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The spiny lobster Panulirus homarus is widely distributed in the Indo-West Pacific. Along  the coast of Oman it supports an artisanal fishery using traps and tangle nets. The egg-bearing incidence of females  caught between 1989 and 2006 were analysed relative to month, lobster size and location of capture.  The smallest female with external eggs had a carapace length (CL) of 54.6 mm, but only 9–18% of females of 60–69 mm CL carried eggs. This percentage increased significantly above 70 mm CL, and on average, 63% of individuals >90 mm carried eggs. Egg-bearing increased seasonally at the onset of the SW monsoon in May and June, when wind-driven upwelling reduces inshore water temperatures and increases primary productivity. The reproductive season extended over a 9-month period up to  January, with a pause in February to April. No geographical gradient in egg-bearing seasonality was  observed. The prolonged breeding season with multiple broods in large females conforms with the  typical pattern of tropical palinurids. The 2-month open fishing season ( 15th October  to 15th December) falls within the breeding season, and may be more optimally placed in February to April.

Reproductive Season of the Scalloped Spiny Lobster Panulirus homarus Along the Coast of Oman: Management Implications