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Papers by German Bueno
Journal of Marine Science Research and Oceanography
Paralabrax humeralis known as the Peruvian rock seabass, is a serranid regularly found in the sou... more Paralabrax humeralis known as the Peruvian rock seabass, is a serranid regularly found in the southeast Pacific Ocean [1,2]. As a consequence of fishing pressure, its numbers have been declining since the 1980s. The objective of this study is to provide information about the spawning habit of P. humeralis, describing the relation between water temperatures and spawning habits. The study is one of the initiatives of the FONDEF-CONICYT ID-16I10437 project is the repopulation of these species. From November 2018 to the end of July 2021, 18 female broodstock weighing 14.4 kg laid 76.8 million eggs in 532 days and spawned at temperatures between 15.2 and 21.8 ° C. The floating egg rate and hatch-out rate were 71.4% and 75.1% respectively. The fish gonad matured correctly almost double speed in 2020 compared to 2018 and 2019. The relation between average water temperature and eggs quantity per g of female in 30 days suggests the spawning and the temperature have positive relationships, th...
Marine and Life Sciences
Global environmental change is a defining issue of our time. The ocean is a key component of the ... more Global environmental change is a defining issue of our time. The ocean is a key component of the Earth system, and yet, in-depth understanding of its roles in sustaining life has not received the attention which it deserves. Humanity must develop a new relationship with the ocean characterized by protection, sustainable production, and prosperity. Society has too much to gain by implementing sustainability solutions and too much to lose by ignoring them. Our actions or inaction now will have far-reaching implications for future of all life on Earth. Ocean blueprint that calls for enforcing 30% Marine Protected Areas by 2030 requires real transformative action. This paper contains new ideas for combining the efforts of natural and social scientists, and traditional users of sea, and explores the potential of modern technologies to assist in this campaign. ‘Smart Sea’ concept introduced in this paper envisages synergies among the problem-solving approaches including digital tools, and...
Latin American Journal of Aquatic Research, 2021
Describe the embryonic development of Paralabrax humeralis (Peruvian rock seabass) and the presen... more Describe the embryonic development of Paralabrax humeralis (Peruvian rock seabass) and the present morphology of its eggs and yolk-sac larvae using the eggs spawned by P. humeralis broodstock in captivity. The spawning occurred naturally and spontaneously in early November 2018. The egg is pelagic and round, with a diameter of 0.98 ± 0.02 mm, an oil globule, and a diameter of 0.2 ± 0.02 mm. Embryonic development started with meroblastic cleavage, reaching the first cleavage stage at 0.4 h post-fertilization (HPF), and reached 64 cells at 2.2 HPF. Blastula period, 128 cells to 30% epiboly, end at 11.3 HPF. Gastrula period, 50% epiboly to 90% epiboly, end at 19.6 HPF. In the organogenesis period, forming Kupffer’s vesicle appeared at 22.5 HPF, the separation of the caudal fin from the yolk at 30.3 HPF, and the hatching of the first larvae at 47.9 HPF. Water temperature was kept at 17.2 ± 0.2°C. The yolk-sac larvae measured 2.22 ± 0.1 mm with a pigmentation pattern of pinpoint melanoph...
Scientific Reports, 2022
Sustainability in aquaculture is a necessity of the future, not only as the most promising means ... more Sustainability in aquaculture is a necessity of the future, not only as the most promising means of supplying the protein that the world will require to feed its growing population but to offer needed conservation of the world’s ocean resources. The use of wild fish inputs in farm-raised fish outputs has been a primary concern of sustainability in aquaculture production. Herbivorous fish are more efficient converters of protein into fish flesh. Species of the genus Medialuna fish have been reported as a fast-growing, short-lived species. The native fish Acha (Medialuna ancietae Chirichigno 1987) in the Northern part of Chile is an over-exploited fish that has been associated with aquatic vegetation as a food source. We studied the feeding habits and nutritional composition of M. ancietae. For this, we developed a reference collection of marine macroalga (epidermis and nutritional composition) observed in the diet of individuals of this species for the study of digestive material. Mo...
