scholarly journals Spatial and temporal dynamics of the hydrology at Salinas Bay, Costa Rica, Eastern Tropical Pacific

2021 ◽  
Vol 69 (Suppl.2) ◽  
pp. S105-S126
Author(s):  
Alejandro Rodríguez ◽  
Eric-J. Alfaro ◽  
Jorge Cortés
Keyword(s):  
Costa Rica ◽  
Dissolved Oxygen ◽  
Interannual Variability ◽  
Biological Diversity ◽  
Coastal Upwelling ◽  
Temporal Dynamics ◽  
Tropical Pacific ◽  
Eastern Tropical Pacific ◽  
Chl A ◽  
Spatial And Temporal Dynamics

Introduction: Salinas Bay is located in the warm pool of the Eastern Tropical Pacific (ETP), characterized by warm, shallow surface waters, a strong and shallow thermocline, and an important biological diversity. The primary productivity of the region is influenced by the coastal upwelling, which occurs during the boreal winter as a result of the strengthening of trade winds. Objective: To study the spatial and temporal dynamics of physical and chemical parameters at seven hydrographic stations in Salinas Bay, Costa Rica, through the analysis of CTD data, and relate the warm and cold events to the regional atmospheric conditions present when measuring the data. Methods: Seven hydrographic stations, sampled at Salinas Bay between August 2008 and December 2014, were selected. The variables processed for analysis are temperature, density, salinity, oxygen, chl-a and turbidity. Once the data was processed, 42 Hovmöller kind diagrams were plotted. Results: All variables, except turbidity, presented a seasonal periodicity associated with the upwelling. In general, colder and denser waters, higher salinity and chl-a concentrations and lower dissolved oxygen values were observed during the dry season, when the upwelling was active. Whereas, during the rainy season water masses were warmer and less dense, salinity and chl-a concentrations decreased and dissolved oxygen values tended to increase. Conclusions: The spatial and temporal dynamics of the hydrology in Salinas Bay was influenced by the coastal upwelling events. The region also presented an interannual variability associated with ENSO. Seasonal and interannual variability can counteract their effects on the oceanographic parameters when they coincide temporally.

scholarly journals Distribución espacio-temporal de la temperatura, salinidad y oxígeno disuelto alrededor del Domo Térmico de Costa Rica

2016 ◽  
Vol 64 (1) ◽  
pp. 135
Author(s):  
Omar G. Lizano
Keyword(s):  
Costa Rica ◽  
Dissolved Oxygen ◽  
Water Column ◽  
Tropical Pacific ◽  
Eastern Tropical Pacific ◽  
The North ◽  
Tropical Oceans ◽  
Organic Matter Oxidation ◽  
Minimum Zone ◽  
High Concentrations

<p>The Costa Rica Thermal Dome (CRTD) is an oceanographic phenomenon in the Eastern Tropical Pacific (ETP). This is a region of very high biological productivity, resulting in high concentrations of phytoplankton, sea birds, and large pelagics, such as tunas, dolphins and whales. Few publications have looks at the station variability of the water column of the CRTD. Here, horizontal and vertical distribution of some oceanic parameters was analyzed to show the dynamics of ETP, its influence on the CRTD, climatic variations and relationships that justify their distributions. Climatological monthly mean data of Ocean Data View (ODV) from 1900 to 2009 were used to compile profiles of the water column’s temperature, salinity and dissolved oxygen, and their spatial distributions around the Costa Rica Thermal Dome (CRTD). Monthly variations of these parameters depend on the intensity and extent of ocean-meteorological phenomena in the Eastern Tropical Pacific (ETP), which are related to the north-south migration of Intertropical Convergence Zone (ITCZ). The monthly climatic variation of these variables is analyzed down to 200 m depth. Increased climate variability is found in the water column at stations north and east of the CRTD. The two stations north of the CRTD, closer to the coast, are the ones most affected by the wind in front of the Gulf of Papagayo and where the greatest monthly upwelling variation occurs in this region. The distribution and concentration of dissolved oxygen depends on the ocean-atmospheric dynamics. Oxygen is consumed by respiration and organic matter oxidation around CRTD. Moreover, this is one of the regions of the tropical oceans where an Oxygen Minimum Zone (OMZ) exist, which is related also to poor water circulation or lack ocean ventilation. Sources of dissolved oxygen are linked with sub-surface currents coming from the west and from the south of the geographic equator.</p><div> </div>

