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REARING OF JUVENILE DARK CRABS, CALLINECTES RATHBUNAE CONTRERAS, 1930, UNDER LABORATORY CONDITIONS BY SERGIO CHÁZARO-OLVERA 1,2 ) , HORACIO VÁZQUEZ-LÓPEZ 1,3 ) and ANGEL MORÁN-SILVA 1,4 ) 1 ) Laboratorio de Ecología de Crustáceos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Apartado Postal 314, Tlalnepantla, Estado de México, C.P. 54090, Mexico ABSTRACT In the present study, we reared juvenile dark crabs, Callinectes rathbunae under laboratory conditions. We determined growth rate, increase in carapace width, moult consumption, regeneration of appendages, and survival. The crabs were collected in March 2004 from the Alvarado Lagoon System in the state of Veracruz, Mexico. Crabs were transported to the laboratory and acclimated to 5 and 15 psu and a temperature of 25 ± 1 ◦ C. Growth rate was determined by the difference in size at the time interval between the pre-moult and moult stages. Survival was assessed by counting the juvenile crabs during rearing, moult consumption was determined after 24 hours, and regeneration of appendages at the next moult. The size of juveniles ranged from 1.7 to 6.4 cm. Results revealed that carapace increase was greater at 15 psu, being 35.29% for the 1.7-2.8 cm size range. The mean growth
Crustaceana – Brill
Published: Jan 1, 2007
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