DOMINIQUE, BAKKER, THEO C. M.

“…Visual signalling can be affected by both the intensity and spectral distribution of environmental light. In shallow aquatic habitats, the spectral range…”
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Infection with an acanthocephalan manipulates an amphipod’s reaction to a fish predator’s odours by Baldauf, Sebastian A., Thünken, Timo, Frommen, Joachim G., Bakker, Theo C.M., Heupel, Oliver, Kullmann, Harald

“…Many parasites with complex life cycles increase the chances of reaching a final host by adapting strategies to manipulate their intermediate host’s…”
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UV wavelengths make female three-spined sticklebacks (Gasterosteus aculeatus) more attractive for males by Rick, Ingolf P, Bakker, Theo C. M

“…Numerous fishes possess UV vision and show UV patterns, which often play a role in social communication, especially during courtship. UV light is scattered…”
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Enhanced ambient UVB radiation affects post-mating, but not pre-mating sexual traits in a fish by Vitt, Simon, Mehlis-Rick, Marion, Bakker, Theo C. M., Rick, Ingolf P.

“…Organisms inhabiting shallow aquatic habitats currently experience increasing levels of solar ultraviolet B radiation (UVB). UVB causes damage on cellular and…”
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You can't always get what you want: size assortative mating by mutual mate choice as a resolution of sexual conflict by Baldauf, Sebastian A, Kullmann, Harald, Schroth, Stefanie H, Thünken, Timo, Bakker, Theo C M

“…Assortative mating patterns for mate quality traits like body size are often observed in nature. However, the underlying mechanisms that cause assortative…”
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Male mate choice scales female ornament allometry in a cichlid fish by Baldauf, Sebastian A, Bakker, Theo C M, Herder, Fabian, Kullmann, Harald, Thünken, Timo

“…Studies addressing the adaptive significance of female ornamentation have gained ground recently. However, the expression of female ornaments in relation to…”
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Adaptive parasitic manipulation as exemplified by acanthocephalans by Bakker, Theo C. M., Frommen, Joachim G., Thünken, Timo, Bshary, R.

“…Parasites with complex life cycles often change intermediate host traits in order to enhance their transmission to the next host. Acanthocephalans are…”
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