Where do insects have their magnetoreceptor? Antennae of cockroach are not likely candidates.

VÁCHA, Martin. Where do insects have their magnetoreceptor? Antennae of cockroach are not likely candidates. In The 8th Congress of the International Society for Neuroethology. Vancouver, Canada: The International Society for Neuroethology, 2007, s. 59-60.

Základní údaje

• Originální název: Where do insects have their magnetoreceptor? Antennae of cockroach are not likely candidates.
• Název česky: Kde má hmyz svůj magnetoreceptor? Tykadla švába nejsou pravděpodobnými kandidáty.
• Autoři: VÁCHA, Martin.
• Vydání: Vancouver, Canada, The 8th Congress of the International Society for Neuroethology, od s. 59-60, 2 s. 2007.
• Nakladatel: The International Society for Neuroethology

Další údaje

• Originální jazyk: angličtina
• Typ výsledku: Stať ve sborníku
• Obor: 30105 Physiology
• Stát vydavatele: Česká republika
• Utajení: není předmětem státního či obchodního tajemství
• WWW: URL
• Organizační jednotka: Přírodovědecká fakulta
• Klíčová slova anglicky: insect magnetoreception antennae behaviour
• Štítky: insect magnetoreception antennae behaviour
• Příznaky: Mezinárodní význam, Recenzováno

Anotace

Both the molecular principle and the localization of the animal magnetoreceptor are open problems for neuroethology. In vertebrates, neuro-behavioral tests helped to locate first candidate structures hosting a hypothetical magnetoreceptor. In insects however, there is no direct evidence of any structure or organ being involved in magnetosensitive behaviour. The two hypotheses of magnetoreception have been considered for years: the magnetite hypothesis proposes that magnetic input is mediated by particles of magnetite, whareas the radical pair model suggests that chemical processes involving photopigments of the vision pathway may be modified by geomagnetic field; the first being the variation of mechanoreception the latter the variation of photoreception. Insect antenae as organs specialised for different sensory capacities seem to be good candidates also to play a role in insect magnetoreception skills. Antennae stand outside the vision sensory pathway and their involvement in magnetoreception would point to magnetite hypothesis. Such idea has also been supported by findings of ferromagnetic particles. In the present study, we tested the impact of total ablation of both antennae on the spontaneous magnetosensitive reaction of american cockroach Periplaneta americana. The assay is based on finding that movement actitivity (restlesness) of cockroaches kept individually in petri dishes rises under influence od slow periodical rotation of horizontal compoment of the geomagnetic field. We found no loss of receptive reaction in antennaeless cockroaches. It is likely that antennae, however important sensory apparatus they are, play a small role (if any) in cockroach magnetic reception. The result may narrow the spectrum of potential candidate structures and mechanisms of insect magnetoreception.

Anotace česky

Both the molecular principle and the localization of the animal magnetoreceptor are open problems for neuroethology. In vertebrates, neuro-behavioral tests helped to locate first candidate structures hosting a hypothetical magnetoreceptor. In insects however, there is no direct evidence of any structure or organ being involved in magnetosensitive behaviour. The two hypotheses of magnetoreception have been considered for years: the magnetite hypothesis proposes that magnetic input is mediated by particles of magnetite, whareas the radical pair model suggests that chemical processes involving photopigments of the vision pathway may be modified by geomagnetic field; the first being the variation of mechanoreception the latter the variation of photoreception. Insect antenae as organs specialised for different sensory capacities seem to be good candidates also to play a role in insect magnetoreception skills. Antennae stand outside the vision sensory pathway and their involvement in magnetoreception would point to magnetite hypothesis. Such idea has also been supported by findings of ferromagnetic particles. In the present study, we tested the impact of total ablation of both antennae on the spontaneous magnetosensitive reaction of american cockroach Periplaneta americana. The assay is based on finding that movement actitivity (restlesness) of cockroaches kept individually in petri dishes rises under influence od slow periodical rotation of horizontal compoment of the geomagnetic field. We found no loss of receptive reaction in antennaeless cockroaches. It is likely that antennae, however important sensory apparatus they are, play a small role (if any) in cockroach magnetic reception. The result may narrow the spectrum of potential candidate structures and mechanisms of insect magnetoreception.

Návaznosti

• MSM0021622416, záměr: Název: Diverzita biotických společenstev a populací: kauzální analýza variability v prostoru a čase

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Diverzita biotických společenstev: kauzální analýza variability v prostoru a čase