Significance of Temperature to Larval Survival and Length of Development in Balanus ebumeus (Crustacea: Cirripedia)

Abstract

Mortality and length of development of Balanus eburneus nauplii is modifled in laboratory culture by both temperature and concentration of unicellular algal food. At 20 and 25°C mean larval survival was 63.5 % and 66.0 %, respectively, at an algal concentration of 1 X 10' cells ml-l. When the algal concentration was doubled to 2 X 105 cells ml-' mean survival increased significantly to 92.5 and 96.5 % at 20 and 25 'C, respectively (p = 0.002 at both temperatures). At 30°C the difference in mortality related to algal food concentration disappeared and mean survival was above 90 % at both concentrations. Over the interval of 20 to 30°C, time to complete development to the cyprid stage decreased from a median of 7.6 to 3.9 d at 2 X 105 cells ml-' and from 10.8 to 3.9 d at the lower food level of 1 X 105 cells ml-l. At 30°C there was no difference between the 2 food concentrations in the median time to reach the cyprid stage. The hypothesis is proposed that increased algal cell concentration at 20 and 25°C compensates for lower feeding efficiency and consequently results in better survival. To account for the similarity in development time at 30°C at either food concentration, it is proposed that maximum possible food intake at 30°C is already attained at 1 X 105 cells ml-' and that therefore increase in the number of algal cells will not further affect development rate to the cyprid stage. Experiments on feeding efficiency of B eburneus nauplii in relation to temperature will be needed to test this hypothesis.

Being young in a changing world: how temperature and salinity changes interactively modify the performance of larval stages of the barnacle Amphibalanus improvisus

“…Similar results have previously been observed for Amphibalanus amphitrite (Anil et al 1995(Anil et al , 2001Qiu and Qian 1999), B. trigonus (Thiyagarajan et al 2003a, b), A. eburneus (Scheltema and Williams 1982), Elminius modestus (Harms 1984(Harms , 1986, and Semibalanus balanoides (Harms 1984). Independently of salinity, larval duration was accelerated by 1.2 days per °C of warming (R 2 = 0.75 and 0.96 for 15 and 5 psu, resp.).…”

Patterns and processes of compositional change in a California epibenthic community

“…often constitute a 'black box' in this and other systems. Temperature can affect recruitment through direct effects on adult fecundity (Yund & Stires 2002), larval development (Berrill 1935, Scheltema & Williams 1982, spawning (Davis 1989), and/or larval survival (Scheltema & Williams 1982), but we have no evidence to assess which of these underlie the temperaturerecruitment link we observed. Additionally, due to scaling of reproductive output with body size, a positive relationship of temperature with other demographic rates (i.e.…”

Larval development of the intertidal barnacles Chthamalus stellatus and Chthamalus montagui

“…Duration in cultures is a¡ected by food (Moyse, 1963;Lang, 1976Lang, , 1979Lang & Marcy, 1982) and temperature (Scheltema & Williams, 1982;West, 1982). The lack of e¡ects of temperature on duration in this study probably re£ects the narrow range of temperatures used.…”