Fishery biology of jumbo flying squid Dosidicus gigas off Costa Rica Dome

2014 ◽  
Vol 13 (3) ◽  
pp. 485-490 ◽  
Author(s):  
Xinjun Chen ◽  
Jianghua Li ◽  
Bilin Liu ◽  
Gang Li ◽  
Huajie Lu
Keyword(s):  
Costa Rica ◽  
Dosidicus Gigas ◽  
Fishery Biology ◽  
Costa Rica Dome ◽  
Jumbo Flying Squid

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.

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

Subseasonal SST Variability in the Tropical Eastern North Pacific during Boreal Summer

2008 ◽  
Vol 21 (17) ◽  
pp. 4149-4167 ◽  
Author(s):  
Eric D. Maloney ◽  
Dudley B. Chelton ◽  
Steven K. Esbensen
Keyword(s):  
Costa Rica ◽  
Warm Pool ◽  
Boreal Summer ◽  
Sst Variability ◽  
East Pacific ◽  
Pacific Warm Pool ◽  
Northern Edge ◽  
Precipitation Anomalies ◽  
Sst Anomalies ◽  
Costa Rica Dome

Abstract Boreal summer intraseasonal (30–90-day time scale) sea surface temperature (SST) variability in the east Pacific warm pool is examined using Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) sea surface temperatures during 1998–2005. Intraseasonal SST variance maximizes at two locations in the warm pool: in the vicinity of 9°N, 92°W near the Costa Rica Dome and near the northern edge of the warm pool in the vicinity of 19°N, 108°W. Both locations exhibit a significant spectral peak at 50–60-day periods, time scales characteristic of the Madden–Julian oscillation (MJO). Complex empirical orthogonal function (CEOF) and spectra coherence analyses are used to show that boreal summer intraseasonal SST anomalies are coherent with precipitation anomalies across the east Pacific warm pool. Spatial variations of phase are modest across the warm pool, although evidence exists for the northward progression of intraseasonal SST and precipitation anomalies. Intraseasonal SSTs at the north edge of the warm pool lag those in the vicinity of the Costa Rica Dome by about 1 week. The MJO explains 30%–40% of the variance of intraseasonal SST anomalies in the east Pacific warm pool during boreal summer. Peak-to-peak SST variations of 0.8°–1.0°C occur during MJO events. SST is approximately in quadrature with MJO precipitation, with suppressed (enhanced) MJO precipitation anomalies leading positive (negative) SST anomalies by 7–10 days. Consistent with the CEOF and coherence analyses, MJO-related SST and precipitation anomalies near the Costa Rica Dome lead those at the northern edge of the warm pool by about 1 week.

Wind Generation of the Costa Rica Dome

Science ◽  
1981 ◽  
Vol 214 (4520) ◽  
pp. 552-554 ◽  
Author(s):  
E. E. HOFMANN ◽  
A. J. BUSALACCHI ◽  
J. J. Q'BRIEN
Keyword(s):  
Costa Rica ◽  
Wind Generation ◽  
Costa Rica Dome
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