Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Seabird bycatch in Portuguese mainland coastal fisheries: an assessment through on-board observations and fishermen interviews
Oliveira, N.; Henriques, A.; Miodonski, J.; Pereira, J.; Marujo, D.; Almeida, A.; Barros, N.; Andrade, J.; Marcalo, A.; Santos, J.; Oliveira, I.B.; Araujo, H.; Monteiro, S.; Vingada, J.; Ramírez, I. (2015). Seabird bycatch in Portuguese mainland coastal fisheries: an assessment through on-board observations and fishermen interviews. Global Ecology and Conservation 3: 51-61. https://dx.doi.org/10.1016/j.gecco.2014.11.006
In: Global Ecology and Conservation. Elsevier: Amsterdam. ISSN 2351-9894; e-ISSN 2351-9894
|   |
| Trefwoorden |
|
| Author keywords |
Bycatch; Seabird; Portugal; Coastal; Fisheries |
| Auteurs | | Top |
- Oliveira, N.
- Henriques, A.
- Miodonski, J.
- Pereira, J.
- Marujo, D.
|
- Almeida, A.
- Barros, N.
- Andrade, J.
- Marcalo, A.
- Santos, J.
|
- Oliveira, I.B.
- Araujo, H.
- Monteiro, S.
- Vingada, J.
- Ramírez, I.
|
| Abstract |
Competition with fisheries and incidental capture in fishing gear are the major current threats for seabirds at sea. Fishing is a traditional activity in Portugal and is mainly composed of a great number of small vessels. Given the lack of knowledge on effects of the Portuguese fishing fleet on seabird populations, bycatch was assessed in mainland coastal waters for 2010-2012. Interviews and on-board data were divided into 5 strata, according to fishing gear: Bottom trawling, Bottom longline, Purse seine, Beach seine, Polyvalent (> 12 m) and Polyvalent (< 12 m). Polyvalent included Setnets, Traps and Demersal longlines. Overall, 68 birds were recorded to be bycaught. The average catch per unit effort (CPUE) was 0.05 birds per fishing event. Polyvalent (< 12 m), Polyvalent (>= 12 m) and Purse seiners had the biggest seabird bycatch rates, with 0.5 (CPUE = 0.1), 0.11 (CPUE = 0.05) and 0.2 (CPUE = 0.11) birds per trip, respectively. Within Polyvalent gear, Setnets captured the largest diversity of seabird species (CPUE = 0.06), while Demersal longline had the highest CPUE (0.86). Northern gannet was the most common bycaught species. Although more observation effort is required, our results suggest that substantial numbers of Balearic shearwater might be bycaught annually, mainly in Purse seine and Setnets. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
