Dynamics of maturation, seasonality of reproduction and spawning grounds of the jumbo squid Dosidicus gigas (Cephalopoda: Ommastrephidae) in Peruvian waters

Tafur, Ricardo; Villegas, Piero; Rabí, Miguel; Yamashiro, Carmen

doi:10.1016/s0165-7836(01)00379-4

Cited by 61 publications

(74 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The range of sizes for mature males and females in this study is different from that found in the oceanic waters off Peru (Nesis, 1983) and in Peruvian waters (Tafur et al, 2001).…”

Section: Dietscontrasting

confidence: 94%

“…Thus, the observed skewed sex ratio may result from the selectivity of fishing gear. In Peruvian waters, Tafur et al (2001) reported that females were always more than males during the study period, and the averaged sex ratio (M:F) was 1: 2.85, comparable with that of this study.…”

Section: Dietssupporting

confidence: 90%

“…Therefore, D. gigas were likely to spawn all year around, and the peak spawning time in the study areas was from November 2007 to January 2008. There is a distinct peak in spawning during spring and summer in the southern hemisphere (Nigmatullin et al, 2001;Taipe et al, 2001), and a secondary peak from July to August (Tafur and Rabi, 1997;Tafur et al, 2001).…”

Section: Dietsmentioning

confidence: 99%

“…Spawning takes place throughout the year, but with a distinct peak in spring and summer in the southern hemisphere (October-January; Tafur et al, 2001). D. gigas are monocyclic and have the highest potential fecundity of all the cephalopods, up to 32 million oocytes (Nigmatullin, 1999).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fishery biology of the jumbo flying squid <i>Dosidicus gigas</i> off the Exclusive Economic Zone of Chilean waters

Liu¹,

Chen²,

Lu³

et al. 2010

Sci. Mar.

View full text Add to dashboard Cite

SUMMARY:The jumbo flying squid Dosidicus gigas is widely distributed in the eastern Pacific Ocean and supports an important fishery. Although many studies have been carried out on the biology of this species, limited biological information is available in the waters outside the Exclusive Economic Zone of Chile (EEZ) (20°S-41°S and 74°30ʹW-84°W). Three surveys were conducted in this area by the Chinese squid jigging vessels during the period from April 2006 to May 2008. The majority of the catch in the survey was from the two areas defined by 37°30ʹ-41°S and 78°30ʹ-80°W and by 25°-30°S and 76°-77°30ʹW. The sex ratio (M: F) of the catch was 1: 2.48. The mean mantle length (ML) was 376 mm for males with a range of 257-721 mm and 388.7 mm for females with a range of 236-837 mm. Two distinguished size classes, medium-and large-sized groups, were identified in this study with the medium-sized group (350-450 mm ML) consisting of 89% of the total catch. The sizes at first sexual maturity were 638 mm ML for females and 565 mm ML for males. This study suggests that all the individuals examined were hatched from March 2007 to February 2008, indicating that D. gigas might spawn all year around with a peak spawning time from November 2007 to January 2008. Most of the stomachs analyzed had food remains. The preys included three major groups: fish (mainly lanternfish), cephalopods and crustaceans, but D. gigas was the dominant species in the stomach contents, showing strong evidence of cannibalism. The information obtained from this study improves our understanding of the fishery biology of D. gigas off Chile.Keywords: Dosidicus gigas, fishery biology, Chile. RESUMEN: Biología pesquera de la pota gigante DosiDicus gigas en aguas exteriores a la Zona Económica Exclusiva de Chile. -La pota gigante Dosidicus gigas está ampliamente distribuida en el océano Pacífico oriental y soporta una pesquería importante. Aunque se han realizado muchos estudios sobre la biología de esta especie, la información existente para aguas externas a la Zona Económica Exclusiva (ZEE) de Chile (20ºS-41ºS y 74º30ʹW-84ºW) es muy limitada. Los barcos poteros chinos realizaron tres campañas en esta área entre abril de 2006 y mayo de 2008. La mayoría de las capturas en esas campañas proceden de dos áreas definidas por las coordenadas 37º31ʹS-41ºS 78º30ʹW-80ºW y 25ºS-30ºS 76ºW-77º30ʹW, respectivamente. La relación sexual (M:H) en las capturas fue de 1:2.48. La longitud media del manto (LM) fue de 376 mm para los machos con un rango que varió entre 257 y 721 mm, y de 388.7 mm para las hembras (236-837 mm). Se diferenciaron dos clases de tamaño: un grupo medio, cuya LM varió entre 350 y 450 mm representando un 89% de la captura total, y un grupo grande. La talla de primera maduración sexual fue de 638 mm para las hembras y de 565 mm para los machos. Este trabajo sugiere que todos los individuos examinados habían nacido entre marzo de 2007 y febrero de 2008, lo cual indica que D. gigas puede frezar durante todo el año, habiendo existido un pico de puesta desde n...

show abstract

“…The range of sizes for mature males and females in this study is different from that found in the oceanic waters off Peru (Nesis, 1983) and in Peruvian waters (Tafur et al, 2001).…”

Section: Dietscontrasting

confidence: 94%

Section: Dietssupporting

confidence: 90%

Section: Dietsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fishery biology of the jumbo flying squid <i>Dosidicus gigas</i> off the Exclusive Economic Zone of Chilean waters

Liu¹,

Chen²,

Lu³

et al. 2010

Sci. Mar.

