FN Archimer Export Format PT J TI Mass Mortalities Affecting Populations of the Yellow Clam Amarilladesma mactroides Along Its Geographic Range BT AF VAZQUEZ, Nuria FIORI, Sandra ARZUL, Isabelle CARCEDO, Cecilia CREMONTE, Florencia AS 1:1;2:2,3,4;3:5;4:2;5:1; FF 1:;2:;3:PDG-RBE-SG2M-LGPMM;4:;5:; C1 Inst Biol Organismos Marinos IBIOMAR CCT CONICET, Lab Parasitol, Blvd Brown 2915,U9120ACF, Puerto Madryn, Chubut Province, Argentina. Univ Nacl Sur, CONICET, IADO, Inst Argentino Oceanog, Florida 8000,B8000FWB, Bahia Blanca, Buenos Aires, Argentina. Univ Nacl Sur, Dept Biol Bioquim & Farm, San Juan 670,B8000FWB, Bahia Blanca, Buenos Aires, Argentina. Consejo Nacl Invest Cient & Tecn, Inst Argentino Oceanog, Camino La Carrindanga Km 7-5, B8000FWB, Bahia Blanca, Buenos Aires, Argentina. Inst Francais Rech Exploitat Mer IFREMER, SG2M LGPMM, F-17390 La Tremblade, France. C2 IBIOMAR, ARGENTINA UNIV NACL SUR, ARGENTINA UNIV NACL SUR, ARGENTINA CONSEJO NACL INVEST CIENT & TECN, ARGENTINA IFREMER, FRANCE SI LA TREMBLADE SE PDG-RBE-SG2M-LGPMM IN WOS Ifremer jusqu'en 2018 copubli-int-hors-europe copubli-sud IF 0.721 TC 10 UR https://archimer.ifremer.fr/doc/00362/47283/47260.pdf LA English DT Article DE ;mass mortalities;viral susceptibility;Amarilladesma mactroides;pathologies AB The yellow clam Amarilladesma mactroides (Deshayes, 1854) is considered a vulnerable species since the mid-1990s. Populations have experienced mass mortalities throughout their entire range of distribution (23–41°S) along exposed sandy beaches of Atlantic South America. Detrimental anthropogenic impacts have further contributed to failure of populations to make a recovery. To determine the factors involved in these events, density prior to a mortality event was calculated and live yellow clams encompassingmost of its geographic range distribution were analyzed histologically to describe parasites and pathologies. Moreover, moribund specimens were analyzed by molecular techniques to test for the presence of the virus OsHV-1. A mortality event was recorded after a maximum density of 127 clams/m2 was attained. No clear pattern was found between the prevalence and intensity of infection and localities, mortality events, or sampling season. Although OsHV-1 was not observed in any of the yellow clams tested, the possibility that another viral agent was implicated cannot be ruled out. The presence of bacteria of the genus Vibrio in combination with stress caused by a relatively high population density is suggested as the likely cause of these episodic mass mortalities. PY 2016 PD DEC SO Journal Of Shellfish Research SN 0730-8000 PU Natl Shellfisheries Assoc VL 35 IS 4 UT 000398959000003 BP 739 EP 745 DI 10.2983/035.035.0403 ID 47283 ER EF