Portuguese purse seine fishery spatial and resource overlap with top predators

2019 ◽  
Vol 617-618 ◽  
pp. 183-198 ◽  
Author(s):  
L Wise ◽  
C Galego ◽  
I Katara ◽  
A Marçalo ◽  
A Meirinho ◽  
...  
Keyword(s):  
Purse Seine ◽  
Resource Overlap ◽  
Top Predators ◽  
Purse Seine Fishery

scholarly journals Interaction between small pelagic purse seine fishery and its top predators

2018 ◽  
Vol 59 (2) ◽  
pp. 185-190
Author(s):  
Barbara Zorica ◽  
Vanja Čikeš Keč ◽  
Kristijan Zanki ◽  
Leon Grubišić ◽  
Tanja Šegvić-Bubić
Keyword(s):  
Preliminary Data ◽  
Negative Impact ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Small Pelagic Fish ◽  
Fish Schools ◽  
Top Predators ◽  
Increasing Trend ◽  
Monthly Pattern ◽  
Purse Seine Fishery

Due to very good collaboration with one commercial purse seiner, using “Srdelara” and operating in fishing zone G, preliminary data concerning the interaction between small pelagic purse seine fishery and its predators were obtained. According to the notes taken by experience observer on-board in period from year 2013 to 2016, seems that tunas, dolphins and swordfish were the faithful companions of purse seiner fisherman with abundance of 68.6%, 22.0% and 9.4%, respectively. Although they were present all year round, their monthly pattern of appearance indicated that less tunas were recorded in May-June, more dolphins were noted from July to October while swordfish were mostly abundant in winter (January-March). Within the investigated period, slightly increasing trend of tuna and dolphins’ appearance was recorded, although statistically not significant. Analysing possible correlation between purse seine catches and predator’s abundances, revealed that appearance of tuna had negative impact on the catches (dispersion of schools), while realised catches in presence of dolphins were quite good so it seems that they tend to round up small pelagic fish schools.

Spatial segregation by size of billfishes bycaught by the tuna purse-seine fishery in the Eastern Pacific Ocean

2021 ◽  
Vol 241 ◽  
pp. 106001
Author(s):  
Osman Crespo-Neto ◽  
Eric Díaz-Delgado ◽  
Tatiana A. Acosta-Pachón ◽  
Raúl O. Martínez-Rincón
Keyword(s):  
Pacific Ocean ◽  
Spatial Segregation ◽  
Eastern Pacific ◽  
Purse Seine ◽  
Eastern Pacific Ocean ◽  
Purse Seine Fishery

The Spanish purse-seine fishery targeting small pelagic species in the Bay of Biscay: Landings, discards and interactions with protected species

2021 ◽  
Vol 239 ◽  
pp. 105951
Author(s):  
Jon Ruiz ◽  
Maite Louzao ◽  
Iñaki Oyarzabal ◽  
Luis Arregi ◽  
Estanis Mugerza ◽  
...  
Keyword(s):  
Purse Seine ◽  
Bay Of Biscay ◽  
Protected Species ◽  
Pelagic Species ◽  
Purse Seine Fishery

scholarly journals Biological patterns of the Brazilian sardine in the purse seine fishery off Brazil

2019 ◽  
Vol 6 ◽  
Author(s):  
Rafael Schroeder ◽  
Angelica Petermann ◽  
Alberto Correia ◽  
Paulo Schwingel
Keyword(s):  
Purse Seine ◽  
Biological Patterns ◽  
Purse Seine Fishery

The purse-seine fishery for small pelagic fishes off the Madeira Archipelago

2019 ◽  
Vol 41 (4) ◽  
pp. 373-383
Author(s):  
R Tejerina ◽  
M Hermida ◽  
G Faria ◽  
J Delgado
Keyword(s):  
Purse Seine ◽  
Pelagic Fishes ◽  
Madeira Archipelago ◽  
Purse Seine Fishery

scholarly journals Fishing Season of Large Tuna from Purse Seine Fishery in Tumumpa, Manado, North Sulawesi

2019 ◽  
Vol 23 (4) ◽  
pp. 171
Author(s):  
Bram Setyadji ◽  
Umi Chodriyah
Keyword(s):  
Ecological Niche ◽  
Operation Time ◽  
Study Data ◽  
Purse Seine ◽  
Fishing Ground ◽  
Skipjack Tuna ◽  
Fishing Season ◽  
Pelagic Fishes ◽  
North Sulawesi ◽  
Purse Seine Fishery

Knowledge on seasonal fishing pattern is essential in fisheries research in order to increase the effectiveness of fishing and at the same time protecting the fishing ground from excessive fishing practices. Determining the seasonal fishing pattern of large pelagic fishes, namely large tuna (yellowfin and bigeye), small tuna (mackerel) and skipjack tuna were the objective of this study. Data from the 2013-2015 fishing operation time series were used to analyze the fishing season using the percentage average per unit effort (CPUE) method. The main focus of this study was purse seine fishery. The research showed that high fishing season of large pelagic fishes allegedly occurred during May to July, which reached its peak on May. On the other hand, low fishing season occurred during January to April, with the lowest on March. There were similarities between large tuna, small tuna and skipjack in term of their seasonal fishing pattern, although they did not show any good correlation (r<0.5). This might due to fact that even tough large tuna, small tuna and skipjack tuna shared the same ecological niche but apparently, they did not show any interaction (symbiosis) but competition.

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