出版社：Government of Western Australia / Department of Fisheries
摘要：An important issue when surveying the reproductive condition of large numbers of female
Panulirus cygnus in the field is that each animal must be assessed quickly and accurately on
the basis of only a few easily discernable criteria. The four biological criteria most commonly
recorded for each lobster are (i) ovigerous setae condition (not present, partially developed and
fully developed), (ii) the presence (unused or eroded) of a spermatophore mass, (iii) the presence
and developmental stage of external ova, and (iv) the visual appearance of the ovaries through
the dorso-thoracic musculature. Using the above criteria each female can then be assigned to a
reproductive state, i.e. immature, inactive breeder, single breeder or double breeder. Researchers
have used a combination of these criteria that, predominantly when assigning double breeders,
relies very heavily on an accurate ovary assessment, a criterion that can be subjective.
This study compared external assessments with internal cellular development of the ovary (via
histology) and elucidated the shortcomings of the external technique. This has resulted in the
production of a set of criteria that, if sampled during the peak of the breeding season, enables
the breeding state of a female western rock lobster to be more accurately determined in the field
without causing it any damage. The height of the breeding season is the optimum time for stock
egg production assessment.
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