Citation:

fsv062

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Abstract:

We combined longitudinal analyses of otolith microstructure and trace elemental composition in ~ age 1-2 Pacific bluefin tuna (PBT, n = 24) for inferring the arrival of individuals in the California Current Large Marine Ecosystem (CCLME). Element:Ca ratios in transverse otolith sections (9-12 rows, triplicate ablations from coreprimordium to edge, ø50 µm) were quantified for eight elements: Li, Mg, Mn, Co, Cu, Zn, Sr, and Ba, which was followed by microstructure analysis to provide age estimates corresponding to each ablation spot. Age estimates from otoliths ranged from 328 to 498 days post hatch. The combined elemental signatures of four elements (Ba, Mg, Co, Cu) showed a significant increase at the otolith edge in approximately half of the individuals (30-60 days prior to catch). Given the different oceanographic properties of oligotrophic open Pacific vs. high nutrient, upwelling CCLME waters, this signal is consistent with the entry of the fish into the CCLME, which was estimated to occur primarily in July after a transoceanic migration of ~1.5-2.0 months.

Other version:

Link to original table format of Baumann et al. (2015). hdl:10013/epic.45256.d001

Coverage:

Median Latitude: 34.550000 * Median Longitude: -120.450000 * South-bound Latitude: 32.000000 * West-bound Longitude: -123.300000 * North-bound Latitude: 37.100000 * East-bound Longitude: -117.600000

Date/Time Start: 2012-08-04T00:00:00 * Date/Time End: 2012-09-25T00:00:00

Event(s):

California_current * Latitude Start: 37.100000 * Longitude Start: -123.300000 * Latitude End: 32.000000 * Longitude End: -117.600000 * Location: California Current * Method/Device: Net (NET)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Species	Species		Baumann, Hannes
2	Location	Location		Baumann, Hannes		port of landing
3	Identification	ID		Baumann, Hannes		of individual
4	Fish, curved fork length	Fish CFL	cm	Baumann, Hannes
5	DATE/TIME	Date/Time				Geocode
6	Number	No		Baumann, Hannes		of daily increments counted from the core (=primordium) to the edge of the transversal otolith section
7	Age	Age	days	Baumann, Hannes		estimated: No. of inc + 30 days
8	Number	No		Baumann, Hannes		row of each ablation spot going from the core (row = 1) to the edge
9	Replicate	Repl		Baumann, Hannes		replicate ablation spot within each ablation row. Rows 1-5 only had a single ablation, whereas rows 6 to edge had 3 replicate ablation spots. Terminal rows sometimes only had 2 ablation spots
10	Distance	Distance	µm	Baumann, Hannes		from core
11	Age	Age	days	Baumann, Hannes		mid age
12	Age	Age	days	Baumann, Hannes		negative range
13	Age	Age	days	Baumann, Hannes		positive range
14	Time in days	Time	days	Baumann, Hannes		day prior to catch of each ablation spot (=Mid age - Age)
15	Date	Date		Baumann, Hannes		date when the mid increment of each ablation spot was formed (= Sampling Date - Age + Mid age)
16	Calcium	Ca	%	Baumann, Hannes		concentration of each ablation spot relative to the calcium standard
17	Barium	Ba	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
18	Otolith, Barium/Calcium ratio	Otolith Ba/Ca	µmol/mol	Baumann, Hannes
19	Ratio	Ratio		Baumann, Hannes		Ba/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
20	Cobalt	Co	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
21	Otolith, Cobalt/Calcium ratio	Otolith Co/Ca	µmol/mol	Baumann, Hannes
22	Ratio	Ratio		Baumann, Hannes		Co/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
23	Copper	Cu	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
24	Otolith, Copper/Calcium ratio	Otolith Cu/Ca	µmol/mol	Baumann, Hannes
25	Ratio	Ratio		Baumann, Hannes		Cu/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
26	Lithium	Li	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
27	Otolith, Lithium/Calcium ratio	Otolith Li/Ca	µmol/mol	Baumann, Hannes
28	Ratio	Ratio		Baumann, Hannes		Li/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
29	Magnesium	Mg2+	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
30	Otolith, Magnesium/Calcium ratio	Otolith Mg/Ca	µmol/mol	Baumann, Hannes
31	Ratio	Ratio		Baumann, Hannes		Mg/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
32	Manganese	Mn	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
33	Otolith, Manganese/Calcium ratio	Otolith Mn/Ca	µmol/mol	Baumann, Hannes
34	Ratio	Ratio		Baumann, Hannes		Mn/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
35	Strontium	Sr	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
36	Otolith, Strontium/Calcium ratio	Otolith Sr/Ca	mmol/mol	Baumann, Hannes
37	Ratio	Ratio		Baumann, Hannes		Sr/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
38	Zinc	Zn	mg/kg	Baumann, Hannes	Inductively coupled plasma - mass spectrometry (ICP-MS)
39	Otolith, Zinc/Calcium ratio	Otolith Zn/Ca	µmol/mol	Baumann, Hannes
40	Ratio	Ratio		Baumann, Hannes		Zn/Ca standardized to zero mean and unit variation separately for each individual (see formula in the paper)
41	Observation	Obs		Baumann, Hannes		1 = an 'entry signal' based on the increase in Ba, Co, Cu, and Mg was detected; 0 = no signal detected

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

33920 data points

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