Octopus mimus Gould, 1852 is an important benthic resource in the Peruvian artisanal fishery and is always in demand on the international market. Bibliographic antecedents about the culture of this species for Southeastern Pacific are few. The present study was made in the Center of Aquaculture "La Arena", Casma, Peru. The experiments were carried out in fiber glass tanks and long-line in the sea. Feeding was made with fish, crustaceans and mollusk and also was tested with wet pellets ("piensos humedos"), the last one being accepted after an starvation period. For copulation the biggest specimens were chosen (1,5 kg). Differences were observed in growth for those reared in the pools (185 and 369 g/month), the growth rate was greater than that of those in the lines of culture (120,6 g/month). The maximum paralarvae survival was 17 days to temperatures of 21 to 22 oC; they were fed with na...

This paper describes the methodology used for the culture of Pacific oyster Crassostrea gigas in an artisanal breeding pond in the La Arena acuicola center, in Casma. Reproducers at gonadal maturity phase from the culture lines of the center were used. They were prepared in fiber glass tanksi of 1000 L capacity with unfiltered sea water at 27 ± 0,9 oC, and fed with maize fecula and microalgae collected from site. In one group spawning was induced by thermal stimulation (30 to 31 oC), in the other one hydrogen peroxide was added, obtaining different responses. 20 minutes after fertilization the polar body was defined in 100% of fertilized eggs; veliger larvae were visible 24 hours after fertilization. Larvae reached the pediveliger stage 20 days after culture, with average sizes of 237 ± 10 µm. Ground shells (300pm), sandpapered black plastic and oyster valvas were used for settlement ...

Octopus mimus Gould, 1852 is an important benthic resource in the Peruvian artisanal fishery and is always in demand on the international market. Bibliographic antecedents about the culture of this species for Southeastern Pacific are few. The present study was made in the Center of Aquaculture "La Arena", Casma, Peru. The experiments were carried out in fiber glass tanks and long-line in the sea. Feeding was made with fish, crustaceans and mollusk and also was tested with wet pellets ("piensos humedos"), the last one being accepted after an starvation period. For copulation the biggest specimens were chosen (1,5 kg). Differences were observed in growth for those reared in the pools (185 and 369 g/month), the growth rate was greater than that of those in the lines of culture (120,6 g/month). The maximum paralarvae survival was 17 days to temperatures of 21 to 22 oC; they were fed with na...

This paper describes the methodology used for the culture of Pacific oyster Crassostrea gigas in an artisanal breeding pond in the La Arena acuicola center, in Casma. Reproducers at gonadal maturity phase from the culture lines of the center were used. They were prepared in fiber glass tanksi of 1000 L capacity with unfiltered sea water at 27 ± 0,9 oC, and fed with maize fecula and microalgae collected from site. In one group spawning was induced by thermal stimulation (30 to 31 oC), in the other one hydrogen peroxide was added, obtaining different responses. 20 minutes after fertilization the polar body was defined in 100% of fertilized eggs; veliger larvae were visible 24 hours after fertilization. Larvae reached the pediveliger stage 20 days after culture, with average sizes of 237 ± 10 µm. Ground shells (300pm), sandpapered black plastic and oyster valvas were used for settlement ...

Tilapia es el nombre común con el cual se conocen a diversas especies de los géneros Oreochromis y Tilapia. Las Tilapias son peces de agua dulce endémicos y originarios de África y el Cercano Oriente, aprovechando sus características y adaptabilidad, a comienzos del siglo XIX se inician las investigaciones para utilizarlas en la piscicultura rural, especialmente en el Congo Belga (actualmente Zaire). A partir de 1924 se intensifica su cultivo en Kenia, sin embargo fue en el Extremo Oriente, en Malasia en donde se obtuvieron los mejores resultados y se iniciara su progresivo cultivo en diferentes partes del mundo. En Perú, en la década del 50, la Dirección General de Caza y Pesca del Ministerio de Fomento y Agricultura realizó las primeras introducciones con la especie Tilapia rendalli, utilizada como forraje para el paiche (Arapaina gigas); en la década de los 70, el IMARPE y l...

Tilapia es el nombre común con el cual se conocen a diversas especies de los géneros Oreochromis y Tilapia. Las Tilapias son peces de agua dulce endémicos y originarios de África y el Cercano Oriente, aprovechando sus características y adaptabilidad, a comienzos del siglo XIX se inician las investigaciones para utilizarlas en la piscicultura rural, especialmente en el Congo Belga (actualmente Zaire). A partir de 1924 se intensifica su cultivo en Kenia, sin embargo fue en el Extremo Oriente, en Malasia en donde se obtuvieron los mejores resultados y se iniciara su progresivo cultivo en diferentes partes del mundo. En Perú, en la década del 50, la Dirección General de Caza y Pesca del Ministerio de Fomento y Agricultura realizó las primeras introducciones con la especie Tilapia rendalli, utilizada como forraje para el paiche (Arapaina gigas); en la década de los 70, el IMARPE y l...

