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
Always quote citation above when using data! You can download the citation in several formats below.
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. PhD Thesis, University of Bremen, Germany, 124, urn:nbn:de:gbv:46-diss000113783
Project(s):
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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Geocode | |||
| 2 | Gonad stage, preactive | Gon stg preact | # | Riascos, José M | Processing method according to Romeis, 1989 | |
| 3 | Gonad stage, active | Gon stg act | # | Riascos, José M | Classification after Delgado & Defeo, 2007 | |
| 4 | Gonad stage, spawned | Gon stg spawn | # | Riascos, José M | Processing method according to Romeis, 1989 | |
| 5 | Gonad stage, cytholysed | Gon stg cytho | # | Riascos, José M | Classification after Delgado & Defeo, 2007 |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
96 data points
Data
| 1 Date/Time | 2 Gon stg preact [#] | 3 Gon stg act [#] | 4 Gon stg spawn [#] | 5 Gon stg cytho [#] |
|---|---|---|---|---|
| 2005-05 | 19 | 6 | 0 | 0 |
| 2005-06 | 15 | 6 | 0 | 3 |
| 2005-07 | 2 | 14 | 0 | 4 |
| 2005-08 | 1 | 19 | 4 | 0 |
| 2005-09 | 0 | 20 | 5 | 3 |
| 2005-10 | 0 | 13 | 8 | 6 |
| 2005-11 | 0 | 3 | 20 | 1 |
| 2005-12 | 0 | 0 | 21 | 1 |
| 2006-01 | 0 | 0 | 8 | 20 |
| 2006-02 | 4 | 0 | 5 | 20 |
| 2006-03 | 2 | 0 | 2 | 15 |
| 2006-04 | 13 | 0 | 0 | 12 |
| 2006-05 | 9 | 0 | 0 | 11 |
| 2006-06 | 14 | 0 | 0 | 4 |
| 2006-07 | 15 | 3 | 0 | 1 |
| 2006-08 | 4 | 9 | 1 | 4 |
| 2006-09 | 0 | 15 | 2 | 8 |
| 2006-10 | 0 | 18 | 6 | 4 |
| 2006-11 | 0 | 14 | 11 | 5 |
| 2006-12 | 0 | 0 | 15 | 3 |
| 2007-01 | 1 | 0 | 4 | 14 |
| 2007-02 | 9 | 0 | 0 | 10 |
| 2007-03 | 11 | 0 | 0 | 9 |
| 2007-04 | 16 | 0 | 0 | 2 |