Regional and seasonal variation in red sea urchin fishing.

Regional and seasonal variation in commercial fishing effort and landings (CDFW) from the three western subregions within the Channel Islands (2009–2011): total effort (number of receipts) and total landings (kg) across two red sea urchin gonadosomatic index (GSI) seasons (months of lowest [trough: April through June] and highest [peak: September through December]). (a) Two-way ANOVA results and (b) post hoc Student’s t-tests. Levels not connected by the same letter are significantly different. Least square (LS) means and standard error (SE) are displayed. Highest GSI season per region are highlighted in gray for ease of comparison.2009—2011年海峡群岛西部三个子区域的商业捕捞作业强度与渔获上岸量（CDFW）的区域与季节变化：涵盖两个基于红海胆生殖腺指数（gonadosomatic index，GSI）划分的捕捞季节的总作业强度（以捕捞收据数量计）与总渔获上岸量（千克），其中最低值期为4月至6月（低谷期），最高值期为9月至12月（高峰期）。(a) 双因素方差分析（two-way ANOVA）结果与(b) 事后Student t检验结果。未标注相同字母的组间差异显著。图中已展示最小二乘（LS）均值与标准误（SE）。为便于对比，各区域的最高GSI值季节均以灰色高亮标注。