Age and Growth of a Subtropical Marsh Fish: The Gulf Killifish, Fundulus grandis

In an attempt to constrain growth rates and develop better methods for aging Gulf Killifish, Fundulus grandis, several efforts were made, beginning in November of 2013, to capture individuals with minnow traps in two marsh pools near the LUMCON field station in Chauvin, LA. Over 800 individuals have been captured, measured, tagged with small coded wire tags, and immersed in oxytetracycline (OTC) to mark otoliths with a fluorescent ring for aging purposes. These individuals have been released and efforts have been made to recapture tagged individuals (94 recaptured thus far). Data collection is ongoing, including initial and final length (to calculate growth per time released), date tagged and date recaptured, otolith measurements (amount of otolith accreted since OTC marking, overall otolith size, etc.), catch per unit effort, sex, and location released and recaptured.

为了控制海湾鳉（Gulf Killifish，学名Fundulus grandis）的生长速率并开发更优的年龄鉴定方法，自2013年11月起，研究人员在路易斯安那州肖万市LUMCON野外站附近的两个沼泽池内，多次使用小鱼陷阱（minnow trap）捕获该鱼种个体。目前已捕获800余尾个体，对其进行测量后，使用小型编码线标签（coded wire tag）标记，并将其浸泡在土霉素（oxytetracycline，OTC）中，以在耳石（otolith）上形成荧光环，用于年龄鉴定。这些个体已被放归，且研究人员持续开展标记个体的重捕工作（截至目前已重捕94尾）。数据收集工作仍在进行中，涵盖初始与最终体长（用于计算放归后的单位时间生长量）、标记日期与重捕日期、耳石测量数据（包括OTC标记后耳石的新增量、耳石总体大小等）、单位捕捞努力量（catch per unit effort）、性别，以及放归与重捕地点等信息。