[Characteristics of fish aggregation devices (FADs)and associated tuna schools behavior in Chinese tuna purse seine fishery.].

The use of fish aggregation devices (FADs) can increase catchability of tuna purse seine for associated tuna schools. In the past decades, large scale deployments of FADs have drawn the international attention due to their negative effects on the marine environment. Finding a FAD design ecologically and economically compatible has therefore become a challenge for tuna purse seine fishe-ry.

[Behavioral and physiological ecology of Antarctic krill (Euphausia superba): A review].

Behavioral and physiological ecology are two important research aspects of ecological field. Related studies help us better understand the marine animal's habit and adaptability to environment. Antarctic krill (Euphausia superba, thereafter krill) is a key-stone species in the Southern Ocean.

[Spatial-temporal and environmental effects of catch rate on Antarctic krill fishery in the South Georgia Island in the austral winter season based on the fine scale data].

The waters around the South Georgia Island is one of the main fishing ground of Antarctic krill fishery and many predators such as sea seal and whale inhabited this island target Antarctic krill as a food source. So it is very important for further understanding Antarctic ecosystem to conduct the research on abundance fluctuation of Antarctic krill resource around this island. Consequently, based on the fine scale fishery data collected in the winter 2013, using the generalized additive model (GAM), the present study analyzed the relationship between environmental factors and the catch rate of Antarctic krill.

[Reasons of drifting floating objects aggregating rainbow runner (Elagatis bipinnulata)].

Many pelagic species tend to aggregate under drifting floating objects. This has led to the development of drifting fish aggregation devices (FADs) to attract the tropical tunas for the tuna purse seine fishery. However, FADs can also attract other non-targeting small pelagic species such as rainbow runner Elagatis bipinnulata, although it is still unclear why those species can be attracted and aggregated under an FAD.

[Age identification and growth characteristics of Katsuwonus pelamis in western and central Pacific Ocean].

Fish age and growth are the important biological parameters for the assessment of fishery resources. With the help of purse seiners, 262 individuals of skipjack tuna (Katsuwonus pelamis) were sampled from western and central Pacific Ocean in October 2007 - January 2008. The measurements in situ showed that the fork length of the samples ranged from 278 to 746 mm, and their body mass ranged from 345 to 9905 g.