Dataset: Sand lance survival

Name: Survival of northern sand lance Ammodytes dubius offspring under factorial CO2 x temperature conditions
Published: 2021-05-27
Keywords: biota, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.749429.2

Spatial Extent: N:42.166183 E:-70.312275 S:42.166183 W:-70.312275

Temporal Extent: 2016-12-02 - 2017-11-24

Project:

Sensitivity of larval and juvenile sand lance Ammodytes dubius on Stellwagen Bank to predicted ocean warming, acidification, and deoxygenation (OA Stellwagen Sand Lance)

Principal Investigator:

Hannes Baumann (University of Connecticut, UConn)

Co-Principal Investigator:

Christopher S. Murray (University of Connecticut, UConn - Avery Point)

David Wiley (Stellwagen Bank National Marine Sanctuary)

Contact:

Hannes Baumann (University of Connecticut, UConn)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2021-05-27

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Survival of northern sand lance Ammodytes dubius offspring under factorial CO2 x temperature conditions

Abstract:

Survival source data of 2016-2018 experimental work on the sensitivity of northern sand lance (A. dubius) offspring to combined ocean warming and acidification.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2021-05-27	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.749429.2	2021-05-27
2019-09-20	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.749429.1	2019-09-23

Description

Survival source data of 2016-2018 experimental work on the sensitivity of northern sand lance offspring to combined ocean warming and acidification.

Methods & Sampling

Spawning-ripe sand lance were collected from SBNMS (42° 9' 58.26'' N, 70° 18' 44.19'' W) on 2 December 2016 and 22 November 2017, using a 1.3 × 0.7 m beam trawl (6 mm mesh) towed at 3 knots for 15 minutes.

We tested factorial combinations of three pCO2 × three temperature levels. The target for pCO2 controls was 400 µatm (~8.15 pHNIST), a level characteristic of the average open ocean and of the A. dubius spawning habitat in late fall (Salisbury and Jönsson, 2018). As contrasts, we chose 1,000 µatm (~7.78 pH) and 2,100 µatm (~7.48 pH), which correspond to predicted average ocean pCO2 levels by the years 2100 and 2300, respectively.

Response traits: Treatment-specific embryo survival was calculated in trials 1 and 3 as the proportion of hatchlings relative to the number of fertilized embryos (%), while in trial 2 the total number of hatchlings was used as a proxy for embryo survival. In trial 3, fertilization success (%) was calculated as the sum of hatched larvae + arrested embryos divided by 300. Treatment-specific daily hatch frequencies (= daily treatment hatch/total hatch within temperature treatment) were calculated for trials 2 and 3.

Data Processing Description

Data processing: Data were cross-checked with hand-written notes, checked for outliers/erroneous entries/numbers.

BCO-DMO Data Processing:
- modified parameter names (replaced spaces with underscores, replaced "%" with "pcnt")
- converted latitude and longitude from degrees, minutes, seconds to decimal degrees
- reformatted date from mm/dd/yyyy to yyyy-mm-dd
- replaced "n/a" with "nd" (no data);
- replaced earlier copy of data (2018-11-07) with revised copy on 2019-09-20;
- version 2 published on 2021-05-27. This version contains corrections to the pcnt_hatching_success data values.

Data Files

File
sand_lance_survival.csv (Comma Separated Values (.csv), 9.71 KB) MD5:183ac499cc8c2fc7ab4db5ea40893d61 Primary data file for dataset ID 749429

More Information about this dataset

Funding Sources

Funding Source	Award Number
New Hampshire Sea Grant	RNE16-CTHCE-l
NSF Division of Ocean Sciences	OCE-1536165

Deployments

None available yet

Instruments

Beam Trawl

Supplied Name: beam trawl

Supplied Description:

Spawning-ripe sand lance were collected using a beam trawl.

Instrument Type

Generic Name: Beam Trawl

Acronym: Beam trawl

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/24/

Generic Description:

A beam trawl consists of a cone-shaped body ending in a bag or codend, which retains the catch. In these trawls the horizontal opening of the net is provided by a beam, made of wood or metal, which is up to 12 m long. The vertical opening is provided by two hoop-like trawl shoes mostly made from steel. No hydrodynamic forces are needed to keep a beam trawl open. The beam trawl is normally towed on outriggers, one trawl on each side.

While fishing for flatfish the beam trawl is often equipped with tickler chains to disturb the fish from the seabed. For operations on very rough fishing grounds they can be equipped with chain matrices. Chain matrices are rigged between the beam and the groundrope and prevent boulders/stones from being caught by the trawl. Shrimp beam trawls are not so heavy and have smaller mesh sizes. A bobbin of groundrope with rubber bobbins keeps the shrimp beam trawl in contact with the bottom and gives flatfish the opportunity to escape.

Close bottom contact is necessary for successful operation. To avoid bycatch of most juvenile fishes selectivity devices are assembled (sieve nets, sorting grids, escape holes). While targeting flatfish the beam trawls are towed up to seven knots, therefore the gear is very heavy; the largest gears weighs up to 10 ton. The towing speed for shrimp is between 2.5 and 3 knots.

(from: http://www.fao.org/fishery/geartype/305/en)

pH Sensor

Supplied Name: pH electrode

Supplied Description:

pH electrode (Hach pHD, calibrated weekly using 2-point pHNIST references)

Instrument Type

Generic Name: pH Sensor

Generic Description:

An instrument that measures the hydrogen ion activity in solutions.

The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
initial_embryo_count	The total starting number of embryos per replicate	unitless	count
total_hatch	The total number of larvae that hatched wihtin each replicate	unitless	count
fertilization_date	Date offspring were fertilized by stripspawning 10+ adults of each sex; format: yyyy-mm-dd	unitless	date
trial	Trial number	unitless	exp_id
growth_rate	Average replicate growth rate (mm d-1) of offspring from hatch to experiment termination	millimeters per day(mm d-1)	growth
latitude	Latitude of adult collection site	decimal degrees	lat
longitude	Longitude of adult collection site	decimal degrees	lon
pCO2	Calculated average pCO2 levels in uatm calculated by CO2SYS based on alkalinity, pH, and temperature	uatm	pCO2
pH	Average pH level experienced by the fish NBS	pH NBS	pH
pcnt_hatching_success	% survival of embryos from fertilization to hatch	unitless (percent)	relative_abund
pcnt_larval_survival	% survival of larvae from hatch to 150 degree days post-hatch	unitless (percent)	relative_abund
replicate	Within experiment replicate number	unitless	replicate
adult_collection_site	Site of the collection of wild adult spawners	unitless	site
species	Ammodytes dubius, the northern sand lance	unitless	species
tank	Tank number	unitless	tank
temperature	Average temperature experienced by fish in degrees celsius	degrees Celsius	temp

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Dataset: Sand lance survival