Journal of Marine Science Research and Oceanography
Paralabrax humeralis known as the Peruvian rock seabass, is a serranid regularly found in the sou... more Paralabrax humeralis known as the Peruvian rock seabass, is a serranid regularly found in the southeast Pacific Ocean [1,2]. As a consequence of fishing pressure, its numbers have been declining since the 1980s. The objective of this study is to provide information about the spawning habit of P. humeralis, describing the relation between water temperatures and spawning habits. The study is one of the initiatives of the FONDEF-CONICYT ID-16I10437 project is the repopulation of these species. From November 2018 to the end of July 2021, 18 female broodstock weighing 14.4 kg laid 76.8 million eggs in 532 days and spawned at temperatures between 15.2 and 21.8 ° C. The floating egg rate and hatch-out rate were 71.4% and 75.1% respectively. The fish gonad matured correctly almost double speed in 2020 compared to 2018 and 2019. The relation between average water temperature and eggs quantity per g of female in 30 days suggests the spawning and the temperature have positive relationships, th...
Marine and Life Sciences
Global environmental change is a defining issue of our time. The ocean is a key component of the ... more Global environmental change is a defining issue of our time. The ocean is a key component of the Earth system, and yet, in-depth understanding of its roles in sustaining life has not received the attention which it deserves. Humanity must develop a new relationship with the ocean characterized by protection, sustainable production, and prosperity. Society has too much to gain by implementing sustainability solutions and too much to lose by ignoring them. Our actions or inaction now will have far-reaching implications for future of all life on Earth. Ocean blueprint that calls for enforcing 30% Marine Protected Areas by 2030 requires real transformative action. This paper contains new ideas for combining the efforts of natural and social scientists, and traditional users of sea, and explores the potential of modern technologies to assist in this campaign. ‘Smart Sea’ concept introduced in this paper envisages synergies among the problem-solving approaches including digital tools, and...
Latin American Journal of Aquatic Research, 2021
Describe the embryonic development of Paralabrax humeralis (Peruvian rock seabass) and the presen... more Describe the embryonic development of Paralabrax humeralis (Peruvian rock seabass) and the present morphology of its eggs and yolk-sac larvae using the eggs spawned by P. humeralis broodstock in captivity. The spawning occurred naturally and spontaneously in early November 2018. The egg is pelagic and round, with a diameter of 0.98 ± 0.02 mm, an oil globule, and a diameter of 0.2 ± 0.02 mm. Embryonic development started with meroblastic cleavage, reaching the first cleavage stage at 0.4 h post-fertilization (HPF), and reached 64 cells at 2.2 HPF. Blastula period, 128 cells to 30% epiboly, end at 11.3 HPF. Gastrula period, 50% epiboly to 90% epiboly, end at 19.6 HPF. In the organogenesis period, forming Kupffer’s vesicle appeared at 22.5 HPF, the separation of the caudal fin from the yolk at 30.3 HPF, and the hatching of the first larvae at 47.9 HPF. Water temperature was kept at 17.2 ± 0.2°C. The yolk-sac larvae measured 2.22 ± 0.1 mm with a pigmentation pattern of pinpoint melanoph...
Scientific Reports, 2022
Sustainability in aquaculture is a necessity of the future, not only as the most promising means ... more Sustainability in aquaculture is a necessity of the future, not only as the most promising means of supplying the protein that the world will require to feed its growing population but to offer needed conservation of the world’s ocean resources. The use of wild fish inputs in farm-raised fish outputs has been a primary concern of sustainability in aquaculture production. Herbivorous fish are more efficient converters of protein into fish flesh. Species of the genus Medialuna fish have been reported as a fast-growing, short-lived species. The native fish Acha (Medialuna ancietae Chirichigno 1987) in the Northern part of Chile is an over-exploited fish that has been associated with aquatic vegetation as a food source. We studied the feeding habits and nutritional composition of M. ancietae. For this, we developed a reference collection of marine macroalga (epidermis and nutritional composition) observed in the diet of individuals of this species for the study of digestive material. Mo...