Dawes Ben
Zoological Laboratory, King's College, London.
Wilhelm Roux Arch Entwickl Mech Org. 1934 Dec;131(4):543-574. doi: 10.1007/BF00650109.
An analysis has been made of the normal growth of the thoracic appendages in the pistol-crab,Alpheus dentipes. The chelae are the only asymmetrical appendages and, within an extensive size range, the growth-coefficient of the large chela (crusher) is smaller than that of the small chela (nipper), even in the most rapidly growing dimensions of the segment containing the growth-centre.The partition coefficient for growth in certain dimensions of the chelae is not constant but is reduced progressively during the growthperiod, due (it is suggested) to the impracticability of maintaining the intensive heterogony developed during the early stages of growth.Regenerative growth of the chelae has been studied quantitatively after autotomy of one, the other, or both normal chelae, effected once only or repeatedly as new chelae appeared at moulting. New chelae are regenerated repeatedly with little or no waning of growth intensity but in continuously growing chelae, growth intensity is substantially reduced at the end of the instar of autotomy. The amount of growth is not correlated with thenumber of days available for regeneration. When both chelae regenerate simultaneously the larger one grows relatively slower than the smaller one to the end of the instar of autotomy but afterwards this condition is reversed. When the nipper alone is autotomised, growth of the crusher is inhibited and shrinkage may occur. Crusher autotomy, on the other hand, stimulates nipper growth and to an extent which varies with the dimension.The problem of chela reversal has been discussed and certain suggestions have been preferred.
对枪蟹（Alpheus dentipes）胸附肢的正常生长进行了分析。螯是唯一不对称的附肢，在相当大的尺寸范围内，大螯（ crusher，碾碎螯）的生长系数小于小螯（ nipper，夹螯），即使在包含生长中心的节段生长最快的维度也是如此。螯在某些维度上的生长分配系数并非恒定不变，而是在生长期间逐渐降低，这可能是由于在生长早期发育起来的强烈异态性难以维持。在正常的一只螯、两只螯或两只螯都自切后，对螯的再生生长进行了定量研究，自切操作仅进行一次或随着新螯在蜕皮时出现而重复进行。新螯会反复再生，生长强度几乎没有减弱或没有减弱，但在持续生长的螯中，自切龄期末生长强度会大幅降低。生长量与可用于再生的天数无关。当两只螯同时再生时，在自切龄期末，较大的螯比较小的螯生长相对较慢，但之后这种情况会逆转。当仅夹螯自切时，碾碎螯的生长会受到抑制，可能会出现萎缩。另一方面，碾碎螯自切会刺激夹螯生长，其程度因维度而异。已经讨论了螯反转的问题，并提出了一些建议。
