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Monday, July 25, 2011

Animal Rescue V:White-throated Magpie-Jay





We have had a small success at Estacion Biologica FUNDECI/GAIA. Our care of a sick, nearly dead White-throated Magpie-Jay (Calocitta formosa), has resulted in a healthy, juvenile feeding on his own, and living as an active part of the forest in Laguna de Apoyo Nature Reserve. The volunteers who took care of him named him Heinz, and it even seems that he responds to his name. Heinz has been the subject of earlier blog entries. But one doesn't have to call him by his name to receive a visit from him. Heinz still makes a habit of dropping in on folks in the dining room without prior warning.
birdwatching Nicaragua Calocitta formosa mariposa
Photo by Anne Sutton.
His gregarious and engaging character is characteristic of his species and of all the birds of the family Corvidae, which includes the crows. Heinz is attracted to people, and also to shiny or colorful objects. He often drops in on someone to steal a pen cap, cigarette lighter, or anything metallic. He readily steals food from unattended plates and now that he is a few months old and independent, he has become so bold as to spar over the beans on one's fork as they are being transported from plate to mouth. He allows and even encourages petting, head-scratching, and all kinds of handling.

Apoyo Cultural Center
Photo by Anne Sutton.
Although one might find his antics entertaining, it is time that he stop visiting us and be a truly wild bird in our forest. Although he still begs for the favorite foods, cooked red beans and dog food pellets, he mostly feeds himself in the wild today. He has already joined a flock and spends most of his day with other birds. We saw him last week with the carcass of another bird, which was a good sign-he is a predator and that is what he is supposed to do, as gruesome as it may appear. He also found a wild pitahaya (Hylocereus costarricensis), an amazing fruit in its own right for humans! He appeared later with red stains all along his face and throat. He is doing fine and soon enough, he will brighten his plumage and begin to mate. 
environmental volunteer Mariposa Nicaragua
Photo by Anne Sutton.
Laguna de Apoyo Nature Reserve is practically at the southern end of the range of this species, but they are abundant throughout the area. They entertain in the forest, traveling in very vocal social groups, active even in the early afternoon when other birds may be resting. Birdwatchers love them. We have enjoyed Heinz' company, but soon he will be just another hurraca in the forest for us. And of course, there will be yet another animal to save.

Saving Heinz was the work of volunteers at Estacion Biologica, all of whom executed other projects such as reforestation of degraded natural areas while caring for this chick. If you would like to volunteer with us, please let us know.

animal rehabilitation Nicaragua
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Tuesday, July 19, 2011

The birds of Laguna de Apoyo Nature Reserve I: Resident birds





In this photography by our bird monitoring volunteer Joe Taylor, we see that the birds of Laguna de Apoyo Nature Reserve are truly esthetic beings. These photos were taken on mist netted birds while they were being processed by FUNDECI/GAIA staff, prior to returning to the wild. They show some of the wonderful details that we may never appreciate even as birdwatchers. Our technicians gather data on the bird populations by mist netting which is very important for conservation efforts, but we also enjoy the esthetic experience of admiring the birds from near. The birds were photographed in Laguna de Apoyo Nature Reserve, where all of them reproduce. We hope you enjoy them as much as we do.
birdwatching Nicaragua
Lesser Ground-Cuckoo (Morococcyx erythropygus) in Laguna de Apoyo Nature Reserve, Nicaragua. Photo by Joe Taylor.
Several cuckoo species are found in Laguna de Apoyo Nature Reserve, and they are not, at first sight, very similar birds. The Lesser Ground-Cuckoo (Morococcyx erythropygus) occupies degraded areas, and spends most of its time walking through low brush, on the ground. It is heard much more often than seen, giving a sound much like an insistent police whistle repeating. Folks here call it the "pajaro reloj" or the clock bird, because its call is reputed to be given on the hour, every hour. It nests on the ground, and its existence is threatened by domestic cats. Please don't bring cats into natural areas like this one! The Lesser Ground-Cuckoo is nothing short of spectacular when viewed up close.
birdwatching Nicaragua
Olive Sparrow (Arremonops rufivirgatus) in Laguna de Apoyo Nature Reserve, Nicaragua. Photo by Joe Taylor.
Dry tropical forest habitats usually have some grasses and other small-seeded annual plants in the many forest breaks, even when the forest is not heavily degraded by human use. Among the seed-eating birds in Laguna de Apoyo Nature Reserve is the Olive Sparrow (Arremonops rufivirgatus). The population here is not well-documented, its only reports to date being ours. We have recently spotted a nest with eggs, and two chicks hatched. This is another ground-nesting species, vulnerable to our beloved pet cats. Please keep your cats out of natural areas!

