00000nam 2200000zi 4500 9.951344 CaOODSP 20250526102648 m o d f cr mn||||||||| 250526e198302##nscab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-ns Fs97-4/1694E-PDF Fs97-4/1694 Jessop, B. M., author. Aspects of the life history of the Atlantic silverside (Menidia menidia) of the Annapolis River, Nova Scotia / B.M. Jessop. Halifax, Nova Scotia : Freshwater and Anadromous Division, Fisheries Research Branch, Department of Fisheries and Oceans, February 1983. ©1983 1 online resource (ix, 41 pages) : illustrations, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1694 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 39-41). "Aspects of the life history of the Atlantic silverside, Menidia menidia, including seasonal distribution, age structure, sex ratio, growth rate, maturation and fecundity, were studied in the stratified, tidally restricted estuary of the Annapolis River, Nova Scotia. Adult silversides migrated into the estuary in April and May, spawned mainly in June and returned to sea between July and October. During spawning, adults were most abundant in the middle reaches of the estuary. Annapolis River silversides, which are near the northern limit of their range, have a greater proportion of Age-2 fish than do more southern populations. In all age groups, females are about twice as abundant as males. As a consequence of the shorter northern growing season, juveniles average smaller than do more southern populations, in spite of their faster growth rate. Maximum adult lengths are similar throughout the species range, but southern fish are Age 1 while northern fish reach Age 2. Females grew faster and lived longer than males, thereby attaining larger maximum sizes. Estimates of the von Bertalanffy growth-function parameters L ͚, K and tₒ for males were, 122.2 mm, 1.00 and -0.348; and for females, 128.2 mm, 1.04 and -0.305. A seasonal growth curve was more realistic and fitted the data better. The instantaneous rate of natural mortality (M) was similar (1.3) for both sexes. Sexual maturation and spawning first occur at Age 1. Fecundity increased with fish length, weight and age, ranging from about 700 to 3,100 ova/female. Age-2 females make an important contribution to population fertility. Insights into the life history of Atlantic silversides and the consequences for fishery management can be gained by viewing the species in terms of r- and K-selection theory. Silversides are typical r-strategists"--Abstract, page ix. Includes abstracts in English and French. Atlantic silverside Nova Scotia Annapolis River. Atlantic silverside Life cycles Nova Scotia Annapolis River. Atlantic silverside Seasonal distribution Nova Scotia Annapolis River. Fish populations Nova Scotia Annapolis River. Capucette Nouvelle-Écosse Annapolis, Fleuve. Capucette Cycles biologiques Nouvelle-Écosse Annapolis, Fleuve. Capucette Distribution saisonnière Nouvelle-Écosse Annapolis, Fleuve. Poissons Populations Nouvelle-Écosse Annapolis, Fleuve. Canada. Department of Fisheries and Oceans, issuing body. Canada. Department of Fisheries and Oceans. Maritimes Region. Freshwater and Anadromous Division, issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 1694. (CaOODSP)9.505211 PDF 1,015 KB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1694-eng.pdf