View full text Add to dashboard Cite

show abstract

“…An increase in fishery-favourable waters reflects an overall reduction in SST off Peru and is likely to indicate an increase in the upwelling of cool, nutrient-rich waters. It is probable that variability in upwelling and primary productivity rather than variability in temperature per se is a key factor in influencing the abundance of adult SST in the range of 17 to 22°C does not appear to influence the abundance of squid during the early life history stages, despite significant spawning off the coast of Peru (Tafur et al 2001). In the putative hatching area of the Costa Rica Dome, an increase in hatching-favourable SST (24 to 28°C) was associated with an increase in squid catches in the following year.…”

Section: Discussionmentioning

confidence: 99%

Remotely sensed mesoscale oceanography of the Central Eastern Pacific and recruitment variability in Dosidicus gigas

Waluda¹,

Rodhouse²

2006

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The Jumbo flying squid Dosidicus gigas has a short life span and is subject to rapid changes in population size. This species inhabits the Eastern Pacific, one of the most variable oceanic environments in the world, subject to the El Niño Southern Oscillation (ENSO). This study examined the influence of environmental variability on squid abundance off Peru using mesoscale oceanographic indicators derived from remotely sensed satellite imagery. In the fishery area off Peru, squid abundance was positively associated with sea surface temperatures (SST) between 17 and 22°C during July, corresponding to the peak of the fishery season. In the putative hatching area close to the Costa Rica Dome, squid abundance was positively associated with SST of between 24 and 28°C during September, prior to the start of the fishery season. Squid abundance is apparently strongly influenced by mesoscale variability linked to ENSO, with low levels of upwelling during the very strong El Niño of 1997 to 1998 leading to very low catches of squid off Peru. Variability in upwelling off Peru and in the Costa Rica Dome region may drive primary and secondary production and transport processes affecting the planktonic early life stages and also the availability of food and suitable habitat for adult squid.KEY WORDS: Costa Rica Dome · Dosidicus gigas · El Niño Southern Oscillation · Eastern Pacific · Fishery · Flying squid · Mesoscale oceanography · Upwelling Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 310: [25][26][27][28][29][30][31][32] 2006 lower thermocline, the upwelling of cool, nutrient-rich waters, and high primary productivity (Barber & Chavez 1983, Carr et al. 2002. During warming (El Niño) events, the trade winds weaken and are replaced by westerlies at low latitudes (Longhurst 1998). In addition, the thermocline is depressed and upwelling consists of nutrient-depleted waters, such that productivity is reduced (Barber & Chavez 1983, Huyer et al. 1987. At the equator, 3 currents arise, the westward-flowing North and South Equatorial Currents, and the eastward-flowing Equatorial Counter Current, which bifurcates as it nears the continental margin, giving rise to the Costa Rica Dome. The Dome is an area where the generally strong and shallow thermocline of the eastern tropical Pacific becomes even shallower, with cold nutrient-rich water occurring close to the surface (Wyrtki 1964, Fiedler 2002. This is an area of high productivity, with a regional maximum in chlorophyll concentration in surface waters from May to September, and an associated high abundance of zooplankton (Fiedler 2002).Dosidicus gigas is a eurythermic species, with a usual temperature range of between 15 and 28°C (Nesis 1983), although squid have been found to tolerate extremes of between 4 and 32°C in the deep ocean and equatorial waters respectively (Nigmatullin et al. 2001). The highest concentrations of squid have been recorded at temperatures of between 24 and 29°C in the northern hemisphere (Nesis ...

show abstract

References

2005

Cephalopods

View full text Add to dashboard Cite

Dynamics of maturation, seasonality of reproduction and spawning grounds of the jumbo squid Dosidicus gigas (Cephalopoda: Ommastrephidae) in Peruvian waters

Cited by 61 publications

References 3 publications

Fishery biology of the jumbo flying squid <i>Dosidicus gigas</i> off the Exclusive Economic Zone of Chilean waters

Fishery biology of the jumbo flying squid <i>Dosidicus gigas</i> off the Exclusive Economic Zone of Chilean waters

Remotely sensed mesoscale oceanography of the Central Eastern Pacific and recruitment variability in Dosidicus gigas

References

Contact Info

Product

Resources

About