Relationship Between Water Temperature and Immune Response of Grass Carp (Ctenopharyngodon idellus C. et V.)

Abstract

The relationship between immune response of grass carp (Ctenopharygodon idellus) and water temperature was investigated according to changes in antiserum neutralization titer (ANT) and percent relative protection (PRP) of fish immunized with killed cell-cultured vaccine against Fish Reovirus (Vaccine CFRV). Experimental results showed that: 1) the water temperature of 10°C is the critical point in the immunization of grass carp with Vaccine CFRV; 2) the immune response was inhibited below 10°C and enhanced with in­crease in water temperature up to 32°C, after which it decreased; and 3) water tempera­ture at the inductive phase was one of the key factors that determined the occurrence and strength of the immune response.

Physiological Cycle of Adult Females and the Sex Identification of Juveniles in Hainan Gibbons: A Preliminary Study

“…The serum lysozyme activity of Hippoglossus hippoglossus L. increased with rising temperature, but the activity decreased after the critical high temperature of 30°C (Langston et al, 2002). The immune response is suppressed remarkably at the temperature exceeds the appropriate survival temperature in grass carp (Yang and Zuo, 1997). In this study, both high (30°C) and low temperature (10°C) inhibited the activity of LYS of P. clarkia, revealing 10°C and 30°C may be above and below the critical temperature of P. clarkii immunity.…”

Super-fast breeding of all-female giant grass carp by tiny zebrafish

“…For aquaculture production, monosex fish are intrinsically desirable due to several potential benefits: reduced variation in harvest size, control of reproduction, reduced territorial behavior and high growth performance achieved by exploiting sexual dimorphism in growth rates. A growth monitoring of pond-bred grass carp has shown that female grass carp have a higher growth rate than males 11 . All-female breeding will be more economically valuable than mixed-sex breeding.…”

“…However, the prolonged sexual maturation phase of grass carp, spanning approximately four to five years in the majority of cultivated areas, poses a significant obstacle to the implementation of conventional breeding methods, including hybridization, genetic selection, and sex control, for genetic improvement of grass carp 10 . In pond culture systems, it is noteworthy that female grass carp exhibit considerably accelerated growth rates compared to their male counterparts, underscoring the significance of prioritizing the breeding of all-female grass carp 11 .…”