Universidade Estadual do Norte Fluminense Darcy Ribeiro, Centro de Biociências e Biotecnologia, Laboratório de Ciências Ambientais, Av. Alberto Lamego, 2000, Parque Califórnia, 28013-602 Campos dos Goytacazes, RJ, Brazil.
An Acad Bras Cienc. 2022 Jan 10;94(1):e20201050. doi: 10.1590/0001-3765202220201050. eCollection 2022.
This study analyzes the influences of environmental variables on the weight-length relationship of the penaeid shrimp Xiphopenaeus kroyeri during nine consecutive years (2005 to 2013) in northern Rio de Janeiro State. The main questions raised are: i) Does species relative growth vary along time? and ii) How are the environmental variables sea surface temperature, salinity, chlorophyll-a and/or organic matter related to the relative growth? For males, the long-term mean of the allometric coefficient stayed <3 (immature: 2.49; mature: 2.91), whereas for females they were >3 (immature: 3.08; mature: 3.10). The sine-consine models highlighted the wave T period in which the allometric coefficient values complete one cycle of increase-decrease: 4.72 years and 14.72 years for immatures female and male, respectively; and 9.08 years and 9.98 years for matures male and females, respectively. The relative growth behavior varies in a predictable time scale; however, none of the environmental variables strongly supported the variation. Changes in the relative growth behavior are probably drive by intrinsic mechanisms to maintain the population locally.
本研究分析了 9 年来（2005 年至 2013 年）环境变量对里约热内卢州北部虾夷对虾 Xiphopenaeus kroyeri 体重-体长关系的影响。主要问题是：i）种间相对生长是否随时间变化？ii）环境变量海面温度、盐度、叶绿素-a 和/或有机物与相对生长有何关系？对于雄性，长期平均相对生长系数<3（未成熟：2.49；成熟：2.91），而对于雌性，长期平均相对生长系数>3（未成熟：3.08；成熟：3.10）。正弦余弦模型突出了相对生长系数值完成一个增加-减少周期的波 T 周期：雌性未成熟个体为 4.72 年，雄性未成熟个体为 14.72 年；成熟雌性个体为 9.08 年，成熟雄性个体为 9.98 年。相对生长行为在可预测的时间尺度上变化；然而，没有一个环境变量强烈支持这种变化。相对生长行为的变化可能是由内在机制驱动的，以维持局部种群。
