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Population Dynamics, Reproduction and Growth of Upogebia Pusilla (Decapoda, Thalassinidea) in the Evros Delta (North Aegean Sea)

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[Monthly samples of Upogebia pusilla were collected from February 1983 to February 1984 in an area of the Evros Delta located close to the sea, where salinity and temperature of the water ranged from 4 to 25% and 4.3° to 24.5°C, respectively. Population density and wet weight biomass varied greatly, being higher in summer. Young shrimps appeared in August and had a maximum life span of approximately three years. Ovigerous females were found from April to August. The frequency of females among the collected individuals was 0.393. The smallest ovigerous female had a total length (TL) of 39 mm, while the maximum TL for females was 82 mm and for males 106 mm. Growth in age classes I and II was greater in the period from July to August. Mean growth of carapace length (CL) was described by the Von Bertalanffy function. A positive correlation existed between total length and CL or wet weight (W)., Monthly samples of Upogebia pusilla were collected from February 1983 to February 1984 in an area of the Evros Delta located close to the sea, where salinity and temperature of the water ranged from 4 to 25% and 4.3° to 24.5°C, respectively. Population density and wet weight biomass varied greatly, being higher in summer. Young shrimps appeared in August and had a maximum life span of approximately three years. Ovigerous females were found from April to August. The frequency of females among the collected individuals was 0.393. The smallest ovigerous female had a total length (TL) of 39 mm, while the maximum TL for females was 82 mm and for males 106 mm. Growth in age classes I and II was greater in the period from July to August. Mean growth of carapace length (CL) was described by the Von Bertalanffy function. A positive correlation existed between total length and CL or wet weight (W).]

Affiliations: 1: ) Democritus University of Thrace, Department of Education-Primary level, GR-68100 Alexandroupolis, Greece; 2: ) Aristoteleio University of Thessaloniki, Department of Zoology, GR-54006 Thessaloniki, Greece

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/content/journals/10.1163/156854097x00249
1997-01-01
2016-12-04

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