birdwatching Nicaragua
Female Long-tailed Manakin (Chiroxiphia linearis). Photo by Joe Taylor.

birdwatching Nicaragua
Immature male Long-tailed Manakin (Chiroxiphia linearis). Photo by Joe Taylor.
The Long-tailed Manakin (Chiroxiphia linearis) is the most commonly caught of all the bird species in our monitoring program. This is because we are located in prime habitat for them, in a sheltered area with lots of vegetation and food sources (they mostly eat fruit). The location is used for breeding, where males perform, quite literally, a song and dance to attract the females. Males perform the ritual in pairs, and the senior male gets the lady when she chooses the most attractive contestant. Males take up to four years to complete sexual maturity which is reflected in their plumage. We may catch as many as forty of this species in a single three-day period of mist netting.
birdwatching Nicaragua
Turquoise-browed Motmot (Eumomota superciliosa) and Blue-crowned Motmot (Momotus momota) in Laguna de Apoyo Nature Reserve, Nicaragua. Photo by Joe Taylor.
Among the emblematic birds of Nicaragua is the Turquoise-browed Motmot (Eumomota superciliosa), which is quite common throughout the Pacific region of the country. The Blue-crowned Motmot (Momotus momota) is considerably less common in most of the range. The subspecies found in Nicaragua has a black cap over the blue crown. Both motmot species nest in horizontal holes in dirt banks, and they catch flying insects on the wing as a principal component of their diet. They are both known as Guardabarrancos in Nicaragua, and the former is the national bird.
birdwatching Nicaragua
Dusky-capped Flycatcher (Myiarchus tuberculifer) in Laguna de Apoyo Nature Reserve, Nicaragua. Photo by Joe Taylor.
Lots of species of flycatchers are resident to Mesoamerica, and others migrate here from south or north. The flycatchers have bristly whiskers to help to guide their prey into the mouth. Shades of your aunt with the bristles on her chin, wanting to give you a kiss. It is not easy to distinguish them while birdwatching. Among the most common of flycatchers in Laguna de Apoyo Nature Reserve is the Dusky-capped Flycatcher (Myiarchus tuberculifer). This individual demands the last word, it appears.
birdwatching Nicaragua
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Wednesday, July 13, 2011

Mercury in the news in Nicaragua.





Mercury is used in a variety of ways in our society. Most of us "old folks" have silver fillings in our teeth which were implanted using mercury. The mercury slowly leaves the fillings and enters our body, perhaps to stay, embedded in bones and soft tissues. Gold and silver can be mined using mercury, as the mercury traps the precious minerals from dirt for easy separation.

Chlorine gas, an important industrial chemical, can be made using a technology which involves liquid mercury electrodes. This techology was once widespread, used to produce chlorine in factories throughout the United States. The US chemical company, Pennwalt, produced chlorine in Nicaragua using this technology during the 1960's, into the 1980's. The chemical plant was closed, and Pennwalt had long before left the scene and disappeared from existence.  But the remains of pollution from this plant are grievous. A small amount of research has been performed on the mercury in Nicaragua, mostly focussing on the impacts of the vast amounts (tens of tons) of mercury spilled over the years onto the ground along the shore of Lake Xolotlan (also known as Lake Managua), at what was once a chlorine production facility owned by Pennwalt.

Mercury also occurs in nature, and is often associated with volcanic activity. Nicaragua has lots of volcanoes. Estacion Biologica supported a study of mercury in the fish and water in Laguna de Apoyo, a volcanic crater lake that is considered not to be polluted with external sources of mercury, and Lake Xolotlan. We found that mercury levels in the water of Lake Xolotlan are extremely high, and a potential source is distant from the old Pennwalt site. Mercury levels are elevated in Lake Apoyo, likely from natural, volcanic sources, but these levels, much higher than lakes facing mercury fallout from coal-fired energy plants, are only one-tenth of the levels in Lake Xolotlan. Fish muscle tissue-the part we eat-in tilapia, guapote, and mojarra reached and exceeded in some cases, the indications for mercury in diet.

