Evidence of euryhalinity of the gulf corvina (Cynoscion othonopterus)

Title:

Evidence of euryhalinity of the gulf corvina (Cynoscion othonopterus)

Creator:

Perez-Velazquez, M., Urquidez-Bejarano, P., González-Félix, M. L., and Minjarez-Osorio, C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a4ef444c-85d1-42e9-92b0-654bf177a2c9
uuid:a4ef444c-85d1-42e9-92b0-654bf177a2c9
issn:0862-8408

Subject:

Fyziologie člověka a srovnávací fyziologie, životní prostředí, fyziologie, environment, physiology, salinity, osmolality, euryhaline, cynoscion othonopterus, 14, and 612

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

The effects of environmental salinity on physiological responses, growth, and survival of the Gulf corvina, C. othonopterus, were evaluated in a 6-week completely randomized design experiment. Corvina (17.2±2.3 g mean initial body weight) were subjected to salinities of 5, 15, 25, and 35 ‰ and fed a commercial feed with protein and lipid contents of 46 and 14 %, respectively. Plasma osmolality increased significantly with salinity, ranging from 335.1±5.3 mOsm/kg in fish maintained at 5 ‰, to 354.8±6.8 mOsm/kg in fish kept in seawater, while a significant inverse relationship was observed between salinity and moisture content of whole fish, ranging from 73.8±0.7 (measured at 5 ‰) to 76.9±1.0 % (measured at 35 ‰). In spite of this, growth indices (final weight, weight gain, specific growth rate, condition factor, survival) were not altered, suggesting that, like other members of the family Sciaenidae, the Gulf corvina is a strong osmoregulator. The isosmotic point for this species was estimated to correspond to a salinity of 9.8 ‰. The present study represents the first set of experimental data on salinity tolerance of C. othonopterus and confirms the euryhalinity of this species., M. Perez-Velazquez, P. Urquidez-Bejarano, M. L. González-Félix, C. Minjarez-Osorio., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2014 Volume:63 | Number:5

Harvested from:

CDK

Metadata only:

false