Record 42 of 47
Preliminary study for determination of the giant squid Dosidicus
gigas gonadic maturity.
AU: Author
Michel, E; Klett, A; Ochoa, RI
SO: Source
Ciencia pesquera. Mexico City. no. 5, pp. 77-89. 1986.
Abstract
With the aim of simplifying the identification of gonadic maturity
stages and also defining the preliminary basis for a detailed study of
the reproductive cycle of the giant squid, Dosidicus gigas , the
different stages of sexual maturity in males and females, at macro and
microscopic levels are described. Four stages are defined for females
and three for males that may be associated with the distinctive
characteristics of the reproductive apparatus. All these may be
applied to realize an empirical scale of maturity, by means of direct
observations of the gonads external morphology.
PY: Publication Year
1986
Record 43 of 47
Management and exploitation of the giant squid (Dosidicus gigas )
AU: Author
Vazquez Novoa, MCH
Abstract
An evaluation was made of capture techniques and fish
handling/processing methods used onboard, regarding the Dosidicus
gigas fishery. An examination was also made of three squid products,
determining their consumer acceptability.
PY: Publication Year
1985
Record 44 of 47
On the fishery and biology of the giant squid Dosidicus gigas in the
Gulf of California, Mexico.
AU: Author
Ehrhardt, NM; Jacquemin, PS; Gracia B., F; Gonzales D., G; Lopez B.,
JM; Ortiz C., J; Solis N., A
Abstract
The population of giant squid (D. gigas ) in the Gulf of California is
clearly a single stock with multiple cohorts. These migrate separately
on occasions but are contemporaneous: their recruitment to the major
fishing grounds occurs around May each year. From May to September the
stock presents the highest densities and thus an optimum situation for
the fishery. The cohorts grow at different rates depending on their
birth date, and probably their natural mortality rates are equally
different even though it has been impossible to measure this parameter
separately for each cohort as yet. Stock assessment analyses indicate
that after explosive fishery development, the stock is approaching the
Maximum Sustainable Yield (MSY). Management schemes are difficult to
define unless the fishery is regulated in terms of the less productive
cohorts.
PY: Publication Year
1983
Record 45 of 47
Dosidicus gigas
AU: Author
Nesis, KN
Abstract
The author provides a description of the life cycle of Dosidicus gigas.
After a brief introduction and using references to the literature,
he describes: 1) egg stage; 2) juvenile stage; 3) growth; 4)
maturation; 5) reproduction; 6) mortality; 7) ecology. A map showing
the geographical distribution of the species is included.
PY: Publication Year
1983
Record 46 of 47
Preliminary study on the reproductive system of the giant squid
Dosidicus gigas (D'Orbigny 1835) Mollusca: Cephalopoda in the Gulf of
California.
AU: Author
Ochoa Baez, RI
SO: Source
TRANS. CIBCASIO. Vol. 6, pp. 187-203. 1982.
Abstract
The giant squid Dosidicus gigas of the Gulf of California is an
important food resource in Mexico. The reproductive system of these
animals, collected during all of 1980, is described. In the females,
an ovary, a set of nidamental glands, and a set of accessory
nidamental glands, were found. Histological studies revealed the
presence of eggs in different stages of development together with
follicular cells. The advanced mature stage coincided with the
presence of vitelline platelets. In the males the testes, the efferent
duct, a spermatophoric sack and organ and a penis were found. The
histological studies showed different stages of the spermatogenesis
and nutritional cells.
PY: Publication Year
1982
Record 47 of 47
Abundance explosion of the Jumbo squid, Dosidicus gigas, on the high
seas of the Peruvian region in relation to anomalous oceanographic
patterns
AU: Author
Bendik, AB
SO: Source
International Council for the Exploration of the Sea, Palaegade 2-4
DK-1261 Copenhagen Denmark. [vp].
Abstract
The research cruise of the RV "Atlantniro" (June-November, 1991) was
aimed to investigate reasons of an unusual high abundance of the Jumbo
squid off the exclusive economic zone of Peru. It was discovered that
this anomalous situation happened because of the large-scale advection
of the warm tropical waters southward. These waters carried large
aggregations of the Jumbo squid into high seas. Simultaneously, a
contrary flux of the cold Peruvian Current was intensified. The
gradient zone between these waters has been used by the Jumbo squid to
forage, as well as by some other predators such as skipjack tuna. This
squid abundance explosion allowed the introduction of a large-scale
fishery targeting D.gigas.
