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<datestamp>2018-01-10</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Identifying Robust Proxies of Gonad Maturation for the Protandrous Hermaphrodite Tridacna maxima (Röding, 1798, Bivalvia) from Individual to Population Scale</title>
<creator>Menoud, Mathilde</creator>
<creator>Wynsberge, Simon Van</creator>
<creator>Moullac, Gilles Le</creator>
<creator>Levy, Peva</creator>
<creator>Andréfouët, Serge</creator>
<creator>Remoissenet, Georges</creator>
<creator>Gaertner-mazouni, Nabila</creator>
<contributor>Ecosystèmes Insulaires Océaniens (UMR 241) (EIO) ; Institut de Recherche pour le Développement (IRD) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Institut Louis Malardé [Papeete] (ILM) ; Institut de Recherche pour le Développement (IRD) - Université de la Polynésie Française (UPF)</contributor>
<contributor>Laboratoire d'Excellence CORAIL (LabEX CORAIL) ; Institut de Recherche pour le Développement (IRD) - Université des Antilles et de la Guyane (UAG) - École des hautes études en sciences sociales (EHESS) - École pratique des hautes études (EPHE) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Université de la Réunion (UR) - Université de la Polynésie Française (UPF) - Université de Nouvelle Calédonie - Institut d'écologie et environnement</contributor>
<contributor>Ecologie marine tropicale des océans Pacifique et Indien (ENTROPIE [Nouvelle-Calédonie]) ; Institut de Recherche pour le Développement (IRD [Nouvelle-Calédonie])</contributor>
<contributor>Direction des Ressources Marines et Minières</contributor>
<description>International audience</description>
<source>ISSN: 0730-8000</source>
<source>Journal of Shellfish Research</source>
<publisher>National Shellfisheries Association</publisher>
<identifier>hal-01613648</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01613648</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01613648/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01613648/file/Gaertner-Mazouni-2016-eio.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01613648</source>
<source>Journal of Shellfish Research, National Shellfisheries Association, 2016, 35 (1), pp.51 - 61. 〈10.2983/035.035.0107〉</source>
<identifier>DOI : 10.2983/035.035.0107</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.2983/035.035.0107</relation>
<language>en</language>
<subject lang=en>histology</subject>
<subject lang=en>Tridacna maxima</subject>
<subject lang=en>Tatakoto atoll</subject>
<subject lang=en>spawn</subject>
<subject lang=en>giant clam</subject>
<subject lang=en>marine bivalve</subject>
<subject lang=en>reproduction</subject>
<subject>[SDV.BA.ZI] Life Sciences [q-bio]/Animal biology/Invertebrate Zoology</subject>
<subject>[SDV.BDD.GAM] Life Sciences [q-bio]/Development Biology/Gametogenesis</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Monitoring gonad maturation for protandrous and functional hermaphrodite species such as the giant clam Tridacna maxima is difficult due to the juxtaposition and relative proportion of male and female tissues in the gonad [gonadal sex ratio (GSR)]. Here, the relevance of the widely used gonadosomatic index (GSI) as proxy of giant clam gonad maturation is tested with a large dataset (n ¼ 265). Gonadosomatic index is compared with other indices, namely the proportion of the male part harboring spermatozoids, the proportion of empty oocyte follicles, the mean oocyte diameter, and the oocyte elongation. At gonad scale, high index variability highlighted partial spawning. At individual scale, male and female maturation proxies were contrasted, showing either asynchronous emissions of male and female gametes or contrasted spermatogenesis and oogenesis duration. The GSI was mostly driven by the number and diameter of oocytes and therefore it is recommended here as primary proxy for female maturity. Except for the oocyte elongation, all indices were affected by the GSR, which ruled out drawing conclusions at population scale. These results highlight the need for maturation stage proxies that are optimized for functional hermaphrodite species.</description>
<date>2016-04</date>
</dc>
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