Reproductive performance of the Mesa silverside (Chirostoma jordani Woolman, 1894) under natural and controlled photoperiods.
Biocell
; 36(3): 105-11, 2012 Dec.
Article
em En
| MEDLINE
| ID: mdl-23682425
Chirostoma jordani is a native annual species inhabiting lacustrine waters of the Central Mexico Plateau. It is widely distributed and is currently facing high environmental pressures. Five experiments were performed to study the reproductive performance of this species. Four of the experiments were conducted in 270-L indoor recirculation tanks. Two males and one female at the first stage of reproduction were included in each test. A photoperiod of 14 light hours and 10 dark hours was used. In a fifth experiment, 10 females and 15 males were kept in an outdoor 3,000-L recirculation tank under natural photoperiod. The number of spawns, fertilised eggs and 30-day-old juveniles were counted and the survival rate was calculated. The results indicated significant differences (P < 0.05) between treatments. Higher spawn numbers and greater egg production were observed under controlled photoperiod, and higher numbers of juveniles and a higher survival rate were observed under natural photoperiod. The trials exhibited different patterns of egg production during the experiment. The egg production in the natural-photoperiod trials followed a polynomial curve model. In contrast, the trials under the controlled photoperiod showed an irregular pattern of increases and decreases in egg production.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Reprodução
/
Peixes
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Animals
País/Região como assunto:
Mexico
Idioma:
En
Revista:
Biocell
Assunto da revista:
BIOLOGIA MOLECULAR
/
DIAGNOSTICO POR IMAGEM
/
HISTOCITOQUIMICA
Ano de publicação:
2012
Tipo de documento:
Article
País de publicação:
Estados Unidos