00000nam 2200000zi 4500 9.872471 CaOODSP 20221107163644 m o d f cr ||||||||||| 190503s1980 nkca|||#ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-nk Fs70-8/80-43E-PDF Waddy, S. L., author. Determining size at maturity and predicting egg extrusion from cement gland development in Homarus americanus / S.L. Waddy and D.E. Aiken. St. Andrews, New Brunswick : Fisheries and Environmental Sciences, Department of Fisheries and Oceans, Biological Station, [1980]. 1 online resource (6 pages, 2 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier CAFSAC research document ; 80/43 Caption title. Digitized edtion from print [produced by Department of Fisheries and Oceans]. "This paper not to be cited without prior reference to the authors." Includes bibliographical references (pages 4-5). "In mature female Homarus, the abdominal cement glands wax and wane with ovarian development and oviposition. As the ova become mature, the glands become progressively more engorged. A simple technique for evaluating this cement gland development has been developed and related to ovarian maturity and egg extrusion. Both macroscopic and microscopic methods of assessing degree of cement gland development on the pleopod endopodites have been described. The technique enables field biologists to examine pleopods in situ to differentiate between a mature and an immature female prior to the spawning season and to determine whether a mature female will spawn in the current season. This will allow an accurate assessment of stage of maturation of any female prior to or during the egg-laying season and should greatly simplify determinations of size at maturity and numbers of mature females in the population."--Abstract. Includes abstract in French. gccst Fisheries gccst Crustaceans Aiken, D. E., author. Canada. Department of Fisheries and Oceans. CAFSAC research document (Canadian Atlantic Fisheries Scientific Advisory Committee) 80/43 (CaOODSP)9.869616 PDF 734 KB https://publications.gc.ca/collections/collection_2019/mpo-dfo/Fs70-8-80-43-eng.pdf