TY - JOUR
T1 - Environmental factors controlling crayfish Procambarus clarkii activity in the Donana National Park freshwater marsh (SW-Spain)
AU - Joaquín Gutiérrez-Yurrita, Pedro
AU - Montes, Carlos
N1 - Funding Information:
Authors wish to thank Estación Biológica de Doñana, CSIC (Sevilla) and Patronato del Parque Nacional de Doñana for permitting us to develop the field work in Doñana National Park. Pedro Joaquı́n Gutiérrez-Yurrita also thanks the ICI (Spain) for a subvention grant and CONACyT (México) for a financial complement of the former grant that enabled him to complete his PhD Dissertation. Authors wish also to thank to Dr Elena Escudero, Dr Alicia Batuecas (Departmento de Fisiologı́a U.A.M., Spain), Dr Alberto Huberman (Inst. Nacional de la Nutrición Salvador Zubirán, México), and one anonymous referee for their suggestions to the manuscript. We also thank to Biol. Arantxa López and Biol. Beatriz Beroiz for their invaluable help in the field works.
PY - 1998/7
Y1 - 1998/7
N2 - We investigated how environmental factors control crayfish (Procambarus clarkii) activity in Donana National Park freshwater marsh where this species was introduced in 1974. In order to extrapolate data to different ecosystems of the freshwater marsh, a pond called Lucio El Palacio was used as an experimental site and flooded artificially to simulate natural different flooding patterns of the freshwater marsh. Measurements were taken in situ during 24 h while also recording habitat conditions. We measured crayfish Q(o)2 (mg g-1 h-1), reproductive stage, sex and stomach filling content, and habitat d(o)2, and temperature. There were no significant differences in activity patterns of crayfish between different hydrological conditions, but there were differences in levels of oxygen consumption (P > 0.05). Photoperiod and oxygen availability had a large effect on activity, with the highest levels of oxygen consumption occurring at nightfall. P. clarkii act as oxygen-conformer species until O2 availability in medium was 5 mg 1-1 ; when O2 availability is higher than 5 mg 1-1 , animals behave like oxygen- regulator species. Mature animals had higher metabolic rates than immatures. Males were more active than females. The effect of temperature is confounded with that of time and does not seem to be important since its variations within each season is very low and does not reach the physiological extremes of this species.
AB - We investigated how environmental factors control crayfish (Procambarus clarkii) activity in Donana National Park freshwater marsh where this species was introduced in 1974. In order to extrapolate data to different ecosystems of the freshwater marsh, a pond called Lucio El Palacio was used as an experimental site and flooded artificially to simulate natural different flooding patterns of the freshwater marsh. Measurements were taken in situ during 24 h while also recording habitat conditions. We measured crayfish Q(o)2 (mg g-1 h-1), reproductive stage, sex and stomach filling content, and habitat d(o)2, and temperature. There were no significant differences in activity patterns of crayfish between different hydrological conditions, but there were differences in levels of oxygen consumption (P > 0.05). Photoperiod and oxygen availability had a large effect on activity, with the highest levels of oxygen consumption occurring at nightfall. P. clarkii act as oxygen-conformer species until O2 availability in medium was 5 mg 1-1 ; when O2 availability is higher than 5 mg 1-1 , animals behave like oxygen- regulator species. Mature animals had higher metabolic rates than immatures. Males were more active than females. The effect of temperature is confounded with that of time and does not seem to be important since its variations within each season is very low and does not reach the physiological extremes of this species.
UR - http://www.scopus.com/inward/record.url?scp=0345214527&partnerID=8YFLogxK
U2 - 10.1016/S1095-6433(98)10091-0
DO - 10.1016/S1095-6433(98)10091-0
M3 - Artículo
SN - 1095-6433
VL - 120
SP - 713
EP - 721
JO - Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
JF - Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
IS - 4
ER -