Abundance and distribution of short-lived species like Octopus cyanea depends on favorable environmental conditions, which are essential for growth and successful recruitment. However, the influence of environmental variables on the abundance and distribution of O. cyanea remains unknown, particularly in the Western Indian Ocean (WIO) region, despite its importance as a fishery resource. This study investigated the role of environmental variables (sea surface temperature [SST], chlorophyll-a [Chl-a], rainfall and wind) on the abundance and temporal distribution of O. cyanea around Mafia Island in Tanzania for a period of 60 months (2013–2017). Octopus catch data were obtained from TANPESCA fish processing factory, while environmental data were obtained from the National Aeronautics and Space Administration - NASA satellite (SST and Chl-a) and the Tanzania Meteorological Agency - TMA (rainfall and wind). The results for the O. cyanea CPUE showed two peaks, between March and October, suggesting successful recruitment and stable environmental conditions during these periods. The additive effect of wind speed and Chl-a with a 4-month lag, was the best model for predicting the abundance and temporal distribution of O. cyanea around Mafia Island followed by the additive effect of SST, wind and Chl-a. Temperature influences octopus growth, while strong wind facilitates the mixing of water, which brings the bottom nutrient rich water to the euphotic zone for increased photosynthesis. In conclusion, the abundance and temporal distribution of O. cyanea are influenced by the additive effect of wind, Chl-a and SST with time-lagged effect of four months. This study recommends seasonal closure of the octopus fishery between April and July and reopening in March and October for sustainable harvesting of this valuable resource.

诸如章鱼等短命物种的丰度和分布取决于有利的环境条件，这对于生长和成功募集至关重要。但是，尽管环境变量作为渔业资源非常重要，但环境变量对蓝藻的数量和分布的影响仍然未知，特别是在西印度洋（WIO）地区。这项研究调查的环境变量的作用（海面温度SST]，受叶绿素一[Chl-一]，降雨和风）上的丰度和时间分布O.霞在坦桑尼亚的黑手党岛附近度过了60个月（2013-2017年）。章鱼的捕捞数据是从TANPESCA鱼加工厂获得的，而环境数据是从美国国家航空航天局的NASA卫星（SST和Chl- a）和坦桑尼亚气象局的TMA（降雨和风力）获得的。对于结果O.霞CPUE呈双峰，三月和十月之间，在这些时期提示成功的招聘和稳定的环境条件。风速和Chl-的加性效应一带有4个月的滞后，是预测的丰度和时空分布的最佳模型O.霞其次是SST，风和Chl-的累加效应围绕马菲亚岛一个。温度影响章鱼的生长，而强风有利于水的混合，这会将底部营养丰富的水带到富营养区，以提高光合作用。总之，风，叶绿素a和SST的加性效应和四个月的时滞效应影响了蓝藻的丰度和时间分布。这项研究建议在四月和七月之间季节性关闭章鱼捕捞活动，并在三月和十月重新开放章鱼捕捞活动，以可持续地捕捞这种宝贵资源。