Ecological studies of exploited populations of whales and rock lobsters
1v. (Various paging) : The humpback whale and the western rock lobster are widely separated in phylogeny, morphology and physiology. At first sight they have little in common except a marine habitat. Both have a relatively high longevity and when undisturbed appear to attain fairly stable population...
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/38493 2023-05-15T16:36:06+02:00 Ecological studies of exploited populations of whales and rock lobsters Chittleborough, Robert Graham Dept. of Zoology 1978 45452 bytes application/pdf http://hdl.handle.net/2440/38493 en eng Adelaide http://hdl.handle.net/2440/38493 Thesis 1978 ftunivadelaidedl 2023-02-06T07:18:42Z 1v. (Various paging) : The humpback whale and the western rock lobster are widely separated in phylogeny, morphology and physiology. At first sight they have little in common except a marine habitat. Both have a relatively high longevity and when undisturbed appear to attain fairly stable population levels determined by responses to environmental pressures. However, in most other respects their life cycles differ greatly, as shown by the summary in Table 1. Despite these differences, when populations of either species are exploited commercially, a similar rationale is applied to management. Compensatory changes are expected to occur to some extent in birth rate, growth rate, and/or survival as the population is reduced (usually selectively) from some maximal level. Where the interactions of these parameters are optimised giving greatest recruitment to the fishable stock, a fishery can be continued indefinitely at a level classically known as the maximum sustainable yield. Thus in spite of the widest of differences between these species, the responses of their populations to fishing pressure are expected to be similar in principle if not in extent. The research upon humpback whales is brought together in paper 14, while the implications of the findings on the western rock lobster are discussed in paper 26. Following the presentation of research papers, the above hypothesis is examined ln the light of data collected from populations of humpback whales and the western rock lobster as these were exposed to high rates of exploitation. Thesis (D.Sc.)--University of Adelaide, Dept. of Zoology, 1979 Thesis Humpback Whale The University of Adelaide: Digital Library |
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The University of Adelaide: Digital Library |
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ftunivadelaidedl |
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1v. (Various paging) : The humpback whale and the western rock lobster are widely separated in phylogeny, morphology and physiology. At first sight they have little in common except a marine habitat. Both have a relatively high longevity and when undisturbed appear to attain fairly stable population levels determined by responses to environmental pressures. However, in most other respects their life cycles differ greatly, as shown by the summary in Table 1. Despite these differences, when populations of either species are exploited commercially, a similar rationale is applied to management. Compensatory changes are expected to occur to some extent in birth rate, growth rate, and/or survival as the population is reduced (usually selectively) from some maximal level. Where the interactions of these parameters are optimised giving greatest recruitment to the fishable stock, a fishery can be continued indefinitely at a level classically known as the maximum sustainable yield. Thus in spite of the widest of differences between these species, the responses of their populations to fishing pressure are expected to be similar in principle if not in extent. The research upon humpback whales is brought together in paper 14, while the implications of the findings on the western rock lobster are discussed in paper 26. Following the presentation of research papers, the above hypothesis is examined ln the light of data collected from populations of humpback whales and the western rock lobster as these were exposed to high rates of exploitation. Thesis (D.Sc.)--University of Adelaide, Dept. of Zoology, 1979 |
author2 |
Dept. of Zoology |
format |
Thesis |
author |
Chittleborough, Robert Graham |
spellingShingle |
Chittleborough, Robert Graham Ecological studies of exploited populations of whales and rock lobsters |
author_facet |
Chittleborough, Robert Graham |
author_sort |
Chittleborough, Robert Graham |
title |
Ecological studies of exploited populations of whales and rock lobsters |
title_short |
Ecological studies of exploited populations of whales and rock lobsters |
title_full |
Ecological studies of exploited populations of whales and rock lobsters |
title_fullStr |
Ecological studies of exploited populations of whales and rock lobsters |
title_full_unstemmed |
Ecological studies of exploited populations of whales and rock lobsters |
title_sort |
ecological studies of exploited populations of whales and rock lobsters |
publisher |
Adelaide |
publishDate |
1978 |
url |
http://hdl.handle.net/2440/38493 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_relation |
http://hdl.handle.net/2440/38493 |
_version_ |
1766026400207208448 |