Bücker, Amelie (2006): Age and growth parameters of skates of the genus Bathyraja obtained between 2003-2005 along the Argentine continental shelf [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.786656
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
In the last 20 years directed shark and ray fishery has increased alarmingly everywhere in the world. For most species though, no data on growth rate, mortality, fecundity and other life history aspects exist as of now and management of the fishery is therefore insufficient. Also there still exist methodological difficulties in the age determination of elasmobranchs fishes, a fact which complicates the investigation of growth parameters. This study tried to identify the best ageing methods and estimate growth parameters for ten skate species of the genus Bathyraja, all occurring in the southwest Atlantic in depths of 50m and more. 720 samples were collected on board of argentine research vessels in between 2003 and 2005. Crystal violet and a new staining method using potassium permanganate, both applied on sagittal sections of vertebral centra, proved to be most effective in enhancing the banding pattern in most of the species. Thorns were also tested and readings were consistent with the ones made on vertebral sections. Growth parameters could be derived for six species and for the other four estimates could be made. Growth rate as well as infinite length varied between species, with those attaining bigger sizes having lower growth rates. No latitudinal differences in growth rate could be detected but a comparison with samples from other studies showed that total lengths were always reported to be higher around the Malvinas Islands.
Related to:
Bücker, Amelie (2006): Age and growth of skates of the genus Bathyraja in Argentina. Master Thesis, Faculty for Biology and Chemistry, University of Bremen, Germany, 63 pp, hdl:10013/epic.39806.d001
Coverage:
Median Latitude: -45.176387 * Median Longitude: -60.841190 * South-bound Latitude: -54.235000 * West-bound Longitude: -68.369000 * North-bound Latitude: -36.158000 * East-bound Longitude: -54.039000
Date/Time Start: 2003-01-01T00:00:00 * Date/Time End: 2005-12-31T00:00:00
Event(s):
EH-OB_track * Latitude Start: -36.158000 * Longitude Start: -54.088000 * Latitude End: -54.235000 * Longitude End: -64.087000 * Date/Time Start: 2003-01-01T00:00:00 * Date/Time End: 2005-12-31T00:00:00 * Location: Continental slope off Argentina * Method/Device: Bottom trawl (BT) * Comment: Research Vessels Dr. E. Holmberg and Cap. Oca Balda, Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
Comment:
This work was conducted at the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, in the frame of the project ECORAYA. Bathyraja specimens as well as the catch, length and width data were provided by the INIDEP. For information on the methods used (stains, vertebrae sections etc.) see thesis.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets
Download Data
Datasets listed in this publication series
- Bücker, A (2006): (Appendix 1) Total length, disc width, centrum width and age of Bathyraja albomaculata, Argentine continental shelf. https://doi.org/10.1594/PANGAEA.786651
- Bücker, A (2006): (Appendix 2) Total length, disc width, centrum width and age of Bathyraja brachyurops, Argentine continental shelf. https://doi.org/10.1594/PANGAEA.786652
- Bücker, A (2006): (Appendix 3) Total length, disc width, centrum width and age of Bathyraja griseocauda, Argentine continental shelf. https://doi.org/10.1594/PANGAEA.786653
- Bücker, A (2006): (Appendix 4) Total length, disc width, centrum width and age of Bathyraja macloviana, Argentine continental shelf. https://doi.org/10.1594/PANGAEA.786654
- Bücker, A (2006): (Appendix 5) Total length, disc width, centrum width and age of Bathyraja magellanica, Argentine continental shelf. https://doi.org/10.1594/PANGAEA.786655