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Distribution, abundance and size composition of mullet populations in the Severn Estuary and Bristol Channel


Distribution, abundance and size composition of mullet populations in the Severn Estuary and Bristol Channel



Journal of the Marine Biological Association of the United Kingdom 652: 325-335



ISSN/ISBN: 0025-3154

DOI: 10.1017/s002531540005044x

Mullet were collected over several years in regular samples from Berkeley, Oldbury and Uskmouth in the Severn Estuary and from Hinkley Point and Minehead in the inner Bristol Channel, and also during 5 trips to Pembroke, Milford Haven, on the southwestern tip of Wales. The numbers of thin-lipped mullet, Liza ramada, were far greater in samples from the Severn Estuary and Bristol Channel than in Milford Haven, whereas the reverse was true for thick-lipped mullet, Chelon labrosus. Golden mullet, L. aurata, was only found in Milford Haven. The estimated spawning time of the L. ramada population that gave rise to the individuals found in the estuary was between April and June. While there was great variation in the numbers of L. ramada entering the estuary in different years, peak abundnace was always reached in Oct. or Nov. Growth of L. ramada was slow, with mean standard lengths of only 55-58 mm being attained after appr. 10-12 mo. In general, the 0+ age class was the most abundant but considerable numbers of 1+ and occasionaly 2+ individuals were also collected. The data indicate that L. ramada tends to move out into deeper water as it increases in size.

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Accession: 017861060

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Related references

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