Abstract Se determinaron la composición proximal y el perfil de ácidos grasos en el tejido muscul... more Abstract Se determinaron la composición proximal y el perfil de ácidos grasos en el tejido muscular y vísceras de juveniles silvestres y cultivados de Totoaba macdonaldi, encontrándose diferencias en composición debido al origen de sus dietas.
Abstract We used otoliths of the endangered Totoaba macdonaldi raised under controlled conditions... more Abstract We used otoliths of the endangered Totoaba macdonaldi raised under controlled conditions to validate the relationship between temperature, the water oxygen isotope composition (δ18O) and otolith δ18O, as well as to determine the percent metabolic carbon that contributes to otolith δ13C values. Validating this relationship is instrumental in documenting environmental conditions associated with the life history of this endangered fish.
Antecedentes La totoaba (Totoaba macdonaldi) es una especie perteneciente a la familia Sciaenidae... more Antecedentes La totoaba (Totoaba macdonaldi) es una especie perteneciente a la familia Sciaenidae también conocida como curvinas, roncadores o tambores por su habilidad de producir sonidos con la vejiga natatoria. Esta especie soportó una importante pesquería durante la primera mitad del siglo XX, dando origen a muchos de los asentamientos humanos que hoy día conocemos en la parte Alta del Golfo de California.
Abstract The geochemistry of fish otoliths is a valuable tool for reconstructing environmental co... more Abstract The geochemistry of fish otoliths is a valuable tool for reconstructing environmental conditions, migrations and life histories. In this study we validate the relationship between temperature, the water oxygen isotope composition (δ18O) and otolith δ18O for the endangered Totoaba macdonaldi, raised under controlled aquaculture conditions and in the field. This type of validation is instrumental for habitat reconstruction.
Is aquaculture the answer for the endangered totoaba? CD True, Silva Loera World Aquaculture 27:4... more Is aquaculture the answer for the endangered totoaba? CD True, Silva Loera World Aquaculture 27:44, 38-43, 12/1996. The totoaba (Totoaba macdonaldi) is the largest member of the taxonomic family Sciaenidae, with maximum ...
The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) ... more The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) and reared in captivity was evaluated using Artemia salina as food source in three different treatments: Artemia enriched with either AlgaMac or Spirulina maxima and without enrichment. After 20 days, significant differences were found among treatments in terms of growth, which was significantly higher for juvenile fed AlgaMacenriched Artemia, followed by those fed unenriched Artemia. Moreover, far higher growth rates (0.74-0.88 mg day − 1 ) were obtained than those reported for other octopus species of the same size. Digestive enzyme activity during the experimental period (20 days) showed an oscillatory behavior, with a tendency to stabilize after day 15. Trypsin was the most important protease, though lipases and amylases were also present. The whole-body lipid content of the juvenile was apparently influenced by the lipid content in the food. The amino acid profile remained unaffected after juvenile were fed the different treatments; however, differences were found between the initial and final whole-body content of the juvenile, with relatively lower amounts of isoleucine, leucine and tyrosine, and relatively higher amounts of threonine, alanine and glycine after 20 days of feeding. The Artemia amino acid content of phenylalanine, isoleucine, leucine and valine was limited, and growth would likely be further promoted with a more suitable diet. Thus, O. bimaculoides is a promising species for commercial culture, and even though good results were obtained when fed Artemia, a more appropriate food source should be sought to obtain an amino acid profile that will maximize growth.
Abstract Totoaba Totoaba macdonaldi is the largest member in the family Sciaenidae and is conside... more Abstract Totoaba Totoaba macdonaldi is the largest member in the family Sciaenidae and is considered endangered. Broodstock were collected at depths of 20–50 m in the northern Sea of Cortez, and fish suffered from severe decompression problems when brought to the surface. A field decompression technique was developed to alleviate these problems. Pertinent field handling and prophylactic measures were applied to successfully transport and acclimate the broodfish to the facilities at the Faculty of Marine Science in Ensenada, ...
The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) ... more The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) and reared in captivity was evaluated using Artemia salina as food source in three different treatments: Artemia enriched with either AlgaMac or Spirulina maxima and without enrichment. After 20 days, significant differences were found among treatments in terms of growth, which was significantly higher for juvenile fed AlgaMac-enriched Artemia, followed by those fed unenriched Artemia. Moreover, far higher growth rates (0.74–0.88 mg day− 1) were obtained than those reported for other octopus species of the same size. Digestive enzyme activity during the experimental period (20 days) showed an oscillatory behavior, with a tendency to stabilize after day 15. Trypsin was the most important protease, though lipases and amylases were also present. The whole-body lipid content of the juvenile was apparently influenced by the lipid content in the food. The amino acid profile remained unaffected after juvenile were fed the different treatments; however, differences were found between the initial and final whole-body content of the juvenile, with relatively lower amounts of isoleucine, leucine and tyrosine, and relatively higher amounts of threonine, alanine and glycine after 20 days of feeding. The Artemia amino acid content of phenylalanine, isoleucine, leucine and valine was limited, and growth would likely be further promoted with a more suitable diet. Thus, O. bimaculoides is a promising species for commercial culture, and even though good results were obtained when fed Artemia, a more appropriate food source should be sought to obtain an amino acid profile that will maximize growth.
