رسالة جامعية
Habitats and nekto-benthic communities of the bottom-trawl fishery developed on the continental shelf of the Balearic Islands
| العنوان: | Habitats and nekto-benthic communities of the bottom-trawl fishery developed on the continental shelf of the Balearic Islands |
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| المؤلفون: | Ordines, F. (Francesc) |
| المساهمون: | Massutí, E. (Enric) |
| بيانات النشر: | Universitat de les Illes Balears Centro Oceanográfico de Baleares |
| سنة النشر: | 2015 |
| المجموعة: | Instituto Español de Oceanografía: e-IEO |
| مصطلحات موضوعية: | bottom trawl, macro-epibenthic communities, habitats, demersal species, hydrodynamics, benthic landscape, habitat associated species, habitat selection, essential fish habitats, life history, body condition, by-catch fish species, continental shelf, multi-species fishery, codend mesh selectivity, discards, Balearic Islands |
| جغرافية الموضوع: | Mediterranean Sea, Western Mediterranean Sea, Balearic Sea |
| الوقت: | 2003-2015 |
| الوصف: | Director de la tesis doctoral: Dr. Massutí, E. (Enric). Ponente de la tesis doctoral: Dr. Bosch, R. (Rafael) ; Summary: The presence of biogenic benthic habitats in the continental shelf of the Balearic Islands is well known. In the circalittoral, outstanding due to their presence, the following can be found: the bottoms of calcareous red algae of the Corallinaceae family (known as maërl beds), considered particularly sensitive to the anthropogenic impacts; the crinoids beds, considered an essential habitat for the vital cycle of the fishing resources; or the Peyssonnelia beds, characterized by high biomasses of soft red algae, mainly of the Peyssonnelia genus. The bottom trawl fishery, developed in the continental shelf of the Archipelago takes place in these types of bottoms. In spite of this, and the negative effects of bottom trawling on benthic habitats, in the Balearic Islands, there is little information on the relationships between these habitats and the exploited species, whose biology and exploitation state is also unknown for the majority. This doctoral thesis studies the benthic habitats and the nekto-benthic communities exploited by the bottom trawl fishery developed on the continental shelf of the Balearic Islands. The main objectives include determining: the relationship between habitats and fishing resources, the main factors affecting the distribution of both, and how the presence of the main biogenic habitats affects the physiological condition of the associated fish species characterizing them. For the first time, the biology and exploitation state of some of the fishing resources characterizing these bottoms is studied, as well as the effect of changing the mesh geometry in the codend of the bottom trawl gears, from diamond to square, on the selectivity of this fishery. The results highlight that the presence of maërl and Peyssonnelia beds in the bottom trawl fishing grounds of the shallow shelf, and the crinoid beds in those of the deep shelf, is an important factor for the distribution of ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| العلاقة: | http://hdl.handle.net/10508/10097Test; Universitat de les Illes Balears. Palma (España): 2015-206 |
| الإتاحة: | http://hdl.handle.net/10508/10097Test |
| حقوق: | Atribución-NoComercial-SinDerivadas 3.0 España ; http://creativecommons.org/licenses/by-nc-nd/3.0/esTest/ ; open access |
| رقم الانضمام: | edsbas.BCCC00CB |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |