Garcia, S. (1972) Biologie de Penaeus duorarum (Burkenroad) en Côte d'Ivoire: 2 - ponte et migration. Documents Scientifiques, Centre de Recherches Océanographiques, Abidjan, 3(1), pp. 19-45.
The pink shrimp Penaeus duorarum spawns from 25 to 60m, mostly in summer (October to June). Size at first sexual maturity is 31 mm (carapace length). The observed difference with the Caribbean pink shrimp is analysed. Immature shrimps migrate all year round but a peak migration occurs from January to March (in summer) and is associated with maximum salinities. A secondary peak migration occurs in October corresponding to minimum salinity and maximum river discharge. The action of salinity on migration is discussed and a preponderant action of currents in the process is also suggested. Migration is also related to moon phase, tide and day-night cycles. Migration intensity as expressed by catch per unit of effort is maximum at night, during ebb tide, on new and full moon. Seasonal variation of mean migration size and abundance are related by a negative linear correlation on a logarithmic plot (R = 0.776). This phenomenon is perhaps related to competition for food.
|Item Type: ||Article|
|Title: ||Biologie de Penaeus duorarum (Burkenroad) en Côte d'Ivoire: 2 - ponte et migration|
|Personal Creator/Author: |
|Journal or Publication Title: ||Documents Scientifiques, Centre de Recherches Océanographiques, Abidjan|
|Page Range: ||pp. 19-45|
|Date: ||February 1972|
|Issuing Agency: ||Centre de Recherches Océanographiques, Côte d'Ivoire|
|Uncontrolled Keywords: ||Côte d'Ivoire; Penaeus duorarum; Northern pink shrimp; spawning; migration; seasonal variations; salinity; currents|
|Item ID: ||8519|
|Depositing User: ||Mr Luigi Baldassari|
|Date Deposited: ||14 Mar 2012 09:33|
|Last Modified: ||14 Mar 2012 09:33|
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