Estado de salud y morfometría de las fragatas magníficas de Galápagos (Fregata magnificens magnificens) determinado mediante hematología, bioquímica, gases sanguíneos y examen físico

La fragata magnífica (Fregata magnificens; MFB) es un ave marina distribuida en los océanos Atlántico y Pacífico. En las Islas Galápagos habita la subespecie Fregata magnificens magnificens, nativa del archipiélago. Este estudio presenta, por primera vez, los valores hematológicos y bioquímicos sanguíneos de esta población en la región.

El objetivo de este estudio fue establecer parámetros de referencia sobre signos vitales, hematología, bioquímica sanguínea y morfometría en las Fregata magnificens magnificens. Además, se compararon estos valores con datos previamente publicados sobre poblaciones de esta ave en Brasil, y Fregata minor en las Islas Galápagos. Estos datos servirán como referencia en caso de amenazas a la población, ya sean derivadas de patógenos, efectos del cambio climático, contaminación u otros factores antropogénicos.

Photo: Alam Coss

Para esta investigación se analizaron muestras de sangre de 16 individuos adultos (10 hembras, 6 machos) de las Islas Seymour Norte y Daphne Mayor, recolectadas en junio de 2017 y julio de 2022.

Los valores hematológicos y bioquímicos de la subespecie Fregata magnificens magnificens fueron similares a los registrados en otras poblaciones de la fragata magnífica (Fregata magnificens) y fragata pelágica Fregata minor (GFB). Se encontró diferencias significativas entre machos y hembras en profundidad y ancho del pico, longitud de alas, peso y niveles de cloruro en sangre. Las hembras presentaron mayor peso y tamaño que los machos, reflejando un marcado dimorfismo  sexual. No se detectaron parásitos sanguíneos.

Los valores de referencia obtenidos serán clave para futuras comparaciones y el monitoreo de la salud de las poblaciones de la fragata magnífica en Galápagos. Las diferencias observadas en ciertos parámetros fisiológicos respecto a las poblaciones de Brasil podrían estar relacionadas con factores ambientales o metodológicos. El turismo en las Islas Galápagos continúa en aumento y podría influir en la salud de las aves marinas de la región, por ese motivo es fundamental realizar evaluaciones sanitarias para monitorear el estado de salud de las fragatas.

Para conocer más de esta investigación ingresa a: 10.7717/peerj.18609





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In 2022, the Galapagos Science Center (GSC) and the broader UNC & USFQ Galapagos Initiative will celebrate its 10th Anniversary. We are proud to announce the World Summit on Island Sustainability scheduled to be held on June 26–30, 2022 at the Galapagos Science Center and the Community Convention Center on San Cristobal Island.

The content of the World Summit will be distributed globally through social media and results documented through papers published in a book written as part of the Galapagos Book Series by Springer Nature and edited by Steve Walsh (UNC) & Carlos Mena (USFQ) as well as Jill Stewart (UNC) and Juan Pablo Muñoz (GSC/USC). The book will be inclusive and accessible by the broader island community including scientists, managers, residents, tourists, and government and non-government organizations.

While the most obvious goal of organizing the World Summit on Island Sustainability is to celebrate the 10th Anniversary of the GSC and the UNC-USFQ Galapagos Initiative, other goals will be addressed through special opportunities created as part of our operational planning of the World Summit.

For instance, we seek to elevate and highlight the Galapagos in the island conservation discourse, seeking to interact with other island networks in more obvious and conspicuous ways to benefit the Galapagos Islands, the UNC-USFQ Galapagos Initiative, and the world. We will seize the opportunity to further develop the I2N2 – International Islands Network-of-Networks. Further, we wish to highlight and emphasize multiple visions of a sustainable future for the Galapagos Islands and we cannot do this alone. Therefore, engaging the Ecuadorian Ministry of Environment, the Ministry of Tourism, the Government Council of Galapagos, the Galapagos National Park, and local Galapagos authorities, including government and non-government organizations and local citizen groups, is imperative.

The Galapagos Science Center on San Cristobal Island, Galapagos

Borrowing from Hawaii’s and Guam’s Green Growth Program and the Global Island Partnership, we wish to examine existing global programs that emphasize island sustainability and their incorporation into life, policies, and circumstances in the Galapagos Islands. We will also seek to enhance our connections with the institutional members of our International Galapagos Science Consortium and expand the Consortium through the recruitment of other member institutions. We will also work to benefit islands and their local communities by working with citizen groups as well as important NGOs who seek to improve the natural conditions in the Galapagos and diminish the impact of the human dimension on the future of Galapagos’ ecosystems.

Lastly, we will use the World Summit to benefit UNC & USFQ and our constituencies through a strong and vibrant communication plan about the World Summit, creating corporate relationships as sponsors, identifying funding goals through donors, and benefiting our study abroad program for student engagement in the Galapagos Islands. We plan to develop and issue a Galapagos Sustainability Communique after the World Summit that includes the vision and insights of all its participants for a sustainable Galapagos with applicability to global island settings.

We are eager to hear your perspective and have you join us at the World Summit on Island Sustainability!