IOV Copépodos del Golfo de Cariaco, Venezuela
Citation
Marquez B, Allen Peña T, Troccoli L, Marín B (2022): IOV Copépodos del Golfo de Cariaco, Venezuela. v1.7. Caribbean OBIS Node. Dataset/Samplingevent. https://ipt.iobis.org/caribbeanobis/resource?r=iov_udo_copepoda&v=1.7 https://doi.org/10.15468/akt3bc accessed via GBIF.org on 2024-08-24.Description
An analysis of the temporal and spatial variation of the copepods with respect to its abundance and composition was carried out in the eastern zone of the Gulf of Cariaco, Sucre state, Venezuela. Monthly samples were collected (July 2009 to February 2010) from nine stations. A standard plankton net of 333 micron was used. Temperature, salinity, dissolved oxygen and chlorophyll a were measured. The temperature ranged from 23.8 -28.6ºC, the salinity from 34.5 to 38.3 and the chlorophyll between 0.01 - 25.8 mg Chlor. to m-3. The abundance of copepods varied between 7 - 4431 ind.m-3, it presented temporal and spatial differences, with the highest concentrations found in rains, in the stations closest to the eastern zone of the sac.Sampling Description
Study Extent
The eastern sector or sac of the Gulf of Cariaco, is approximately 9 km wide and 17 km long. The shallowest depths of the gulf are located in this sector, which is close to 40 meters. At its eastern end, the Carinicuao and Cariaco rivers flow out and in the south, the Oricoto and López ravines, making up the largest continental tributaries and probably the source of supply of much of the sedimentary materials deposited in the study area (Caraballo, 1982). The vegetation in this sector is characterized by the presence of mangroves and xerophytic zones.Sampling
The design to take the samples was carried out utilizing a two-stage conglomerate sampling with a subsample (Cochran, 1977), which consisted of dividing the eastern sector or the Gulf sac into three zones; within each zone, three stations were chosen at random, for a total of 9 samples per outlet. The samples were collected monthly between July 2009 and January 2010, guaranteeing representativeness in the rainy season (July- September) and drought (October-December and February), in the nine seasons in the eastern sector of the Gulf of CariacoMethod steps
- The zooplankton samples were collected at the surface level, with a standard plankton net of 333 microns was used at a speed of 3.7 km/h for 15 min. This network was equipped with a flowmeter to estimate the volume of filtered water. All samples were immediately placed in 500 mL polyurethane bottles and stored in formalin buffered with sodium tetraborate, maintaining the final concentration at 5 %.
- At each station, temperature, salinity, and surface dissolved oxygen were measured using a multi-parameter probe (YSI). Simultaneously, samples were collected in dark polyethylene bottles (2 L) for determinations of chlorophyll-a (Chlor.-a) using the spectrophotometric method described by Lorenzen modified by Strickland and Parsons (1972), the results were expressed in mg Clor.-a.m-3.
- For taxonomic determination,from the concentrated samples (400 mL), 3 sub-samples of 5 mL were obtained with a Stempel pipette, and a count and identification of adult and juvenile copepods was carried out under the lowest possible taxonomic level, using the specialized identification keys of Campos-Hernández and Suárez-Morales (1994), Suárez-Morales (1995), Bradford-Grieve et al. (1999), as well as the Razouls et al. (2005-2019). The number of organisms counted was divided by the volume of filtered water, so the results were standardized to ind.m-3.
Additional info
La transcripción y curaduría de este conjunto de datos fue posible gracias al apoyo de CaribeSur, proyecto BID-CA2020-025-NAC.Taxonomic Coverages
All copepods were identified up to species
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Acartia (Acanthacartia) tonsarank: species
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Temora turbinatarank: species
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Paracalanus quasimodorank: species
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Subeucalanus subcrassusrank: species
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Subeucalanus subtenuisrank: species
Geographic Coverages
This study was carried out in the eastern region of the Cariaco gulf, Sucre states, Venezuela
Bibliographic Citations
- Brightdoom Márquez-Rojas, Evelyn Zoppi de Roa, Luis Troccoli y Edy Montiel. 2017. Structural changes of mesozooplankton in relation to hydrographic conditions in the Gulf of Cariaco, Venezuela. Biota Colombiana 18 (1): 148-171. -
Contacts
Brightdoom Marquezoriginator
position: Researcher
Instituto Oceanografico de Venezuela
VE
email: bmarquez2001@gmail.com
userId: http://orcid.org/0000-0002-2703-8696
Thays Allen Peña
originator
Instituto Oceanografico de Venezuela
Av. Universidad
Cumana
6101
Sucre
VE
email: thayscor@yahoo.com
Luis Troccoli
originator
Instituto Oceanografico de Venezuela
Av. Universidad
Cumana
6101
Sucre
VE
email: luis.troccoli@gmail.com
Baumar Marín
originator
Instituto Oceanografico de Venezuela
Av. Universidad
Cumana
6101
Sucre
VE
email: baumarm@gmail.com
Brightdoom Marquez
metadata author
position: Researcher
Instituto Oceanografico de Venezuela
Av. Universidad
Cumana
6101
Sucre
VE
email: bmarquez2001@gmail.com
userId: http://orcid.org/0000-0002-2703-8696
Brightdoom Marquez
owner
position: Researcher
VE
email: bmarquez2001@gmail.com
Thays Allen
processor
position: Technical
VE
email: thayscor@yahoo.com
Brightdoom Marquez
administrative point of contact
position: Director
Instituto Oceanografico de Venezuela
Av. Universidad
Cumana
6101
Sucre
VE
email: bmarquez2001@gmail.com
userId: http://orcid.org/0000-0002-2703-8696