Muelbert, Jose H; de Macedo-Soares, Luis Carlos Pinto; Favareto, L R; Costa, M D P (2018): Ichthyoplankton composition form CONVERSUT cruise 3, Southern Brazilian Shelf, in 1981 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.884644, In: Muelbert, JH et al. (2018): Ichthyoplankton surveys in the southern Brazilian region from 1970 to 2010 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.884342
Always quote citation above when using data! You can download the citation in several formats below.
Related to:
Cordeiro, T A; Montú, M (1991): Distribuição dos Siphonophorae: Calycophorae (CNIDARIA) em relação às massas de água ao largo dos estados do Paraná e de Santa Catarina, Brasil (28°S - 31°S). Nerítica, 6(1-2), 107-126
Hubold, Gerd (1980): Hidrography and plankton off Southern Brazil and Rio de La Plata, August-November 1977. Atlântica, 4, 1-22
Hubold, Gerd (1980): Second report on hidrography and plankton off Southern Brazil and Rio de La Plata, Autumn Cruise: April-June 1978. Atlântica, 4, 23-42
Hubold, Gerd (1982): Eggs and larvae of Engraulis anchoita Hubbs And Marini, 1935 in the Southwest Atlantic between 25°S and 40°S. Meeresforschung, 29, 208-218, https://doi.org/10.2312/meeresforschung_29_208-218
Hubold, Gerd; Ehrlich, M D (1981): Distribution of eggs and larvae of five Clupeoid fish species in the Southwest Atlantic between 25°S And 40°S. Meeresforschung, 29, 17-29, https://doi.org/10.2312/meeresforschung_29_17-29
Coverage:
Median Latitude: -33.715328 * Median Longitude: -50.981022 * South-bound Latitude: -40.570000 * West-bound Longitude: -56.220000 * North-bound Latitude: -25.660000 * East-bound Longitude: -46.400000
Date/Time Start: 1981-01-23T01:55:00 * Date/Time End: 1981-04-11T00:00:00
Minimum DEPTH, water: 5 m * Maximum DEPTH, water: 315 m
Event(s):
Conversut_3_5660 (23_5660) * Latitude: -39.370000 * Longitude: -55.080000 * Date/Time: 1981-01-23T01:55:00 * Campaign: Conversut_3 * Basis: Almirante Saldanha * Method/Device: Hensen net (HNET)
Conversut_3_5661 (23_5661) * Latitude: -39.950000 * Longitude: -54.370000 * Date/Time: 1981-01-23T09:50:00 * Elevation: -2683.0 m * Campaign: Conversut_3 * Basis: Almirante Saldanha * Method/Device: Hensen net (HNET)
Conversut_3_5662 (23_5662) * Latitude: -40.570000 * Longitude: -53.530000 * Date/Time: 1981-01-24T00:18:00 * Elevation: -5208.0 m * Campaign: Conversut_3 * Basis: Almirante Saldanha * Method/Device: Hensen net (HNET)
Comment:
The Convergência Subtropical (CONVERSUT) cruise series was conducted by the Departamento de Hidrografia e Navegação (DHN) from the Brazilian Navy on board the Oceanographic Ship (NOc.) Almirante Saldanha. The project objective was to determine the western boundary of the South Atlantic Subtropical Convergence in different times of the year (Hubold, 1980a, 1980b, Cordeiro & Montu, 1991). The first cruise of the series (CONVERSUT_1) was carried out between August and November 1977, between Ilha do Mel (25°S) and Mar del Plata (Argentina, 40°S), resulting in 24 transects perpendicular to the coast and 200 oceanographic stations spaced about 30 nautical miles (~ 55 km) apart. Sampling ranged from the coastal region to the oceanic region, approximately 300 nautical miles away from the coast (Hubold, 1980a). Samples from the second cruise (CONVERSUT_2) were conducted between southern Santa Catarina Island (28°S) and southern region of Mar del Plata (Argentina, 48°30'S) from April to June 1978. Twenty-one transects were performed resulting in 180 oceanographic stations, covering an area that stretched up to 250 nautical miles (463 km) toward the ocean (Hubold, 1980b). The 153 stations on the third cruise of the series (CONVERSUT_3) were the result of 24 transects between Ilha do Mel (25°S) and Mar del Plata (Argentina, 40°S) during the period between January and April 1981 (Cordeiro & Montu, 1991).