Assessing the vulnerability of demersal elasmobranchs to a data-poor shrimp trawl fishery in Costa Rica, Eastern Tropical Pacific

2018 ◽  
Vol 217 ◽  
pp. 321-328 ◽  
Author(s):  
Tayler M. Clarke ◽  
Mario Espinoza ◽  
Raquel Romero Chaves ◽  
Ingo S. Wehrtmann
Keyword(s):  
Costa Rica ◽  
Tropical Pacific ◽  
Eastern Tropical Pacific ◽  
Trawl Fishery ◽  
Shrimp Trawl

scholarly journals A new Lepeophtheirus (Copepoda: Siphonostomatoida: Caligidae) from Isla del Coco National Park, Costa Rica, Eastern Tropical Pacific

2017 ◽  
pp. 235-242
Author(s):  
Eduardo Suárez-Morales ◽  
Rebeca Gasca
Keyword(s):  
New Species ◽  
Costa Rica ◽  
National Park ◽  
Relative Length ◽  
Tropical Pacific ◽  
Costa Rican ◽  
Tropical Region ◽  
Nominal Species ◽  
Eastern Tropical Pacific ◽  
Genital Complex

Among the several groups of copepods that are teleost parasites, the siphonostomatoid family Caligidae is by far the most widespread and diverse. With more than 108 nominal species, the caligid genus Lepeophtheirus von Nordmann is one of the most speciose. There are no reports of this genus in Costa Rican waters. A new species of Lepeophtheirus is herein described based on female specimens collected from plankton samples in waters off Bahía Wafer, isla del Coco, an oceanic island in the Eastern Tropical Pacific. The new species, L. alvaroi sp. nov., has some affinities with other congeners bearing a relatively short abdomen, a wider than long genital complex and a 3-segmented exopod of leg 4. it differs from most of these species by the presence of an unbranched maxillular process and by the relative lengths of the terminal claws of leg 4, with two equally long elements. it is most closely related to two other Eastern Pacific species: L. dissimulatus Wilson, 1905 and L. clarionensis Shiino, 1959. it differs from these species by the proportions and shape of the genital complex, the shape of the sternal furca, the relative length of the maxillar segments, the absence of a pectiniform process on the distal maxillar segment, the length of leg 4 and the armature of leg 5. The new species represents the first Lepeophtheirus described from Costa Rican waters of the Pacific. The low diversity of this genus in this tropical region is explained by its tendency to prefer hosts from temperate latitudes. Until further evidence is found, the host of this Lepeophtheirus species remains unknown. Citation: Suárez-Morales, E. & R. Gasca. 2012. A new Lepeophtheirus (Copepoda: Siphonostomatoida: Caligidae) from isla del Coco National Park, Costa Rica, Eastern Tropical Pacific. Rev. Biol. Trop. 60 (Suppl. 3): 235-242. Epub 2012 Dec 01.

scholarly journals Ophioderma hendleri sp. nov. (Echinodermata: Ophiuroidea: Ophiodermatidae) and its congeners from the Eastern Pacific

2020 ◽  
Vol 729 ◽  
Author(s):  
Rebeca Granja-Fernández ◽  
Tania Pineda-Enríquez ◽  
Francisco Alonso Solís-Marín ◽  
Alfredo Laguarda-Figueras
Keyword(s):  
Costa Rica ◽  
Original Description ◽  
Tropical Pacific ◽  
Distribution Range ◽  
Eastern Pacific ◽  
Type Material ◽  
Valid Species ◽  
Eastern Tropical Pacific ◽  
The World ◽  
Cocos Island

