التفاصيل البيبلوغرافية
| العنوان: |
Hábitos alimentarios de dos peces pelágicos Thunnus albacares y Acanthocybium solandri de la Reserva Marina de Galápagos |
| المؤلفون: |
Baque Menoscal, Jorge, Páez Rosas, Diego, Wolff, Matthias |
| المصدر: |
Revista de biología marina y oceanografía, ISSN 0717-3326, Vol. 47, Nº. 1, 2012, pags. 1-11 |
| سنة النشر: |
2012 |
| المجموعة: |
Dialnet - Portada de revistas (Universidad de La Rioja) |
| مصطلحات موضوعية: |
Trophic niche, sympatric, trophic similarity, Galapagos Islands, Nicho trófico, simpatría, similitud trófica, Islas Galápagos |
| الوصف: |
This study analyzed the trophic niche of two pelagic species that inhabit the Galapagos Marine Reserve, with the aim of understanding the interactions between these predators and other species. From June to October of 2009, 238 stomachs of Thunnus albacares and 151 of Acanthocybium solandri were analyzed from 4 specific sites of the Archipelago. Prey diversity reached an asymptotic level at 11 and 100 stomachs respectively. A total of 28 prey were found in T. albacores, in which the Humboldt squid Dosidicus gigas (36.68%) was the numerically most represented, whereas 11 prey were found in A. solandri in which the flying fish Prognichthys tringa and D. gigas were the two main prey items representing 40% of the diet. In terms of weight and frequency of occurrence, the most important prey were the squids Histioteuthis heteropsis (8.75%) and D. gigas (63.41%) for T. albacares and Trachurus sp. (19.86%) and Prognichthys tringa (1.19%) for A. solandri. The index of relative importance (IIR) confirmed the importance of these items in the diet of both predators. The trophic breadth level classifies T. albacares as a specialist - and A. solandri as a generalist predator (Levin = 0.17 and 0.65, respectively). These results suggest important differences in feeding habits in the two apparently sympatric species, which allows them to minimize interactions between species and to maintain their sympatric presence in this region. ; Este estudio analiza el nicho trófico de dos especies pelágicas presentes en la Reserva Marina de Galápagos, con la finalidad de comprender las interacciones que estos depredadores tiene con otras especies. De junio a octubre del 2009 se analizaron 238 estómagos de Thunnus albacares y 151 de Acanthocybium solandri provenientes de 4 sitios específicos del Archipiélago. La diversidad de presas alcanzó el nivel asintótico con 11 y 100 estómagos respectivamente. Un total de 28 presas fueron encontradas en T. albacares, de las cuales el calamar gigante Dosidicus gigas (36,68%) fue la presa numéricamente ... |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
Spanish; Castilian |
| العلاقة: |
https://dialnet.unirioja.es/servlet/oaiart?codigo=5240576Test; (Revista) ISSN 0717-3326 |
| الإتاحة: |
https://dialnet.unirioja.es/servlet/oaiart?codigo=5240576Test |
| حقوق: |
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| رقم الانضمام: |
edsbas.10E98217 |
| قاعدة البيانات: |
BASE |