The article in Environmental Pollution can be found here., and a grafic is reproduced with the abstract below.

mercury contamination fish Nicaragua



________________________________________________________________________________
This article appeared in today's El Nuevo Diario (13 JULY, 2011)

Golpe letal al Xolotlán


mercury Nicaragua

* Elemento químico que lanzó Penwalt en sus aguas han provocado que el cuerpo de agua sea irrecuperable, señala biólogo * CSJ justifica su fallo de 2010, y niega cualquier responsabilidad ambiental o laboral del BCIE * Concentraciones pasan de 0.73 a 4.48, valores muy por encima de los índices de tolerancia, y se está pasando al Cocibolca

La empresa Penwalt no solo cobró la vida de 24 trabajadores y afectó a 107 de ellos con daños irreversibles, sino que provocó una acumulación de 600 toneladas de mercurio en el lago Xolotlán.

Según explica el ecólogo y biólogo Kamilo Lara, el rango de concentración de mercurio detectado en el lago Xolotlán, ha variado de 0.73 a 4.48, según el sitio donde se han tomado las muestras.
Pero todos los sitios estudiados reportaron concentraciones por encima del valor establecido por las guías técnicas, que es de 0.1 microgramos de mercurio, el estándar permisible en un medio acuático para no provocar daños ambientales o sanitarios.
Los primeros niveles fueron encontrados a kilómetros de la planta, los segundos en las inmediaciones de la misma.
“Desgraciadamente, en esa época no existía la preocupación ni la legislación ambiental de hoy, por eso no manejamos las cifras de cuando la planta estaba operando. Pero si analizamos las variaciones en los niveles del contaminante, esto indica que el mercurio se está disolviendo en ciertas partes por el movimiento de las aguas, y focalizándose en las áreas cercanas a la planta”, explica Lara.
Según advierte el ecologista, esta dilución de mercurio que explica las variaciones encontradas en las distintas mediciones, es indicio de una preocupación mucho mayor.

Se está esparciendo y pasando al Cocibolca
“Es un hecho que el mercurio es una amenaza latente porque se está esparciendo del lago Xolotlán al Cocibolca a través del río Tipitapa, que sirve como vaso comunicante. Por eso las mediaciones están variando”
“Los valores encontrados en los sedimentos infiltrados por mercurio en el lago Xolotlán, fueron generados por las emanaciones atmosféricas de la industria Penwalt desde la década de los 80. En esa época, descubrimos que todas las pilas de la planta estaban llenas del material contaminante. Se limpiaron, se rasparon y se empacó el toxafeno (plaguicida) vencido en tanques de 55 galones, pero este fue un proceso que sólo abarcó el plaguicida que estaba acumulado dentro de la planta o infiltrado en el suelo, no en el lago, porque se suponía que el BCIE, al asumir el pasivo laboral, también iba a asumir la limpieza del lago, pero no lo hizo”
El mercurio puede existir enterrado a profundidad y ser liberado de los sedimentos hacia el agua. Este proceso depende del grado de acidez, el cual ejerce una marcada influencia en las posibilidades de disolución y movilización de este metal desde los sedimentos hasta la columna de agua.
“Los movimientos de mercurio en el lago a través de las variaciones en el ph (grado de acidez) están controlando los procesos de adherencia del mercurio a las piedras y granulaciones del suelo, y el desprendimiento del mismo, explicando su esparcimiento al Cocibolca”, explica Kamilo Lara

Penwalt también afectó Miraflores
Según el ecólogo Kamilo Lara, la presencia de mercurio en el litoral del lago, probablemente se deba a la proximidad  con la Bahía Sur, donde se dio una contaminación mercurial en el sitio conocido como Bahía de Miraflores, donde se derramaban directamente los desechos tóxicos.
Aquí se reportaron concentraciones de 7.3 a 9.2 microgramos
“Cuando la Penwalt quebró y el Banco Centroamericano de Integración Económica (BCIE) asumió la deuda y se quedó con los activos de la fábrica, estos activos ni siquiera se pudieron utilizar, ni vender  como chatarra, porque poseían una contaminación tremenda por el peligroso Toxafeno, un plaguicida encontrado, y por  los restos de mercurio”, señala Lara

Peligrosidad del químico
Según explica el ecólogo Kamilo Lara, cuando el mercurio cae al agua, se adhiere con facilidad a las proteínas que están en el cuerpo de los peces, fijándose en el cuerpo de cualquier animal que coma alimentos contaminados con mercurio. De esta forma, cuando el ser humano consume pescado contaminado, la sustancia pasa al cuerpo de las personas.
“Esto provoca diversas enfermedades, entre ellas, trastornos neurológicos muy complejos, de tal manera que a medida que se va concentrando el mercurio en el cuerpo humano las afecciones son mayores. Una vez que el mercurio atraviesa las membranas cerebrales ya no puede ser eliminado, y es por ello que la persona presenta síntomas neurológicos severos llamados Síndrome de Minamata”, añade Lara.

