EFFECTS OF SALT LOADING ON SALT-GLAND FUNCTION IN THE EURYHALINE TURTLE, MALACLEMYS-TERRAPIN
EFFECTS OF SALT LOADING ON SALT-GLAND FUNCTION IN THE EURYHALINE TURTLE, MALACLEMYS-TERRAPIN
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DOI：
10.1007/bf00782600
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发表时间：
1981-01-01
期刊：
影响因子：
--
通讯作者：
COWAN, FBM
中科院分区：
文献类型：
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作者：
COWAN, FBM
河口龟在淡水、55%海水或100%(全强度)海水中均能调节离子，但在100%海水中调节能力不强。通过一种新的眼杯方法收集的眼眶分泌物在所有三个盐度的动物中都非常低，没有盐负荷。盐负荷后，所有3组动物产生的轨道分泌物的钠浓度高于海水。三组的离子浓度和反应动力学都是相似的。在注射负荷排出之前，眼眶腺体分泌物恢复到控制前负荷水平。血浆钠浓度与眼眶腺体反应的任何参数均无相关性。泪液中钠的浓度和排钠速率与K+刺激的腺体中对硝基苯基磷酸酶活性水平之间无相关性。其中一些结果可能与马拉克莱米斯所占据的河口栖息地有关。
The estuarine turtle, M. terrapin, is able to ionregulate when acclimated to fresh water, 55% sea water or 100% (full strength) sea water, but when in 100% sea water it does not volume regulate successfully. Orbital gland secretions collected by a new eye cup method are very low in animals from all 3 salinities without salt load. After salt loading the animals from all 3 groups produce an orbital secretion with a Na concentration greater than sea water. The concentration of ions and kinetics of the response are similar in all 3 groups. Orbital gland secretion returns to control preload levels well before the injected load is excreted. There is no correlation between plasma Na concentration and any of the parameters of the orbital gland response. There is no correlation between the concentration of Na in the tear fluid or the rate of Na excretion and the level of K+-stimulated p-nitrophenylphosphatase activity in the gland. Some of these results may relate to the estuarine habitat occupied by Malaclemys.