Cruise Report 70-S-5: Big Game Fish

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The status of the California yellowtail resource and its management

The California yellowtail, Seriola dorsalis, is a highly favored sport fish and a minor commercial species. Since 1954 commercial landings have been limited by demand, and the sport catch has been about three times the number of fish caught by commercial fishermen. Recreational fishing for yellowtail in southern California waters is almost entirely dependent on annual migrants from central and northern Baja California. The resource is presently healthy but reduced catches off California could be the result of an expanded catch off Mexico. (19pp.

Evolution of time preference by natural selection

We reexamine Rogers’ (1994) analysis of the biological basis of the rate of time preference. Although his basic insight concerning the derivation of the felicity function holds up, the functional form he uses does not generate the evolutionary equilibrium behavior. Moreover, Rogers relies upon an interior solution for a particular kind of intergenerational transfer. We show such interior solutions do not generally arise. Hence Rogers most striking prediction, namely that the real interest rate should be about 2% per annum, does not follow

Participants’ reflections on being interviewed about risk and sexual behaviour: implications for collection of qualitative data on sensitive topics

In this article, we explore how those taking part in an interview about sex and risk reflected on their participation and what, if any, impact it had on them. All 22 individuals who were interviewed in an initial study were invited to document their thoughts and feelings about the research process in a short follow-up exercise. The data relating to the 11 people who shared their reflections on the interview were subjected to a thematic analysis. The themes that emerged describe the value participants placed on honest and open interaction within neutral and non-judgmental environments. They also illustrate how being interviewed about prior behaviour can facilitate a sense-making process and might provide some degree of cathartic benefit. The findings help improve our understanding of how individuals reflect on their interview participation, which can in turn help to inform the development of ethically sensitive qualitative data collection