Andrés Beita | Memorial University of Newfoundland (original) (raw)

Papers by Andrés Beita

Research paper thumbnail of Coordinated hunting behaviors of mixed-species groups of piscivores and associated species at Isla del Coco National Park (Eastern Tropical Pacific

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Research paper thumbnail of Cuando la conservación no puede seguir el ritmo del desarrollo: Estado de salud de los ecosistemas coralinos del Pacífico Norte de Costa Rica

Revista de Biología Topical, 2018

When conservation can't keep up with development´s pace: Health status of coral ecosystems in th... more When conservation can't keep up with development´s pace: Health status of coral ecosystems in
the North Pacific of Costa Rica. Coral reefs are diverse and productive ecosystems, despite this, they are being
threatened by human activities that enhance the detrimental impact of the natural phenomenon’s like Harmful
Algal Blooms (HAB). The north Pacific of Costa Rica has been characterized as one of the best regions for the
coral reefs development in the country. However, many of these ecosystems are being lost as a result of eutrophication, overfishing, invasive species and others impacts that affect the region. In the present study, live coral
cover in the north Pacific was 5.0 ± 10.4(s.d.) %, with a domination in the ecosystems by turf algae. Twenty-six
invertebrate taxa were registered in the region with the predominance of the sea urchin Diadema mexicanum.
Ninety-four species of reef fish were identified. Snappers and some planktivores species were the groups with
the highest frequency and abundance. The localities previously studied in the 1990 decade, presented a mean live
coral cover between 40-50 %, whereby the actual state of the reef reflect a significant deterioration. This decline
in coral cover is due to natural events like the El Niño, as well as the decrease in water quality in the region. In
recent years, proliferations of the invasive seaweed Caulerpa sertularioides and high densities of bioerosive sea
urchins have been reported, mainly associated with HAB events. Likewise, fish communities have low biomass,
especially in the vicinity of fishing villages. The state of the reefs in the North Pacific is worrying and requires
actions for its recovery and conservation, for which there must be better planning of the development of projects
and activities on the coast.

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Research paper thumbnail of Anomalous coloration of a yellow tail damselfish Stegastes arcifrons (Actinopterygii: Pomacentridae) at Isla del Coco National Park, Costa Rica

Revista de Biología Tropical, 2016

Coloration patterns of reef fishes are an important trait for mediating intra and interspecific i... more Coloration patterns of reef fishes are an important trait for mediating intra and interspecific interactions, as well as for taxonomic identifications. Here we report a specimen of Stegastes arcifrons that presented
a previously unobserved and anomalous color variation on a coral reef at Isla del Coco, Pacific Costa Rica.
This color variation is known as xanthism and has been reported in some damselfishes, usually associated with
genetic anomally

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Research paper thumbnail of Ecosistemas coralinos del Área de Conservación Osa, Costa Rica: estructura y necesidades de conservación

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Research paper thumbnail of Actividades pesqueras dependientes de la ictiofauna en el Pacífico Norte de Costa Rica

Revista de Biología Tropical, 2014

Economic activities that depend on ichthyofauna in the North Pacific of Costa Rica. The North Pac... more Economic activities that depend on ichthyofauna in the North Pacific of Costa Rica. The
North Pacific of Costa Rica is characterized by a large diversity of fish species. This diversity sustains two of
the main economic activities developed there: fishing and tourism. We synthesized information from: semistructured
interviews with local stakeholders, biodiversity database from the Museo de Zoología, Universidad
de Costa Rica, landings database from Costa Rican government (INCOPESCA) and the literature. A total of 424
fish species are reported from the area and the main target species for each fishery are: mahi-mahi, silky shark,
hammerhead shark, tuna, sailfish, swordfish for longline fisheries; snappers, croakers, snook and groupers for
artisanal fisheries; invertebrates and ornamental fish in dive-fisheries; shrimp in trawl fisheries; and wahoo,
yellow-fin tuna, rooster fish, mahi-mahi, swordfish, sailfish, marlin in tourism fisheries. INCOPESCA does
not take into account fishing effort but most species landings are decreasing, especially mahi-mahi, groupers
and snappers. Conflicts between fisheries and tourism are arising due to competition for resources and overexploitation.
The main conflicts found were: (1) between sport and longline fisheries, (2) between recreational
diving and dive-fisheries, (3) between the artisanal and shrimp trawling fisheries, and (4) among artisanal fishermen
from different zones of the Pacific. These conflicts demonstrate the urgency of developing and effectively
implementing management strategies that will guarantee the sustainability of fish resources in the area. Future
studies should focus on generating information that will guide and support these management efforts

