p. 87-89

Boletín IMARPE vol. 7, nº 6, 1983; p.197-235

Eastern Boundary Current systems (EBCSs) are among the most productive fishing areas in the world. High primary and secondary productivity supports a large biomass of small planktivorous pelagic fish, “small pelagics”, which are important drivers of production to the entire system whereby they can influence both higher and lower trophic levels. Environmental variability causes changes in plankton (food) quality and quantity, which can affect population sizes, distribution and domi-nance among small pelagics. This variability combined with impacts from the fishery complicate the development of management strategies. Consequently, much recent work has been in the development of multispecies trophic models to better understand interdependencies and system dynamics. Despite similarities in extent, structure and primary productivity between EBCSs, the Peruvian system greatly differs from ...

Eastern Boundary Current systems (EBCSs) are among the most productive fishing areas in the world. High primary and secondary productivity supports a large biomass of small planktivorous pelagic fish, “small pelagics”, which are important drivers of production to the entire system whereby they can influence both higher and lower trophic levels. Environmental variability causes changes in plankton (food) quality and quantity, which can affect population sizes, distribution and domi-nance among small pelagics. This variability combined with impacts from the fishery complicate the development of management strategies. Consequently, much recent work has been in the development of multispecies trophic models to better understand interdependencies and system dynamics. Despite similarities in extent, structure and primary productivity between EBCSs, the Peruvian system greatly differs from ...

La Bahía Independencia puede ser considerada a nivel mundial como una de las zonas mas productivas en invertebrados bentónicos, cuyas capturas están sujetas a fluctuaciones fuertes originadas por la ocurrencia del fenómeno El Niño y La Niña y por la falta de medidas de manejo adecuadas. Durante períodos con calentamientos fuertes los desembarques anuales alcanzan las 50000 t en un área de aproximadamente 150 km² y durante años fríos estas se mantienen alrededor de 500 a 1000 t.El presente estudio analiza los cambios de los desembarques en la Bahía Independencia observados durante las dos últimas décadas y discute los principales factores que afectan los “booms” de concha de abanico. En este sentido se usa información sobre capturas, temperatura y aquella relacionada con el crecimiento, reproducción, prelación, densidad media y condiciones de oxígeno procede...