Research Project Title

The Health of an Intertidal Ecosystem Determined Through the Distribution of Two Mollusk Populations and Water Quality Testing

Session Type

Poster Presentation

Research Project Abstract

Commercial fishing practices endanger artisanal fishing in the Gulf of Nicoya area, prompting the implementation of fishing restrictions, leading locals to believe the ecosystem’s health is improving. We compared population densities of Tellinidae and Donacidae clams, and “boca morada” snails in Tárcoles, Costa Rica to data collected in 2014 and 2016. Also investigated was the distance “boca morada” snails travel in 24 hours in order to quantify locomotion of this species and we measured the valve lengths of the two clam genera for future identification. Finally, we took water samples from four locations and compared their pH, nitrate and dissolved oxygen levels. We found that the “boca morada” and Donacidae population densities have increased since 2014 while the Tellinidae decreased. We also found that some of the water quality factors tested were not within healthy ranges.

Session Number

PS3

Location

HUB Multipurpose Room

Abstract Number

PS3-m

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COinS
 
Apr 28th, 2:15 PM Apr 28th, 3:45 PM

The Health of an Intertidal Ecosystem Determined Through the Distribution of Two Mollusk Populations and Water Quality Testing

HUB Multipurpose Room

Commercial fishing practices endanger artisanal fishing in the Gulf of Nicoya area, prompting the implementation of fishing restrictions, leading locals to believe the ecosystem’s health is improving. We compared population densities of Tellinidae and Donacidae clams, and “boca morada” snails in Tárcoles, Costa Rica to data collected in 2014 and 2016. Also investigated was the distance “boca morada” snails travel in 24 hours in order to quantify locomotion of this species and we measured the valve lengths of the two clam genera for future identification. Finally, we took water samples from four locations and compared their pH, nitrate and dissolved oxygen levels. We found that the “boca morada” and Donacidae population densities have increased since 2014 while the Tellinidae decreased. We also found that some of the water quality factors tested were not within healthy ranges.