Temporal variability in abundance and size of juvenile Atlantic cod (Gadus morhua) was studied at a shallow-water site in Trinity Bay, Newfoundland, from July 1982 to September 1983 and July 1989 to September 1990. Cod were collected with a small seine during the day and night. 0-group and 1-group cod predominated in the catch. Nighttime catches contained significantly more and larger cod than daytime catches primarily because 1-group cod were only collected at night. 1-group cod were not collected when water temperatures were less than 0 °C or when ice was present. Abundance peaked in August–November and April–June. Pelagic juveniles arrived inshore when water temperatures and salinities were highest (>12 °C, >30 ppt) in August and September and represented ~25–40 and 10%, respectively, of the cod collected at that time. Significantly more cod were collected in 1989–90 than in 1982–83, although water temperatures were not significantly different between the two periods. Sampling by additional fishing gears, including SCUBA observations, supports the hypothesis that 0-group and 1-group cod move into the sampling area at night (or dusk) and that daytime gear avoidance is secondary to diel activity patterns in explaining differences in day and night catches.

Objectives Asian communities in North America include large numbers of immigrants with limited English proficiency. Hepatitis B virus (HBV) infection is endemic in most Asian countries and, therefore, Asian immigrant groups have high rates of chronic HBV infection. We conducted a group-randomized trial to evaluate the effectiveness of a hepatitis B English as a second language (ESL) educational curriculum for Asian immigrants Methods Eighty ESL classes were randomized to experimental (hepatitis B education) or control (physical activity education) status. Students who reported they had not received a HBV test (at baseline) completed a follow-up survey six months after randomization. The follow-up survey assessed recent HBV testing and HBV-related knowledge. Provider reports were used to verify self-reported HBV tests. Results The study group included 218 students who reported they had not been tested for HBV. Follow-up surveys were completed by 180 (83%) of these students. Provider records verified HBV testing for 6% of the experimental group students and 0% of the control group students (p=0.02). Experimental group students were significantly (p<0.05) more likely than control group students to know that immigrants have high HBV infection rates, HBV can be spread during sexual intercourse and by sharing razors, and HBV infection can cause liver cancer. Conclusion Our ESL curriculum had a meaningful impact on HBV-related knowledge and a limited impact on HBV testing levels. Future research should evaluate the effectiveness of ESL curricula for other immigrant groups and other health topics, as well as other intervention approaches to increasing levels of HBV testing in Asian immigrant communities.

Objectives According to recent census data, 1,216,600 Canadians are of Chinese descent, and over 80% of Chinese Canadians are foreign born. Approximately 10% of Chinese immigrants are chronic carriers of hepatitis B, compared with less than 0.5% of the general population. English as a second language (ESL) classes provide ready access for individuals with limited English proficiency who are not reached by English language health education materials and media campaigns. We conducted a group-randomized trial to evaluate the effectiveness of a hepatitis B ESL educational curriculum for Chinese immigrants. Methods Five community-based organizations that provide ESL education in the greater Vancouver area participated in the study. Forty-one ESL classes (which included 325 Chinese students) were randomly assigned to experimental or control status. A follow-up survey, conducted six months after randomization, assessed knowledge about hepatitis B. Generalized estimating equations were used to analyze the data. Results Follow-up surveys were completed by 298 (92%) of the students. At follow-up, experimental group students were significantly (p<0.05) more likely than control group students to know that immigrants have higher hepatitis B infection rates than people who were born in Canada; hepatitis B can be spread during childbirth, during sexual intercourse and by sharing razors; hepatitis B is not spread by sharing eating utensils; and hepatitis B infection can cause cirrhosis and liver cancer. Conclusion Our findings indicate that ESL curricula can have a positive impact on health knowledge among Chinese immigrants with limited English. Future research should evaluate the effectiveness of ESL curricula for other immigrant groups, as well as other health topics.