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  • OceanRep  (2)
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  • 1995-1999  (2)
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  • OceanRep  (2)
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  • 1
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    Wiley
    In:  Journal of Applied Ecology, 36 (1). pp. 101-110.
    Publikationsdatum: 2021-06-11
    Beschreibung: 1. Monthly series of abundance indexes for the English Channel squid stock, based on fishery statistics of the United Kingdom (1980–93) and France (1986–96), were compared with water temperature data. The two objectives of the study were to test empirical predictive models and to analyse the stock–environment relationship at various time scales; both correlation and time-series statistical techniques were applied. Sea surface temperature (SST) showed inter-annual fluctuations and month-to-month auto-correlation in addition to the annual cycle. 2. Trends in squid landings and temperature at the annual scale were found to be related, whatever the statistical method used (moving averages, cumulative functions or regression using averaged data). 3. Variable selection applied in a ‘multi-month’ model suggested that fishing season indexes could be predicted from temperatures observed in the previous winter. The link between mild winter conditions and cohort success in winter/spring spawning species suggested that early life survival (and/or growth) was involved. This empirical model is a first step in the development of environment-predicted recruitment indexes useful for management advice. 4. Seasonal decomposition was performed on both the squid resource data and SST data in search of short-term relationships. In spite of the flexibility of the loliginid life-cycle, no significant relationship was found between squid seasonally adjusted indexes and temperature anomalies in the previous months. This underlined the conclusion that temperature effect on cohort success was not constant throughout the year.
    Materialart: Article , PeerReviewed
    Format: text
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  • 2
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    Missouri Botanical Garden
    In:  Annual Report Missouri Botanical Garden, 83 . pp. 29-36.
    Publikationsdatum: 2020-11-06
    Beschreibung: In addition to the potential negative impacts on biodiversity from fishing activities, there are positive aspects as well. Fisheries agencies are among the best equipped organizations to examine questions involving marine biodiversity because of their long history of studying marine populations. Furthermore, expansion of their involvement in these questions i sin the agencies' interest. Fisheries management depends not only on the accurate identification of target species, but also on understanding the ecosystem from whcich they come. Systematics is the base from which many questions about biodiversity must be addressed. Taxonomy is a critical tool for ecologists. Therefore, in addition to training new systematists, the systematics community must develop better ways to desseminate the information it develops and train other biologists to be proficient in taxonomy. Closer cooperation between fisheries and systematics is urgendtly needed to develop theknowledge and skills necessary for assessment and maintenance of marine biological diversity.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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