Overview of goby-fry fisheries
1999
Bell, K.N.T. (J.L.B. Smith Inst. Ichthyology, Private Bag 1015, Grahamstown, 6140 (South Africa))
A number of diadromous gobies, notably Sicydium spp. and Sicyopterus spp., support fisheries based on return migrations of postlarvae (fry) to rivers. Most species are t ropical, although close relatives occur in Japan. The life-history of this group has often been incorrectly described as catadromous (spawning in the sea or estuary), whereas anadromous (spawning in rivers) would be more accurate. Among species, postlarvae range in length from 12 to 30 mm. Postlarvae have often been mistakenly described as new species because adult characters are absent. Most fisheries are in areas of volcanic habitat with high rainfall, torrential streams and high rates of disturbance. Even though some fisheries have been large, almost no historical information on yields exists and, at present, catch data are not regularly collected anywhere. This is a major obstacle in monitoring these fisheries, assessing reports of declining yields and relating them to trends in other variables
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