The morphology of the foregut of larvae and postlarva of Sesarma curacaoense De Man, 1892: a species with facultative lecithotrophy during larval development

Previous study on the resistance of larvae of Sesarma curacaoense submitted to starvation has revealed a facultative lecithotrophy during zoeal stages, but megalopa and first juvenile stages are exclusively feeding stages. In the present study, the gross morphology and fine structure of the foregut of S. curacaoense were investigated during larval, megalopa and first juvenile stages. The foregut of the zoea I show specific setae and a filter press apparently functional. The foregut undergoes changes in the zoea II (last larval stage) with increment of setae number, mainly on the cardiopyloric valve and complexity of the filter press. After metamorphosis to megalopa stage the foregut become rather complex, with a gastric mill supporting a medial and two lateral teeth well-developed. The foregut of the first juvenile is more specialized compared to the previous stage, showing similar characteristics of the decapod adults. These results provide further evidence of facultative lecithotrophic development in the larvae of S. curacaoense.

Redescription of Ischadites elrodi (S. A. Miller, 1892) a Lower Devonian receptaculitid / [by] Matthew H. Nitecki --

v.20:no.5(1970)

Laboratory evaluation of Mesocyclops annulatus (Wierzejski, 1892) (Copepoda: Cyclopidea) as a predator of container-breeding mosquitoes in Argentina

In laboratory bioassays we tested the predatory capacity of the copepod Mesocyclops annulatus on Aedes aegypti and Culex pipiens larvae. A single adult female of M. annulatus caused 51.6% and 52.3% mortality of 50 first instar larvae of Ae. aegypti and Cx. pipiens respectively, in a 72 h test period. When alternative food was added to the containers, mortality rates declined to 16% and 10.3% for Ae. aegypti and Cx. pipiens respectively. When 50 first instar larvae of each of the two mosquito species tested were placed together with a single adult female of M. annulatus, mortality rates were 75.5% for Ae. aegypti larvae and 23.5% for Cx. pipiens larvae in a three day test period. Different density of adult females of M. annulatus ranged from 5 to 25 females produced mortality rates of Ae. aegypti first instar larvae from 50% to 100% respectively. When a single adult female of M. annulatus was exposed to an increasing number of first-instar Ae. aegypti larvae ranging from 10 to 100, 100% mortality was recorded from 1 to 25 larvae, then mortality declined to 30% with 100 larvae. The average larvae killed per 24 h period by a single copepod were 29.

Nuorten mielikuvat Suomen Kansallisteatterista

This thesis is about young people's views and mental images of the Finnish National Theatre (FNT). Research was needed into the views of young people about the FNT. The results would also be useful for FNT's marketing operations. The research was executed as a qualitative interview (based on a structured questionnaire) among 16 young people in January and February 2006. Four different high schools were involved: Ressun Lukio, Mäkelänrinteen Lukio, Kallion Lukio and Helsingin Kaupungin Kuvataidelukio (which together represented art-oriented high schools) and Vuosaaren Lukio. From each high school two boys and two girls were selected for interview. FNT's marketing director was also interviewed. The questions for the interview were formulated in co-operation with the FNT. The structural questionnaire was basically broken down into three different sections. The first section concentrated on the interviewee's hobbies and his/her past and present relationship to theatre. The second section consisted of questions about his/her views on the FNT. There were different sets of questions regarding whether or not the interviewee had visited the FNT. The last section was about the interviewee's use of media. This thesis focuses on the second section of questions. The answers revealed that, out of the group of sixteen, all but one had visited the FNT. Most of them saw the FNT as a traditional and valuable institution which is easier to approach than Finnish National Opera. Eleven of the interviewees reported that the main reason for their visit was a school project, and that without it they probably wouldn't have gone to the FNT at all. The thesis contemplates co-operation between the FNT and schools, and the meaning of art education for children's and young people's positive cultural development.

Suomen Voimisteluliiton Puheenjohtaja 9/9 1960

Kirje