Gómez Luna Liliana, Sosa Montano Antonio, Moreno Castillo Isabel, Jover Capote Abdiel
Laboratorio de Ecotoxicología, Centro Nacional de Electromagnetismo Aplicado, Universidad de Oriente, Santiago de Cuba, Ave. de las Américas Esquina I, CP 90900.
Rev Biol Trop. 2009 Sep;57(3):671-86.
On the basis of fishery intensity and proximity to river mouth, a total of 257 swimming Callinectes crabs were collected from March 2007 to April 2008 in eight localities. Captures were made with hanging nets, to a maximal depth of 1.5 m, establishing a top time of 2 hr. The genus was widely distributed, and it is represented at least by four species: C. sapidus, C. similis, C. rathbunae and C. larvatus, the last two not included in the last list of Cuban crustaceans (Crustacea: Decapoda). The size and shape of the gonopods were very useful as taxonomical criteria, considering the prevalence of males. The most abundant species were C. sapidus (47.08%), and C. similis (30.35%). C rathbunae, which was identified at 75% (6) of the localities, showed a better distribution, followed by C. sapidus, which appears in the 63% (5). Sex rate (R(s)) by species (male:female) was 6.20 for C. rathbunae, 3.58 for C. similis, 1.40 for C. larvatus and 0.40 for C. sapidus. The most abundant species had a lower R value. Morphometrical analysis and weight allowed us to know the average carapace width (CW) and weight (W). C. sapidus had an average CW = 110.57 mm (DS 21.55, n = 121) and W = 84.46 g (SD 43.25, n = 121); C. rathbunae a CW = 115.50 mm (DS 14.94, n = 36) and W = 140.44 g (DS 55.02, n = 36); C. larvatus a CW = 76.04 mm (DS 10.88, n = 22) and W = 31.70 g (DS 14.67, n = 22); and C. similis had the minimal parameter values, with a CW = 59.77 mm (DS 14.09, n = 78) and W = 13.80 g (DS 10.00, n = 78). These are the first records of the coastal crabs in the area. All values are lower than in previous reports. The largest individuals (CW>140 mm: C. rathbunae and C. sapidus) were captured in localities with adequate environmental characteristics. The stomach content suggests nine dietary categories, mainly fishes and macroalgae. The genus Callinectes has a diversified trophic spectrum. These crabs eat the available food, but they have a preference for the most abundant items.
根据渔业强度和与河口的距离，2007年3月至2008年4月期间，在八个地点共采集了257只游泳的美青蟹。使用悬挂网进行捕捞，最大深度为1.5米，每次捕捞时间最长为2小时。该属分布广泛，至少有四个物种：美味美青蟹、相似美青蟹、拉氏美青蟹和幼虫美青蟹，后两种未列入古巴甲壳类动物（甲壳纲：十足目）的最新名录。考虑到雄性的普遍性，交接器的大小和形状作为分类标准非常有用。最常见的物种是美味美青蟹（47. / 08%）和相似美青蟹（30.35%）。在75%（6个）的地点鉴定出拉氏美青蟹，其分布更好，其次是美味美青蟹，出现在63%（5个）的地点。按物种计算的性别比（R(s)）（雄性：雌性），拉氏美青蟹为6.20，相似美青蟹为3.58，幼虫美青蟹为1.40，美味美青蟹为0.40。最常见的物种R值较低。形态测量分析和重量使我们能够了解平均头胸甲宽度（CW）和重量（W）。美味美青蟹的平均CW = 110.57毫米（标准差21.55，n = 121），W = 84.46克（标准差43.25，n = 121）；拉氏美青蟹的CW = 115.50毫米（标准差14.94，n = 36），W = 140.44克（标准差55.02，n = 36）；幼虫美青蟹的CW = 76.04毫米（标准差10./ 88，n = 22），W = 31.70克（标准差14.67，n = 22）；相似美青蟹的参数值最小，CW = 59.77毫米（标准差14.09，n = 78），W = 13.80克（标准差10.00，n = 78）。这些是该地区沿海蟹类的首次记录。所有数值均低于先前报告。最大的个体（CW>140毫米：拉氏美青蟹和美味美青蟹）在具有适宜环境特征的地点捕获。胃内容物表明有九种食物类别，主要是鱼类和大型藻类。美青蟹属具有多样化的食物谱。这些螃蟹食用可得的食物，但它们偏好最丰富的食物种类。
