Growth, reproduction and feeding behavior of the planktonic shrimp, Lucifer faxoni Borradaile, off the Texas coast |
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| Authors: | Lee Wen Y; Omori Makoto; Peck Robert W |
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| Institution: | Marine Science Institute, The University of Texas at Austin Port Aransas, TX 78373, USA
1Present address: Resource Protection Division, Texas Parks and Wildlife Department 4200 Smith School Rd, Austin, TX 78744, USA
2Department of Aquatic Biosciences, Tokyo University of Fisheries 4-5-7 Konan, Minato-ku, Tokyo, 108 Japan
3Department of Zoology, 2538 The Mall, University of Hawaii Honolulu, HI 96822, USA |
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| Abstract: | The planktonic shrimp, Lucifer faxoni, lives to an age of  30–40days off the Texas coast. In the laboratory, the shrimp took28.9 and 18.9 days to reach sexual maturity at 22 and 30°Crespectively. Oviposition was observed at night between 20.00and 23.00. Females attach eggs to the 3rd pereiopods and broodthem until the nauplii emerge. Multiple broods are produced,giving a maximal lifetime fecundity of >140 eggs per female.In addition, females may also be able to synchronize the timeof their hatching to occur at night, perhaps to further reducemortality due to predation and cannibalism. A rapid turnoverof generations, each with a short adult lifespan, sequentialspawnings, and protection of eggs until hatching, characterizesthe life strategy of this small shrimp. Adult L.faxoni are carnivorous.However, their feeding appendages do not exclude the possibilityof omnivory. The maximal, dry-weight-based, specific ingestionrate was 0.7 day–1. Feeding activity was not affectedby either time of day or light regime. |
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