Impacts of ocean acidification on sperm develop with exposure time for a polychaete with long lived sperm.
Mar Environ Res
; 129: 268-276, 2017 Aug.
Article
en En
| MEDLINE
| ID: mdl-28648827
ABSTRACT
The majority of marine invertebrate species release eggs and sperm into seawater for external fertilisation. Seawater conditions are currently changing at an unprecedented rate as a consequence of ocean acidification (OA). Sperm are thought to be particularly vulnerable to these changes and may be exposed to external environmental conditions for variable periods of time between spawning and fertilisation. Here, we undertook a mechanistic investigation of sperm swimming performance in the coastal polychaete Arenicola marina during an extended exposure to OA conditions (pHNBS 7.77, 1000 µatm pCO2). We found that key fitness-related aspects of sperm functioning declined faster under OA conditions i.e. impacts became apparent with exposure time. Sperm swimming speed (VCL), the number of motile sperm and sperm path linearity all dropped significantly after 4 h under OA conditions whilst remaining constant under ambient conditions at this time point. Our results highlight the importance of sperm exposure duration in ocean acidification experiments and may help towards explaining species specific differences in response.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Poliquetos
/
Agua de Mar
/
Espermatozoides
/
Contaminantes Químicos del Agua
/
Dióxido de Carbono
Límite:
Animals
Idioma:
En
Revista:
Mar Environ Res
Asunto de la revista:
BIOLOGIA
/
SAUDE AMBIENTAL
/
TOXICOLOGIA
Año:
2017
Tipo del documento:
Article
País de afiliación:
Reino Unido