Natural egg mass deposition by the Humboldt squid (Dosidicus gigas) in the Gulf of California and characteristics of hatchlings and paralarvae

  title={Natural egg mass deposition by the Humboldt squid (Dosidicus gigas) in the Gulf of California and characteristics of hatchlings and paralarvae},
  author={Danna J. Staaf and Susana Camarillo‐Coop and Steven H. D. Haddock and Albert C. Nyack and John B. Payne and C{\'e}sar Augusto Salinas-Zavala and Brad A. Seibel and Lloyd A. Trueblood and Chad L. Widmer and William F. Gilly},
  journal={Journal of the Marine Biological Association of the United Kingdom},
  pages={759 - 770}
The jumbo or Humboldt squid, Dosidicus gigas, is an important fisheries resource and a significant participant in regional ecologies as both predator and prey. It is the largest species in the oceanic squid family Ommastrephidae and has the largest known potential fecundity of any cephalopod, yet little is understood about its reproductive biology. We report the first discovery of a naturally deposited egg mass of Dosidicus gigas, as well as the first spawning of eggs in captivity. The egg mass… 
Observations of multiple pelagic egg masses from small-sized jumbo squid (Dosidicus gigas) in the Gulf of California
Observations of six egg masses laid in the Gulf of California in May 2015 report the first documented case of biota associated with wild ommastrephid egg masses, and developmental heterochronies in chromatophore development between D. gigas and other ommoldt squid are discussed.
Planktonic Egg Masses of the Diamondback Squid Thysanoteuthis rhombus in the Western Caribbean, Honduras; a Comprehensive Review of Global Observations
Abstract The Diamondback Squid Thysanoteuthis rhombus is a globally distributed deep-sea species, one of only a few oegopsid nektonic cephalopods in which planktonic egg masses are well known. Here,
Estimation of spawning habitats of market squid (Doryteuthis opalescens) from field surveys of eggs off Central and Southern California
During 2001–2002, squid egg beds in Monterey Bay, Carmel Bay, and around the California Channel Islands were surveyed using a remotely operated vehicle with the goal of delineating the habitat of egg beds that are spawned during active commercial fishing.
Egg Masses of Flying Squids (Cephalopoda: Ommastrephidae)
  • D. Vijai
  • Environmental Science, Biology
    Journal of Shellfish Research
  • 2016
Increased efforts are required to develop observation and sampling techniques in the wild to obtain more direct evidence about reproduction in squids, as fragmentary knowledge is about this important reproductive stage.
Reproductive biology of jumbo squid Dosidicus gigas in relation to environmental variability of the northern Humboldt Current System
Three general features related to reproduction enabling the squid to adjust to changes have been identified: (1) variable size-at-maturity, (2) temporal decoupling of male and female formation of reproductive tissue in order to temporally distribute the required energy and (3) changing sex-ratios.
Spawning pattern of the neon flying squid Ommastrephes bartramii (Cephalopoda: Oegopsida) around the Hawaiian Islands
The data indicate that the first spawning event occurs at a mantle length of ~520-540 mm for Hawaiian O. bartramii, which is considered an intermittent spawner because the eggs mature asynchronously, with multiple filling and evacuation events.
Presence of Dosidicus gigas paralarvae (Cephalopoda: Ommastrephidae) in the central Gulf of California, Mexico related to oceanographic conditions
The jumbo squid Dosidicus gigas is the only ommastrephid commercially caught in Mexico and the number of paralarvae found in this study contrast with the potential fecundity of mature females which are found throughout the year.
Evidence of Iteroparity in Jumbo Squid Dosidicus gigas in the Gulf of California, Mexico
Evidence of postovulatory follicles in resting females of D. gigas indicates that the reproductive strategy of jumbo squid is iteroparity, indicating that this species can spawn more than once during its life span.
Observations on the spawning behavior, egg masses and paralarval development of the ommastrephid squid Todarodes pacificus in a laboratory mesocosm
Mesocosm observations on the reproduction of the squid Todarodes pacificus reveal the animal's spawning behavior, egg mass properties and paralarval development in a simulated natural environment.


Spawning by jumbo squid Dosidicus gigas in San Pedro Mártir Basin, Gulf of California, Mexico
Molecular genetic methods indicate that mating, spawning and early development of D. gigas occur in this area of the central Gulf of California.
Food and feeding habits of jumbo squid Dosidicus gigas (Cephalopoda: Ommastrephidae) from the Gulf of California, Mexico
Jumbo squid in the slopes of the Guaymas basin feed on abundant schooling mesopelagic micronekton of annual nature with a quick response to environmental changes, which could partly explain the large annual fluctuations of this commercial resource.
Embryos and Rhynchoteuthion Paralarvae of the Jumbo Flying Squid Dosidicus gigas (Cephalopoda) Obtained through Artificial Fertilization from Peruvian Waters
Shipboard artificial fertilization experiments were carried out during November 1997 using four mature and mated females of Dosidicus gigas using oviducal gland powder from the closely related species, Ommastrephes bartramii, which is essential for normal embryonic development.
First records of egg masses of Nototodarus gouldi McCoy, 1888 (Mollusca: Cephalopoda: Ommastrephidae), with comments on egg‐mass susceptibility to damage by fisheries trawl
Abstract The egg mass and embryos of the ommastrephid squid Nototodarus gouldi McCoy, 1888 are reported for the first time, their identity confirmed by mitochondrial 16S rDNA sequence determination.
The squid Loligo opalescens was raised in the laboratory to a maximum age of 100 days on a diet of Artemia nauplii and adults, and growth rate was highly variable in different individuals, ranging from 0.5 to nearly 4.5 mm mantle length per month.
Egg size, fecundity, and spawning in females of the genus Illex (Cephalopoda: Ommastrephidae)
The squids genus Illex is one of typical r-strategists among the cephalopods and ripe egg production decreases over time with only a 50% replacement of the initial stock of vitelline oocytes and a decreasing volume of eggs at each release.
Life history of Gonatus onyx (Cephalopoda: Teuthoidea): deep-sea spawning and post-spawning egg care
The high lipid content of the digestive gland in adult females of this species may provide fuel to support such an extended “brooding” period of the midwater squid Gonatus onyx Young.
Ontogeny of copepod predation in juvenile squid (Loligo opalescens).
It is found that mastery of copepod capture develops progressively, starting shortly after hatch with strong attacks of a simple type, and culminates, by approximately 40 days post-hatching, in adult-like prey capture behavior involving tentacle extension and retraction.
Age, growth and reproductive biology of diamond-shaped squid Thysanoteuthis rhombus (Oegopsida : Thysanoteuthidae)
It is suggested that T rhombus is an intermittent spawner with multiple filling and evacuation of oviducts, i.e. living in pairs consisting of a male and female, is reproduction and is optimal given the low density of T Rhombus populations and low active movement of squids.
Evidence for multiple spawning in the tropical oceanic squid Stenoteuthis oualaniensis (Teuthoidea: Ommastrephidae)
Size-frequency analyses of ovarian oocytes revealed continuous egg production throughout adult life, indicating repeat spawning in Stenoteuthis oualaniensis.