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| Cuadra, T. de la; Chalén, X.; Pérez, P.; Macías, P.; Ortega, D.; Ormaza, F.. |
| Las masas de agua encontradas a partir de las variables de estado, indican una contribución muy pobre de Agua Subtropical Superficial (ASTS), mientras que las mayores contribuciones fueron de Agua Tropical Superficial (ATS). Parámetros como la temperatura y la salinidad determinaron un calentamiento del océano, tanto a nivel superficial como subsuperficial, lo cual sería una consecuencia de los procesos de redistribución de calor del océano.Esta dinámica ocasionaría anomalías del orden de los 30 metros para el caso de la profundidad de la termoclima y 2°C para el caso de la TSM. En el plancton se registraron valores mayores a 5000 larvas de peces/10 m2. La menor cantidad (260 larvas/10 m2) se registró hacia el norte del Golfo, observándose al mismo tiempo... |
| Tipo: Journal Contribution |
Palavras-chave: Oceanographic data; Geochemistry; Salinity data; Plankton; Organic matter; Plankton; Organic matter; Geochemistry; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_5387; Http://aims.fao.org/aos/agrovoc/c_24848. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/3080 |
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| Vicuña, H.; Chalén, X.; Mendieta, E.; Aguilar, F.. |
| A research survey was carried out in the southeast of the San Cristóbal island of the Galápagos Province (Galápagos Islands, Ecuador), between the 6th and 23th of december 1994; a 9 637 km2 was covered, from ca., 100 m depth waters. The Simrad EK-500 (38 kHz) acoustic equipment was used on board the I/V Tohallí of the National Fisheries Institute. The catch was compounded of 98% of makarell (Scomber japonicus) and 2% of south sardine (Sadinops sagax). The estimated results for biological and acoustic parameters for S. sagax were: sex ratio (male and female): 36% y 64%; furcal length range: 21-32 cm; mean legth: 26,6 cm; mean weith: 0,254 kg; theoreticals target strength and weight target strength (TS, TSkg): -38,9 dB and -33,0 dB. Mictofid catches were not... |
| Tipo: Journal Contribution |
Palavras-chave: Pelagic fisheries; Length-weight relationships; Biomass; Biological data; Biomass; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5659. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/3019 |
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| Vicuña, H.; Chalén, X.. |
| The document presents results from the pelagic acoustic research survey, executed at the East zone of the Galápagos Islands, between April and May 1995. A total of ca., 15 500 km² was covered. The following species were identified in the catch: mackarel (Scomber japonicus), south sardine (Sardinops sagax), mictophids (Lampanyctus spp.), and small specimens of giant squid (Dosidicus gigas). Mean legth and weight for mackarel and south sardine were 26,3 cm FL/0,251 kg and 18,6 cm TL/0,051 kg respectively. The estimated density for small pelagic fish of comercial interest (mackarel and sardine) was of 10,5 km². The estimated biomass for mackarel was ca., 125 000 t whereas for sardine was ca., 36 000 t. The current results coincide with those of March-April... |
| Tipo: Journal Contribution |
Palavras-chave: Pelagic fisheries; Length-weight relationships; Biomass; Stock assessment; Echo surveys; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/3022 |
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