Effect of bilateral eyestalk ablation on the heart rate of the crab Chasmagnathus granulata dana, 1851 (crustacea - decapoda)
Braz. j. med. biol. res
; 24(11): 1141-7, 1991. ilus, tab
Article
em En
| LILACS
| ID: lil-105495
Biblioteca responsável:
BR1.1
ABSTRACT
1. We have studied the effect og bilateral eyestalk ablation on the heart rate (HR) of a crab. Recordings of the heart rate of normal and eyestalkless Chasmagnathus granulata, a meso-supralittoral crab from southern Brazil, were obtained starting 1 h after electrode implantation for 44 and 144h, respectively. 2. The time required for HR stabilization was 24h fro normal animals and 7 h for eyestalkless animals. The effect of electrode implantation varied significantly with wet body weight (P < 0.05). Smaller animals were more affected by the procedure (higher initial HR), although they recovered more rapidly. 3. Stabilized HR values (means ñ SD) were significantly higher (P < 0.001) in eyestalkless animals (95.8) ñ 36.8 beats/min vs 69.5 ñ 32.8 beats/min for normal animals). 4. These data demostrate that bilateal eyestalk ablation causes an increase in HR. The mechanism of the effect, i.e., hormnonal and/or neural, is not know
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Índice:
LILACS
Assunto principal:
Braquiúros
/
Olho
/
Frequência Cardíaca
Limite:
Animals
Idioma:
En
Revista:
Braz. j. med. biol. res
Assunto da revista:
BIOLOGIA
/
MEDICINA
Ano de publicação:
1991
Tipo de documento:
Article