scholarly journals Species Composition and Seasonal Variations of the Shrimp Beam Trawl Fisheries in the Adjacent Waters Geomundo, Korea

2003 ◽  
Vol 39 (1) ◽  
pp. 63-76 ◽  
Keyword(s):  
Species Composition ◽  
Seasonal Variations ◽  
Beam Trawl ◽  
Trawl Fisheries

Fluctuations in abundance and Species composition of fishes collected by beam trawl Fisheries in Jindo, Korea

2019 ◽  
Vol 12 (1) ◽  
pp. 69-75
Author(s):  
Sun-Ik JANG ◽  
Sunh-Hoon LEE ◽  
Jin LEE ◽  
Kyeong-Ho HAN
Keyword(s):  
Species Composition ◽  
Beam Trawl ◽  
Trawl Fisheries

Seasonal Fluctuation in Abundance and Species Composition of Fish Collected by a Beam Trawl in Coastal Waters off Samcheonpo

2020 ◽  
Vol 32 (3) ◽  
pp. 160-165
Author(s):  
Tae-Sik Yu ◽  
Seong-Hoon Lee ◽  
Sa-Jo Kim ◽  
Jin-Goo Kwon ◽  
Kyeong Ho Han
Keyword(s):  
Species Composition ◽  
Coastal Waters ◽  
Seasonal Fluctuation ◽  
Beam Trawl

scholarly journals Seasonal variations in biomass and species composition of seaweeds along the northern coasts of Persian Gulf (Bushehr Province)

2012 ◽  
Vol 121 (1) ◽  
pp. 241-250 ◽  
Author(s):  
A DADOLAHI-SOHRAB ◽  
M GARAVAND-KARIMI ◽  
H RIAHI ◽  
H PASHAZANOOSI
Keyword(s):  
Species Composition ◽  
Seasonal Variations ◽  
Persian Gulf

scholarly journals Historical discarding in Mediterranean fisheries: a fishers' perception

2015 ◽  
Vol 72 (9) ◽  
pp. 2600-2608 ◽  
Author(s):  
Dimitrios Damalas ◽  
Christos D. Maravelias ◽  
Giacomo C. Osio ◽  
Francesc Maynou ◽  
Mario Sbrana ◽  
...  
Keyword(s):  
Species Composition ◽  
Market Demand ◽  
Sampling Protocol ◽  
The Past ◽  
Regulatory Constraints ◽  
Fishing Strategies ◽  
Commercially Important ◽  
Trawl Fisheries ◽  
Important Fish

Abstract Discarding of commercially important fish species in the bottom trawl fisheries in the northern Mediterranean Sea was investigated by soliciting the long-term recollections of fishers engaged or formerly engaged in such fisheries. The main aim of our investigation was to describe the prevalence of discarding and its evolution over the past 70 years using information gathered through individual questionnaire-based interviews with fishers from ports in Spain, Italy, and Greece, following a standardized sampling protocol. Although it proved impossible to derive absolute estimates of the volume of discarded catches over the period investigated, we conclude that over the past 70 years, discarding as a practice has gradually increased in the northern Mediterranean trawl fisheries and has been accompanied by a shift in the species composition of the discarded catch. While discarding can occur for a number of reasons, our investigations indicate that discarding in the past was mostly driven by market demand, but recent legal and regulatory constraints have led to changes in fishing strategies and became a significant reason for discards.

scholarly journals Distribution and seasonal variations of fisheries resources captured by the beam trawl in Namhae island, Korea

2013 ◽  
Vol 49 (4) ◽  
pp. 419-431 ◽  
Author(s):  
Young Il Seo ◽  
Jong Hee Lee ◽  
Taeg Yun Oh ◽  
Jae Bong Lee ◽  
Young Min Choi ◽  
...  
Keyword(s):  
Seasonal Variations ◽  
Beam Trawl ◽  
Fisheries Resources

scholarly journals Condition and survival of discards in tickler chain beam trawl fisheries

2020 ◽  
Author(s):  
Edward Schram ◽  
◽  
Pieke Molenaar ◽  
Raoul Kleppe ◽  
Adriaan Rijnsdorp ◽  
...  
Keyword(s):  
Beam Trawl ◽  
Trawl Fisheries

scholarly journals Seasonal Changes in Bird Assemblages of a Forest-Steppe Ecotone in North Patagonia

2018 ◽  
Author(s):  
Víctor R. Cueto ◽  
Cristian A. Gorosito
Keyword(s):  
Species Composition ◽  
Seasonal Variations ◽  
Bird Species ◽  
Abundant Species ◽  
Species Level ◽  
Forest Steppe ◽  
Total Abundance ◽  
Long Distance ◽  
North Patagonia ◽  
Different Seasons

AbstractWe evaluate seasonal variations at the community level, analyzing changes in species richness, species composition and total abundance, and at the species level, evaluating differences in breeding and molting seasonality among bird species in a forest-steppe ecotone of north Patagonia. The bird assemblage showed a low seasonal variation in richness and total abundance, but a great change in species composition between spring-summer and fall-winter. The change in species composition promoted few seasonal variations in richness and total abundance, because they were compensated by the presence of abundant species that visit the area in different seasons. At the species level, resident birds and short distance migrants tended to begin breeding earlier than long distance migrants, and birds began to molt body and flight feathers after breeding. Therefore, we found a low overlap of these two demanding activities. Our results highlight the importance of bird movements in response to seasonal variations in the availability of resources, which promote migration or local displacements of birds.Resumen. Cambios estacionales en los ensambles de aves en un ecotono bosque-estepa del norte de PatagoniaEvaluamos las variaciones estacionales a nivel comunitario, analizando la riqueza de especies, la composición de especies y la abundancia total, y a nivel de las especies, evaluando las diferencias en la estacionalidad reproductiva y de muda entre las especies de aves en un ecotono bosque-estepa del norte de Patagonia. El ensamble de aves mostró pocas variaciones estacionales en la riqueza y abundancia total, pero un notable cambio en la composición de especies entre la primavera-verano y el otoño-invierno. El cambio en la composición de especies promovió pocas variaciones estaciones en la riqueza y la abundancia total, porque fueron compensadas por la abundancia de las especies que visitan el área en las diferentes estaciones. A nivel de las especies, las aves residentes y migrantes de corta distancia tendieron a comenzar la reproducción antes que las migrantes de larga distancia, y las aves comenzaron la muda de plumas del cuerpo y del ala al finalizar la reproducción. Por lo cual encontramos una baja superposición de estas dos demandantes actividades. Nuestros resultados remarcan la importancia del movimiento de las aves en respuesta a las variaciones en la disponibilidad de recursos, que promueven la migración o el desplazamiento local de las aves.

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