INVESTIGADORES
BARON pedro Jose
artículos
Título:
Embryonic development of Loligo gahi and modeling of hatching frequency distributions in Patagonia
Autor/es:
BARÓN, PEDRO J.
Revista:
BULLETIN OF MARINE SCIENCE
Editorial:
University of Miami, Rosentiel School of Marine Sciences
Referencias:
Lugar: Miami; Año: 2002 vol. 71 p. 165 - 173
ISSN:
0007-4977
Resumen:
The embryonic phase of a cephalopod species may represent an important part of its
life cycle, especially when it inhabits low temperature waters. Loligo gahi is the second
most important loliginid squid in captures worldwide and is abundant in cold waters of
the Patagonian shelf. No information has been published on this species embryogenesis.
A scale of embryonic development was established for the species; the embryos were
incubated at six different temperature regimes and the lengths of development from different
stages of embryonic development to hatching were recorded. The embryonic development
of L. gahi was normal within the range of 5°20°C, and stopped at temperature
regimes of 4°C and 23°C. The daily accumulated temperature (DAT) required for
development from fertilization to hatching was estimated to be 617789°C d. Annual
seasons of low (fall to winter) and high (spring to summer) hatching frequency were
observed in numerical projections of hatching frequency distribution for coastal locations
of the Patagonian coast.Loligo gahi is the second
most important loliginid squid in captures worldwide and is abundant in cold waters of
the Patagonian shelf. No information has been published on this species embryogenesis.
A scale of embryonic development was established for the species; the embryos were
incubated at six different temperature regimes and the lengths of development from different
stages of embryonic development to hatching were recorded. The embryonic development
of L. gahi was normal within the range of 5°20°C, and stopped at temperature
regimes of 4°C and 23°C. The daily accumulated temperature (DAT) required for
development from fertilization to hatching was estimated to be 617789°C d. Annual
seasons of low (fall to winter) and high (spring to summer) hatching frequency were
observed in numerical projections of hatching frequency distribution for coastal locations
of the Patagonian coast.L. gahi was normal within the range of 5°20°C, and stopped at temperature
regimes of 4°C and 23°C. The daily accumulated temperature (DAT) required for
development from fertilization to hatching was estimated to be 617789°C d. Annual
seasons of low (fall to winter) and high (spring to summer) hatching frequency were
observed in numerical projections of hatching frequency distribution for coastal locations
of the Patagonian coast.°C and 23°C. The daily accumulated temperature (DAT) required for
development from fertilization to hatching was estimated to be 617789°C d. Annual
seasons of low (fall to winter) and high (spring to summer) hatching frequency were
observed in numerical projections of hatching frequency distribution for coastal locations
of the Patagonian coast.°C d. Annual
seasons of low (fall to winter) and high (spring to summer) hatching frequency were
observed in numerical projections of hatching frequency distribution for coastal locations
of the Patagonian coast.