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Riascos, José M; Laudien, Jürgen; Heilmayer, Olaf (2009): Gametogenic cycle of Mesodesma donacium in Hornitos (II Región), Chile, May 2005 to April 2007 [dataset]. Instituto de Investigaciones Oceanológicas, Universidad de Antofagasta, PANGAEA, https://doi.org/10.1594/PANGAEA.695933, In supplement to: Riascos, José M; Carstensen, Daniel; Laudien, Jürgen; Arntz, Wolf E; Oliva, Marcelo; Güntner, Andreas; Heilmayer, Olaf (2009): Thriving and declining: climate variability shaping life-history and population persistence of Mesodesma donacium in the Humboldt Upwelling System. Marine Ecology Progress Series, 385, 151-163, https://doi.org/10.3354/meps08042

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Related to:
Riascos, José M (2009): Thriving and declining: Population dynamics of the macha (Mesodesma donacium, Bivalvia, Mesodesmatidae) along a latitudinal gradient of the Humboldt Current Upwelling System [dissertation]. University of Bremen, Germany, 124, urn:nbn:de:gbv:46-diss000113783
Funding:
Sixth Framework Programme (FP6), grant/award no. 511071: Climate variability and El Niño Southern Oscillation
Coverage:
Latitude: -22.916500 * Longitude: -70.290300
Date/Time Start: 2005-05-15T00:00:00 * Date/Time End: 2007-04-15T00:00:00
Minimum Elevation: 0.0 m * Maximum Elevation: 0.0 m
Event(s):
Hornitos_meso_dona * Latitude: -22.916500 * Longitude: -70.290300 * Date/Time Start: 1970-01-01T00:00:00 * Date/Time End: 2008-12-31T00:00:00 * Elevation: 0.0 m * Location: Hornitos, Chile * Campaign: Historical_Chile * Method/Device: Sampling by hand (HAND)
Comment:
Parameters: Gonad stage: number of male or female clams in each of the following gonad stages: preactive; active; spawned; cytolysed. Collected clams were fixed in formalin and processed later in the laboratory using standard methods (Romeis 1989), embedding gonad tissue in paraplast wax after dehydration. Gonad tissue samples were always taken equally distant between the digestive gland and the proximal end of the foot. Two distinct slides (15mm length, 8mm whidth, 5 µm thik) were analyzed and no differences in gonad developement were observed between slides. Tissue slides were stained with hematoxylin-eosin. Gonad stages were classified following Delgado & Defeo (2007) for Donax hanleyanus.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeGeocode
2Gonad stage, preactiveGon stg preact#Riascos, José MProcessing method according to Romeis, 1989
3Gonad stage, activeGon stg act#Riascos, José MClassification after Delgado & Defeo, 2007
4Gonad stage, spawnedGon stg spawn#Riascos, José MProcessing method according to Romeis, 1989
5Gonad stage, cytholysedGon stg cytho#Riascos, José MClassification after Delgado & Defeo, 2007
Size:
96 data points

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