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Physiological adaptations of the prawn Palaemon elegans (Rathke)
Başlık:
Physiological adaptations of the prawn Palaemon elegans (Rathke)
Yazar:
Morris, Stephen, author.
ISBN:
9780438054462
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (353 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 76-08C.
Advisors: Alan Taylor.
Özet:
The aim of this work has been to carry out a study of the respiratory adaptations of the intertidal prawn Palaemon elegans (Rathke). P. elegans occurs primarily in rockpools at or above the level reached by high water of neap tides. On Scottish coast, P. elegans is the only natant decapod crustacean found within the intertidal zone. However, further south P. serratus occurs as a low shore species and may influence the distribution of elegans. Previously, it was thought that this animal migrated off shore during the winter months, however, specimens were collected all the year round during 1981 and 1982. The size frequency of seasonal catches was variable and indicated an annual recruitment to the population. P. elegans was selected for this study since it was apparent that it must show a number of adaptations to enable it to live in the fluctuating environment of the rockpools. Part of the work involved a study of the physico-chemical parameters in rockpools to quantify the extent of diurnal and seasonal variation in conditions within this habitat. The physico-chemical parameters measured within the pools included the partial pressure of oxygen (PO2)/temperature, salinity and pH. These measured values together with laboratory analysis of water samples permitted the calculation of the partial pressure of carbon dioxide (PCO2), the concentration of carbon dioxide (CCO2) and alkalinity. These determinations were made for pools at various locations between the lower and upper limits of ordinary spring tides. Measurements were made over 24 hour periods at monthly intervals for a period of two years and demonstrated that the diurnal and seasonal fluctuation in the various parameters in the pools greatly exceeded that observed in open water. The greatest diurnal variation was shown by PO2 and temperature. The Po2 often exceeded 400 torr in the late afternoon before subsequently falling to near zero during the night. The recorded pH of the pools was often highly variable in association with changing levels of CO2. Temperature and oxygen were the most variable of the physicochemical parameters recorded and the effects of this on the respiratory physiology of elegans were studied in the laboratory. The response to acute change in temperature for animals of various sizes acclimated to 10°C was not constant over the range used (1 - 30°C ) and whilst the Q10 for oxygen consumption was usually less than 2 it was considerably larger at extreme temperatures. (Abstract shortened by ProQuest.).
Notlar:
School code: 0547
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(684498.1) | 684498-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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