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Production of juvenile barber goby Elacatinus figaro in captivity: developing technology to reduce fishing pressure on an endangered species

Published online by Cambridge University Press:  27 May 2010

Marcelo Roberto Pereira Shei ,
Kleber Campos Miranda-Filho ,
Ricardo Vieira Rodrigues  and
Luís André Sampaio
Marcelo Roberto Pereira Shei*
Affiliation:
Universidade Federal do Rio Grande, Instituto de Oceanografia, Laboratório de Piscicultura Marinha, Rio Grande-RS, CP 474, Brasil, CEP 96201-900, Brazil
Kleber Campos Miranda-Filho
Affiliation:
Universidade Federal do Rio Grande, Instituto de Oceanografia, Laboratório de Piscicultura Marinha, Rio Grande-RS, CP 474, Brasil, CEP 96201-900, Brazil
Ricardo Vieira Rodrigues
Affiliation:
Universidade Federal do Rio Grande, Instituto de Oceanografia, Laboratório de Piscicultura Marinha, Rio Grande-RS, CP 474, Brasil, CEP 96201-900, Brazil
Luís André Sampaio
Affiliation:
Universidade Federal do Rio Grande, Instituto de Oceanografia, Laboratório de Piscicultura Marinha, Rio Grande-RS, CP 474, Brasil, CEP 96201-900, Brazil
*
Correspondence should be addressed to: M.R.P. Shei, Universidade Federal do Rio Grande, Instituto de Oceanografia, Laboratório de Piscicultura Marinha, Rio Grande-RS, CP 474, Brasil, CEP 96201-900, Brazil email: [email protected]
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Abstract

The barber goby Elacatinus figaro, native to the Brazilian Atlantic coast, is endangered due to over-exploitation by the ornamental industry. It is expected that once the technology for juvenile production is mastered, one could reduce fishing pressure by commercializing fish raised in captivity and stocking enhancement programmes can be established. This work was carried out in order to describe natural breeding, embryonic development and larviculture of barber goby in the laboratory. The first spawning was observed 24 days after the pairs were formed, thereafter barber goby spawned every 8 to 10 days at 26°C. Fecundity ranged from 430 to 1020 eggs per clutch with average hatching rate of 69 ± 16%. Fertilized eggs are elliptical in shape and present adhesive filaments at the proximal end and five protuberances at the distal end. Egg length averaged 1.81 ± 0.1 mm and mean width was 0.61 ± 0.03 mm. The embryonic developmental period lasted 7 days and newly hatched larvae measured 3.15 ± 0.07 mm, showing positive phototaxis. Larvae were fed with rotifers Brachionus plicatilis in green water culture along with the microalgae Nannochloropsis oculata from 1 to 20 days after hatching (DAH). Artemia nauplii were added to the diet 15 DAH, and 5 days later rotifers were no longer offered. The results of the present study demonstrate the viability to produce naturally spawned eggs of the barber goby E. figaro in captivity. Larvae settle to the bottom 28 to 35 DAH, when total length was equal to 8.5 mm in average.

Keywords

marine ornamentalreproductionreef fishearly developmentendangered species
Type
Research Article
Information
Marine Biodiversity Records , Volume 3 , June 2010 , e57
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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