Results 91 to 100 of about 8,233 (142)

Growth and age composition of northern bluefin tuna, Thunnus thynnus, caught in the Eastern Pacific Ocean, as estimated from length-frequency data, with comments on trans-Pacific migrations [PDF]

open access: yes, 1993
ENGLISH: The spawning of Pacific northern bluefin tuna, Thunnus thynnus, takes place only in the western Pacific Ocean (WPO), but substantial numbers of the juveniles migrate to the eastern Pacific Ocean (EPO), where they remain for several months, or ...
Bayliff, William H.
core  

Cardiac Performance of Free-Swimming Wild Sockeye Salmon during the Reproductive Period. [PDF]

open access: yesIntegr Org Biol, 2020
Prystay TS   +7 more
europepmc   +1 more source

Report of the Inter-American Tropical Tuna Commission for the year 1952 [PDF]

open access: yes, 1953
ENGLISH: The Inter-American Tropical Tuna Commission, established by a Convention between the United States and Costa Rica, has as its purpose the collection and interpretation of information which will facilitate maintaining, at levels of maximum ...

core  

Inducción al desove de la almeja estuarina amenazada, Polymesoda arctata (DESHAYES, 1854)

open access: yes, 2021
In order to promote knowledge in conservation and sustainable use of globally threatened mollusks, juveniles are being obtained in the laboratory for restocking and aquaculture production. P. arctata has a high potential for aquaculture because they feed on primary productivity, have early maturity, external fertilization, hermaphroditism and the ...
openaire   +1 more source

Temperature and light intensity affecting egg production and growth performance of the Apple Snail Pomacea patula [Baker, 1922]

open access: yesAIA Avances en Investigación Agropecuaria, 2006
Se efectuaron experimentos de desove del caracol dulceacuícola [Pomacea patula Baker, 1922] en tanques exteriores durante un año. Las observaciones incluyeron el desove de 30 hembras, total de huevos depositados y la eclosión de pequeños caracoles ...
A. O. Meyer-Willerer, A. Santos-Soto
doaj  

Biologia reproductiva y estimaciones de poblaciones de la trucha arco iris, salmo gairdneri, en dos ríos montañosos de Costa Rica

open access: yesUniciencia, 1984
Se marcó y se recapturó la trucha Arco Iris, Salmo Gairdneri, durante marzo y abril de 1983, en los ríos Ciruelas y Sarapiquí, provincia de Heredia, Costa Rica.
Debbie Irwin
doaj  

Efecto de la ablación unilateral del pedúnculo ocular sobre el tiempo de maduración de los ovocitos y fecundidad de Penaeus vannamei [PDF]

open access: yes, 2013
Los estudios de los procesos de maduración tendientes a optimizar el cultivo de P. vannamei, son necesarios para poder planificar adecuadamente la producción y satisfacer la demanda de poslarvas de mejor calidad a escala comercial que exige hoy en día
Saldarriaga Y., David E.   +1 more
core  

Cytogenetic study in the sea urchin "Paracentrotus lividus" (Lamarck, 1816) [PDF]

open access: yes, 2015
[Resumen] El erizo de mar común Paracentrotus lividus (Lamarck, 1816) es la especie diana de la pesquería de erizo en Europa. A pesar de que esta especie alcanza su máxima abundancia en las costas gallegas, la sobreexplotación de los bancos está ...
González-Castellano, Inés
core  

Patrones de distribución y fluctuaciones de desoves de anchoveta y sardina

open access: yes, 2012
Expone los resultados relativos a los estudios sobre las primeras etapas de vid de la anchoveta principalmente.
openaire   +2 more sources

Population structure of Pacific yellowfin tuna [PDF]

open access: yes, 1978
ENGLISH: The population structure and production of Pacific yellowfin tuna, Thunnus albacares, were examined by studying most of the basic data available on stock assessment, as well as other data, for the period 1965 to 1972.
Honma, M.   +2 more
core  

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