Egg production of the burrowing shrimp Callichirus
seilacheri (Bott 1955) (Decapoda, Callianassidae) in northern Chile |
| |
Authors: | Patricio Hernáez Sergio Palma Ingo S Wehrtmann |
| |
Institution: | (1) Museo del Mar, Universidad Arturo Prat, Casilla 121, Iquique, Chile;(2) Escuela de Ciencias del Mar, Pontificia Universidad Católica de Valparaíso, Casilla 1020, Valparaíso, Chile;(3) Unidad de Investigación Pesquera y Acuicultura (UNIP) of the Centro de Investigaciones en Ciencias del Mar y Limnología (CIMAR), Universidad de Costa Rica, 2060 San José, Costa Rica |
| |
Abstract: | The thalassinidean shrimp Callichirus seilacheri is a common species in the intertidal zone of the South American Pacific coast. However, our knowledge of its reproductive
ecology is rather limited. The present study was carried out between January and December 2003 at Las Machas, northern Chile.
Although ovigerous females were encountered almost throughout the study period, they were particularly abundant between May
and September when water temperatures were lowest and sediment coverage of the burrow entrances was highest. Females of C. seilacheri produced numerous (17,450 ± 3,796 eggs) and small (0.884 ± 0.080 mm; 0.262 ± 0.054 mm3) eggs when compared to other thalassinidean shrimps for which such information is available. Fecundity was positively correlated
with female size; however, correlations were allometric, which might be related to the elasticity of the abdomen. Egg volume
increased by 41.2% during embryogenesis, and egg loss during the incubation period was on average 8%. Females inverted on
average 14.9% of their dry weight into egg production. |
| |
Keywords: | Fecundity Reproductive output Accretion Callianassidae Northern Chile Egg loss |
本文献已被 SpringerLink 等数据库收录! |
|