Age, growth and population structure of jumbo flying squid Dosidicus gigas off the Peruvian Exclusive Economic Zone based on beak microstructure

2016 ◽  
Vol 82 (4) ◽  
pp. 597-604 ◽  
Author(s):  
Guanyu Hu ◽  
Zhou Fang ◽  
Bilin Liu ◽  
Dan Yang ◽  
Xinjun Chen ◽  
...  
Keyword(s):  
Population Structure ◽  
Exclusive Economic Zone ◽  
Dosidicus Gigas ◽  
Economic Zone ◽  
Jumbo Flying Squid

scholarly journals Age, growth and population structure of jumbo flying squid, Dosidicus gigas, based on statolith microstructure off the Exclusive Economic Zone of Chilean waters

2010 ◽  
Vol 91 (1) ◽  
pp. 229-235 ◽  
Author(s):  
Xinjun Chen ◽  
Huajie Lu ◽  
Bilin Liu ◽  
Yong Chen
Keyword(s):  
Population Structure ◽  
Growth Rates ◽  
The Body ◽  
Exclusive Economic Zone ◽  
Spatial And Temporal Variability ◽  
Dosidicus Gigas ◽  
Austral Spring ◽  
Economic Zone ◽  
Austral Autumn ◽  
Jumbo Flying Squid

The jumbo flying squid, Dosidicus gigas, support an important squid fishery off the Exclusive Economic Zone of Chilean waters. However, we only have limited information about their biology. In this study, age, growth and population structure of D. gigas were studied using statoliths from 533 specimens (386 females and 147 males) randomly sampled in the Chinese squid jigging surveys from 2007 to 2008 off the Exclusive Economic Zone of Chile. Mantle lengths (MLs) of the sample ranged from 206 to 702 mm, and their ages were estimated from 150 to 307 days for females and from 127 to 302 days for males. At least two spawning groups were identified, the main spawning peak tended to occur between August and November (austral spring group), and the secondary peak appeared during March to June (austral autumn group). The ML–age relationship was best modelled by a linear function for the austral spring group and a power function for the austral autumn group, and the body weight (BW)–age relationship was best described by an exponential function for both the groups. Instantaneous relative growth rates and absolute growth rates for ML and BW did not differ significantly between the two groups. The growth rate of D. gigas tended to be high at young stages, and then decreased after the sub-adult stage (>180 days old). This study suggests large spatial and temporal variability in key life history parameters of D. gigas, calling for the collection of more data with fine spatial and temporal scales to further improve our understanding of the fishery biology of D. gigas.

scholarly journals Fishery biology of the jumbo flying squid Dosidicus gigas off the Exclusive Economic Zone of Chilean waters

2010 ◽  
Vol 74 (4) ◽  
pp. 687-695 ◽  
Author(s):  
Bilin Liu ◽  
Xinjun Chen ◽  
Huajie Lu ◽  
Yong Chen ◽  
Weiguo Qian
Keyword(s):  
Exclusive Economic Zone ◽  
Dosidicus Gigas ◽  
Fishery Biology ◽  
Economic Zone ◽  
Jumbo Flying Squid

Fine-scale population structure of Lobatus gigas in Jamaica’s exclusive economic zone considering hydrodynamic influences

2018 ◽  
Vol 199 ◽  
pp. 53-62 ◽  
Author(s):  
Kimani A. Kitson-Walters ◽  
Adam S. Candy ◽  
Nathan K. Truelove ◽  
Marcia E. Roye ◽  
Mona K. Webber ◽  
...  
Keyword(s):  
Population Structure ◽  
Exclusive Economic Zone ◽  
Fine Scale ◽  
Scale Population ◽  
Economic Zone

Age, growth and population structure of jumbo flying squid, Dosidicus gigas, off the Costa Rica Dome

