The landings of Indian oil sardine (Sardinella longiceps, Clupeidae) along the south‐eastern Arabian Sea are about 43.8% of total Indian oil sardine production. The annual landings of this species exhibit large‐scale variability with prolonged years of surplus or deficit landings without identified reason. Evaluating Indian oil sardine landings along the Kerala coast during 1961–2017 in relation to environmental variations, we have elucidated a putative link between variability in landings versus environmental parameters and climate indices. The variables examined in this study, such as salinity and temperature along with physical indices such as upwelling and mixed layer depth (MLD) of the ocean help to propose a mechanism to temporal variability in the landings of Indian oil sardine. Colder temperature and timely intense upwelling lead to nutrient enrichment in the surface water, which promotes the growth of phytoplankton (chl‐a) and thereby food availability to Indian oil sardine are found during years with surplus catch. Less saline surface waters and shoaling of MLD at these times could lead to the aggregation of fish at particular depths and thereby a good catches. The reverse mechanism, such as more surface saline water, warm temperature, downwelling or weak upwelling, and less nutrient enrichment, leads to deficit landings. Further, it was noticed that the Pacific decadal oscillation and Atlantic multidecadal oscillation have a more pronounced impact on Indian oil sardine landings over the coast of south‐eastern Arabian Sea than previously reported ENSO associated impacts. All these point towards climate change implications for the Indian oil sardine fishery.

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气候对阿拉伯东南海印度沙丁鱼降落的影响

印度沙丁鱼油（沙丁鱼长ic（Clupeidae，Clupeidae）约占印度石油沙丁鱼总产量的43.8％。该物种的年度着陆表现出大范围的变异性，而长期的过剩或不足着陆时间却没有确定的原因。通过评估1961-2017年印度喀拉拉邦沿海沿岸的沙丁鱼石油上岸量与环境变化的关系，我们阐明了上岸量变化与环境参数和气候指数之间的推定联系。在这项研究中检查的变量，例如盐度和温度以及物理指标（例如海洋的上升流和混合层深度（MLD））有助于为印度沙丁鱼上岸的时间变化提出机制。较低的温度和及时的强烈上升流导致地表水中养分富集，a）从而在多年捕捞量过剩的情况下发现了印度沙丁鱼的粮食可供量。在这些时候，较少的盐水表面水和MLD的浅滩可能会导致特定深度的鱼聚集，从而导致良好的捕获。相反的机制，例如更多的地表盐水，温暖的温度，向下流或弱向上流以及较少的养分富集，将导致赤字着陆。此外，还注意到，太平洋年代际震荡和大西洋多年代际震荡对印度东南阿拉伯海沿岸的沙丁鱼石油着陆的影响要比先前报道的ENSO相关影响更为明显。所有这些都表明气候变化对印度石油沙丁鱼渔业的影响。