Hormonal regulation of colour change in eyes of a cryptic fish

Helen Nilsson Sköld, Daniel Yngsell, Muhmd Mubashishir, Margareta Wallin

Forskningsoutput: TidskriftsbidragArtikelPeer review

Sammanfattning

Colour change of the skin in lower vertebrates such as fish has been a subject of great scientific and public interest. However, colour change also takes place in eyes of fish and while an increasing amount of data indicates its importance in behaviour, very little is known about its regulation. Here, we report that both eye and skin coloration change in response to white to black background adaptation in live sand goby Pomatoschistus minutes, a bentic marine fish. Through in vitro experiments, we show that noradrenaline and melanocyte concentrating hormone (MCH) treatments cause aggregation of pigment organelles in the eye chromatophores. Daylight had no aggregating effect. Combining forskolin to elevate intracellular cyclic adenosine monophosphate (cAMP) with MCH resulted in complete pigment dispersal and darkening of the eyes, whereas combining prolactin, adrenocorticotrophic hormone (ACTH) or melanocyte stimulating hormone (α-MSH) with MCH resulted in more yellow and red eyes. ACTH and MSH also induced dispersal in the melanophores, resulting in overall darker eyes. By comparing analysis of eyes, skin and peritoneum, we conclude that the regulation pattern is similar between these different tissues in this species which is relevant for the cryptic life strategy of this species. With the exception of ACTH which resulted in most prominent melanophore pigment dispersal in the eyes, all other treatments provided similar results between tissue types. To our knowledge, this is the first study that has directly analysed hormonal regulation of physiological colour change in eyes of fish.

OriginalspråkEngelska
Sidor (från-till)206-211
Antal sidor5
TidskriftBiology Open
Volym4
Utgåva2
DOI
StatusPublicerad - 2015
Externt publiceradJa

Nationell ämneskategori

  • Annan biologi (10699)

Fingeravtryck

Fördjupa i forskningsämnen för ”Hormonal regulation of colour change in eyes of a cryptic fish”. Tillsammans bildar de ett unikt fingeravtryck.

Citera det här