2012 ◽  
Vol 93 (2) ◽  
pp. 567-573 ◽  
Author(s):  
Xinjun Chen ◽  
Jianhua Li ◽  
Bilin Liu ◽  
Yong Chen ◽  
Gang Li ◽  
...  
Keyword(s):  
Population Structure ◽  
Costa Rica ◽  
Instantaneous Growth Rate ◽  
Spawning Ground ◽  
Dosidicus Gigas ◽  
Specific Population ◽  
Daily Growth ◽  
Growth Zones ◽  
Costa Rica Dome ◽  
Jumbo Flying Squid

Based on the samples collected in Chinese scientific surveys off the Costa Rica Dome from July to August in 2009, statolith microstructure of the jumbo flying squid, Dosidicus gigas, was analysed for studying their age, growth and population structure. Three typical growth zones (postnuclear, dark and peripheral zones), abnormal increments (checks) and aberrant microstructure (additional centre and additional rings) were found in the statoliths examined. Squid sizes ranged from 205 to 429 mm dorsal mantle length (ML) with ages no more than 10 months for females and 8 months for males. Back-calculated hatching dates were from November 2008 to April 2009. Growth in ML was best described by a linear function for both the sexes, while growth in body weight was best quantified by an exponential function for females and a power curve for males. The maximum absolute daily growth rates and instantaneous growth rate in ML were reached during 181–210 and 151–180 days for females and males, respectively. The Costa Rica Dome and its adjacent waters were considered as a potential spawning ground because of presence of not only high proportion of mature squid but also rhynchoteuthion paralarvae, and high primary productivity from the strong upwelling. This study suggests that D. gigas have complicated intra-specific population structure and large spatial variability in the key life history parameters.

Age, growth and population structure of the jumbo flying squid Dosidicus gigas in Peruvian waters

2001 ◽  
Vol 54 (1) ◽  
pp. 51-61 ◽  
Author(s):  
J. Argüelles ◽  
P.G. Rodhouse ◽  
P. Villegas ◽  
G. Castillo
Keyword(s):  
Population Structure ◽  
Dosidicus Gigas ◽  
Jumbo Flying Squid

ZONA EKONOMI EKSLUSIF (ZEE) DALAM POROS MARITIM DAN TOL LAUT

2018 ◽  
Author(s):  
Joko Dwi Sugihartono
Keyword(s):  
Deep Sea ◽  
Exclusive Economic Zone ◽  
National Unity ◽  
Logistics Cost ◽  
The Earth ◽  
Sea Bed ◽  
Sea Transportation ◽  
Economic Zone ◽  
The Law ◽  
Lack Of Knowledge

<p>in Indonesia is a region bordering the sea region of Indonesia determined by the law which included sea bed, land under it and water above it with the limit of 200miles. This is measured from Indonesian line of the sea.This whole time a lot of people see the shoreline as the sea border. This perspective makes us alienated and lack of knowledge to take advantage of the sea. This understanding also conjures the idea sea toll, to confirm that Indonesia is maritime country. Sea toll means building sea transportation with ships or sea logistic system which will serve nonstop back and forth from Sabang to Merauke. One of the factors to support this is by building ports (deep sea port) order to give faraway to big ships. A course that spreading as far as 5,000 kilometers or an eighth circumference of the earth One of the purposes of sea toll is to move the economy as efficient and evenly as possible. With the hope that, there will be ships back and forth on Indonesian water, so logistics cost will be cheap. That is why; sea toll is one of President Joko Widodo’s priorities which are also meant to develop Indonesia as maritime country and develop Indonesia as national unity. In addition sea toll can also be affirmation, that Indonesia is in every regions even if it is through ships.</p><p><strong>Keywords : Exclusive Economic Zone (ZEE) , Sea Toll , The Shaft Maritime, A Seaport</strong></p>

Geochemistry of REY-rich mud in the Japanese Exclusive Economic Zone around Minamitorishima Island

2016 ◽  
Vol 50 (6) ◽  
pp. 575-590 ◽  
Author(s):  
Koichiro Fujinaga ◽  
Kazutaka Yasukawa ◽  
Kentaro Nakamura ◽  
Shiki Machida ◽  
Yutaro Takaya ◽  
...  
Keyword(s):  
Exclusive Economic Zone ◽  
Economic Zone
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