PY: Publication Year
[nd]
Preliminary study for determination of the giant squid Dosidicus
gigas gonadic maturity.
AU: Author
Michel, E; Klett, A; Ochoa, RI
SO: Source
Ciencia pesquera. Mexico City. no. 5, pp. 77-89. 1986.
Abstract
With the aim of simplifying the identification of gonadic maturity
stages and also defining the preliminary basis for a detailed study of
the reproductive cycle of the giant squid, Dosidicus gigas , the
different stages of sexual maturity in males and females, at macro and
microscopic levels are described. Four stages are defined for females
and three for males that may be associated with the distinctive
characteristics of the reproductive apparatus. All these may be
applied to realize an empirical scale of maturity, by means of direct
observations of the gonads external morphology.
PY: Publication Year
1986
Record 43 of 47
Management and exploitation of the giant squid (Dosidicus gigas )
AU: Author
Vazquez Novoa, MCH
Abstract
An evaluation was made of capture techniques and fish
handling/processing methods used onboard, regarding the Dosidicus
gigas fishery. An examination was also made of three squid products,
determining their consumer acceptability.
PY: Publication Year
1985
Record 44 of 47
On the fishery and biology of the giant squid Dosidicus gigas in the
Gulf of California, Mexico.
AU: Author
Ehrhardt, NM; Jacquemin, PS; Gracia B., F; Gonzales D., G; Lopez B.,
JM; Ortiz C., J; Solis N., A
Abstract
The population of giant squid (D. gigas ) in the Gulf of California is
clearly a single stock with multiple cohorts. These migrate separately
on occasions but are contemporaneous: their recruitment to the major
fishing grounds occurs around May each year. From May to September the
stock presents the highest densities and thus an optimum situation for
the fishery. The cohorts grow at different rates depending on their
birth date, and probably their natural mortality rates are equally
different even though it has been impossible to measure this parameter
separately for each cohort as yet. Stock assessment analyses indicate
that after explosive fishery development, the stock is approaching the
Maximum Sustainable Yield (MSY). Management schemes are difficult to
define unless the fishery is regulated in terms of the less productive
cohorts.
PY: Publication Year
1983
Record 45 of 47
Dosidicus gigas
AU: Author
Nesis, KN
Abstract
The author provides a description of the life cycle of Dosidicus gigas.
After a brief introduction and using references to the literature,
he describes: 1) egg stage; 2) juvenile stage; 3) growth; 4)
maturation; 5) reproduction; 6) mortality; 7) ecology. A map showing
the geographical distribution of the species is included.
PY: Publication Year
1983
Record 46 of 47
Preliminary study on the reproductive system of the giant squid
Dosidicus gigas (D'Orbigny 1835) Mollusca: Cephalopoda in the Gulf of
California.
AU: Author
Ochoa Baez, RI
SO: Source
TRANS. CIBCASIO. Vol. 6, pp. 187-203. 1982.
Abstract
The giant squid Dosidicus gigas of the Gulf of California is an
important food resource in Mexico. The reproductive system of these
animals, collected during all of 1980, is described. In the females,
an ovary, a set of nidamental glands, and a set of accessory
nidamental glands, were found. Histological studies revealed the
presence of eggs in different stages of development together with
follicular cells. The advanced mature stage coincided with the
presence of vitelline platelets. In the males the testes, the efferent
duct, a spermatophoric sack and organ and a penis were found. The
histological studies showed different stages of the spermatogenesis
and nutritional cells.
PY: Publication Year
1982
Record 47 of 47
Abundance explosion of the Jumbo squid, Dosidicus gigas, on the high
seas of the Peruvian region in relation to anomalous oceanographic
patterns
AU: Author
Bendik, AB
SO: Source
International Council for the Exploration of the Sea, Palaegade 2-4
DK-1261 Copenhagen Denmark. [vp].
Abstract
The research cruise of the RV "Atlantniro" (June-November, 1991) was
aimed to investigate reasons of an unusual high abundance of the Jumbo
squid off the exclusive economic zone of Peru. It was discovered that
this anomalous situation happened because of the large-scale advection
of the warm tropical waters southward. These waters carried large
aggregations of the Jumbo squid into high seas. Simultaneously, a
contrary flux of the cold Peruvian Current was intensified. The
gradient zone between these waters has been used by the Jumbo squid to
forage, as well as by some other predators such as skipjack tuna. This
squid abundance explosion allowed the introduction of a large-scale
fishery targeting D.gigas.
PY: Publication Year
[nd]