CSJ justifica su fallo
En la sentencia emitida por la CSJ (Corte Suprema de Justicia) el 20 de octubre de 2010, donde se negó el recurso de amparo a los 107 trabajadores de la Penwalt, esta aseguró que el Banco Centroamericano de Integración Económica no tenía responsabilidad ambiental ni laboral.
Según versa en la sentencia número 434, expediente n.º 216-02, inscrita por la Secretaría de la Sala de lo Constitucional de la Corte Suprema de Justicia:
“Las facultades de la Corte no pueden ir más allá de aquellas personas que hayan causado el daño ambiental y laboral, y en el presente caso fue la empresa Penwalt, al haber depositado grandes cantidades de mercurio en la orilla del lago Xolotlán, y no el Banco de Integración Económica, quien adquiere los bienes de la empresa por medio de ejecución judicial ante un incumplimiento de contrato mutuo con Garantía Prendaría e Hipotecaría por un préstamo de 4 millones de dólares”.
Al respecto, el abogado Álvaro Leiva Sánchez, Delegado de Derechos Humanos por la Confederación de Unidad Sindical y la Confederación Sindical de Trabajadores de las Américas, asegura que esto es una burla al sistema judicial y a los derechos de los trabajadores.
“Cuando el banco tomó los pasivos de la empresa asumió sus deberes y obligaciones, así que tiene que pagar la indemnización por daños y perjuicios y responder con acciones contundentes ante los daños ambientales. La deuda que tenía pendiente con la Penwalt no lo exime de responsabilidad, y este fallo de la Corte es una vergüenza para un sistema judicial que en vez de tutelar el derecho de los trabajadores los violenta”, asegura Leiva.

mercury
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Environ Pollut. 2006 Jun;141(3):513-8. Epub 2005 Dec 9.

Mercury in fish from two Nicaraguan lakes: a recommendation for increased monitoring of fish for international commerce.

Source

University of Central America, Apdo. 69, Managua, Nicaragua. jmccrary2@yahoo.com

Abstract

mercury Nicaragua
We measured total mercury concentrations in water and fish of Lake Managua and Lake Apoyo. Water mercury concentrations were 10-fold higher in Lake Managua than in Lake Apoyo, although differences in mercury concentration in the most common native fish were not significant. One-fourth of the commercially fished tilapia in Lake Managua exceeded maximum recommended mercury levels for consumption among pregnant women and other at-risk groups, although bioavailability to fishes was lower than in previously studied sites in Brazil and Western Maryland. The lower bioavailiability may present important information for management options to reduce mercury exposure to fishes and humans. We recommend closer mercury monitoring among freshwater fish destined for international commerce.

Saturday, July 9, 2011

Howler monkey photography by Mark de Graaf




These photos of a howler monkey family were taken in the yard of Estacion Biologica in Laguna de Apoyo Nature Reserve, Nicaragua, by a student of the Laguna de Apoyo Spanish School, Mark de Graaf. Thank you, Mark!

howler monkey Nicaragua

nature photography Nicaragua

wildlife conservation Nicaragua

wildlife photography Laguna de Apoyo

Estacion Biologica is executing a study of monkey populations in Laguna de Apoyo Nature Reserve. We need volunteers, students, and scientists. Would you like to participate? Please let us know.

Apoyo Spanish School
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Wildlife in Laguna de Apoyo Nature Reserve, Nicaragua

Among the many environmental threats facing Laguna de Apoyo Nature Reserve, crowding by humans is more than ever the most important. The cities of Granada, Masaya, San Juan de Oriente, Catarina, Diria and Diriomo are all located on its edge. Developers daily push our weak government to get permits to build houses inside the reserve. Cars, electric lines, lights, piers, houses, yards, and people themselves continue to elbow away animal habitat. The thin strip of land ringing around Laguna de Apoyo which protects the lake, also connects forest habitats from Masaya Volcano National Park to Volcano Mombacho Nature Reserve, serves as a key piece of wild nature in southwestern Nicaragua, and is at terrible risk of destruction.

