中文摘要：

头足纲动物的鸟喙是重要难纸巾。理解鸟喙的形态学能在生态系统在头足纲动物的角色上产出批评信息。阿根廷的 shortfin 枪乌的南方 patagonic 股票， Illex argentinus，最重要的钓鱼目标的不仅一，而且在西南大西洋的海洋的生态系统的最重要的种类之一。430 件样品的一个总数我。包括在披风长度(ML ) 和在 ML 的 201 男性 140298mm 的 229 女性 103346mm， argentinus 被中国枪乌 jigging 容器在 2 月期间从区域收集离开 Argentinean 水的独占的经济地区到 2007 年 5 月。他们的鸟喙的形态学被评估。在鸟喙之间的关系词法变量和 ML 在男性和女性之中显著地不同。他们能是对数函数除了上面的翅膀长度(UWL ) 和更低的坛长度(LRL ) 为男性为女性和线性功能描述的最好，它在他们与 ML 的关系中跟随了指数的功能。结果为南方 patagonic 股票在在 ML 和鸟喙形态学之间的关系中显示出性同种二形我。argentinus。然而，没有重要差别在鸟喙的关系中在男性和女性之间被发现词法变量(除了 UWL ) 对身体重量(BW ) ，建议在词法变量和 BW 能被用于估计生物资源的鸟喙之间的关系由他们的食肉动物消费了。

英文摘要：

Beak of cephalopod is an important hard tissue. Understanding the morphology of beak can yield critical infor- mation on the role of cephalopods in the ecosystem. The south patagonic stock of the Argentine shortfin squid, Illex argentinus, is not only one of the most important fishing targets, but also one of the most important species in the marine eco-system of the southwest Atlantic. A total of 430 samples ofL argentinus, including 229 females 103-346mm in mantle length （ML） and 201 males 140-298mm in ML, were collected from the area off the Exclusive Economic Zone of Argentinean waters by Chinese squid jigging vessels during February to May 2007. The morphology of their beaks was evaluated. The relationships between beak morphological variables and ML differed significantly among males and females. They could be best described by loga- rithmic functions for females and linear functions for males except for upper wing length （UWL） and lower rostrum length （LRL）, which followed exponential functions in their relationships with ML. The results showed the sexual dimorphism in the relationship between ML and beak morphology for the south patagonic stock ofL argentinus. However, no significant differ- ence was found between males and females in the relationships of beak morphological variables （except for UWL） versus body weight （BW）, suggesting that the relationship between beak morphological variables and BW can be used for estimating the biomass consumed by their predators.