![]() Price of about $10 per pound (Chew 1998). Washington and $200,000 for Alaska at a selling Geoduck harvest value was around US$30 millionĪnnually for British Columbia, $6 million for In 1998,Įstimates indicated that the commercial wild Great demand which has been steadily increasing in Of the catch is sent to Asian markets, where it is in Average landings (2006'008) were 16 t each year, Washington since 1970 (Gordon 2007) and BritishĬolumbia since 1976 (James 2008). Panopea generosa has been harvested in coastal Gulf of California and Bahı́a Magdalena along the 2010 to explicitlyĬonnect the two names) from Alaska to BajaĬalifornia, Mexico and P. (incorrectly referred to as the fossil species P. Panopea japonica Adams, 1850 off the coasts ofĬhina, Japan, and Korea P. Panopea has a worldwide non-tropical distributionĪnd three species are found in the North Pacific: Key words: Gametogenesis, oocyte cohort, gonadosomatic index, sex ratio, temperature ![]() Of geoducks in this region needs specific strategies. The results showed significant differences in gametogenic patterns relative to northern congeners, which suggest that fishery generosa at its southernmost distribution. ![]() This is the first description of the reproductive activity of P. The sex ratio was dominated by females (2.8:1) although sexually undifferentiated geoduck clams were The gonadosomatic index correlated well with development of the species’ Spawning of less intensity during late summer occurred when the Of summer, when temperature was increasing. Ripe gametes were continuously released with a main spawning at the beginning Gamete reabsorption within the gonad might reflect aĬonservative pattern of nutrient recycling. During this period, several oocyte cohorts were developed, but only threeĪttained maturity, the rest being reabsorbed into the gonad. generosa begins in late autumn, with a developing phase in winter and continuous proliferation and Mexico was studied, using standard histological techniques, oocyte cohort analysis and a gonadosomatic index. The reproductive cycle of Panopea generosa at the southernmost limit of its distribution in the State of Baja California, ARAGÓN-NORIEGA2,ĮNRIQUE MORALES-BOJÓRQUEZ3, EDGAR ALCÁNTARA-RAZO2 &Ĭentro de Investigación Cientı́fica y de Educación Superior de Ensenada, Tijuana, Mexico, 2Centro de Investigacionesīiológicas del Noroeste, Unidad Sonora, Mexico, and 3Centro de Investigaciones Biológicas del Noroeste, La Paz, Mexico Reproductive cycle of the geoduck clam Panopea generosa at itsĭownloaded by at 22:56 24 September 2013 Terms & Conditions of access and use can be found at Marine Biology Research, 2014 Reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in anyįorm to anyone is expressly forbidden. This article may be used for research, teaching, and private study purposes. Liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or Not be liable f or any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other ![]() Upon and should be independently verified with primary sources of information. The accuracy of the Content should not be relied Any opinions and views expressed in this publication are the opinions and views of the authors,Īnd are not the views of or endorsed by Taylor & Francis. Representations or warranties whatsoever as to the accuracy, completeness, or suitability for any purpose of However, Taylor & Francis, our agents, and our licensors make no Taylor & Francis makes every effort to ensure the accuracy of all the information (the “Content”) contained Aragón-Noriega, Enrique Morales-Bojórquez, Edgar AlcántaraRazo & Jorge Chávez-Villalba (2014) Reproductive cycle of the geoduck clam Panopea generosa at its southernmostĭistribution limit, Marine Biology Research, 10:1, 61-72, DOI: 10.1080/17451000.2013.793808 Aragón-Noriega, Enrique Morales-Bojórquez ,Įdgar Alcántara-Razo & Jorge Chávez-VillalbaĬentro de Investigación Científica y de Educación Superior de Ensenada, Tijuana,Ĭentro de Investigaciones Biológicas del Noroeste, Unidad Sonora, MexicoĬentro de Investigaciones Biológicas del Noroeste, La Paz, Mexico Generosa at its southernmost distribution limit Reproductive cycle of the geoduck clam Panopea Publication details, including instructions for authors and subscription information: House, 37-41 Mortimer Street, London W1T 3JH, UK Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer
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