Nonetheless, there are still many wild animals in the reserve. Just this week, Pablo Somarriba and Elmer Nicaragua, staff members of Estacion Biologica, observed a white-tailed deer nearby while performing bird monitoring work just a week ago. The Pale-billed Woodpecker, a glorious bird, close relative of the possibly extinct Ivory-billed Woodpecker, More than 220 species of birds are found in the reserve. Nicaragua's wildlife is easily observed here.

Although the most well-conserved forest is found in the southern section of the reserve, the immediate environment of Estacion Biologica contains plenty of wildlife. For instance, a rather large Boa constrictor was found by Spanish students taking an evening nature walk, only 3 meters from the edge of our property! Although one may be terrified of such a large animal, they are not poisonous nor are they aggressive, unless you happen to be a mouse or perhaps a chicken. We got snakes!

Boa constrictor in Laguna de Apoyo Nature Reserve, Nicaragua
Ran, a Spanish student in Apoyo Spanish School, holds a Boa constrictor. Photo by Jeffrey McCrary.
 
wildlife photography Nicaragua
Yael observes the Boa constrictor which does not visibly object to handling by Ran, making for a great wildlife photography moment. Boas are common in Laguna de Apoyo Nature Reserve, although locals kill them and any other snake on sight. Photo Jeffrey McCrary.

Calocitta formosa
This White-tailed Magpie-Jay (Calocitta formosa) chick was rescued and raised at Estacion Biologica. Photo Jeffrey McCrary.
army ants Eciton
Army ants (Eciton sp.) are regular visitors to Estacion Biologica, and they help us keep the house free of pests. Photo Jeffrey McCrary.

howler monkeys Nicaragua
Howler monkeys (Alouatta palliata) come into the yard often, especially to eat mangos! Photo Jeffrey McCrary.

ecotours nicaragua
This vesper rat (Nyctomys sumichrasti) skeleton was prepared by Pablo Somarriba and our volunteer Wyatt Reed. Photo Jeffrey McCrary.
The vesper rat (Nyctomys sumichrasti) has never before been documented to the west of the Nicaraguan Great Lakes. Staff member Elmer Nicaragua spotted two eating the achiote (Bixa orellana) fruit in his yard, and he handily collected them for us. Their skins were saved for DNA study while the skeleton of one of them was mounted. This finding is very important because no knowledge of the animal in this region exists to date.
nature tours Nicaragua
Spotted skunks are common and very cute-but don't get too close! Photo Jeffrey McCrary.
The spotted skunk (Spilogale gracilis) is not the only skunk found in the area. It is rather easily seen at night, particularly because it can usually be tracked by smell. One can get quite close, however, without risk of being sprayed. They are often found in rocky crevices such as the one found in the above photograph, which was taken on the property of Estacion Biologica.
wildlife ecotours Nicaragua
Yet another fantastic beetle found in Laguna de Apoyo Nature Reserve, Nicaragua. Photo Belen Camino.

birdwatching nature tourism
The Chestnut-capped Warbler is resident in Laguna de Apoyo Nature Reserve. Photo Jeffrey McCrary.
Most warblers found in Nicaragua are migratory, and they reproduce somewhere northward of the country. Several species of the genus Basileuterus, however, are resident, and in Laguna de Apoyo Nature Reserve, the Chestnut-capped Warbler (Basileuterus rufifrons) is common. A pair nests almost every year on the edge of our garden at Estacion Biologica, and during the dry season, these birds drink from our wash stand. They are easily found in midlevel forest, moving through thick foliage and on vines. The species is thought to be a species complex, with variations localized throughout its ample range.

These and more fauna are why we appreciate Laguna de Apoyo Nature Reserve, and why we work to keep it wild. We invite your help and good will! You can help by: 1) Studying Spanish with us at Laguna de Apoyo Spanish School. Proceeds from your classes go directly to saving wildlife and their habitats in Nicaragua; 2) volunteering to participate in our wildlife and reforestation projects; 3) donating to us-even small sums are welcome! Just US$25 dollars will fund a day of field work. We accept donations through paypal.
Nature tours Laguna de Apoyo
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