Two sampling strategies were employed in the first two cruises, oblique and vertical trawls at each station, while in the third cruise only oblique trawls were performed. A conical plankton net (Hensen type) with 0.80 m of mouth diameter, 2.6 m of total length and 250 µm of mesh was used (Hubold, 1980a; Cordeiro & Montu, 1991). For technical reasons, in the second cruise, a Hensen-type network with 0.60 m diameter was used in the oblique trawls (Hubold, 1980b; Hubold, 1982). The oblique and vertical trawls were driven from 200 m depth to the surface, or from within 1-5 m from the bottom in shallow areas. The average velocity during the descent of the net in oblique trawls was 0.5 ms-1, reaching 2 ms-1 on the rise, while in vertical trawls velocity was 1 ms-1 (Hubold, 1982). Flowmeters were coupled in all nets to determine the volume of filtered water in each trawl. Samples were fixed and preserved in buffered formaldehyde solution diluted in sea water with a final approximate concentration of 4% (Hubold & Ehrlich, 1981). The filtered volume was calculated and used to standardize the abundance of fish eggs and larvae per 100 m3 of filtered water.
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | Muelbert, Jose H | |||
2 | Date/Time of event | Date/Time | Muelbert, Jose H | |||
3 | Latitude of event | Latitude | Muelbert, Jose H | |||
4 | Longitude of event | Longitude | Muelbert, Jose H | |||
5 | Depth, bathymetric | Bathy depth | m | Muelbert, Jose H | ||
6 | Distance | Distance | km | Muelbert, Jose H | from shore | |
7 | Temperature, water | Temp | °C | Muelbert, Jose H | at surface | |
8 | Salinity | Sal | Muelbert, Jose H | at surface, PSU | ||
9 | Volume | Vol | m3 | Muelbert, Jose H | filtered | |
10 | Zooplankton, biovolume | Zooplankton biovol | µm3/ml | Muelbert, Jose H | ||
11 | Fish eggs | Fish eggs | # | Muelbert, Jose H | ||
12 | Fish larvae | Fish larv | # | Muelbert, Jose H | ||
13 | Fish eggs | Fish eggs | #/m3 | Muelbert, Jose H | abundance at station | |
14 | Fish larvae | Fish larv | #/m3 | Muelbert, Jose H | abundance at station | |
15 | Order | Order | Muelbert, Jose H | |||
16 | Family | Family | Muelbert, Jose H | |||
17 | Species | Species | Muelbert, Jose H | |||
18 | Number of species | Spec No | # | Muelbert, Jose H | of fish eggs | |
19 | Number of species | Spec No | # | Muelbert, Jose H | of fish larvae | |
20 | Fish eggs | Fish eggs | #/m3 | Muelbert, Jose H | per species or taxon | |
21 | Fish larvae | Fish larv | #/m3 | Muelbert, Jose H | per species or taxon | |
22 | Flag | Flag | Muelbert, Jose H | 1 = beginning of new station, 0 = same station as above | ||
23 | Method comment | Method comm | Muelbert, Jose H | haul type: OB = oblique trawl | ||
24 | DEPTH, water | Depth water | m | Muelbert, Jose H | Geocode – haul depth, = the actual depth of the haul (vertical, oblique or horizontal haul), OR the depth range in case of stratified hauls. E.g. the net went down to 250m and it was hauled to 100m depth, so haul depth is 150m (250-100) | |
25 | Method comment | Method comm | Muelbert, Jose H | station type: PKT = plankton trawl station, CTD = CTD station | ||
26 | Transect | Transect | Muelbert, Jose H | |||
27 | Device type | Device | Muelbert, Jose H | net |
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