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- Title
Distribution and density of juvenile Acipenser persicus at the lower 10 meter depth of the southern Caspian Sea.
- Authors
Afraei, M.A.; Safari, R.; Salmani, A.
- Abstract
This study was carried out as part of the Caspian Sea Environmental programme (CEP). It was undertaken in parallel with studies of the adjacent countries in 2001. The aim of this investigation was to determine the frequency of occurrence of various sturgeon species and their distribution in different sea areas, particularly the juveniles down to a depth of 10m. The catch per unit effort (CPUE) in terms of numbers of fish in each night gill net was determined in 2001 at 10 stations along the southern shores of the Caspian Sea down to the 10m depth isoline. The CPUE values varied from 7 to 125 fish per net per night at different stations .Total and average CPUE over all stations and the entire investigational period were 51.4 and 34.8 for Acipenser persicus, respectively. The highest density of A. persicus occurred in the depth range near the 10 meter isoline or below. Average length and weight of A. persicus in these coastal habitats were 22.57 ± 4.29 cm and 79.4 ± 45.4 g in the coastal areas of the Mazandaran Province and 21.6 ± 1.4 cm and 48.5 ± 7.5 g in the coastal waters of the Golestan Province. The results demonstrate that density varies greatly and that during the observation period in 2001 the sampling stations 8 (Norsar) and 6 ( Izedeh) exhibited the highest and the lowest density and frequency (40.8% and 4%, repectively) compared to the average values of the study.
- Subjects
CASPIAN Sea; STURGEONS; FISH populations; FISH farming; ICHTHYOLOGY
- Publication
Journal of Applied Ichthyology, 2006, Vol 22, p108
- ISSN
0175-8659
- Publication type
Article
- DOI
10.1111/j.1439-0426.2007.00936.x