00000nam 2200000zi 4500 9.932508 CaOODSP 20240117131338 m o d f cr mn||||||||| 240116e197709 nkca ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre Fs97-4/1445E-PDF Fs97-4/1445 Caddy, J. F., author. Approaches to a simplified yield-per-recruit model for crustacea, with particular reference to the American lobster, Homarus americanus / by J.F. Caddy. St. Andrews, New Brunswick : Invertebrates and Plants Resource Branch, Fisheries Management - Maritimes, Department of Fisheries and Environment, Biological Station, September 1977. ©1977 1 online resource (iii, 14 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier Fisheries and Marine Service manuscript report, 0701-7618 ; 1445 "This is the fifth Manuscript Report in this series from the Biological Station, St. Andrews, N.B." Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 9-10). "A simplified approach to yield/recruit analysis in crustacean populations is presented based on those information inputs normally collected from crustacean fisheries, namely, moult frequency and increment as functions of size, length-weight relationships, and gear-selection ogives. For long-lived species, size-frequency modes are unlikely to reflect age or even moult groups in the strict sense. However, a mechanism is postulated for generation of size-frequency modes (containing individuals of a mixture of age and moult numbers) in the course of an intensively prosecuted fishery with rigorously enforced size limits. The decline in log numbers per arbitrary moult interval following entry to the legal size range is suggested as an index of overall mortality"--Abstract, page iii. Includes abstracts in English and French. American lobster fisheries Mathematical models. Lobster populations Mathematical models. Homard d'Amérique Pêche commerciale Modèles mathématiques. Crustacés Populations Modèles mathématiques. Canada. Fisheries and Marine Service, issuing body. Canada. Fisheries and Marine Service. Biological Station (St. Andrews, N.B.), issuing body. Manuscript report (Canada. Fisheries and Marine Service) no. 1445. (CaOODSP)9.924185 PDF 2.07 MB https://publications.gc.ca/collections/collection_2024/mpo-dfo/fs97-4/Fs97-4-1445-eng.pdf