Abstract Se determinaron la composición proximal y el perfil de ácidos grasos en el tejido muscul... more Abstract Se determinaron la composición proximal y el perfil de ácidos grasos en el tejido muscular y vísceras de juveniles silvestres y cultivados de Totoaba macdonaldi, encontrándose diferencias en composición debido al origen de sus dietas.
Abstract We used otoliths of the endangered Totoaba macdonaldi raised under controlled conditions... more Abstract We used otoliths of the endangered Totoaba macdonaldi raised under controlled conditions to validate the relationship between temperature, the water oxygen isotope composition (δ18O) and otolith δ18O, as well as to determine the percent metabolic carbon that contributes to otolith δ13C values. Validating this relationship is instrumental in documenting environmental conditions associated with the life history of this endangered fish.
Antecedentes La totoaba (Totoaba macdonaldi) es una especie perteneciente a la familia Sciaenidae... more Antecedentes La totoaba (Totoaba macdonaldi) es una especie perteneciente a la familia Sciaenidae también conocida como curvinas, roncadores o tambores por su habilidad de producir sonidos con la vejiga natatoria. Esta especie soportó una importante pesquería durante la primera mitad del siglo XX, dando origen a muchos de los asentamientos humanos que hoy día conocemos en la parte Alta del Golfo de California.
Abstract The geochemistry of fish otoliths is a valuable tool for reconstructing environmental co... more Abstract The geochemistry of fish otoliths is a valuable tool for reconstructing environmental conditions, migrations and life histories. In this study we validate the relationship between temperature, the water oxygen isotope composition (δ18O) and otolith δ18O for the endangered Totoaba macdonaldi, raised under controlled aquaculture conditions and in the field. This type of validation is instrumental for habitat reconstruction.
Is aquaculture the answer for the endangered totoaba? CD True, Silva Loera World Aquaculture 27:4... more Is aquaculture the answer for the endangered totoaba? CD True, Silva Loera World Aquaculture 27:44, 38-43, 12/1996. The totoaba (Totoaba macdonaldi) is the largest member of the taxonomic family Sciaenidae, with maximum ...
The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) ... more The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) and reared in captivity was evaluated using Artemia salina as food source in three different treatments: Artemia enriched with either AlgaMac or Spirulina maxima and without enrichment. After 20 days, significant differences were found among treatments in terms of growth, which was significantly higher for juvenile fed AlgaMacenriched Artemia, followed by those fed unenriched Artemia. Moreover, far higher growth rates (0.74-0.88 mg day − 1 ) were obtained than those reported for other octopus species of the same size. Digestive enzyme activity during the experimental period (20 days) showed an oscillatory behavior, with a tendency to stabilize after day 15. Trypsin was the most important protease, though lipases and amylases were also present. The whole-body lipid content of the juvenile was apparently influenced by the lipid content in the food. The amino acid profile remained unaffected after juvenile were fed the different treatments; however, differences were found between the initial and final whole-body content of the juvenile, with relatively lower amounts of isoleucine, leucine and tyrosine, and relatively higher amounts of threonine, alanine and glycine after 20 days of feeding. The Artemia amino acid content of phenylalanine, isoleucine, leucine and valine was limited, and growth would likely be further promoted with a more suitable diet. Thus, O. bimaculoides is a promising species for commercial culture, and even though good results were obtained when fed Artemia, a more appropriate food source should be sought to obtain an amino acid profile that will maximize growth.
Abstract Totoaba Totoaba macdonaldi is the largest member in the family Sciaenidae and is conside... more Abstract Totoaba Totoaba macdonaldi is the largest member in the family Sciaenidae and is considered endangered. Broodstock were collected at depths of 20–50 m in the northern Sea of Cortez, and fish suffered from severe decompression problems when brought to the surface. A field decompression technique was developed to alleviate these problems. Pertinent field handling and prophylactic measures were applied to successfully transport and acclimate the broodfish to the facilities at the Faculty of Marine Science in Ensenada, ...
The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) ... more The performance of Octopus bimaculoides juveniles from coastal areas of Baja California (Mexico) and reared in captivity was evaluated using Artemia salina as food source in three different treatments: Artemia enriched with either AlgaMac or Spirulina maxima and without enrichment. After 20 days, significant differences were found among treatments in terms of growth, which was significantly higher for juvenile fed AlgaMac-enriched Artemia, followed by those fed unenriched Artemia. Moreover, far higher growth rates (0.74–0.88 mg day− 1) were obtained than those reported for other octopus species of the same size. Digestive enzyme activity during the experimental period (20 days) showed an oscillatory behavior, with a tendency to stabilize after day 15. Trypsin was the most important protease, though lipases and amylases were also present. The whole-body lipid content of the juvenile was apparently influenced by the lipid content in the food. The amino acid profile remained unaffected after juvenile were fed the different treatments; however, differences were found between the initial and final whole-body content of the juvenile, with relatively lower amounts of isoleucine, leucine and tyrosine, and relatively higher amounts of threonine, alanine and glycine after 20 days of feeding. The Artemia amino acid content of phenylalanine, isoleucine, leucine and valine was limited, and growth would likely be further promoted with a more suitable diet. Thus, O. bimaculoides is a promising species for commercial culture, and even though good results were obtained when fed Artemia, a more appropriate food source should be sought to obtain an amino acid profile that will maximize growth.
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