Results 61 to 70 of about 32,936 (266)

The intestine as a diagnostic character in identifying certain clupeoids (Engraulididae, Clupeidae, Dussumieriidae) and as a morphometric character for comparing anchoveta (Centengraulis mysticetus) populations [PDF]

open access: yes, 1958
ENGLISH: The several species of clupeoid fishes used as baitfish in the Eastern Pacific tuna fishery are, in some cases, sufficiently similar to make identification difficult.
Horder, Wilhelm
core  

Attenuation of Coda Waves in the Central Region of the Gulf of California, México

open access: yesGeofísica Internacional, 2017
Se analizan las ondas de coda de eventos registrados por la red sísmica de NARS que cuenta con instrumentos instalados a lo largo de ambas márgenes del Golfo de California, México, para estimar atenuación Qc.
Héctor E. Rodríguez-Lozoya   +6 more
doaj   +1 more source

Some factors affecting the distribution and apparent abundance of yellowfin and skipjack tuna in the Eastern Pacific Ocean [PDF]

open access: yes, 1964
ENGLISH: Since 1951, the Inter-American Tropical Tuna Commission has been investigating the biology, ecology and population dynamics of the yellowfin tuna, Thunnus albacares, and the skipjack tuna, Katsuwonus pelamis, in the Eastern Pacific Ocean.
Barrett, Izadore, Broadhead, Gordon C.
core  

Equidad distributiva del ingreso pesquero en la reserva de la biosfera Alto golfo de California y delta del Río Colorado en México

open access: yesFrontera Norte, 2012
Se analiza la distribución del ingreso y se estima el grado de equidad durante 1994 y 2002 en tres comunidades colindantes a la reserva de la biosfera alto golfo de California y delta del río Colorado (RBAGC): Puerto Peñasco, el Golfo de Santa Clara, en ...
Carlos Israel VÁZQUEZ LEÓN   +3 more
doaj  

Frictional damping of the tide in the Gulf of California

open access: yesGeofísica Internacional, 1985
Se presenta una estimación del efecto de la fricción del fondo sobre la marea en el Golfo de California, suponiendo que su cuenca es un canal con profundidad y anchura variables. Se de.muestra que el efecto es pequeño. Esto permite incluir la interacción
G. Godin
doaj   +1 more source

Chemical Profiling Provides Insights into the Metabolic Machinery of Hydrocarbon-Degrading Deep-Sea Microbes

open access: yesmSystems, 2020
Marine microbes are known to degrade hydrocarbons; however, microbes inhabiting deep-sea sediments remain largely unexplored. Previous studies into the classical pathways of marine microbial metabolism reveal diverse chemistries; however, metabolic ...
Aldo Moreno-Ulloa   +9 more
doaj   +1 more source

Gillraker analysis and speciation in the thread herring genus Opisthonema [PDF]

open access: yes, 1963
ENGLISH: The thread herrings, genus Opisthonema, family Clupeidae, are marine fishes that occur only in tropical and subtropical waters off both coasts of the American continent.
Barrett, Izadore, Berry, Frederick H.
core  

Late Holocene Evolution of the Lagoonal Harbour of the Punic Centre of Othoca (Western Sardinia, Mediterranean Sea)

open access: yesGeoarchaeology, Volume 40, Issue 2, March/April 2025.
ABSTRACT Geophysical surveys and multiproxy analyses of sediment cores have been used to reconstruct the palaeoenvironmental evolution of the Santa Giusta coastal lagoon (SGL), along the western coast of Sardinia. This area served as a natural harbour mainly during the Punic and Roman Republican periods (6th–2nd century bc).
Giovanni De Falco   +8 more
wiley   +1 more source

LISTA ANOTADA DE LAS ESPECIES ÍCTICAS ANFIPACÍFICAS, DE AFINIDADBOREAL, ENDÉMICAS Y ANFIPENINSULARES DEL GOLFO DECALIFORNIA, MÉXICO

open access: yesEcosistemas y Recursos Agropecuarios, 2014
Esta contribución presenta una lista sistemáticaanotada y verificada de la ictiofauna de afinidad anfipacífica, boreal, endémica y anfipeninsular del Golfo de California. El elenco ictiofaunístico está compuesto por 137 especies, agrupadas en dos clases,
JL Castro-Aguirre   +2 more
doaj   +1 more source

El estado actual de los tiburones y rayas sujectos a explotación comercial en el Golfo de California: una investigación aplicada al mejoramiento de su manejo pesquero y conservación [PDF]

open access: yes, 2009
Se realizaron prospecciones estacionales durante 1998–1999 en Baja California, Baja California Sur, Sonora y Sinaloa para determinar la dimensión y las actividades de las pesquerías artesanales de elasmobranquios dentro del Golfo de California.
Bizzarro, Joseph J.   +7 more
core  

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