Oogenesis and fecundity of haddock (Melanogrammus aeglefinus L.) from the Nova Scotia shelf

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Abstract
Reproductive biology of haddock ( Melanogrammus aeglefinus L.) from the Nova Scotia shelf was investigated, including size at maturity, gonadal development, and oocyte size distribution at different stages of maturity. Gonad development reaches a maximum in February and March, with peak spawning occurring between March and May. The gonadosomatic index reaches a maximum of between 10 and 15% of body weight in mature fish. The minimum diameters of oocytes that would be spawned in the current year were identified as 0.212 mm and 0.155 mm for “ripe” and “almost ripe” fish. All oocytes spawned by “running ripe” fish were over 0.250 mm in diameter. The relationship between number of oocytes to be spawned in the current year and fish length was determined as: number of oocytes = 962.64 × FL 1.64 , where FL is fork length in cm. The equivalent relationship between total number of oocytes (> 0.1 mm in diameter) and fish length was: number of oocytes = 119.51 × FL 2–30 .

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