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Stomach Repletion Rhythms of the Caridean Shrimps, Macrobrachium americanum and M. tenellum (Crustacea: Decapoda) in a Caged-Pond System

Stomach Repletion Rhythms of the Caridean Shrimps, Macrobrachium americanum and M. tenellum (Crustacea: Decapoda) in a Caged-Pond System

Fermín Lopez-Uriostegui1, Jesús T. Ponce-Palafox2,*, Fabiola Lango-Reynoso1, María del Refugio Castañeda-Chavez1, Virgilio Eugenio Arenas-Fuentes3 and Fernando Vega-Villasante4

1Posgrado en Ciencias en Acuacultura, Instituto Tecnológico de Boca del Río, Veracruz, C.P. 94290.
2Lab. de Bioingeniería Costera, Escuela Nacional de Ingeniería Pesquera, Unidad Multidisciplinaria de Bahía de Banderas, Universidad Autónoma de Nayarit, Nayarit, México C.P. 63155. 
3Instituto de Ciencias Marinas y Pesquerías, Universidad Veracruzana, Boca del Río, Veracruz, México C.P. 94290.
4 Laboratorio de Calidad de Agua y Acuicultura Experimental, Universidad de Guadalajara, Puerto Vallarta Jalisco, México.

*        Corresponding author: jesus.ponce@usa.net

ABSTRACT

The stomach repletion rhythms of the caridean shrimp M. americanum and M. tenellum in caged-pond system were studied. A total of 120 caridean shrimp (60 M. americanum and 60 M. tenellum) had their stomach repletion analysis. Samples were taken four-hly over a 24 h cycle. In general it was found that stomach repletion index showed both species feed 24 h, but forage activity differs in intensity in the two species. In M. tenellum repletion index was greatest during the day and M. americanum in the night.
 

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Pakistan Journal of Zoology (Associated Journals)

December

Vol. 49, Iss. 6, Pages 1937-2341

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