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Research paper thumbnail of Coordinated hunting behaviors of mixed-species groups of piscivores and associated species at Isla del Coco National Park (Eastern Tropical Pacific

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Research paper thumbnail of Cuando la conservación no puede seguir el ritmo del desarrollo: Estado de salud de los ecosistemas coralinos del Pacífico Norte de Costa Rica

Revista de Biología Topical, 2018

When conservation can't keep up with development´s pace: Health status of coral ecosystems in th... more When conservation can't keep up with development´s pace: Health status of coral ecosystems in
the North Pacific of Costa Rica. Coral reefs are diverse and productive ecosystems, despite this, they are being
threatened by human activities that enhance the detrimental impact of the natural phenomenon’s like Harmful
Algal Blooms (HAB). The north Pacific of Costa Rica has been characterized as one of the best regions for the
coral reefs development in the country. However, many of these ecosystems are being lost as a result of eutrophication, overfishing, invasive species and others impacts that affect the region. In the present study, live coral
cover in the north Pacific was 5.0 ± 10.4(s.d.) %, with a domination in the ecosystems by turf algae. Twenty-six
invertebrate taxa were registered in the region with the predominance of the sea urchin Diadema mexicanum.
Ninety-four species of reef fish were identified. Snappers and some planktivores species were the groups with
the highest frequency and abundance. The localities previously studied in the 1990 decade, presented a mean live
coral cover between 40-50 %, whereby the actual state of the reef reflect a significant deterioration. This decline
in coral cover is due to natural events like the El Niño, as well as the decrease in water quality in the region. In
recent years, proliferations of the invasive seaweed Caulerpa sertularioides and high densities of bioerosive sea
urchins have been reported, mainly associated with HAB events. Likewise, fish communities have low biomass,
especially in the vicinity of fishing villages. The state of the reefs in the North Pacific is worrying and requires
actions for its recovery and conservation, for which there must be better planning of the development of projects
and activities on the coast.

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Research paper thumbnail of Anomalous coloration of a yellow tail damselfish Stegastes arcifrons (Actinopterygii: Pomacentridae) at Isla del Coco National Park, Costa Rica

Revista de Biología Tropical, 2016

Coloration patterns of reef fishes are an important trait for mediating intra and interspecific i... more Coloration patterns of reef fishes are an important trait for mediating intra and interspecific interactions, as well as for taxonomic identifications. Here we report a specimen of Stegastes arcifrons that presented
a previously unobserved and anomalous color variation on a coral reef at Isla del Coco, Pacific Costa Rica.
This color variation is known as xanthism and has been reported in some damselfishes, usually associated with
genetic anomally

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Ecosistemas coralinos del Área de Conservación Osa, Costa Rica: estructura y necesidades de conservación

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Research paper thumbnail of Actividades pesqueras dependientes de la ictiofauna en el Pacífico Norte de Costa Rica

Revista de Biología Tropical, 2014

Economic activities that depend on ichthyofauna in the North Pacific of Costa Rica. The North Pac... more Economic activities that depend on ichthyofauna in the North Pacific of Costa Rica. The
North Pacific of Costa Rica is characterized by a large diversity of fish species. This diversity sustains two of
the main economic activities developed there: fishing and tourism. We synthesized information from: semistructured
interviews with local stakeholders, biodiversity database from the Museo de Zoología, Universidad
de Costa Rica, landings database from Costa Rican government (INCOPESCA) and the literature. A total of 424
fish species are reported from the area and the main target species for each fishery are: mahi-mahi, silky shark,
hammerhead shark, tuna, sailfish, swordfish for longline fisheries; snappers, croakers, snook and groupers for
artisanal fisheries; invertebrates and ornamental fish in dive-fisheries; shrimp in trawl fisheries; and wahoo,
yellow-fin tuna, rooster fish, mahi-mahi, swordfish, sailfish, marlin in tourism fisheries. INCOPESCA does
not take into account fishing effort but most species landings are decreasing, especially mahi-mahi, groupers
and snappers. Conflicts between fisheries and tourism are arising due to competition for resources and overexploitation.
The main conflicts found were: (1) between sport and longline fisheries, (2) between recreational
diving and dive-fisheries, (3) between the artisanal and shrimp trawling fisheries, and (4) among artisanal fishermen
from different zones of the Pacific. These conflicts demonstrate the urgency of developing and effectively
implementing management strategies that will guarantee the sustainability of fish resources in the area. Future
studies should focus on generating information that will guide and support these management efforts

Bookmarks Related papers MentionsView impact