1,721,002 research outputs found
The Physiology of Some Teleost Fishes. Part 1. Study on the Sexual Maturity of Silver Carp, Hypothelimichthys Molitrix C. & V.
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Hyperglycemic effects of biogenic amine in the freshwater giant prawn, Macrobrachium rosenbergii
No full textX-器官-靜竇腺複合體合成釋放甲殼
類促進高血糖激素，主要在於調節醣類代
謝。生物胺及神經胜調節物質調控CHH
之釋放，淡水長臂大蝦，不論是完整或雙
眼柄剪除個體，自水溫攝氏28 度急速曝露
於低溫（攝氏14 度），2 小時內血淋巴血
醣量確有明顯的上升。因此，高血糖可認
為是低溫壓迫刺激下之典型反應，亦顯示
生物胺參與該壓迫反應。腎上腺素、多巴
胺、血動情素之作用經由眼柄中CHH，但
是低溫下高血醣反應並非全部經由CHH
之途徑， 其他因子諸如正腎上腺素及
Octopamine 很可能參與高血醣反應。Crustacean hyperglycemic hormone
(CHH), a neurohormone synthesized and
released from the x-organ sinus gland
complex, is primarily involved in
carbohydrate metabolism, and biogenic
amines and peptidergic neuroregulators are
known to modulate the release of CHH.
Marked elevations of hemolymph glucose
titers, which peaked within 2 hr, were
observed in both intact and bilaterally
eyestalk-ablated prawns, Macrobrachium
rosenbergii, when they were transferred
directly from their optimal temperature of 28
℃ to lower temperatures close to the lethal
limit. Hyperglycemia can therefore be
considered a characteristic response in this
species under cold shock. Involvement of
biogenic amines in the hyperglycemic
response was also demonstrated.
Hyperglycemic effects of epinephrine,
dopamine and serotonin were mediated
through CHH at the eyestalk level, but the
response under cold shock was not
exclusively mediated through CHH. It is
suggested that factor(s) other than CHH are
involved in the hyperglycemic response,
possibly norepinephrine or/and octopamine
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