The Knobbed Porgy Calamus nodosus, an important secondary species in reef fish catches of the southeastern United States, was recently the subject of a fishery closure due to the porgy complex quota being exceeded. Knobbed Porgy (n = 448) were aged using sectioned sagittal otoliths. Opaque zones on otolith sections were annular, forming in March–July (peaking in May). Knobbed Porgy ranged from 1 to 21 years, and the largest fish measured 507 mm TL. Body size relationships relating TL, FL, and total body weight (W) for Knobbed Porgy were TL = 1.07·FL + 22.93 (n = 3,173; r² = 0.97), FL = 0.91·TL − 12.54 (n = 3,173; r² = 0.97), W = (1.38 × 10⁻⁵)TL^3.03 (n = 12,732; r² = 0.92), and W = (7.99 × 10⁻⁵)FL^2.79 (n = 3,199; r² = 0.90). Mean length at age was significantly different between Knobbed Porgy collected in North Carolina through southeast Florida (northern region) and those collected in the Florida Keys (southern region). The von Bertalanffy growth equations for Knobbed Porgy were L_t = 412[1 − e^{−0.20(t + 1.97)}] (n = 448) for all regions combined, L_t = 403[1 − e^{−0.38(t + 0.0001)}] (n = 117) for northern region fish, and L_t = 326[1 − e^{−0.42(t + 1.61)}] (n = 331) for southern region fish. Age‐varying estimates of natural mortality were 0.36–0.79 year⁻¹ (ages 2–21) for the northern region and 0.42–0.67 year⁻¹ (ages 1–12) for fish from the Florida Keys. Hydrated oocytes were present during February–April in macroscopically staged ovaries (n = 148) for fish from the Florida Keys, and gonadosomatic index data indicated that the month of peak spawning in females was April. The updated life history information should be useful to fishery managers in formulating effective management strategies.

中文翻译：

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美国东南部水域球形K肉的年龄，生长，自然死亡率和生殖季节性

在美国东南部的珊瑚礁鱼捕捞中，重要的次要物种有节有节的海豚Calamus nodosus，最近由于超出了海豚复杂的配额而被禁渔。使用切碎的 矢状耳石，将节制的豚鼠（n = 448）进行陈化。耳石段上的不透明带呈环形，形成于3月至7月（5月达到峰值）。球形Por鱼的生长时间为1到21岁，最大的鱼类为507毫米TL。瘤状猪的TL，FL和总体重（W）相关的体重关系为TL = 1.07·FL + 22.93（n  = 3,173;  r ²  = 0.97），FL = 0.91·TL − 12.54（n  = 3,173;  r ²  = 0.97），W  ＝（1.38×10 ^-5）TL ^3.03（n  ＝ 12,732；r ²  ＝ 0.92），并且W  ＝（7.99×10 ^-5）FL ^2.79（n  ＝ 3,199；r ²  ＝ 0.90）。在北卡罗来纳州到佛罗里达州东南部（北部地区）收集的诺伯特红gy鼠与在佛罗里达礁岛区（南部地区）收集的K头长尾gy之间的平均年龄显着不同。对瘤突芦鲷的贝塔朗菲生长方程分别为大号_吨 = 412 [1 -  ë ^{-0.20（吨 + 1.97）} ]（ñ  = 448）的所有区组合，大号 北部地区鱼类的_t  = 403 [1-  e ^{-0.38（t  + 0.0001）} ]（ n = 117），南部地区鱼类的L _t  = 326 [1-  e ^{-0.42（t  + 1.61）} ]（ n  = 331）鱼。北部地区的自然死亡率随年龄变化的估计值是0.36-0.79年^-1（2-21岁），佛罗里达州鱼类的自然死亡率是0.42-0.67年^-1（1-12岁）。在宏观分期的卵巢中，在2月至4月存在水合卵母细胞（ n = 148）来自佛罗里达群岛的鱼类，并且性腺体指数数据表明雌性产卵高峰月份是4月。更新后的生活史信息对于渔业管理者制定有效的管理策略应该是有用的。