The early development of the Patagonian squid, Loligo gahi D’Orbigny,1835, was studied in the field and in the laboratory. Egg strands, spawned off San Lorenzo Island, Peru, were collected, carried to the laboratory, and incubated in a closed sea water system. Egg capsules ranged from 88 to169 mm in length, and each capsule contained between 56 and 114 fertilized eggs. Individual eggs ranged from 1,7 to 2,1 mm in length, and the mantle length of hatchlings varied from 1,9 to 2,8 mm. Development took about 20 days at a mean temperature of 19 ºC. The pattern of embryonic development is similar to that previously observed in other species of Loligo. Following hatching, paralarvaes survived for 45 days with a diet of zooplankton (copepods, mysids and polychaete larvaes).

The early development of the Patagonian squid, Loligo gahi D’Orbigny,1835, was studied in the field and in the laboratory. Egg strands, spawned off San Lorenzo Island, Peru, were collected, carried to the laboratory, and incubated in a closed sea water system. Egg capsules ranged from 88 to169 mm in length, and each capsule contained between 56 and 114 fertilized eggs. Individual eggs ranged from 1,7 to 2,1 mm in length, and the mantle length of hatchlings varied from 1,9 to 2,8 mm. Development took about 20 days at a mean temperature of 19 ºC. The pattern of embryonic development is similar to that previously observed in other species of Loligo. Following hatching, paralarvaes survived for 45 days with a diet of zooplankton (copepods, mysids and polychaete larvaes).

This paper describes and provides information on the species of the genus Conus (Neogastropoda:Conidae) preserved in the Laboratorio de Biología y Sistemática de Invertebrados Marinos de la Facultad de Ciencias Biológicas (LaBSIM) y el Museo de Historia Natural de la Universidad Nacional de San Marcos (MUSM). The material was collected at the Department of Tumbes (9 locations) and Piura (16 locations). Intesive collect was realized in April 2007 and occasional in posterior years. Of the 16 reported species it is counted with material corresponding to 11 of them: Conus (Conus) gladiator Broderip, 1833; Conus (Asprella) arcuatus Broderip & Sowerby, 1829; Conus (Cylinder) lucidus Wood, 1828; Conus (Leptoconus) poormani Berry, 1968; Conus (L.) recurvus Broderip, 1833; Conus (Pyruconus) fergusoni ;Sowerby, 1873; Conus (P.) patricius Hinds, 1843; Conus (Ximeniconus) mahogani Reeve,1843;...

The following species of Gastropoda are recorded for the first time for Peruvian waters: Sthenorytis turbinus Dall, 1908, Crucibulum (Crucibulum) umbrella (Deshayes, 1830), Favartia (Murexiella) lappa (Broderip,1833), Cantharus (Cantharus) shaskyi Berry, 1959, Cantharus (Solenosteira) macrospira (Berry, 1957), Cancellaria (Bivetopsia) haemastoma Sowerby, 1832.

En el presente trabajo se describe y proporciona información sobre las especies del género Conus (Neogastropoda: Conidae) mantenidas en el Laboratorio de Biología y Sistemática de Invertebrados Marinos de la Facultad de Ciencias Biológicas (LaBSIM) y en el Departamento de Malacología y Carcinología del Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos (MUSM). Se estudió material colectado en 9 localidades del Departamento de Tumbes, y 16 del Departamento de Piura. La colecta intensiva se llevó a cabo en abril del año 2007 y fue esporádica en los años posteriores. De las 16 especies reportas para Perú hasta antes de este estudio, se cuenta con material correspondiente a 11 de ellas: Conus (Conus) gladiator Broderip, 1833; Conus (Asprella) arcuatus Broderip & Sowerby, 1829; Conus (Cylinder) lucidus Wood, 1828; Conus (Leptoconus) poormani Berry, 1968;...

Se reportan por primera vez para el mar peruano seis especies de gasterópodos: Sthenorytis turbinus Dall, 1908, Crucibulum (Crucibulum) umbrella (Deshayes, 1830), Favartia (Murexiella) lappa (Broderip,1833), Cantharus (Cantharus) shaskyi Berry, 1959, Cantharus (Solenosteira) macrospira (Berry, 1957), Cancellaria (Bivetopsia) haemastoma Sowerby, 1832. Se informa sobre la distribución, el hábitat y comentarios relevantes acerca de cada una de las especies.

Las macroalgas rigen su carácter reproductivo con relación al fotoperiodo y la temperatura del medio ambiente en donde se desarrollan. El género Chondracanthus presenta un ciclo de vida trifásico isomórfico y su reproducción es por esporas. A fin de evaluar las mejores condiciones en que se produce liberación de tetrasporas, una biomasa total de 120 gramos de la fase tetrasporofitica de Chondracanthus chamissoi fue sometida a estrés durante tres horas de desecación y luego colocado en matraces con agua de mar enriquecida para inducir la liberación de esporas. Posteriormente estas esporas fueron colocadas en envases con sustrato artificial a fin de conocer el número de esporas asentadas por centímetro de cuerda (nEA), diámetro promedio del disco de germinación (dDG) y porcentaje promedio de discos con formación de microtalo (%dM). Se evaluo tres tratamiento de fotoperiodo 1...