The widespread Ophioderma hendleri sp. nov., from the Eastern Tropical Pacific (Mexico to Colombia) is distinguished from its congeners by having radial shields covered by granules, naked adoral shields, up to 11 arm spines, and by its brown and beige coloration. Ophioderma hendleri sp. nov. belongs to the group of species with naked adoral shields (i.e., O. pentacanthum H.L. Clark, 1917, O. variegatum Lütken, 1856), and it has frequently been misidentified as O. panamense Lütken, 1859 or O. variegatum. Therefore, the main aim of the present work was to describe Ophioderma hendleri sp. nov. and differentiate it from its congeners. The original description of O. panamense was incomplete; thus, we provide a redescription. Due to the confusion in previous designations of its type material, we designate a lectotype and paralectotype of O. variegatum. Finally, we expand the distribution range of O. pentacanthum to Cocos Island, Costa Rica. With this work, the total number of valid species of Ophioderma Müller & Troschel, 1840 in the world increases to 33 and in the Eastern Pacific to nine species.

scholarly journals Facilitative behavioral interactions between deepwater piscivores at Isla del Coco National Park and Las Gemelas Seamount, Costa Rica

2016 ◽  
Vol 64 (1) ◽  
pp. 187 ◽  
Author(s):  
Peter J. Auster ◽  
Astrid Sánchez-Jiménez ◽  
Jesús A. Rodríguez-Arrieta ◽  
Andrés J. Quesada ◽  
Cinthya Pérez ◽  
...  
Keyword(s):  
Costa Rica ◽  
Ad Hoc ◽  
Time Frame ◽  
Tropical Pacific ◽  
Valuable Insight ◽  
Apex Predators ◽  
Eastern Tropical Pacific ◽  
Behavioral Interactions ◽  
Conservation Actions ◽  
Patterns And Processes

<p>The shallow waters around Isla del Coco, Costa Rica, have the highest density of apex predators within the Eastern Tropical Pacific. This represents a unique opportunity to assess the structure of predatory interactions in a community relatively unimpacted by fishing. Facilitation of predation has commonly been observed in shallow reef systems, limited in depth by observations via scuba divers. Here we present a preliminary catalog of facilitative behavioral interactions between 12 taxa of deepwater piscivores at Isla del Coco and Las Gemelas Seamount in the Eastern Tropical Pacific, collected via video from submersible vehicles to depths of approximately 311 m from 2002-2012. Observations were ad hoc and likely represent only a portion of the web of interactions that occur in this ecological setting. That such interactions can be observed to 300 m during the narrow time frame of submersible dives suggests that direct behavioral facilitation of piscivory may play a significant role in the apex predator guild of deepwater fishes. Investigating the extent and population-community consequences of such interactions will provide valuable insight into patterns and processes that occur in communities protected from direct fisheries as well as focus conservation actions. Rev. Biol. Trop. 64 (Suppl. 1): S187-S196. Epub 2016 February 01.</p><p> </p>

New records of Rheumatobates Bergroth (Hemiptera: Heteroptera: Gerridae) from the Pacific coast of Colombia and Costa Rica, with a key to males of Rheumatobates in the Eastern Tropical Pacific

Zootaxa ◽  
2012 ◽  
Vol 3427 (1) ◽  
pp. 33 ◽  
Author(s):  
DORA N. PADILLA-GIL ◽  
BERNALD PACHECO-CHAVES
Keyword(s):  
Costa Rica ◽  
Pacific Coast ◽  
New Records ◽  
Tropical Pacific ◽  
Adult Males ◽  
Eastern Tropical Pacific ◽  
Ecological Data ◽  
The Pacific

Three species of the genus Rheumatobates, R. peculiaris, R. longisetosus, and R. probolicornis are recorded from the Pacific coast of Colombia, municipality of Tumaco (department of Nariño); and R. bergrothi is recorded from the Pacific coast of Costa Rica; the macropterous morph of R. longisetosus is described, ecological data are provided and it is included together with other four species in a key to adult males from Eastern Tropical Pacific; the male habitus for six species is illustrated.

Sign in / Sign up

Export Citation Format

Share Document