Thermal dependence of embryonic growth and development in brown trout

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Fertilized eggs from a brown trout Salmo trutta population in northern Spain were incubated in the laboratory at 4, 6, 8, 10, 12, 14, 16 and 18° C. Developmental stage and embryo size were monitored by taking samples at regular intervals. Survival was maximal at 8 and 10° C and decreased at higher and lower temperatures. Despite starting development, no embryo hatched at 16 and 18° C, which suggests an upper thermal limit for development between 14 and 16° C. Time required to reach a given ontogenetic stage decreased with increasing temperature. Embryos incubated at lower temperatures were larger at 50% hatching, and these differences persisted throughout the subsequent embryonic period until the start of exogenous feeding. A comparison with previously published data indicates low interpopulation variability in thermal sensitivity of embryonic development, even in consideration of the great latitudinal range of the studies.

Keywords: developmental rate; endogenous feeding period; hatching; mortality; temperature; weighted degree-days

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1046/j.1095-8649.2003.00049.x

Affiliations: Departamento de Biología de Organismos y Sistemas, Universidad de Oviedo, Oviedo, Spain

Publication date: March 1, 2003

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more