Knorrn, Alexander H; Wieben, Kim L; Fock, Heino O; Andresen, Henrike (2023): Reproductive data of Electrona risso, Melamphaes polylepis and Scopelogadus mizolepis from the Eastern Central Atlantic in March and April 2015 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962192
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Abstract:
Knowledge on life history traits of mesopelagic fishes is still sparse. This dataset contains reproductive data of the myctophid Electrona risso (Cocco, 1829) and the melamphaids Melamphaes polylepis Ebeling, 1962 and Scopelogadus mizolepis (Günther, 1878). The specimens were collected in March and April 2015 during cruise 383 of the fishery research vessel "FFS Walther Herwig III" in the Eastern Central Atlantic. A pelagic midwater trawl ("Aalnet", Engel Netze, Bremerhaven Germany) with multiple opening-closing device with three net bags of 20 mm mesh size and 1.8 mm mesh size in the cod-end container was used for catching fish at three depth strata per station between 50 and 700 m depth. Fish was stored in phosphate buffered 4% formalin solution and later on land in laboratories, specimens were measured, weighed, and dissected to examine gonads and oocytes under a stereo microscope. Reproductive phases were assigned based on macroscopic inspection following the standardised terminology for reproductive development in fish by Brown-Peterson et al. (2011, doi:10.1080/19425120.2011.555724). Histological cross sections of selected individuals were used for validation. The Gonadosomatic Index was calculated as GSI = 100 x gonad mass / (total mass – gonad mass). Batch fecundities were determined with the gravimetric method, counting the most advanced eggs in weighed subsamples.
Keyword(s):
Supplement to:
Knorrn, Alexander H; Wieben, Kim L; Fock, Heino O; Andresen, Henrike (2023): Reproductive biology of the electric lanternfish Electrona risso (Myctophidae) and the bigscale fishes Melamphaes polylepis and Scopelogadus mizolepis (Melamphaidae). Journal of Fish Biology, jfb.15575, https://doi.org/10.1111/jfb.15575
Coverage:
Median Latitude: 7.153209 * Median Longitude: -23.298721 * South-bound Latitude: 0.027100 * West-bound Longitude: -25.967000 * North-bound Latitude: 23.866300 * East-bound Longitude: -19.916900
Date/Time Start: 2015-03-24T00:00:00 * Date/Time End: 2015-04-12T00:00:00
Event(s):
WH383_306-74 * Latitude: 10.594200 * Longitude: -19.916900 * Date/Time: 2015-03-24T00:00:00 * Location: Eastern Central Atlantic Ocean * Campaign: WH383 * Basis: Walther Herwig III * Method/Device: Midwater trawl (MWT)
WH383_309-78 * Latitude: 9.562300 * Longitude: -20.603400 * Date/Time: 2015-03-24T00:00:00 * Location: Eastern Central Atlantic Ocean * Campaign: WH383 * Basis: Walther Herwig III * Method/Device: Midwater trawl (MWT)
WH383_311-90 * Latitude: 9.525500 * Longitude: -20.584000 * Date/Time: 2015-03-25T00:00:00 * Location: Eastern Central Atlantic Ocean * Campaign: WH383 * Basis: Walther Herwig III * Method/Device: Midwater trawl (MWT)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Andresen, Henrike | |||
| 2 | DATE/TIME | Date/Time | Andresen, Henrike | Geocode | ||
| 3 | LONGITUDE | Longitude | Andresen, Henrike | Geocode | ||
| 4 | LATITUDE | Latitude | Andresen, Henrike | Geocode | ||
| 5 | Sampling | Sampling | Andresen, Henrike | Tow; "deckcatch" is from the forenet and could not be assigned to a depth stratum | ||
| 6 | Depth, water, top/minimum | Depth water top | m | Andresen, Henrike | Depth stratum upper boundary | |
| 7 | Depth, water, bottom/maximum | Depth water bot | m | Andresen, Henrike | Depth stratum lower boundary | |
| 8 | Sample ID | Sample ID | Andresen, Henrike | Fish-ID | ||
| 9 | Species, unique identification | Species UID | Andresen, Henrike | |||
| 10 | Species, unique identification (Semantic URI) | Species UID (Semantic URI) | Andresen, Henrike | |||
| 11 | Species, unique identification (URI) | Species UID (URI) | Andresen, Henrike | |||
| 12 | Fish, standard length | Fish SL | mm | Andresen, Henrike | Measured using callipers | |
| 13 | Fish, total length | Fish TL | mm | Andresen, Henrike | Measured using callipers | |
| 14 | Fish, wet mass | Fish wm | g | Andresen, Henrike | wet mass of formaline-preserved specimens | |
| 15 | Sex | Sex | Andresen, Henrike | Macroscopic inspection of gonad according to Brown-Peterson et al. (2011) | ||
| 16 | Gonad, mass | Gon m | g | Andresen, Henrike | ||
| 17 | Gonadosomatic index | GSI | Andresen, Henrike | GSI = 100 x Gonad mass/(Total mass - Gonad mass) | ||
| 18 | Reproductive phase | Repro phase | Andresen, Henrike | According to Brown-Peterson et al. (2011) | ||
| 19 | Maturity score | Maturity | Andresen, Henrike | 0: immature, 1: early developing to actively spawning | ||
| 20 | Fish eggs | Fish eggs | # | Andresen, Henrike | Gravimetric method, counting hydrated eggs according to Hunter et al. (1985, NOAA Technical Report NMFS, 36, 67-77) | Batch fecundity |
| 21 | Oocyte, diameter | Oocyte diam | mm | Andresen, Henrike | Stereo Microscope | Mean |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
22329 data points
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